Operating instructions Analytical and precision balances

Transcription

1 KERN & Sohn GmbH Ziegelei 1 D Balingen info@kern-sohn.com Phone: +49-[0] Fax: +49-[0] Internet: Operating instructions Analytical and precision balances KERN ALT_B-PLT_A-PLT_F Version /2013 GB ALT_B-PLT_A-PLT-F-BA-e-1333

2 GB KERN ALT_B-PLT_A-PLT_F Version /2013 Operating instructions Electronic analytical and precision balances Contents 1 Technical data Appliance overview Operating side Back and bottom side Keyboard overview Navigation buttons / numeric input Overview of display Basic instructions Proper use Improper Use Warranty Monitoring of Test Resources Basic Safety Precautions Pay attention to the instructions in the Operation Manual Personnel training Transport and storage Testing upon acceptance Packaging / return transport Unpacking, Setup and Commissioning Installation Site, Location of Use Unpacking, Scope of delivery Placing Connect and switch-on power supply Connection of peripheral devices Initial Commissioning Adjustment (all models excepted PLT-M) Adjustment with internal weight after pressing the CAL button Automatic adjustment with internal weight (factory setting) Adjustment with external adjustment weight Overwrite internal adjustment weight Adjustment of models PLT-M Automatic adjustment with internal weight Verification Basic Operation Switch on off balance Zeroing Simple weighing Capacity display Weighing with tare Determination of the tare weight by weighing Underfloor weighing ALT_B-PLT_A-PLT_F-BA-e-1333

3 11 Setup menu Weighing Units RS Baud rate Auto Zero Filter Stability Setting the contrast of the display Display background illumination Automatic switch-off function AUTO OFF Setting date and time Language operator guide Adjustment mode Adjustment log Main Menu Parts counting Determine reference by weighing Numeric entry of the reference weight Automatic reference optimization Density determination (Hydrostatic weighing) Density determination of solids Determining density of liquids Formula mode Formulation without using the recipe data base Formulation using the recipe data base Check weighing Percent determination Entering the reference weight by weighing Numeric entering of the reference weight Animal weighing function Peak value function GLP function (Good laboratory practice) Data output RS 232C Technical data Pin allocation of balance output plug Interface Format Data transfer Error messages Service, maintenance, disposal Clean Service, maintenance Disposal Instant help Declaration of conformity ALT_B-PLT_A-PLT_F-BA-e

4 1 Technical data KERN ALT 160-4B ALT 250-4B ALT 220-5DA ALT 310-4B Weighing range (max) 160 g 250 g 60 g; 220 g 310 g Readability (d) 0.1 mg 0.1 mg g; g 0.1 mg Reproducibility 0.1 mg 0.1 mg g 0.2 mg Linearity ± 0.3 mg ± 0.3 mg g ± 0.3 mg Stabilization time (typical) 4 s 4 s 4 s 4 s Minimum unit weight at piece counting Warm-up time Adjustment weight Reference quantities at piece counting Weighing Units Secondary voltage powerpack Operating temperature Humidity of air > 0.5 mg > 0.5 mg > 0.5 mg > 0,5 mg 8 hours internal 10, 25, 50, 100, freely selectable ct, dwt, g, gn, lb, mo, oz, ozt, tl (HK), tl (Singap. Malays), tl (Tw) 24 V AC, 500mA + 5 C C max. 80 % (not condensing) Housing (B x D x H) mm 210 x 340 x 330 Dimensions of windshield (B x D x H) mm Weighing pan (stainless steel) 160 x 140 x 205 (inside) 190 x 195 x 225 (outside) Ø 80 mm Weight kg (net) 5.7 kg 6.5 kg Interface RS 232C 4 ALT_B-PLT_A-PLT_F-BA-e-1333

5 KERN ALT 160-4BM ALT 250-4BM Weighing range (max) 160 g 250 g Readability (d) 0.1 mg 0.1 mg Reproducibility 0.1 mg 0.1 mg Linearity ± 0.3 mg ± 0.3 mg Verification value (e) 1 mg 1 mg Verification class I I Minimum load (Min) 10 mg 10 mg Stabilization time (typical) 4 s 4 s Minimum unit weight at piece counting Warm-up time Adjustment weight Reference quantities at piece counting Weighing Units Secondary voltage powerpack Operating temperature Humidity of air > 0.5 mg > 0.5 mg 8 hours internal 10, 25, 50, 100, freely selectable ct, g 24 V AC, 500mA + 5 C C max. 80 % (not condensing) Housing (B x D x H) mm 210 x 340 x 330 Dimensions of windshield (B x D x H) mm Weighing pan (stainless steel) Weight kg (net) Interface 160 x 140 x 205 (inside) 190 x 195 x 225 (outside) Ø 80 mm 5.7 kg RS 232C ALT_B-PLT_A-PLT_F-BA-e

6 KERN PLT 720-3A PLT A PLT A Weighing range (max) 720 g 1200 g 6200 g Readability (d) 1 mg 1 mg 10 mg Reproducibility 1 mg 1 mg 10 mg Linearity ± 2 mg ± 2 mg ± 30 mg Stabilization time (typical) 2 s 2 s 2 s Minimum unit weight at piece counting > 5 mg > 5 mg > 50 mg Warm-up time 4 hours 8 hours 4 hours Adjustment weight Reference quantities at piece counting Weighing Units Input Voltage Secondary voltage powerpack Operating temperature Humidity of air internal 10, 25, 50, 100, freely selectable ct, dwt, g, gn, lb, mo, oz, ozt, tl (HK), tl (Singap. Malays), tl (Tw) V AC 50 Hz 24 V AC, 500mA + 5 C / + 35 C max. 80 % (not condensing) Housing (B x D x H) mm 210 x 340 x x 340 x 100 Dimensions of windshield Weighing pan (stainless steel) Weight kg (net) Interface Underfloor weighing device Ø 150, 60 high (inside) Ø 160, 70 high (outside) Ø 11 cm 4.5 kg RS 232C Eyelet - Ø 16 cm 6 ALT_B-PLT_A-PLT_F-BA-e-1333

7 KERN PLT 420-3F PLT F Weighing range (max) 420 g 4200 g Readability (d) 1 mg 10 mg Reproducibility 1 mg 10 mg Linearity ± 4 mg ± 40 mg Stabilization time (typical) 2 s 2 s Minimum unit weight at piece counting Warm-up time Adjustment weight Reference quantities at piece counting Weighing Units Input Voltage Secondary voltage powerpack Operating temperature Humidity of air > 5 mg > 50 mg 4 hours internal 10, 25, 50, 100, freely selectable ct, g, gn, lb, mo, oz, ozt, tl (HK), tl (Singap. Malays), tl (Tw), tol V AC 50 Hz 9 V 1000 ma, DC + 5 C / + 35 C max. 80 % (not condensing) Housing (B x D x H) mm 210 x 340 x 160 Dimensions of windshield Ø 150, 60 high (inside) Ø 160, 70 high (outside) Weighing pan (stainless steel) Ø 11 cm Ø 16 cm Weight kg (net) Interface 4 kg RS 232C Underfloor weighing device - ALT_B-PLT_A-PLT_F-BA-e

