RTD temperature sensor omnigrad S -TST 266

Transcription

1 Technicl informtion TI 249T/02/en RTD temperture sensor omnigrd S -TST 266 Thermometer with EEx d certifiction Lmintion nipple nd/or 3 elements coupling Thermowell mde from metl br The Omnigrd S TST 266 is n industril thermometer with Pt 100 thermoresistnce, developed for the use in the chemicl, petrochemicl nd energy industries but suitble lso for other generic pplictions. The TST 266 is supplied with EEx d certifiction, in compince with Europen stndrds EN nd EN 50018, nd is therefore prticulrly suitble lso for industril res with potentilly explosive environments. The unit is usully fitted on pipes or tnks by mens of threded or flnged process connection. The TST 266, which is vilble in severl stndrd versions nd different configurtions, cn lso be configured with specific dimensions nd chrcteristics depending on process requirements. Fetures nd benefits Severl types of process connection Thermowell vilble in severl mterils Mteril certifiction in ccordnce with 3.1.B, NACE or PMI Trnsmitters with 2-wire technology (PCP ma, HART, PROFIBUS- PA ) Customisble immersion length Thermowells complint with stndrd ENI nd Montedison, mde of br, lso of significnt length Hed/thermowell connection fitting in SS 304 (nipple + 3 elements coupling + nipple) Explosion-proof enclosure with EEx d certifiction (explosion-proof) nd lmintion coupling on the insert Minerl oxide replceble insert (MgO) Pt 100 sensing element with clss B nd A (DIN EN 60751)

2 omnigrd S TST 266 Ares of ppliction The TST 266 cn lso be used in generic industril pplictions but is prticulrly suitble for EEx d certified ppliction like: chemicl industry petrochemicl industry energy industry gs processing industry. Function nd system design Mesuring principle Equipment rchitecture In RTD (Resistnce Temperture Detector) thermometers, the sensing element consists of n electricl resistnce with vlue of 100 ohm t 0 C (clled Pt 100, in complince with stndrd DIN EN 60751) which increses t higher tempertures ccording to coefficient chrcteristic of the resistor mteril (pltinum). In industril thermometers complint with the DIN EN stndrd, the vlue of this coefficient is α = 3.85*10-3 C -1, clculted between 0 nd 100 C. The TST 266 thermometer with thermoresistnce comprises: n EEx d certified luminium housing n insert with thermoresistnce Pt 100, insulted with minerl oxide (MgO), with oversheth nd terminls on cermic support lmintion nipple nd 3 elements coupling thermowell mde from br with threded or flnged process connection. Dimensions re determined s follows (fig. 1): N = length of the hed/thermowell connection fitting A = totl length of the thermowell U = immersion length of the thermowell T = length of the extension neck of the thermowell ØDf = dimeter of the internl hole of the thermowell ØD1 = dimeter of the extension neck of the thermowell ØQ1 = dimeter of the re below the thermowell process connection ØQ2 = dimeter of the lower side of the thermowell. N ØD1 T U N ØD1 A ØQ1 T A ØQ1 ØDf ØQ2 Extension type L U ØDf ØQ2 Extension type LUN TST266_G_dd_07_en_04 Fig. 1: Overll dimensions 2 Endress+Huser

