Agilent Technologies 6890 Series User manual

6890 Series Gas Chromatograph
Service Manual

6890 Series Gas Chromatograph
Service Manual

Agilent Technologies Inc.
2850 Centerville Road
Wilmington, DE 19808-1610
 Agilent Technologies, Inc.
1989–2001
All Rights Reserved.
Reproduction, adaptation, or
translation without permission
is prohibited, except as
allowed under the copyright
laws.
Part No. G1530-90350
Fifth edition, Jun 2001
Fourth edition, Jun 2001
Third edition, Dec 1997
Second edition, May 1997
First edition,Jan 1995
Supercedes Part No.
G1530-90647.
Available only on CD-ROM,
Part No. G1530-90220.
Printed in USA
Safety Information
The 6890 Gas Chromatograph
(GC) meets the following IEC
(InternationalElectrotechnical
Commission) classifications:
Safety Class 1, Transient
Overvoltage Category II, and
Pollution Degree 2.
This unit has been designed
and tested in accordance with
recognized safety standards
and designed for use indoors.
If the instrument is used in a
manner not specified by the
manufacturer, the protection
provided by the instrument
may be impaired. Whenever
the safety protection of the
6890 GC has been
compromised, disconnect the
unit from all power sources
and secure the unit against
unintended operation.
Refer servicing to qualified
service personnel. Substituting
parts or performing any
unauthorized modification to
the instrument may result in a
safety hazard. Disconnect the
AC power cord before
removing covers. The customer
should not attempt to replace
the battery or fuses in this
instrument. The battery
contained in this instrument is
recyclable.
Safety Symbols
Warnings in the manual or on
the instrument must be
observed during all phases of
operation, service, and repair
of this instrument. Failure to
comply with these precautions
violates safety standards of
design and the intended use of
the instrument.
Agilent Technologies assumes
no liability for the customer's
failure to comply with these
requirements.
WARNING
A warning calls attention to a
condition or possible situation
that could cause injury to the
user.
CAUTION
A caution calls attention to a
condition or possible situation
that could damage or destroy
the product or the user's work.
See accompanying
instructions for
more information.
Indicates a hot
surface.
Indicates hazardous
voltages.
Indicates earth
(ground) terminal.
Indicates radio-
active hazard.
Indicates explosion
hazard.
Electromagnetic
compatibility
This device complies with the
requirements of CISPRII.
Operation is subject to the
following two conditions:
1. This device may not cause
harmful interference.
2. This device must accept any
interference received,
including interference that
may cause undesired
operation.
If this equipment does cause
harmful interference to radio
or television reception, which
can be determined by turning
the equipment off and on, the
user is encouraged to try one
or more of the following
measures:
1. Relocate the radio or
television antenna.
2. Move the device away from
the radio or television.
3. Plug the device into a
different electrical outlet, so
that the device and the
radio or television are on
separate electrical circuits.
4. Make sure that all
peripheral devices are also
certified.
5. Make sure that appropriate
cables are used to connect
the device to peripheral
equipment.
6. Consult your equipment
dealer, Agilent
Technologies, or an
experienced technician for
assistance.
7. Changes or modifications
not expressly approved by
Agilent Technologies could
void the user’s authority to
operate the equipment.
Sound Emission
Certification for
Federal Republic of
Germany
Sound Pressure
Sound pressure Lp < 65 dB(A)
according to DIN-EN 27779.
When operating the 6890 with
cryo valve option, the sound
pressure is approximately 74.6
dB(A) during cryo valve
operation for short burst
pulses.
Schalldruckpegel
Schalldruckpegel LP < 65
dB(A) nach DIN-EN 27779.
Bei Betrieb des 6890 mit Cryo
Venti Option treten beim
Oeffnen des Ventils kurzfristig
Impulse bis zu einem
Schalldruckpegel Lp von
ca.74.6 dB(A) auf.

Contents
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Contents
Agilent 6890 Gas Chromatograph Service Manual
100 Before Servicing the Instrument
110 Safety
Cautions .......................................................................................................1
Printed circuit boards.........................................................................1
Voltage carrying components............................................................1
Columns................................................................................................1
TCD Detector.......................................................................................1
Warnings.......................................................................................................2
Heated components ............................................................................2
Voltage carrying components............................................................2
Insulation..............................................................................................3
Gases.....................................................................................................3
120 Tools Required
Tools re uired..............................................................................................1
Basic......................................................................................................1
Specialized ...........................................................................................2
130 Calibration otes
Calibrating the 6890 GC..............................................................................1
Calibration options .............................................................................1
Factory calibrations............................................................................2
200 Inlets
210 Split/Splitless Inlet
Theory of operation ....................................................................................1
EPC inlet ......................................................................................................2
Split mode operation ..........................................................................2
Pulsed split mode ................................................................................2
Splitless mode......................................................................................3
Pulsed splitless mode .........................................................................4
Gas saver mode ...................................................................................4