8 KERN PLT 720-3AM PLT AM Weighing range (max) 720 g 6200 g Readability (d) 1 mg 10 mg Reproducibility 1 mg 10 mg Linearity 2 mg 30 mg Verification value (e) 0,01 g 0,1 g Verification class II II Minimum load (Min) 20 mg 50 mg Stabilization time (typical) 2 s 2 s Minimum unit weight at piece counting Warm-up time Adjustment weight Reference quantities at piece counting Weighing Units Input Voltage Secondary voltage powerpack Operating temperature Humidity of air > 5 mg > 50 mg 4 hours internal 10, 25, 50, 100, freely selectable ct, g V AC 50 Hz 24 V DC, 500 ma, + 5 C / + 35 C max. 80 % (not condensing) Housing (B x D x H) mm 210 x 340 x x 340 x 100 Dimensions of windshield Weighing pan (stainless steel) Ø 150, 60 high (inside) Ø 160, 70 high (outside) Ø 11 cm - Ø 16 cm Weight kg (net) 4.5 kg 4.5 kg Interface Underfloor weighing device RS 232C Eyelet 8 ALT_B-PLT_A-PLT_F-BA-e-1333

9 2 Appliance overview 2.1 Operating side Models ALT Models PLT, d = 1 mg ALT_B-PLT_A-PLT_F-BA-e

10 Models PLT, d = 10 mg Windshield Weighing pan Display Keyboard Levelling screw Bubble level Cover windshield 10 ALT_B-PLT_A-PLT_F-BA-e-1333

11 2.1.1 Back and bottom side 1. Weighing pan 2. RS232C-interface 3. Footscrews 4. Mains adapter connection 5. Casing screws (in models with four feet first screw out both rear feet) 6. Underfloor weighing device (remove cover) ALT_B-PLT_A-PLT_F-BA-e

12 2.2 Keyboard overview Key Description Description MENU button Invoke main menu How to select menu items Press until the acoustic signal gets mute Invoke setup menu Exit setup menu ON/OFF button CAL-key PRINT button TARE button Turn on/off Exit main menu Adjustment How to select menu items Calculate weighing data via interface Confirm / store settings Taring Zeroing 12 ALT_B-PLT_A-PLT_F-BA-e-1333

13 2.2.1 Navigation buttons / numeric input Key Description Function Navigation button Increase digit Scroll forward in menu Set decimal place Navigation button Reduce digit Scroll backwards in menu Change capital/small letters Press MENU button until the acoustic signal gets mute Position digit Navigation button Delete input Navigation button Store ESC cancel ALT_B-PLT_A-PLT_F-BA-e

14 2.3 Overview of display 1 Capacity display 2 Stability display 3 Zero indicator 4 Numerical display/menu 5 Unit 6 Current time 7 Current date Display Description see chap. Stability display + Chap Zero indicator + Chap Balance is in percent determination mode + Chap PC Balance is in parts counting mode + Chap H Upper limit + Chap L Lower limit DS The balance is in density determination mode + Chap g Weighing unit Gram ct Weighing unit Carat Oz Weighing unit Ounce Lb Weighing unit Pound Dwt Weighing unit Pennyweights Ozt Weighing unit Troy ounce Chap GN Weighing unit Grain tl 1 Weighing unit Hongkong Tael tl 2 Weighing unit Singapore Tael tl 3 Weighing unit Taiwan Tael mo Weighing unit Momme 14 ALT_B-PLT_A-PLT_F-BA-e-1333

15 Operator guidance: In a selected application you are guided step-by-step through that application. Selectable languages (D, GB, F, IT. ESP, P; see chap ). Display example Piece counting 8 Active application 9 Current date 10 Current time 11 Operation step to be carried out ALT_B-PLT_A-PLT_F-BA-e

16 3 Basic instructions 3.1 Proper use The balance you purchased is intended to determine the weighing value of material to be weighed. It is intended to be used as a non-automatic balcance, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing pan.. As soon as a stable weighing value is reached the weighing value can be read. 3.2 Improper Use Do not use balance for dynamic weighings. In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the stability compensation. (Example: Slowly draining fluids from a container on the balance.) Do not leave permanent load on the weighing pan. This may damage the measuring system. Impacts and overloading exceeding the stated maximum load (max) of the balance, minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this. Never operate balance in explosive environment. The serial version is not explosion protected. The structure of the balance may not be modified. This may lead to incorrect weighing results, safety-related faults and destruction of the balance. The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing. 3.3 Warranty Warranty claims shall be voided in case 1. Our conditions in the operation manual are ignored 2. The appliance is used outside the described uses 3. The appliance is modified or opened 4. Mechanical damage or damage by media, liquids, natural wear and tear 5. The appliance is improperly set up or incorrectly electrically connected 6. The measuring system is overloaded 3.4 Monitoring of Test Resources In the framework of quality assurance the measuring-related properties of the balance and, if applicable, the testing weight, must be checked regularly. The responsible user must define a suitable interval as well as type and scope of this test. Information is available on KERN s home page ( with regard to the monitoring of balance test substances and the test weights required for this. In KERN s accredited DKD calibration laboratory test weights and balances may be calibrated (return to the national standard) fast and at moderate cost. 16 ALT_B-PLT_A-PLT_F-BA-e-1333

17 4 Basic Safety Precautions 4.1 Pay attention to the instructions in the Operation Manual Carefully read this operation manual before setup and commissioning, even if you are already familiar with KERN balances. All language versions contain a non-binding translation. The original German is binding. 4.2 Personnel training The appliance may only be operated and maintained by trained personnel. 5 Transport and storage 5.1 Testing upon acceptance When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage. 5.2 Packaging / return transport Keep all parts of the original packaging for a possibly required return. Only use original packaging for returning. Prior to dispatch disconnect all cables and remove loose/mobile parts. Reattach possibly supplied transport securing devices. Secure all parts such as the glass wind screen, the weighing platform, power unit etc. against shifting and damage. ALT_B-PLT_A-PLT_F-BA-e

18 18 ALT_B-PLT_A-PLT_F-BA-e-1333

19 6 Unpacking, Setup and Commissioning 6.1 Installation Site, Location of Use The balances are designed in a way that reliable weighing results are achieved in common conditions of use. You will work accurately and fast, if you select the right location for your balance. On the installation site observe the following: Place the balance on a firm, level surface Avoid extreme heat as well as temperature fluctuation caused by installing next to a radiator or in the direct sunlight Protect the balance against direct draughts due to open windows and doors Avoid jarring during weighing Protect the balance against high humidity, vapours and dust Do not expose the device to extreme dampness for longer periods of time. Non-permitted condensation (condensation of air humidity on the appliance) may occur if a cold appliance is taken to a considerably warmer environment. In this case, acclimatize the disconnected appliance for ca. 2 hours at room temperature. Avoid static charge of goods to be weighed and weighing container. Major display deviations (incorrect weighing results) may be experienced should electromagnetic fields (e.g. due to mobile phones or radio equipment), static electricity accumulations or instable power supply occur. Change location or remove source of interference. ALT_B-PLT_A-PLT_F-BA-e

20 6.2 Unpacking, Scope of delivery Remove device and accessories carefully from packaging, remove packaging material and place device at the planned work place. Verify that there has been no damage and that all packing items are present. Scope of delivery / serial accessories: Balance, see chap. 2 Mains adapter Protective cover Operating instructions Transport Securing 6.3 Placing The right place is decisive for the accuracy of the weighing results of high-resolution analytical and precision balances (see chap. 6.1). Remove transportation lock On the left lower side of the balance replace the golden-coloured screw with the silver-coloured one (see label). 20 ALT_B-PLT_A-PLT_F-BA-e-1333