3 omnigrd S TST 266 Mteril Weight Housing: treted nd pinted luminium lloy. Mesuring insert: externl sheth in SS 316L/ Hed/thermowell connection: SS 304/ Thermowell: SS 316/1.4401, SS 316L/1.4404, Hstelloy C276/2.4819, Monel 400/2.4360, Inconel 600/ From 1.5 to 5 Kg for stndrd options. Electronics The required type of output signl cn be obtined by choosing the correct hed-mounted trnsmitter. Endress+Huser supplies "stte-of-the-rt" trnsmitters (the itemp series) built in 2-wire technology nd with 4 20 ma output signl, HART or PROFIBUS-PA. All trnsmitters cn be esily progrmmed using personl computer nd the RedWin 2000 public domin softwre (for trnsmitters 4 20 ma nd HART ) or the Commuwin II softwre (for PROFIBUS-PA trnsmitters). HART trnsmitters cn lso be progrmmed with the hnd-held operting module DXR 275 (Universl HART Communictor). For more detiled informtion on the trnsmitters, see the relted documenttion (codes TI t the end of this document). If no hed trnsmitter is used, it is lso possible to connect the thermoresistnce to remote trnsmitter DIN-ril. Performnce Operting conditions Ambient temperture Metl hed with terminl block nd without trnsmitter Metl hed without terminl block nd with trnsmitter Process temperture Sme of mesurement rnge (see below) C C Mximum process pressure The pressure vlues tht the thermowell cn withstnd t different tempertures, re shown in the following grphs, which cn be used for some reference configurtions: Grfic_g_gd_05_en_08 Endress+Huser 3

4 omnigrd S TST 266 Grfic_g_gd_05_en_09 Fig. 2: Pressure/Temperture grphs Mximum flow rte The mximum flow rte tolerted by the thermowell decreses s the immersion length increses (U). The methods used to verify the resistnce of thermowells with pressure, temperture nd flow rte dt cn lso be complint with those indicted in stndrd ASME/ANSI PTC For ssistnce on resistnce tests, plese contct the E+H Customer Service Deprtment. Shock nd vibrtion resistnce According to DIN EN g pek / Hz Accurcy Mximum probe error cl. B 3σ = ItI cl. A 3σ = ItI (ItI=bsolute temperture vlue in C) Tolernce Trnsmitter mximum error See the corresponding documenttion (codes re shown t the end of this document). 1/3 DIN B ( C) Grfic_g_gd_05_en_04 Mesurement rnge C Response time Tests in wter t 0.4 m/s (ccording to DIN EN 60751; temperture vrition from 23 to 33 C), only on the RTD thermometer insert: t s t 90 8 s Insultion Insultion resistnce between the terminls nd the probe sheth 100 MΩ t 25 C (in ccordnce with DIN EN 60751, test voltge 250 V) 10 MΩ t 300 C Self heting Negligible when the E+H itemp trnsmitters re employed. 4 Endress+Huser

5 omnigrd S TST 266 Instlltion The Omnigrd S TST 266 cn be instlled on pipes or tnks by mens of threded or flnged connections. The counterprts for process connections nd gskets, when required, re not supplied with the sensor nd must be purchsed seprtely by the user. The immersion length must tke into ccount ll the prmeters of the thermometer nd the process to mesure. If the immersion is too low, n error my be generted in the temperture recorded due to the lower temperture of the process fluid ner to the wlls nd het trnsfer, which tkes plce through the sensor stem. The incidence of such n error cn be not negligible if there is big difference between the process temperture nd the mbient temperture. To prevent mesuring errors of this kind, it is dvisble to use thermowells with smll dimeter nd n immersion length (U) of t lest mm. In smll section ducts the tubing s xis must be reched nd preferibly slightly exceeded by the tip of the probe (see fig. 3A). Insultion of the outer prt of the sensor reduces the effect produced by low immersion. Alterntively, it is lso possible to dopt tilted instlltion (see fig. 3B-3D). As fr s corrosion is concerned, the bse mteril for prts in contct with the fluid is ble to withstnd the most common corrosive gents up to the highest tempertures. Even the nipples nd 3 elements coupling supplied with the connection fitting of the instrument re ble to withstnd wide rnge of ggressive substnces. For further informtion on specific pplictions, contct the E+H Customer Service Deprtment. Disssembled components of the sensors must be ressembled with the recommended clmping torques in order to ensure the pproprite IP protection clss within the sensor-housing coupling. A U C D B TST264_g_id_07_xx_02 Fig. 3: Instlltion on pipes nd tnks by mens of flnged or threded process connections Endress+Huser 5