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Manually controlled inlet........................................................................... 5
Split mode ............................................................................................ 5
Splitless mode ..................................................................................... 6
Replacement procedures ........................................................................... 8
Removing the inlet .............................................................................. 8
Top insert assembly replacement.....................................................9
Heater/sensor assembly replacement ............................................ 11
Reinstalling the inlet......................................................................... 11
Replacing the split vent trap............................................................ 13
Replacing the split vent trap filter cartridge.................................. 15
Replacing the inlet EPC flow manifold .......................................... 17
Replacing the supply fitting on a Type 1 flow manifold............... 18
Leak testing—EPC and manual inlets.................................................... 19
Preparation ........................................................................................ 19
Performing the leak test—EPC inlets ............................................ 21
Performing the leak test—manual inlets ....................................... 24
Leak testing the EPC module only.......................................................... 26
Forward pressure valve leaks ......................................................... 27
Locating leaks on the flow manifold .............................................. 27
Correcting leaks ................................................................................ 29
Potential leak points......................................................................... 30
220 Purged/Packed Inlet
Theory of operation.................................................................................... 1
EPC inlet .............................................................................................. 1
Manually controlled inlet ................................................................... 3
Replacement procedures ........................................................................... 4
Replacing the inlet .............................................................................. 4
Replacing an EPC flow manifold ...................................................... 8
Replacing the supply fitting on a Type 1 EPC manifold................. 9

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Leak testing—EPC and manual inlets ....................................................10
Preparation ........................................................................................10
Performing the leak test—EPC inlets.............................................12
Performing the leak test—manual inlets........................................14
Leak testing the EPC module only..................................................15
Forward pressure valve leaks..........................................................16
Locating leaks on the flow manifold...............................................16
Correcting leaks ................................................................................18
Potential leak points .........................................................................19
230 Cool On-Column Inlet
Theory of operation ....................................................................................1
EPC inlet...............................................................................................2
Manually controlled inlet ...................................................................3
Replacement procedures ...........................................................................4
Replacing the inlet ..............................................................................4
Replacing the heater/sensor assembly .............................................7
Replacing the inlet EPC flow manifold ............................................8
Replacing the supply fitting on a Type 1 EPC flow manifold........9
Leak testing EPC and manual inlets .......................................................10
Preparation ........................................................................................10
Performing the leak test—EPC inlets.............................................12
Performing the leak test—manual inlets........................................14
Leak testing the EPC module only..................................................15
Forward pressure valve leaks..........................................................15
Locating leaks....................................................................................16
Correcting leaks ................................................................................18
Potential leak points .........................................................................19
240 Programmed Temperature Vaporization Inlet (PTV)
Theory of operation ....................................................................................1
Operating modes .................................................................................1
Sampling heads....................................................................................2

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Split modes .................................................................................................. 3
Septum head installed ........................................................................ 3
Septumless head installed.................................................................. 4
Pulsed split modes .............................................................................. 5
Splitless modes............................................................................................ 6
Pulsed splitless mode ......................................................................... 8
Solvent vent mode ...................................................................................... 9
Stage 1: Sample and vent ................................................................... 9
Stage 2: Sample transfer................................................................... 11
Stage 3: Purge and cleanup.............................................................. 12
Replacement procedures ......................................................................... 13
Replacing the PTV inlet, pneumatics, and manifold..................... 13
Replacing the PTV with cooling assembly..................................... 16
Replacing the CO2 or LN2 inlet cryo assembly.............................. 18
Replacing the PTV manifold assembly........................................... 19
Removing both the manifold and plumbing assemblies .............. 22
Replacing the plumbing assemblies ............................................... 23
Replacing a gang fitting restrictor or O-ring.................................. 25
Replacing the PTV thermocouple PCB ..........................................25
Replacing the filter............................................................................ 26
Replacing the inlet adapter.............................................................. 27
Installing the column ........................................................................ 28
Removing the septumless head....................................................... 29
Cleaning the septumless head ......................................................... 30
Replacing the Teflon ferrule............................................................ 32
Removing/replacing the septum head ............................................ 33
Replacing the septum ....................................................................... 35
Replacing the liner ............................................................................ 35
Diagnostics ................................................................................................ 38
Shutdown behavior........................................................................... 38
Leak testing................................................................................................ 39
Preparation ........................................................................................ 39
Performing the leak test................................................................... 40