21 Install weighing pan as per illustration Models ALT Models PLT, d = 1 mg Models PLT, d = 10 mg ALT_B-PLT_A-PLT_F-BA-e

22 Levelling balance Level balance with foot screws until the air bubble of the water balance is in the prescribed circle. Check levelling regularly. 6.4 Connect and switch-on power supply Before connecting the mains adapter check if the printed voltage value is the same as the local supply voltage. Only use KERN original mains adapter. Using other makes requires consent by KERN. Supply power to balance via mains adapter. The balance will carry out a self-test Then the balance is set into stand-by mode, OFF is displayed. To switch on press the ON/OFF button. During the display CAL adjustment is automatically carried out with the internal adjustment weight (see chap. 7.2). As soon as the weight display appears, the balance is ready for weighing. To switch off, press the ON/OFF button again. The balance returns into stand-by mode. 6.5 Connection of peripheral devices Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the balance from the power supply. With your balance, only use accessories and peripheral devices by KERN, as they are ideally tuned to your balance. 6.6 Initial Commissioning In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1). During this warming up time the balance must be connected to the power supply (mains, accumulator or battery). The accuracy of the balance depends on the local acceleration of gravity. Strictly observe hints in chapter Adjustment. 22 ALT_B-PLT_A-PLT_F-BA-e-1333

23 7 Adjustment (all models excepted PLT-M) As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory). This adjustment process must be carried out for the first commissioning, after each change of location as well as in case of fluctuating environment temperature. To receive accurate measuring values it is also recommended to adjust the balance periodically in weighing operation. Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization. Ensure that there are no objects on the weighing pan. Issue of an adjustment log, see chap The balances have been set to Automatic adjustment (see chap. 7.2) by factory. If necessary, in the menu the following possibilities of adjustment can be activated. Internal adjustm. External adjustm. Technical adjustm. Autom. adjustm. Adjustment with internal weight after pressing CAL Adjustment with external weight Overwrite internal adjustment weight Automatic adjustment with internal weight. ALT_B-PLT_A-PLT_F-BA-e

24 Setting adjustment mode: In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Adjustment mode. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Description Procedure see chap. Internal adjustm. Adjustment with internal adjustment weight Chap. 7.1 External adjustm. Adjustment with external adjustment weight Chap. 7.3 Technical adjustm. Autom. adjustm. Overwrite internal adjustment weight Automatic adjustment with internal adjustment weight Chap. 7.4 Chap. 7.2 Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 24 ALT_B-PLT_A-PLT_F-BA-e-1333

25 7.1 Adjustment with internal weight after pressing the CAL button Condition: Menu setting Internal adjustm., see chap. 7 In weighing mode press the CAL button, adjustment will take place automatically. After successful adjustment the balance automatically returns to weighing mode. In case of an adjustment error (e.g. objects on the weighing pan) the display will show an error message CAL but, repeat adjustment using the CAL button. 7.2 Automatic adjustment with internal weight (factory setting) Condition: Menu setting Autom. adjustm., see chap. 7 The automatic adjustment with internal weight (see chap. 7.1) is started automatically, if the balance after the weighing balance was disconnected from the mains after pressing ON/OFF in stand-by mode after a temperature change of 1.5 C with non loaded weighing pan / zero display after a time interval of 20 min with non loaded weighing pan / zero display The automatic adjustment function is always enabled. However you can make a manual adjustment at any time with the internal or an external weight, see chap. 7.1 or chap ALT_B-PLT_A-PLT_F-BA-e

26 7.3 Adjustment with external adjustment weight Condition: Menu setting External adjustm., see chap. 7 At the models with internal adjustment weight the adjustment with external weight is not recommended. Information about test weights you will find in the internet under Ensure that there are no objects on the weighing pan. In weighing mode press the CAL button. Wait until the weighed value for the required adjustment weight appears flashing. During the flashing display put the required adjustment weight carefully in the center of the weighing pan. The flashing display disappears. After successful adjustment the balance automatically returns to weighing mode. Take away adjustment weight 26 ALT_B-PLT_A-PLT_F-BA-e-1333

27 7.4 Overwrite internal adjustment weight Overwriting is restricted to specialist staff possessing well acquainted with the workings of weighing scales. Information about test weights you will find in the internet under Call up menu item Techn. adjustment, see chap. 7. To confirm press the PRINT button and keep it pressed until the acoustic signal gets mute. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. Ensure that there are no objects on the weighing pan. Press the CAL key Wait until the weighing value of the adjustment weight appears flashing. During the flashing display put the required adjustment weight carefully in the center of the weighing pan. The flashing display disappears. Wait for stability display, remove adjustment weight. Keep the PRINT button pressed until the acoustic signal gets mute. The internal adjustment weight is overwritten. After successful overwriting, the balance automatically returns to weighing mode. ALT_B-PLT_A-PLT_F-BA-e

28 8 Adjustment of models PLT-M As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory). This adjustment process must be carried out for the first commissioning, after each change of location as well as in case of fluctuating environment temperature. To receive accurate measuring values it is also recommended to adjust the balance periodically in weighing operation. Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization. Ensure that there are no objects on the weighing pan. Issue of an adjustment log, see chap ALT_B-PLT_A-PLT_F-BA-e-1333

29 8.1 Automatic adjustment with internal weight The automatic adjustment with internal weight is started automatically, if the balance after the weighing balance was disconnected from the mains after pressing ON/OFF in stand-by mode after a temperature change of 1.5 C with non loaded weighing pan / zero display after a time interval of 20 min with non loaded weighing pan / zero display The automatic adjustment function is always enabled. At any time, however, you can carry out a manual adjustment (press CAL-button) using the internal adjustment weight, see chap Or selecting the adjustment mode in the menu: In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Adjustment mode. Confirm by the PRINT button, Autom. Just. will be displayed. Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

30 9 Verification General introduction: According to EU directive 90/384/EEC balances must be officially verified if they are used as follows (legally controlled area): a) For commercial transactions if the price of goods is determined by weighing. b) For the production of medicines in pharmacies as well as for analyses in the medical and pharmaceutical laboratory. c) For official purpose. d) For manufacturing final packages. In cases of doubt, please contact your local trade in standard. Verification notes: An EU type approval exists for balances described in their technical data as verifiable. If a balance is used where obligation to verify exists as described above, it must be verified and re-verified at regular intervals. Re-verification of a balance is carried out according to the respective national regulations. The validity for verification of balances in Germany is e.g. 2 years. The legal regulation of the country where the balance is used must be observed! After verification the balance is sealed at the indicated positions. Verification of the balance is invalid without the "seal". Position of the seal mark (models PLT) Balances with obligation to verify must be taken out of operation if: The weighing result of the balance is outside the error limit. Therefore, in regular intervals load balance with known test weight (ca. 1/3 of the max. load) and compare with displayed value. The reverification deadline has been exceeded. 30 ALT_B-PLT_A-PLT_F-BA-e-1333

31 10 Basic Operation 10.1 Switch on off balance Start-up: In stand-by mode (see chap. 6.4) press ON/OFF button. As soon as the weight display appears, the balance is ready for weighing. Switching off: Press ON/OFF. The balance changes into standby mode, that means that the balance is now in state ready-for-operation.. To switch-off the balance completely, separate balance from power supply Zeroing Unload the balance Press the TARE key. The zero display and the indicator [-0-] will appear. ALT_B-PLT_A-PLT_F-BA-e

32 10.3 Simple weighing In order to obtain exact weighing results, your balance must have reached the operating temperature (see warming up time chap. 1). Wait for zero display, reset to zero using TARE. Place goods to be weighed on balance. Wait until the stability display appears [ ]. Read weighing result. When an optional printer is connected, the weighing value can be edited. Printout examples (KERN YKB-01N): :41:17 Current date/time Weight: g Measuring Value 10.4 Capacity display The capacity display [ ] runs from below to above and proceeds according to the loaded weight on the balance. Its full height is reached at maximum load. This is an analogue display of the current allocation of the weighing area. 32 ALT_B-PLT_A-PLT_F-BA-e-1333