6 omnigrd S TST 266 System components Housing The protection housing, commonly referred to s "connection hed"; is used to contin nd protect the terminl block or the trnsmitter, nd to join the electric connections to the mechnicl component. The hed used for the TST 266 is complint with DIN (form B) nd EN 50014/50018 stndrds (EEx certifiction for explosion-proof instruments). The mtching of the hed with the extension below the hed nd the cover (threded) ensures n IP66 clss of protection. The hed lso hs chin to connect the body to the cover, which fcilittes the use of the instrument during the mintennce on systems. The single or double electricl cble input hs M20x1.5, 1/2 NPT or 3/4 NPT threding. Hed trnsmitter Avilble hed trnsmitters include (see lso section "Electronics"): TMT 180 TMT 181 TMT 182 TMT 184 PCP 4 20 ma PCP 4 20 ma Smrt HART PROFIBUS-PA. The TMT 180 nd TMT 181 re trnsmitters tht cn be progrmmed by mens of PC. The TMT 180 is lso vilble in n enhnced ccurcy version (0.1 C vs. 0.2 C) with n operting temperture rnge of C. The TMT 180 cn lso hve fixed mesurement rnge (the limit vlues of the rnge must be specified by the customer in order phse). The TMT 182 output consists of 4 20 ma nd HART superimposed signls. Ø33 Ø44 1 Ø Ø 6.5 Ø Ø TMT181_g_gd_06_IT_02 Fig. 4: TMT In the TMT 184, with PROFIBUS-PA output signl, the communiction ddress cn be set vi softwre or by mens of mechnicl dip-switch (the configurtion must be specified by the customer in order phse). Ø33 Ø44 1 Ø Ø Ø 6.5 Ø TMT184_g_gd_06_IT_01 Fig. 5: TMT Endress+Huser

7 omnigrd S TST 266 Extension neck The extension neck is the prt between the thermowell nd the trnsmitter housing. To prevent the process temperture from overheting the re of the trnsmitter, specil extension "neck" is inserted between the sensor, exposed to high temperture processes, nd the trnsmitter. This enbles to limit the operting temperture of the trnsmitter. The neck is usully constituted by tube ssembled to hydrulic hrdwre (nipples or joints) tht is suitble to llow the djustment of the sensor to the thermowell. The stndrd lengths (N) nd the versions of the extension neck cn be selected mong the following options: 52 mm (only 1/2 NPT, type L) 148 mm (nipple+3 elements coupling+nipple, type LUN). Threded thermowell connections Type Thred Length N (mm) C (mm) Detil Type of neck 52 L* ncklxx_g_gd_15_xx_01 Mle 1/2 NPT LUN ConNPT_G_dd_09_XX_01 ncklun_g_gd_15_xx_02 " Attention! * This neck is vilble only for 1/2 NPT threds "LUN" connections enble to orient the housing of the trnsmitter. As illustrted by the chrt in figure 6, the length of the sensor + thermowell extension my influence the temperture in the hed. It is necessry tht this temperture is kept within the limit vlues defined in the prgrph "Operting conditions". In ddition to the stndrd versions listed bove, it is lso possible to order the extension neck by specifying the desired length (see Sles structure chrt). 30 C Hed heting Neck extension length Process temperture mm 570 C 400 C 220 C Grfic_g_gd_05_en_12 Fig. 6: Heting of the hed cused by the process temperture Process connection Stndrd process connections differ in tht they cn be threded or flnged: threded connections in the sme mteril of the thermowell: 3/4 NPT, 1 NPT. flnged connections in SS 316 or A 105: slip-on 1 ANSI 150, 300, 600 RF slip-on 1 1/2 ANSI 150, 300, 600 RF slip-on 2 ANSI 300, 600 RF. Flnges with stndrd finishing AARH, is bolted nd welded to the rer of the thermowell neck. On request, it is possible to select lso different mterils, finishings nd connections. Endress+Huser 7