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Leak testing the PTV module only ..........................................................42
Forward pressure valve leaks..........................................................43
Locating leaks on the flow manifold...............................................43
Correcting leaks ................................................................................45
Potential leak points .........................................................................45
250 Volatiles Interface
Theory of operation ....................................................................................1
Split mode ............................................................................................1
Splitless mode.....................................................................................2
Direct mode .........................................................................................4
Gas saver ..............................................................................................7
Replacement procedures ...........................................................................8
Replacing or cleaning the interface ..................................................8
Replacing the heater/sensor assembly ...........................................11
Replacing the EPC manifold............................................................14
Calibrating your interface ................................................................18
Replacing the filter............................................................................19
Replacing or cleaning restrictors ....................................................20
Replacing the gang fitting.................................................................21
Leak testing the volatiles interface .........................................................22
Leak checking....................................................................................22
Preparing the interface for a leak test ............................................25
Leak testing the EPC module only..........................................................26
Forward pressure valve leaks..........................................................27
Locating leaks on the flow manifold...............................................27
Correcting leaks ................................................................................29
Potential leak areas...........................................................................30
260 Solvent Vapor Exit Accessory
Theory of operation ....................................................................................1
Replacement procedures ...........................................................................2
Replacing the valve/fitting assembly ................................................2
Replacing the bleed restrictor column .............................................4
Replacing the tri-column assembly...................................................5
Replacing the pre-column assembly .................................................6

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Leak testing.................................................................................................. 7
Potential leak points........................................................................... 7
Leak testing the tri-column assembly............................................... 7
Leak testing the SVE assembly.......................................................... 9
270 Pneumatics Control Module
Theory of operation.................................................................................... 1
Replacement procedures ........................................................................... 2
Replacing the PCM.............................................................................. 2
Replacing the PCM gang weldment .................................................. 4
Calibrating the PCM interface........................................................... 5
Leak testing the PCM.................................................................................. 7
Forward pressure valve leaks ........................................................... 8
Locating leaks on the flow manifold ................................................ 8
Correcting leaks ................................................................................ 10
Potential leak areas .......................................................................... 10
300 Detectors
310 Flame Ionization Detector (FID)
Theory of operation.................................................................................... 1
EPC detector ....................................................................................... 1
Manually controlled detector ............................................................ 2
Replacement procedures ........................................................................... 4
Replacing the entire detector ............................................................ 4
Replacing the detector weldment ..................................................... 8
Replacing the collector assembly ..................................................... 9
Replacing the FID jet........................................................................ 11
Removing the electrometer ............................................................. 13
Removing a flow manifold ............................................................... 14
Installing a manifold ......................................................................... 16
Removing the FID interface board ................................................. 20
Diagnostics ................................................................................................ 22
FID ignition problems ...................................................................... 22

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Cleaning an FID jet and collector ...........................................................23
Cleaning the collector.......................................................................23
Cleaning the jet..................................................................................23
320 itrogen Phosphorus Detector ( PD)
Theory of operation ....................................................................................1
EPC detector........................................................................................1
Manually controlled detector ............................................................3
Recommended settings ..............................................................................4
E uilibration time ...............................................................................4
Turning hydrogen off during a solvent peak....................................4
Turning hydrogen off between runs .................................................4
Bead voltage.........................................................................................4
Extending the life of the bead ...........................................................4
Temperature programming................................................................5
Jets and collectors ..............................................................................5
Correcting NPD hardware problems........................................................7
Replacement procedures .........................................................................10
Software .............................................................................................10
Replacing the entire detector ..........................................................10
Replacing the active element (bead) ..............................................13
Removing the collector assembly ...................................................16
Replacing the jet................................................................................18
Removing the electrometer..............................................................19
Removing an EPC flow manifold ....................................................20
Installing a Type 2 manifold.............................................................22
Replacing the detector interface board..........................................28
Cleaning the NPD jet and collector ........................................................30
Cleaning the collector.......................................................................30
Cleaning the jet..................................................................................31

