Print View CD Bipolar Discharge System. Model Variations. CD2000TypeA. Bipolar discharge unit with higher mixed air flow.

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1 Bipolar Discharge System Model Variations CD2000TypeA Bipolar discharge unit with lower mixed air flow CD2000TypeB Bipolar discharge unit with higher mixed air flow Page 1 of 7 Version: September 13, 2018

2 Description Fig.1:CD2000 ThebipolarcoronadischargeCD2000isusedinordertoneutralizethechargeofadustorliquidaerosoloreventoelectrically chargeit,asrequired.forthispurpose,acurrentissetonthepositiveandnegativehighvoltagesourcesohighthatitisstill fully conducted through the corona discharge generated at the tip in the corona chamber, but no(or few) sparks are generated. This current is programmed via the current limitation of the HV power supplies. The voltage limitation is set slightly higher than is necessary for the current determined, such that this current flows under all circumstances(temperature, condition of the electrode). The positive and the negative high voltage supplies and the are independent of one another and are independently adjustable. Functional principle Page 2 of 7 Version: September 13, 2018

3 Fig. 2: Functional principle of corona discharge Adustorliquidaerosolissuppliedattheaerosolinlet.Theparticlesinthisaerosolhavetobedischarged.Themixedairinlet isfedwithdrypressurizedair.themixedflowairispassedthroughtwoionizationchambers.inthesechamberstheairis enriched with ions from the corona discharge with positive and negative high voltage. The aerosol air stream and the mixed airenrichedwithionsaremixedinasmallmixingchamber.thechargesoftheparticlesintheaerosolareneutralizedbythe ionsinthemixedair.thistakesacertaintime.thatmeansthatthecompletedischargeonlytakesplaceinthevolumeafter CD2000outlet(e.ginthetubingsystemorintheupperpartofafilterholder).Anapproximatevalueforthedwelltimeis0.5 seconds. A satisfactory discharging effect was found in configurations that ensure a dwell time of at least 0.2 seconds. measurement data Page 3 of 7 Version: September 13, 2018

4 Fig. 3: Fractional separation efficiency with and without With a filter medium or filter(exception: Electret filter medium or Electret filter) the fractional separation efficiency is normally measured higher without a discharge unit than with one. Attention Manystandards,e.g.EN779forroomfilters,requiretheuseofadischargeunit. Page 4 of 7 Version: September 13, 2018

5 Benefits No operation license required for radioactive instruments Bipolar discharge through negative and positive ions Applicable for solid and liquid aerosols Robust design Simple operation Reliable function Low maintenance Reduces your operating expenses Page 5 of 7 Version: September 13, 2018

6 Datasheet Parameter Description Power consumption 50 W Powersupply V,50-60Hz Reporteddata Voltage:0-6000V =0-10V,power:0-1000µA =0-10V Aerosoloutletconnection Aerosolandfedmixedair,Ø outside =16mm,Ø inside =12mm Special features Positive and negative high voltages are provided by two independent power supplies, maximum voltage: ± 6000 V, maximum power: ± 1000 µa Volumeflow(suctionflow) 0-4m 3 /h Mixedairconnection Cleanedpressurizedair,typeA:Ø outside =8mm,Ø inside =6mm,typeB: Ø inside =13mm Operation principle Ionization with corona Mainsfuse F3,15A,250V Volumeflow(mixedair) TypeA:for2-18m 3 /h,typeb:for3-36m 3 /h Aerosolinletconnection Ø outside =8mm,Ø inside =6mm Page 6 of 7 Version: September 13, 2018

7 Applications Discharge of electrically charged aerosols Aerosol research Filter testing Palas GmbH Partikel- und Lasermesstechnik Greschbachstrasse Karlsruhe Germany Managing Partner: Dipl.-Ing.(FH) Leander Mölter Dr.-Ing. Maximilian Weiß Commercial Register: Mannheim HRB Place of Business: Karlsruhe USt-Id: DE St-Nr: /07832 Bank Data: BW-Bank Karlsruhe BIC: SOLADEST IBAN:DE Deutsche Bank Karlsruhe BIC: DEUTDESM660 IBAN:DE Contact: mail@palas.de Internet: Tel: +49(0) Fax: +49(0) Page 7 of 7 Version: September 13, 2018