33 10.5 Weighing with tare Determination of the tare weight by weighing The dead weight of any weighing container may be tared away by pressing a button, so that the following weighing procedures show the net weight of the goods to be weighed. Put weighing container on the weighing pan. Wait until stability display [ ] appears and then press the TARE-button; Tare is displayed. After standstill control the zero display appears. The weight of the container is now internally saved. Note: Weigh the material. Wait until the stability display appears [ ]. Read net weight. When the balance is unloaded the saved taring value is displayed with negative sign. To delete the stored tare value, remove load from weighing pan and press the TARE button. Tare is displayed, wait until the zero display appears. The taring process can be repeated any number of times. The limit is reached when the whole weighing range is exhausted. ALT_B-PLT_A-PLT_F-BA-e

34 10.6 Underfloor weighing Objects unsuitable for placing on the weighing scale due to size or shape may be weighed with the help of the flush-mounted platform. Proceed as follows: Switch off the balance. Open closing cover (1) at the balance bottom. Suspend hook for underfloor weighing carefully and completely. Place weighing balance over an opening. Attach load to hook and carry out weighing procedure. 1 CAUTION Always ensure that all suspended objects are stable enough to hold the desired goods to be weighed safely (danger of breaking). Never suspend loads that exceed the stated maximum load (max) (danger of breaking) Always ensure that there are no persons, animals or objects that might be damaged underneath the load. After completing the underfloor weighing the opening on the bottom of the balance must always be closed (dust protection). 34 ALT_B-PLT_A-PLT_F-BA-e-1333

35 11 Setup menu In the setup menu, the balance settings can be modified. This way, the balance can be adjusted to individual weighing requirements. Navigation in the menu: Access to menu In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. 2 sec. How to select menu items Use the navigation buttons to select the individual menu items one by one. The cursor ( ) displays the current setting. Change settings Acknowledge selected menu item using PRINT button, the current setting is displayed. Each time the navigation buttons are pressed the next setting will be displayed. Save settings Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to menu mode as follows. Exit menu/ back to weighing mode Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

36 Menu overview (all models excepted PLT-M) Menu item Selection Description Weight units (see chap. 11.1) Serial output (see chap. 11.2) Baud rate (see chap. 11.3) Auto zero Automatic zero point correction (see chap. 11.4) Filter (see chap. 11.5) g ct Oz Lb Dwt Ozt GN tl 1 tl 2 tl 3 mo Continuous On demand Generic printer Printer Tlp On demand - Glp Generic print. - Glp Printer Tlp - Glp 1200 Baud 2400 Baud 4800 Baud 9600 Baud Auto zero OFF Auto zero 1 Auto zero 2 Auto zero 3 Auto zero 3E Filter 1 Filter 2 Filter 3 Stability (see chap. 11.6) Stability 1 Stability 2 Stability 3 Gram Carat Ounce Pound Pennyweights Troy ounce Grain Hongkong-Teal Singapur-Teal Taiwan-Teal Momme Continuous output Output of stable weighing values after pressing PRINT button Not documented Not documented GLP conformant printouts after pressing the PRINT button Not documented Not documented Transfer speed Auto Zero switched off Auto Zero range ± ½ Digit Auto Zero range ± 3 Digits Auto Zero range ± 7 Digits Auto Zero range ± 7 digits in the whole weighing range Setting for dispensing Sensitive and fast, very quiet set-up location. Robust but slow, busy set-up location. Standstill control fast / very quiet set-up location Standstill control fast + exact / quiet set-up location Standstill control exact /very set-up location. 36 ALT_B-PLT_A-PLT_F-BA-e-1333

37 Contrast adjustment (see chap. 11.7) 1-15 Setting the contrast of the display Backlight (see chap. 11.8) on Background illumination on Timer OFF Automatic switch-off function in stand-by mode (see chap. 11.9) Time and date (see chap Language (see chap ) Calibration mode (see chap ) off Auto Disable 2 minutes 5 minutes 15 minutes English / Deutsch Français Español Português English Italiano External calibration Auto calibration Background illumination off Backlighting automatically switched off 3 seconds after achieving stable weighing value. Changes in weight or pressing of keys will automatically result in backlight switching on again. AUTO-OFF switched off AUTO-OFF after 2 minutes without changing the weight AUTO-OFF after 5 minutes without changing the weight AUTO-OFF after 15 minutes without changing the weight Setting date and time Language operator guide Adjustment with external weight Automatic adjustment with internal weight Calibration info (see chap ) Return Internal calibration Technical calib. Adjustment with internal weight after pressing CAL Overwriting the internal adjustment weight Record output of the last adjustment Back to weighing mode ALT_B-PLT_A-PLT_F-BA-e

38 Menu overview models PLT-M: Menu item Selection Description Units (see chap. 11.1) RS 232 (see chap.11.2) Baud rate (see chap. 11.3) Auto zero Automatic zero point correction (see chap. 11.4) Filter (see chap. 11.5) g ct Continuous PRINT button Not documented - Not documented - PRINT button + GLP Not documented - Gram Carat Continuous output Output of stable weighing values after pressing PRINT key GLP conformant printouts after pressing the PRINT button Not documented Baud 2400 Baud Transfer speed 4800 Baud 9600 Baud Auto zero OFF Auto Zero switched off Auto zero 1 Filter 1 Filter 2 Filter 3 Stability (see chapter 9.6). Stability 1 Stability 2 Stability 3 Auto Zero range ± ½ Digit Setting for dosage Sensitive and fast, very quiet set-up location. Robust but slow, busy set-up location. Standstill control fast / very quiet set-up location Standstill control fast + exact / quiet set-up location Standstill control exact /very busy set-up location. 38 ALT_B-PLT_A-PLT_F-BA-e-1333

39 Display contrast (see chap.11.7) Background illumination of the display (see chap. 11.8) AUTO-OFF Automatic switch-off function in stand-by mode (see chap. 11.9) Time and date (see chap 11.10) Language (see chap ) Adjustment mode (see chap ) Adjustment log (see chap ) Back 1-15 Select contrast on off Auto Disabled 2 min 5 min 15 min Deutsch Français Español Português English Italiano Autom. adjustm. Background illumination on Background illumination off Background illumination automatically switched off 3 seconds after achieving stable weighing value. Changes in weight or pressing of keys will automatically result in background illumination switching on again. AUTO-OFF switched off AUTO-OFF after 2 minutes without changing the weight AUTO-OFF after 5 minutes without changing the weight AUTO-OFF after 15 minutes without changing the weight Setting date and time Language operator guide Automatic adjustment with internal weight Back to weighing mode ALT_B-PLT_A-PLT_F-BA-e

40 11.1 Weighing Units According to the requirements the balance can be switched over into different units. Selected weighing unit will be retained even after disconnection from the mains. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Weight units. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.! In models PLT-M only gram and carat are available. Symbol Weighing unit Conversion factor 1g = g Gram 1. ct Carat 5. Oz Ounce Lb Pound Dwt Pennyweights Ozt Troy ounce GN Grain tl 1 Hongkong-Teal tl 2 Singapur-Teal tl 3 Taiwan-Teal mo Momme Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 40 ALT_B-PLT_A-PLT_F-BA-e-1333

41 11.2 RS232 In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Serial output. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Continuous On demand Generic printer Printer Tlp On demand - Glp Generic print. - Glp Printer Tlp - Glp Description Continuous data output Output of stable weighing values after pressing PRINT key Not documented Not documented GLP conformant printouts after pressing the PRINT button Not documented Not documented Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

42 11.3 Baud rate In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Baud rate. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Selectable 1200, 2400, 4800, 9600 baud. Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 42 ALT_B-PLT_A-PLT_F-BA-e-1333

