Vici TCD2 Manual de usuario

Valco Instruments Co. Inc.tcd2.p65Rev 4/12Printed in USAMicrovolume ThermalConductivity DetectorInstruction ManualValco Instruments Co. Inc.800 · 367·

6MAINS POWER connectorFor connection to 115/230 VAC source.CHART OUTPUT connectorNormally connected to a strip chart recorder. This output has an att

7System RequirementsComponents Not Included with the Detector System •Carrier gas (99.999% purity is recommended) •Ultra high purity grade gas press

82 13⁄16"5 5⁄8"1 1⁄4"3"6"1 1⁄2"1"Figure 5: Detector assembly mounting dimensionsHowever, while nitrogen as a carri

9CHANNELAVENTCHANNELBVENTCHANNELAINLET(gold ferrule)CHANNELBINLET(stainless ferrule)InstallationThe detector is usually mounted on top of the GC colum

10Gas ConnectionsRemember these three points discussed earlier: (1) all surfaces that contactthe gas stream must be glass or stainless steel; (2) do n

11Installing and Purging the Gas Regulator1. Make sure the on/off valve on the helium cylinder is completely closed.Screw the CGA fitting nut of the r

12InstallationColumn ConnectionTo prevent detector contamination, we strongly recom-mend disconnecting the column from the detector duringcolumn bakeo

13InstallationEZU1Used with 1/16" columnEZRU21Used with 1/8" columnZU1C with fused silica adapterColumn size.32 mm ID x .5 mm OD.25 mm ID x

14InstallationCHARTAB A-BOUTPUTSDETECTORSERIAL NO.Valco Instruments Co. Inc.MODEL NO.Valco Instruments Co. Inc.220VATTENUATED STRIPCHART OUTPUTCABL

15InstallationInitial Power-UpSince the TCD is a concentration-dependent detector, the lower the flowrate through the detector, the higher the sensiti

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16InstallationThe test chromatogram accompanying your TCD was obtained under thefollowing conditions:Sample: ~100 ppm blend in Helium balanceSample vo

17TroubleshootingTroubleshooting ChartProblem Possible Cause Refer to page:No signal Main or filament power switch off 4Filament temperature too low 4

18Detector Fault DeterminationElectrical faults in the detector are most easily discovered by makingresistance measurements between pins of the detect

19MaintenanceCleaning the EnclosureThe exterior of the instrument should be cleaned regularly with a dustingbrush. If necessary, the casing can be cle

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 LogDateDetector Model: Serial Number: Date of purchase:Operator Filamenttemp(°C)Detectortemp(°C)DetectorflowNoiselevelSampl

Table of ContentsIntroductionDescription and Operating Principle ... 1Safety Notes and Inf

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1IntroductionDescription and Operating PrincipleThe Thermal Conductivity Detector (TCD) has been one of the most popularGC detectors since the 1950’s,

2Safety Notes and InformationSymbolsHOT SURFACEThe surface of the detector body may be hot while inoperation (possibly in excess of 250°C). Observe c

3Components of the Detector SystemsComponents of the detector system are listed in Tables 1 and 2. Check thecontents of the packages to verify that e

4Description of Controls and ConnectorsControls and connectors are indicated in Figures 2 and 4.MAINS switch (rear panel)Controls mains (line) voltag

5IntroductionFigure 2: Front panel controlsFigure 3: Actual filament temperature vs. filament temperature knob settingsACTUAL TEMPERATURE IN °CFILAME