8 omnigrd S TST 266 Thermowell The thermowell is the component of the TST 266 tht must tolerte most of the mechnicl stress trnsmitted by the process. It is mde from round br nd supplied in different mterils nd dimensions, ccording the chemicl/physicl chrcteristics of the process: corrosion, temperture, pressure nd speed of the fluid. The thermowell consists of three prts: the extension neck (indicted s T), usully with cylindricl shpe (nd stndrd dimeters of 30 or 35 mm nd lengths of 70/100 mm), represents the externl prt of the thermowell nd is connected with the hed of the probe by mens of neck (usully nipple) the immersed prt (identified s U), with conicl or cylindricl shpe (the stndrd dimeter of the re below the fitting is 20 or 25 mm), is situted next to the process connection in direct contct with the process fluid the threded or flnged process connection represents the prt inserted between the extension nd the immersed prt nd gurntees the mechnicl nd hydrulic seling of the thermometer nd plnt. The externl finishing of the thermowell stem is vilble with stndrd vlue of R < 1.6 µm (different finishes re vilble on request). Fig. 7: Thermowell with threded or flnged process connection WELLxx_g_dd_13_in_02 # Wrning! The totl stndrd length (A) of the thermowell must never exceed 1300 mm (tht represents the mximum drilling limit; higher lengths re vilble only on request). Probe The mesuring probe (generlly Pt 100) of sensor TST 266 consists of 6 mm dimeter thermometric insert (TET 300) whose stem is mde in MgO compressed by SS 316L/ (lso clled minerl insulted cble). To improve het trnsmission, the insert tip is pushed, by mens of spring system, to the inside bottom of the thermowell (to order seprtely). The insert is lwys supplied with lmintion nipple nd/or 3 elements coupling. In cse of spre prts, length ML must be clculted depending on the thermowell totl length, using the formul: ML = A-11. ½ NPT M ½ NPT M ML Type L Ø6 ML Ø6 Type LUN TET300_g_gd_05_en_08 Morset_g_gd_07_en_02 Fig. 8: Mesuring probe 8 Endress+Huser

9 omnigrd S TST 266 Certifictes & Approvls Ex pprovl Certificte CESI 03 ATEX 114, 1/2 GD IIC EEx d T5/T6. PED pprovl The Pressure Equipment Directive (97/23/CE) is respected. As prgrph 2.1 of Article 1 is not pplicble to this kind of instrument, the mrking 4 is not mndtory for TST 266 models used for generic pplictions. Mteril certifiction The mteril certifiction cn be selected directly in the sles structure nd is vilble in different typologies. Certificte 3.1.B includes sttement tht contins ll the documents relted to the mteril employed for the mnufcture of ech thermowell, long with mrking, consisting in code punched on the thermowell, tht gurntees the trcebility of the product. In the sles structure re lso vilble other certifiction relted to mterils which integrte the 3.1.B: 3.1.C certifiction NACE MR 0175 certifiction PMI certifiction. Further detils Mintennce The TST 266 does not require specific mintennce. Delivery time For smll orders (5 10 units) nd stndrd options, the delivery time is 10 working dys. Endress+Huser 9

