Vici D-2-IM Manual do Utilizador

Valco Instruments Co. Inc.D2-IM.p65©2011 9/11Printed in USAPulsed DischargeDetectorModel D-2-IMInstruction ManualValco Instruments Co. Inc.800 · 367·

6IntroductionPDECDPDHIDMODE120160200804024028032036040010245122561286432168421ATTENUATIONDETECTOR TEMP.DISCHARGEZEROV ECDnA HIDPULSED DISCHARGE CONTRO

7ATTENUATED OUTPUT connectorNormally connected to a strip chart recorder. This output has an unattenuatedrange of 0 - 10V, and an internal signal r

8System RequirementsComponents Not Included with the Detector System • Helium (99.999% purity) and other support gases • Ultra high purity grade gas

9System RequirementsSpecificationsMains (line): 115/230 V~50/60 Hz, 175 VAFuse: 2 A, time-delay, 5 x 20 mmPressure: 6.9 kPa (1 psi) operating, 6.9 MPa

10System RequirementsGC Column SelectionTo prevent detector contamination, we stronglyrecommend disconnecting the column from thedetector during colum

11InstallationThe detector is usually mounted on top of the GC column oven. The cabling assupplied requires the discharge module to be located withi

12Gas ConnectionsRemember these three points discussed earlier: (1) all surfaces that contact thegas stream must be glass or stainless steel; (2) do

13CAUTION: Never use leak detecting fluids on any part ofthis system.Installing and Purging the Helium Purifier1. If the pressure regulator has a 1/8

14Connecting the Discharge Gas to the Detector1. If you are supplying the GC from the helium purifier, use the Valco tee (ZT1).Otherwise, use one of t

15InstallationElectrical ConnectionsCAUTION: Do not use a wrench to tighten the SMCconnectors on the bias and electrometer cables.Connections should b

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16InstallationInitial Power-Up1. If it is not already there, set the MODE switch on the front of the controller toPDHID.2. Set the discharge gas flow

17InstallationFrom this point, the standing current should be observed and logged after anysystem change. In addition, logging the standing current

18WarrantyThis Limited Warranty gives the Buyer specific legal rights, and a Buyer may alsohave other rights that vary from state to state. For a peri

19Detector Performance LogIn addition to the occasions indicated in the Comments area of the table below, (see Initial Power-Up, page16), the standing

Table of ContentsIntroductionDescription and Operating Principles ...

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1IntroductionDescription and Operating PrincipleThe pulsed discharge detector Model D-2-IM is a universal helium photoionizationdetector optimized for

2The PDHID response is universal except for neon, which has an ionization potentialof 21.56 eV. Since this potential is close to the energy of the He

3SafetyThis instrument has been designed and tested in accordance with the productsafety standard, EN61010. It has left the factory in a safe conditi

4Components of the Detector SystemComponents of the detector system are listed in Table 1. Check the contents ofthe packages to verify that everythin

5IntroductionTEMPERATURE control and indicatorSets the temperature (°C) of the detector heater block. The indicator is steadily onwhen maximum power