43 11.4 Auto Zero Under this menu item the automatic zero point correction can be switched on or off. In switched-on-state the zero point is automatically corrected at drift or when dirty. Note: In the event that small quantities are removed or added to the material to be weighed, incorrect weighing results can be displayed due to the stability compensation. (e.g. slow flow of liquids from a container placed on the balance, evaporating processes). When apportioning involves small variations of weight, it is advisable to switch off this function. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Auto Zero. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.! In models PLT-M only Auto Zero Off and Auto Zero 1 are available. Display Auto Zero off Description Auto Zero switched off Auto Zero 1 Auto Zero range ± ½ Digit Auto Zero 2 Auto Zero range ± 3 Digits Auto Zero 3 Auto Zero range ± 7 Digits Auto Zero 3E Auto Zero range ± 7 digits in the whole weighing range Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

44 11.5 Filter This menu item allows the balance to be set according to specific ambient conditions and measuring purposes. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Filter. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Description Filter 1 Setting for dispensing Filter 2 The balance reacts quickly and in a sensitive manner, quiet set-up location. Filter 3 The balance reacts slowly and in a robust manner, busy set-up location Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 44 ALT_B-PLT_A-PLT_F-BA-e-1333

45 11.6 Stability In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Stability. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Description Stability 1 Standstill control fast - very quiet set-up location Stability 2 Standstill control fast + exact quiet set-up location Stability 3 Standstill control exact / set-up location. Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

46 11.7 Setting the contrast of the display To set the contrast of the display you can choose between 15 values. In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Contrast adjustment. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Description 0 small contrast 15 high contrast Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 46 ALT_B-PLT_A-PLT_F-BA-e-1333

47 11.8 Display background illumination In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Backlight. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Auto Description Backlighting automatically switched off 3 seconds after achieving stable weighing value. Changes in weight or pressing of keys will automatically result in backlight switching on again On Background illumination on off Background illumination on Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

48 11.9 Automatic switch-off function AUTO OFF In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Timer off. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Display Description Disabled AUTO-OFF switched off 2 minutes AUTO-OFF after 2 minutes without changing the weight 5 minutes AUTO-OFF after 5 minutes without changing the weight 15 minutes AUTO-OFF after 15 minutes without changing the weight Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 48 ALT_B-PLT_A-PLT_F-BA-e-1333

49 11.10 Setting date and time In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Time and date. Acknowledge using PRINT button, the current setting is displayed. Use navigation buttons to select the required format. DD-MM: day / month MM-DD: month / day Acknowledge the format with the PRINT button and set date and time as follows. The active digit e.g. 25 is shown underlined. Use the navigation buttons to set the day and confirm using the PRINT button. The active digit wanders to the month, (is shown underlined). Use the navigation buttons to set the month and confirm using the PRINT button. Set year, hours, minutes and seconds in the same way. After finishing the input, press the PRINT button and keep it pressed until the acoustic signal gets mute. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. The set date and time are displayed. ALT_B-PLT_A-PLT_F-BA-e

50 11.11 Language operator guide In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Language. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting. Language Deutsch Français Español Português English Italiano Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 50 ALT_B-PLT_A-PLT_F-BA-e-1333

51 11.12 Adjustment mode In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Calibration mode. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the desired setting.! In models PLT-M only automatic adjustment is available. Display Description Procedure see chap. Internal adjustm. Adjustment with internal weight after pressing the CAL button + Chap. 7.1 External adjustm. Adjustment with external adjustment weight + Chap. 7.3 Technical adjustm. Autom. adjustm. Overwrite internal adjustment weight Automatic adjustment with internal adjustment weight + Chap Chap or 8.1 (PLT-M) Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to weighing mode as follows. Press the MENU button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. ALT_B-PLT_A-PLT_F-BA-e

52 11.13 Adjustment log This function helps to print out a record of the last adjustment. Make sure that the communication parameter of balance and printer are the same. Communication parameters, see chap. 9.2 and 11.3 In weighing mode press the MENU button and keep it pressed until the acoustic signal gets mute. The setup menu is displayed. Use the navigation buttons to select the menu item Calibration info. Confirm with PRINT button; date, time, adjustment type and deviation of the last adjustment are displayed. If you connect an optional printer you can also print these data by pressing the PRINT key. Printout example (KERN YKB-01N): :41:17 Current date/time Calibration: :11:17 Date/time of the last adjustment Internal calib. Type of adjustment Corr. : 0.21 g Deviation from last adjustment Press the ON/OFF key. Weighing balance returns to menu. Either make more adjustments in the menu if required or press ON/OFF button anew; the balance will return into weighing mode. 52 ALT_B-PLT_A-PLT_F-BA-e-1333

53 12 Main Menu Navigation in the menu: Access to menu In weighing mode press MENU button. The master menu will be displayed. How to select menu items Use the navigation buttons to select the individual menu items one by one. The cursor ( ) displays the current setting. Change settings Acknowledge selected menu item using PRINT button, the current setting is displayed. Each time the navigation buttons are pressed the next setting will be displayed. Save settings Take over selection using the PRINT button. Weighing balance returns to menu. Either make more settings in the menu or go back to menu mode as follows. Exit menu/ back to weighing mode Press the ON/OFF key. ALT_B-PLT_A-PLT_F-BA-e

54 12.1 Parts counting Before the balance can count parts, it must know the average part weight (i.e. reference). Proceed by putting on a certain number of the parts to be counted. The balance determines the total weight and divides it by the number of parts, the socalled reference quantity. Counting is then carried out on the basis of the calculated average piece weight. As a rule: The higher the reference quantity the higher the counting exactness Determine reference by weighing In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Piece counting. Acknowledge using PRINT button, the currently set reference quantity is displayed. Use the navigation buttons to select the desired setting. Display Description 10 off Reference piece number off Reference piece number off Reference piece number off Reference piece number 100 Manual Numerical input of reference weight, see chap ALT_B-PLT_A-PLT_F-BA-e-1333

55 If necessary place a weighing container, confirm the set reference piece number by pressing the PRINT button. Place as many pieces to add-up as required by the set reference piece number. Acknowledge using PRINT button and wait for stability display. As soon as the weighing result is stable, the determined average piece weight will be taken over as reference weight. The currently placed weight W, the reference weight MPW and the piece number PCS are displayed. Remove reference weight. The balance is now in parts counting mode counting all units on the weighing pan. ALT_B-PLT_A-PLT_F-BA-e

56 If it was impossible to determine a reference due to instable goods to be weighed or an insufficient reference weight, the following display will appear during reference calculation. Smallest counting weight not achieved Increase the counted weight or select a balance with high resolution or If in the display Add pieces.. appears, the balance asks for a reference optimisation, as the placed number of pieces was not sufficient for a correct reference calculation. Place more parts, but at least the double quantity. Press the PRINT button, the reference is calculated anew. The placed quantity is always too small, add more parts (double quantity) and acknowledge using the PRINT button. Repeat the procedure until the piece counter display appears. Placed quantity sufficient for reference determination. Remove reference weight. The balance is now in parts counting mode counting all units on the weighing pan. 56 ALT_B-PLT_A-PLT_F-BA-e-1333

57 Carry out parts counting After having calculated the reference, place the pieces which will be counted. The currently placed weight G, the reference weight AUW and the calculated piece number St. are displayed. The display value can be printed out by connecting an optional printer. Printout example (KERN YKB-01N): :41:17 Current date/time PCS 20 Calculated piece number Weight: 199,9985 g Weight placed on balance MPW: g Reference weight Return to weighing mode Press the ON/OFF key ALT_B-PLT_A-PLT_F-BA-e