10 omnigrd S TST 266 Ordering informtion Sles structure TST 266 Neck length N, mteril nd type of connection 1 52 mm SS304 type L 1/2 NPT-M mm SS304 type LUN 1/2 NPT-M 9 Extension length to specify Type nd clss of insert H 1 Pt 100 clss A, 3 wires L 2 Pt 100 clss A, 3 wires Y Type nd clss to specify Type of electricl connection 2 Flying wires 3 Cermic terminl block Thermowell dimensions: est. T, dim. D1, Df, Q1, Q2, finishing 1 70 mm = T, D1 = 30 mm, Df = 7 mm, Q1 = 20 mm, Q2 = 14 mm, finishing 1,6 micron mm = T, D1 = 35 mm, Df = 7 mm, Q1 = 25 mm, Q2 = 18 mm, finishing 1,6 micron 9... mm = T, D1 =... mm, Df =... mm, Q1=... mm, Q2 =... mm, finishing to specify Immersion length U ( mm) X... mm immersion length to specify Y... mm specil immersion length Thermowell mteril C Thermowell mteril AISI 316-W D Thermowell mteril AISI 316L-W H Thermowell mteril Hstelloy C276-W K Thermowell mteril Inconel 600-W M Thermowell mteril Monel 400-W Y Thermowell mteril to specify Process connection 1 Threded 3/4 NPT-M 2 Threded 1 NPT-M 3 Slip-on 1 ANSI 150 RF A Slip-on 1 ANSI 150 RF SS Slip-on 1 ANSI 300 RF A Slip-on 1 ANSI 300 RF SS Slip-on 1 ANSI 600 RF A Slip-on 1 ANSI 600 RF SS 316 A Slip-on 1 1/2 ANSI 150 RF A 105 B Slip-on 1 1/2 ANSI 150 RF SS 316 C Slip-on 1 1/2 ANSI 300 RF A 105 D Slip-on 1 1/2 ANSI 300 RF SS 316 E Slip-on 1 1/2 ANSI 600 RF A 105 F Slip-on 1 1/2 ANSI 600 RF SS 316 Q Slip-on 2 ANSI 300 RF A 105 R Slip-on 2 ANSI 300 RF SS 316 S Slip-on 2 ANSI 600 RF A 105 T Slip-on 2 ANSI 600 RF SS 316 Y Process connection to specify Flnge finishing 1 Finishing not requested 2 Stndrd finishing AARH 9 Finishing to specify Certifictions A Not requested G 3.1.B EN10204, with stmping, for wetted prts E 3.1.B EN10204, + NACE MR 0175 C 3.1.C EN10204, F 3.1.B EN10204, + PMI Y Certifiction to specify 10 Endress+Huser

11 omnigrd S TST 266 Hed cble entry A Hed cble entry: single 1/2 NPT C Hed cble entry: double 1/2 NPT B Hed cble entry: single 3/4 NPT D Hed cble entry: double 3/4 NPT E Hed cble entry: single M20x1.5 F Hed cble entry: double M20x1.5 Built-in hed trnsmitter 0 Without built-in hed trnsmitter 2 Fixed rnge TMT 180-A21, from...to... C - ccurcy 0.2K, spn limit: C 3 Fixed rnge TMT 180-A22, from...to... C - ccurcy 0.1K, spn limit: C 4 Progrmmble TMT 180-A11, from..to... C - ccurcy 0.2K, spn limit: C 5 Progrmmble TMT 180-A12, from...to... C - ccurcy 0.1K, spn limit: C P Progrmmble TMT 181-A, from... o... C, PCP, 2-wire, insulted R Progrmmble TMT 182-A, from...to... C, HART, 2-wire, insulted S Progrmmble TMT 182-A, from...to... C, PROFIBUS-PA, 2-wire, insulted 1 Built-in hed trnsmitter THT1, to be ordered seprtely TST266- Complete order code Endress+Huser 11

12 Supplementry documenttion Generl technicl informtion on TST thermometers Temperture trnsmitter - itemp PA TMT 180 Temperture trnsmitter - itemp PCP TMT 181 Temperture trnsmitter - itemp HART TMT 182 Temperture trnsmitter - itemp PA TMT 184 Insert Pt Omnigrd TET 300 Sfety instruction for use in hzrdous re E+H Lbortory. Clibrtion certifictions for industril thermometers. RTD nd thermocouples TI 088T/02/en TI 088R/09/en TI 070R/09/en TI 078R/09/en TI 079R/09/en TI 226T/02/en XA 007T/02/z1 TI 236T/02/en Subject to modifiction Endress+Huser Gmbh+Co. KG Instruments Interntionl P.O. Box 2222 Colmrer Str. 6 D Weil m Rhein Germny Tel Fx info@ii.endress.com cl05 TI 249T/02/en/ FM+SGML 6.0