Valco Instruments Co. Inc.D3.P65Rev. 9/07Printed in USAPulsed DischargeDetector ModelsD-3-I-HP andD-3-I-7890Instruction Manual® ®Europe, Asia, and Afr

6InstallationGeneral Precautions •Do not use plastic/polymer or copper tubes for gas handling andinterconnectons. Use only stainless steel tubing wi

7Agilent Technologies7890AGC SystemMODEL D3DETECTORFigure 2: A D3 detector in the “Back” position on a 7890ACAPTIVE SCREWS (4)COLUMN INLETELECROMETER

8InstallationCAUTION: A D-3-I-HP will not work on a 7890 GC, and aD-3-I-7890 will not work on a 6890. If you are not surewhich model you have, call t

9Installation6. Press the <Config> key, then press <Back det> or <Front Det>, corre-sponding to the location where the PDD will be i

10Installation11. Scroll to select the second line and press <Enter>. The display will read:CAUTION: Instrument power must be turned offand bac

11InstallationGas ConnectionsRemember these three points discussed earlier: (1) all surfaces that contactthe gas stream must be glass or stainless ste

127. Open the cylinder valve to pressurize the regulator once again. Close thevalve and observe the needle of the high pressure gauge for 15 minutes.

13Initial Power-UpCAUTION: Always make sure that discharge gas isflowing before heating and powering up the detector.1. Before installing the column,

14Capillary Column ConnectionIf the capillary column adapter is installed in the column inlet:1. Make a mark on the column 10.3 cm from the end.2. Rem

153. Set aside the 1/8" wrench and completely remove the adapter from thecolumn inlet.4. Screw the packed column adapter into the column inlet by

This page intentionally left blank for printing purposes

16Mode Selection and SetupHelium Ionization ModeSince the PDHID mode provides a better indication of the cleanliness andthe integrity (leak tightness)

17Mode Selection and SetupAr-PDPIDChanging the discharge gas from helium to a mixture of 2% argon inhelium changes the photon energy level from the 17

18TroubleshootingHigh Background CurrentLow SensitivityPurple/bluePinkDisconnect the columnand cap the column inletBaseline current is still high(>

19High Noise LevelIf the noise lievel is high:1. See if it improves with the GC fan turned off.2. Check the column insertion position (10.3 cm for cap

20WarrantyThis Limited Warranty gives the Buyer specific legal rights, and a Buyermay also have other rights that vary from state to state. For a peri

21Detector Performance LogIn addition to the occasions indicated in the Comments area of the table below (see Initial Power-Up,page 13), the standing

Table of ContentsIntroductionDescription and Operating Principles ... 1Safety Notes and Infor

This page intentionally left blank for printing purposes

1IntroductionDescription and Operating PrincipleThe D3 is a non-radioactive pulsed discharge ionization detector (PDID), withmodels available for “plu

2Safety Notes and InformationSymbolsATTENTIONRefer to the manual.Installation CategoryThis equipment has been designed for installation category (over

3Components of the Detector SystemComponents of the detector system are listed in Table 1 below. Check thecontents of the packages to verify that eve

4System RequirementsComponents Not Included with the Detector System • Helium (99.999% purity) and other support gases • Ultra high purity grade gas

5IntroductionedoMrotceteDDIHDPDIPDP-rADIPDP-rKDIPDP-eXsagegrahcsiDmuileHeHnirA%2eHnirK%5.1eHnieX%8.0sagreirraCmuileH*****Gas Specifications** Any gas