58 Numeric entry of the reference weight If the piece weight (reference) is known, it can be entered directly. As the balance in this method needs not to calculate any reference, the balance after confirming the reference piece weight will be directly in parts counting mode. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Piece counting. Acknowledge using PRINT button, the currently set reference quantity is displayed. Use the MENU button to select the Manual setting. Confirm by pressing the PRINT button. Use the navigation buttons (see chap ) to enter the known reference piece weight in grams. To set a decimal point press the CAL button long time. The input is deleted by pressing the TARE button a longer time. Confirm by pressing the PRINT button. From here on the balance is in parts counting mode and counts all pieces which are placed on the weighing pan (see chap Carry our parts counting ). If the minimum parts weight is not reached, an error message will appear. Use the ON/OFF button to return to the weighing mode and restart the procedure. Return to weighing mode Press the ON/OFF key 58 ALT_B-PLT_A-PLT_F-BA-e-1333

59 Automatic reference optimization In order to improve the counting exactness, the reference can be optimised by adding more pieces. At every reference optimisation, the reference weight is calculated anew. As the additional pieces increase the base for the calculation, the reference also becomes more exact. Leave the piece number on the weighing pan after setting the reference weight Duplicate the number of pieces on the weighing pan and wait until the acoustic signal sounds. The reference weight is calculated anew. Either repeat the reference optimisation by adding more pieces (max. 255 pieces) or start the counting process. The automatic reference optimisation is not active when the reference weight is entered numerically. ALT_B-PLT_A-PLT_F-BA-e

60 12.2 Density determination (Hydrostatic weighing) Density is the relationship of weight [g] : volume [cm 3 ]. The weight is determined by weighing the sample in air. The volume results from the ascending force [g] of the sample dipped in a liquid. The density [g/cm 3 ] of that liquid is known (principle of Archimedes). The density is determined with help of the underfloor weighing device. We recommend to switch off the automatic adjustment in the setup menu, see chap Density determination of solids Prepare the balance as follows: Switch off the balance Remove the weighing pan and carefully turn over the weighing balance. Suspend hook for underfloor weighing (optional) Place weighing balance over an opening Prepare suspension device Fill measuring liquid e.g. water in a vessel e.g. beaker and temper it. Calculate density: In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Density. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select setting Solid body. Confirm using the PRINT button, the set density of the measuring liquid is displayed (factory setting for dest. water at 20 C). Use the navigation buttons (see chap ) to enter the current density of the measuring liquid. For water see the following density table. Confirm with PRINT button, the display for calculation of Weight in air is displayed. 60 ALT_B-PLT_A-PLT_F-BA-e-1333

61 Suspend sample with suspension device at the flush-mounted hook. Wait for stability display, take over the weight value using PRINT button. The display for determination of the "sample in water appears. Immerse the sample without bubbles developing. Make sure that the sample does not touch the beaker. Wait for stability display, take over the weight value using PRINT button. The density of the sample is shown. ALT_B-PLT_A-PLT_F-BA-e

62 When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): :14:57 d: g/cm 3 If at the density determination errors have appeared, d----- is displayed. 1. Back to density determination mode, press MENU button. 2. Back to weighing mode, press ON/OFF button. 62 ALT_B-PLT_A-PLT_F-BA-e-1333

63 Density table of water: * the asterisk means that the cipher left from the comma is reduced by 1. Table from "Mass determination" by M. Kochsiek, M. Gläser ALT_B-PLT_A-PLT_F-BA-e

64 Determining density of liquids For density determination of liquids, a sinker with known density is used (optionally available). The sinker is weighed first in air and then in the liquid whose density is to be determined. From the weight difference results the buoyancy from where the software calculates the density. Preparation: Fill sample liquid into a vessel, e.g. a pitcher. Heat sample liquid until temperature is constant. Prepare a sinker with known density Calculate density: In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Density. Acknowledge using PRINT button, the current setting is displayed. Use the navigation buttons to select the setting Liquid. Confirm using the PRINT button, the set density of the sinker is displayed (factory setting g/cm 3 ). Use the navigation buttons (see chap ) to enter the current density of the sinker. Confirm by pressing the PRINT button. The display for weight determination of the "Sinker in air appears. 64 ALT_B-PLT_A-PLT_F-BA-e-1333

65 Suspend sinker with suspension device at the flush-mounted hook. Wait for stability display, take over the weight value using PRINT button. The display for weight determination of the "Sinker in sample liquid appears. Immerse the sample without bubbles developing. Make sure that the sample does not touch the beaker. Wait for stability display, take over the weight value using PRINT button. The density of the sample is shown. ALT_B-PLT_A-PLT_F-BA-e

66 If at the density determination errors have appeared, d----- is displayed. When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): :14:57 d : g/cm 3 1. Back to density determination mode, press MENU button. 2. Back to weighing mode, press ON/OFF button. 66 ALT_B-PLT_A-PLT_F-BA-e-1333

67 12.3 Formula mode The formula function allows weighing of components which are in a certain relation one to the other. For check purpose, the weight of all components, as well as the total weight (TOT) can be printed out. The balance works with a separated memory for the weight of the weighing container and of the formula components Formulation without using the recipe data base Select formula mode Manual In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Formulation. Confirm by pressing the PRINT button. Confirm by pressing the PRINT button. The display for weighing the first component appears. Weighing components Tare when using a weighing container Weighing the first component (e.g. 15 g). Confirm by pressing the PRINT button. The weight is added to the summation memory and printed if an optional printer is connected. ALT_B-PLT_A-PLT_F-BA-e

68 Weighing the second component (e.g. 5 g). Confirm by pressing the PRINT button. The weight is added to the summation memory and printed if an optional printer is connected. If required, weigh more components (max. 99) as described above. Complete Formulation process Press the PRINT button and keep it pressed until the acoustic signal gets mute. The total weight (TOT:) of all components will be displayed and edited on the printer. Printout example (KERN YKB-01N): :14:57 Date/time Manual Recipe mode g Weighing 1. component g Weighing 2. component T = g Total weight Back to formula mode, press the ON/OFF button and start the next Formulation. Back to weighing mode, press ON/OFF button repeatedly. 68 ALT_B-PLT_A-PLT_F-BA-e-1333

69 Formulation using the recipe data base Store recipes The balance contains a recipe data base, where maximally 99 recipes each with 20 components can be filed. Select formula mode In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Formula. Confirm by pressing the PRINT button. Define recipe and components 1. Use the navigation buttons to select the memory space number (e.g. 01) for the recipe. Press the PRINT button and keep it pressed until the acoustic signal gets mute. The display for entering the recipe name appears. 2. Use the navigation buttons (see chap ) to enter the recipe name (max. 20 characters). ALT_B-PLT_A-PLT_F-BA-e

70 3. Confirm by pressing the PRINT button. The display for entering the first component name appears. 4. Use the navigation buttons (see chap ) to enter the component name (max. 11 characters). 5. Confirm by pressing the PRINT button. The display to enter the quantity appears. 6. Use the navigation buttons (see chap ) to enter quantity. 70 ALT_B-PLT_A-PLT_F-BA-e-1333

71 7. Confirm by pressing the PRINT button. The input of the minus-tolerance is displayed. 8. Enter the negative tolerance value: ex.: -10 % 9. Confirm by pressing the PRINT button. The input of the plus-tolerance is displayed. 10. Enter the positive tolerance value: ex.: 5 % 11. Confirm by pressing the PRINT button 12. To enter more components (max. 20) repeat step 3 11 respectively. 13. Once having entered all components, use the ON/OFF button to exit the formula entry mode. Back to weighing mode, press ON/OFF button anew. ALT_B-PLT_A-PLT_F-BA-e

72 Invoke and work off the recipes After invoking a stored recipe (see chap ) the balance will be ready at once for weighing the components. Name and nominal value, tolerance and multiplication factor of the respective component are displayed. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Formula. Confirm by pressing the PRINT button. Receipt 00, or the most recently entered recipe will appear or (Example) Use navigation buttons to select the required recipe. Acknowledge using PRINT button, the first component and its nominal value as well as the negative and the positive tolerance value are displayed. Using the navigation buttons, all components including their nominal value and tolerance values can be displayed. Select component and confirm by the PRINT button, the entry of the multiplication factor will be displayed 72 ALT_B-PLT_A-PLT_F-BA-e-1333

73 Use the navigation buttons to enter the required multiplication factor. 1 = simple receipt quantity 2 = double receipt quantity 3 = triple receipt quantity etc. Use the PRINT button to confirm the selected factor: Example for factor 1 1 Tolerance value 2 Total weight of all components 3 Nominal value of the component 4 Total weight of all components 5 Displaying tolerance Overview tolerance display: Ex.: tolerance % to +5.0 % Weighed good below nominal value Weighed good = nominal value Weighed good above nominal value Ex.: without tolerance entry: Weighed good below nominal value Weighed good = nominal value Weighed good above nominal value ALT_B-PLT_A-PLT_F-BA-e

74 The display for weighing the first component appears. Tare when using a weighing container. Start weighing. When the nominal value is reached, right next to the capacity display OK will appear. If the nominal value is not reached (-) or exceeded (+), Err 10 will appear on the display after pressing the PRINT button. Correct the poured quantity. If the nominal weight is reached, press PRINT button. Wait appears shortly followed by Tare. Then the display passes to W=0 and the display for weighing the second component appears. Weigh-in the displayed nominal value of the second component. 74 ALT_B-PLT_A-PLT_F-BA-e-1333

75 After weighing and confirming the last component, the total weight (TOT:) of all components will be displayed and printed automatically. Printout example (KERN YKB-01N): :14:57 Cake Name receipt g Weighing 1. component Salt Name 1. component g Weighing 2. component Sugar Name 2. component g Weighing 3. component ABC Name 3. component T = g Total weight Back to formula mode, press the ON/OFF button and start the next recipe. Back to weighing mode, press ON/OFF button anew. ALT_B-PLT_A-PLT_F-BA-e

76 Example for factor 2: Call-up the required recipe as specified above Acknowledge using PRINT button, the first component and its nominal value as well as the negative and the positive tolerance value are displayed. Using the navigation buttons, all components including their nominal value and tolerance values can be displayed. Select component and confirm by the PRINT button, the entry of the multiplication factor will be displayed Use the navigation buttons to enter the multiplication factor 2. Use the PRINT-button to confirm the selected factor: Now the double quantity ( g) appears as nominal value. Start weighing. When the nominal value is reached, right next to the capacity display OK will appear. 76 ALT_B-PLT_A-PLT_F-BA-e-1333

77 If the nominal weight is reached, press PRINT button. Wait appears shortly followed by Tare. Then the display passes to W=0 and the display for weighing the second component appears. Now the nominal value is g. Start weighing. When the nominal value is reached, right next to the capacity display OK will appear. After weighing and confirming the last component, the total weight (TOT:) of all components will be displayed and printed automatically. ALT_B-PLT_A-PLT_F-BA-e

78 Back to formula mode, press the ON/OFF button and start the next recipe. Back to weighing mode, press ON/OFF button anew. 78 ALT_B-PLT_A-PLT_F-BA-e-1333

79 12.4 Check weighing In checkweighing an upper and a lower limit value can be established to ensure that the weighed goods are exactly within the established tolerance limits. The tolerance mark ( ) and an acoustic signal (selectable) show, if the weighed material is within the two tolerance limits. Display of the results 1. Lower and upper limit value 0 Tolerance marker Tone Assessment no Load exceeds specified tolerance yes Load within specified tolerance no Load below specified tolerance 2. Lower limit value > 0 and upper limit value = 0 Tolerance marker Tone Assessment yes Weighed goods > lower limit value no Weighed goods lower limit value 3. Lower limit value = 0 and upper limit value > 0 Tolerance marker Tone Assessment no Weighed goods > upper limit value yes Weighed goods upper limit value ALT_B-PLT_A-PLT_F-BA-e

80 Settings In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Checkweighing. Press PRINT button to confirm, the display for entering the lower limit value will appear. Use the navigation buttons (see chap.2.2.1) to enter the lower limit value, e.g g. Press PRINT button to confirm, the display for entering the upper limit value will appear. Use the navigation buttons (see chap.2.2.1) to enter the upper limit value, e.g g. Confirm using the PRINT button, the display to adjust the signal tone appears. Use the MENU-button to select the desired setting On: Acoustic signal switched on Off: Signal tone switched off Confirm by pressing the PRINT button. From now the balance is in checkweighing mode. 80 ALT_B-PLT_A-PLT_F-BA-e-1333

81 Start tolerance check Tare when using a weighing container Put on goods to be weighed, tolerance control is started Load below specified tolerance Load within specified tolerance Load exceeds specified tolerance When an optional printer is connected, the displayed value can be edited using PRINT. Printout examples (KERN YKB-01N): Load below specified tolerance Load within specified tolerance Load exceeds specified tolerance :14: :14: :14:57 Lim.1 : g Lim.1 : g Lim.1 : g Lim. 2 : g Lim. 2 : g Lim. 2 : g Weight : 8,900 g Weight : g Weight : 11,700 g TEST : KO! --- TEST : OK TEST : KO! +++ Return to weighing mode Press the ON/OFF key ALT_B-PLT_A-PLT_F-BA-e

82 12.5 Percent determination Percent determination allows weight display in percent, in relation to a reference weight Entering the reference weight by weighing In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Percent weigh.. Confirm with the PRINT button, the currently set mode will be displayed. Use the navigation buttons to select setting Automatic. If using a weighing container, put this before pressing the PRINT button. The taring process is automatically started. Press the PRINT key. Place the reference weight (=100 %) and press the PRINT button. As soon the weighing value is stable, the determined weight will be taken over as reference (100%). From now the balance is in percent determining mode. Place weighed goods, the result display will appear. W% Weight of the sample in percentage W Weight of the sample in grams REF: Reference weight (100%) When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): :14:57 Perc % Weight of the sample in percentage Weight: g Weight of the sample in grams Refer.: g Reference weight (100%) 82 ALT_B-PLT_A-PLT_F-BA-e-1333

83 Numeric entering of the reference weight In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Percent determin.. Confirm with the PRINT button, the currently set drying mode will be displayed. Use the navigation buttons to select setting Manual. Confirm by pressing the PRINT button. Use the navigation buttons (see chap ) to enter the reference weight (100 %) in grams. Confirm input by pressing the PRINT button. From now the balance is in percent determining mode. Place weighed goods, the result display will appear. W% Weight of the sample in percentage W Weight of the sample in grams REF: Reference weight (100%) When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): :14:57 Perc % Weight of the sample in percentage Weight: g Weight of the sample in grams Refer.: g Reference weight (100%) Return to weighing mode Press the ON/OFF key ALT_B-PLT_A-PLT_F-BA-e

84 12.6 Animal weighing function The animal weighing function can be applied for busy weighings. During a defined period the mean value of the weighing results is formed. The more unquiet the weighed item, the longer the measuring time should be selected. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item Animal weigh.. Confirm with the PRINT button, the currently set measuring time will be displayed. Use the navigation buttons to select the wanted measuring time (5 90 s) and confirm with PRINT button. Put upon weighing goods and press the PRINT button. In the display runs a Countdown of the set measuring time. The average value of the weighing results is displayed and remains displayed on the screen. When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): :14:57 Time = 20 sec Measuring time A: g Weighing result For other weighing procedures press ON/OFF button 1x Return to weighing mode: Press the ON/OFF button 2x 84 ALT_B-PLT_A-PLT_F-BA-e-1333

85 12.7 Peak value function This function displays the highest load value (peak value) of a weighing. The peak value remains in the display until it will be deleted. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select menu item Maximum load. Confirm using PRINT button, the taring process is automatically started. Tare will be shortly displayed. From now on the balance is in peak value mode. Load weighing pan. The maximum load value is displayed. The peak value remains in the display until the TARE button is pressed. Then the balance is ready for further measurements. When an optional printer is connected, the displayed value can be edited using PRINT. Printout example (KERN YKB-01N): :14:57 Max.: g Peak value Return to weighing mode: Press the ON/OFF key. ALT_B-PLT_A-PLT_F-BA-e

86 12.8 GLP function (Good laboratory practice) In the GLP settings, information is defined, which will be edited in the measurement records. In weighing mode press MENU button. The master menu will be displayed. Use the navigation buttons to select the menu item GLP.. Confirm by pressing the PRINT button. The display to enter the balance identification number appears. Use the navigation buttons (see chap ) to enter the balance ID (max. 18 characters). Confirm by pressing the PRINT button. The display for entering the user ID appears. Use the navigation buttons (see chap ) to enter the user ID (max. 18 characters). Confirm by pressing the PRINT button. The display for entering the project ID appears. Use the navigation buttons (see chap ) to enter the project ID (max. 18 characters). To save all the information press the PRINT button and keep it pressed until the acoustic signal gets mute. The balance returns automatically into weighing mode. 86 ALT_B-PLT_A-PLT_F-BA-e-1333

87 For GLP conformant printouts activate the menu setting PRINT button_glp, see chap Printout example (KERN YKB-01N): :14:57 Balance ID: TEST 1 User ID: Miller Project ID: 789 G.L.P. Parameter Weight: Signature: g Weighing data G.L.P. Parameter ALT_B-PLT_A-PLT_F-BA-e

88 13 Data output RS 232C RS232C The following conditions must be met to provide successful communication between the weighing balance and the printer. Use a suitable cable to connect the weighing balance to the interface of the printer/pc. Faultless operation requires an adequate KERN interface cable (optional). The baud rates of balance and printer must match (see chap.11.3). In the setup menu (see chap.11.2) activate the desired data output, you can select - Continuous data output - Output of stable weighing values after pressing the PRINT button - GLP conformant printouts after pressing the PRINT button 13.1 Technical data 8-bit ASCII Code 8 data bits, 1 stop bit, no parity bit Baud rate optional from Baud 13.2 Pin allocation of balance output plug Pin 1 Power +5V Pin 2 Pin 3 Pin 4 Pin 5 Pin 4-6 Tx Signal Rx Signal busy signal GND Transmission to PC 88 ALT_B-PLT_A-PLT_F-BA-e-1333

89 13.3 Interface Balance PC 25-pole Balance PC RS232C RS232C RS2 32C RS232C 4 20 Balance PC 9-pole Balance PC RS232C RS2 32C RS232C 4 4 Balance - printer Balance Printer Input data Busy signal GND ALT_B-PLT_A-PLT_F-BA-e

90 13.4 Format Data transfer The data set consists of the following 14 characters: 1. Character Sign -/ blank (weighing value) 2-9. Character Weight or other data Character Weighing unit 13. Character Stability display 14. Character Carriage return 15. Character Line feed Weighing mode (continuous output or output after pressing the PRINT button) r Character Weight Weighing unit Stability CR LF 90 ALT_B-PLT_A-PLT_F-BA-e-1333

91 14 Error messages ERR01 ERR02 ERR03 ERR04 ERR05 ERR06 ERR07 ERR08 UNLOAD : CAL But Weight value instable or zeroing not possible. Check the environmental conditions. Adjustment error, e.g. instable environmental conditions Adjustment error e.g. incorrect adjustment weight} Piece weight too small/instable Data transfer not possible, as weighing value is instable. Check the environmental conditions. Weighing value in density determining mode instable. Check the environmental conditions. Weighing value in percentage determining mode instable. Check the environmental conditions. Error at internal adjustment Weighing value in formula mode instable. Check the environmental conditions. Weighing range not achieved. Check position of the weighing pan. Adjust balance. Weighing range exceeded, placed load exceeds the capacity of the balance. Unload the balance. Weighing range not reached, e.g. weighing pan not in place ALT_B-PLT_A-PLT_F-BA-e

92 15 Service, maintenance, disposal Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage Clean Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device. Polish with a dry soft cloth. Loose residue sample/powder can be removed carefully with a brush or manual vacuum cleaner. Spilled weighing goods must be removed immediately Service, maintenance The appliance may only be opened by trained service technicians who are authorized by KERN. Ensure that the balance is regularly calibrated, see chap. Testing instruments control Disposal Disposal of packaging and appliance must be carried out by operator according to valid national or regional law of the location where the appliance is used. 92 ALT_B-PLT_A-PLT_F-BA-e-1333

93 15.4 Instant help In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning. Fault Possible cause The displayed weight does not glow. The balance is not switched on. The mains supply connection has been interrupted (mains cable not plugged in/faulty). Power supply interrupted. The displayed weight is permanently changing Draught/air movement Glass doors not closed Table/floor vibrations Weighing pan has contact with other objects. Electromagnetic fields / static charging (choose different location/switch off interfering device if possible) The weighing result is obviously incorrect The display of the balance is not at zero Adjustment is no longer correct. The balance is on an uneven surface. Great fluctuations in temperature. Warm-up time was ignored. Electromagnetic fields / static charging (choose different location/switch off interfering device if possible) Should other error messages occur, switch balance off and then on again. If the error message remains inform manufacturer. ALT_B-PLT_A-PLT_F-BA-e

94 16 Declaration of conformity EC-Konformitätserklärung EC- Déclaration de conformité EC-Dichiarazione di conformità EC- Declaração de conformidade EC-Deklaracja zgodności D Konformitätserklärung EN Declaration of conformity CZ Prohlášení o shode E Declaración de conformidad F Déclaration de conformité I Dichiarazione di conformitá NL Conformiteitverklaring P Declaração de conformidade PL Deklaracja zgodności RUS Заявление о соответствии KERN & Sohn GmbH D Balingen- Frommern Postbox info@kern-sohn.de Declaration of conformity Phone: 0049-[0] Fax: 0049-[0] Internet: EC-Declaration of -Conformity EC-Declaración de Conformidad EC-Conformiteitverklaring EC- Prohlášení o shode EC-Заявление о соответствии Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nachstehenden Normen übereinstimmt. We hereby declare that the product to which this declaration refers conforms to the following standards. Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu s níže uvedenými normami. Manifestamos en la presente que el producto al que se refiere esta declaración está de acuerdo con las normas siguientes Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente déclaration, est conforme aux normes citées ci-après. Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate. Wij verklaren hiermede dat het product, waarop deze verklaring betrekking heeft, met de hierna vermelde normen overeenstemt. Declaramos por meio da presente que o produto no qual se refere esta declaração, corresponde às normas seguintes. Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy, jest zgodny z poniższymi normami. Мы заявляем, что продукт, к которому относится данная декларация, соответствует перечисленным ниже нормам. Electronic Balance: KERN ALT_B, PLT_A, PLT_F EU Directive Standards 2004/108/EC EN (2006) EN (2006) EN (1995) + A1 (2001) + A2 (2005) 2006/95/EC EN (2001) Datum Date Ort der Ausstellung Place of issue Signatur Signature Balingen Albert Sauter KERN & Sohn GmbH Geschäftsführer Managing director KERN & Sohn GmbH, Ziegelei 1, D Balingen, Tel. +49-[0]7433/ Fax +49-[0]7433/ , info@kern-sohn.com, Internet: 94 ALT_B-PLT_A-PLT_F-BA-e-1333