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Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
330 Thermal Conductivity Detector (TCD)
Theory of operation.................................................................................... 1
Delta PRT............................................................................................. 3
Error messages.................................................................................... 4
EPC detector ....................................................................................... 5
Manually controlled detector ............................................................ 5
Replacement procedures ........................................................................... 7
Replacing the entire detector ............................................................ 7
Replacing the detector cell .............................................................. 10
Removing an EPC flow manifold .................................................... 13
Installing a Type 2 manifold ............................................................ 15
Replacing the detector interface card............................................ 21
Cleaning the Thermal Conductivity Detector ....................................... 23
340 Electron Capture Detector (ECD)
Theory of operation.................................................................................... 1
EPC detector ....................................................................................... 2
Manually controlled detector ............................................................ 2
Replacement procedures ........................................................................... 4
Replacing the entire detector/detector cell ..................................... 4
Replacing the heater/sensor assembly ............................................. 8
Replacing the makeup gas adapter................................................. 10
Removing the EPC flow manifold................................................... 11
Removing the signal board .............................................................. 14
Replacing the detector interface card............................................ 16
Diagnostics ................................................................................................ 17
Fre uency test ................................................................................... 17
Leak test ............................................................................................. 18
Troubleshooting contamination problems ............................................ 20
Ensure clean gas supplies................................................................ 20
Isolate problem to carrier or makeup gas supplies ...................... 20
Evaluate the makeup side................................................................ 21
Evaluate the carrier side .................................................................. 22
Maintaining an ECD detector .................................................................. 23
ECD bakeout ..................................................................................... 23
Performing a radioactivity leak test (wipe test) ........................... 24

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Contents
Agilent 6890 Gas Chromatograph Service Manual
341 Micro-cell Electron Capture Detector (µ-ECD)
Theory of operation ....................................................................................1
EPC detector........................................................................................2
Replacement procedures ...........................................................................3
Replacing the entire detector/detector cell .....................................3
Replacing the heater/sensor assembly .............................................6
Replacing the makeup gas adapter ...................................................9
Removing an EPC flow manifold ....................................................11
Installing a Type 2 manifold.............................................................13
Removing the signal board...............................................................18
Replacing the detector interface card ............................................20
Diagnostics.................................................................................................22
Fre uency test ...................................................................................22
Leak test .............................................................................................23
Maintaining a µ-ECD detector .................................................................25
µ-ECD bakeout (thermal cleaning) .................................................25
Performing a radioactivity leak test (wipe test)............................26
350 Flame Photometric Detector (FPD)
Theory of operation ....................................................................................1
Single wavelength FPD.......................................................................2
Dual wavelength FPD .........................................................................3
Operating conditions ..........................................................................3
Replacement procedures ...........................................................................4
Replacing the entire detector ............................................................4
Column installation.............................................................................6
Cleaning/replacing windows, filters, and seals ...............................8
Cleaning/replacing the jet ................................................................12
Replacing the transfer line fused silica liner .................................15
Replacing the photomultiplier tube ................................................18
Replacing the heater/sensor assemblies ........................................20
Replacing the ignitor glow plug.......................................................22
Removing an FPD flow manifold ....................................................24
Installing a Type 2 manifold.............................................................25

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Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
Diagnostics ................................................................................................ 32
Quenching effects ............................................................................. 32
PMT saturation.................................................................................. 32
Detector temperature considerations ............................................ 32
Flame ignition problems .................................................................. 33
Leak testing................................................................................................ 35
Potential leaks areas......................................................................... 35
360 Auxiliary EPC
Theory of operation.................................................................................... 1
External flow restrictor (Type 2 manifold) ..................................... 1
Replacement procedures ........................................................................... 4
Removing the auxiliary manifold (type 1 or type 2)....................... 4
Installing a type 2 manifold................................................................ 6
Changing an auxiliary channel frit.................................................. 14
400 Mainframe
410 Covers and Fans
Plastic covers .............................................................................................. 1
Metal covers ................................................................................................ 2
Removing the electronics cover................................................................ 3
Removing the detector cover .................................................................... 4
Replacing the detector top cover.............................................................. 6
Removing the pneumatics top cover........................................................ 8
Removing the pneumatics RFI shielding ................................................. 8
Removing the left side cover..................................................................... 9
Removing the right side cover................................................................. 10
Removing the ALS tray bracket .............................................................. 11
Removing the inlet carrier cover ............................................................ 12
Removing the inlet carrier ....................................................................... 13
Removing the rear covers........................................................................ 14
Removing the top rear cover ........................................................... 14
Removing the bottom rear cover .................................................... 15
Removing the injection port fan cover................................................... 16

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Contents
Agilent 6890 Gas Chromatograph Service Manual
Removing the injection port fan..............................................................16
Removing the keyboard ...........................................................................17
Removing the pneumatics area fan.........................................................18
Chassis mounted fan.........................................................................18
Bracket mounted fan ........................................................................19
420 Oven and Temperature Control
Heated zones................................................................................................1
Oven ramp rates ..................................................................................1
Configuring the GC for an MSD.........................................................2
Oven temperature troubleshooting...........................................................3
Testing resistance of the heater coil.........................................................4
Cryo valve installation/replacement.........................................................5
Installing a new cryo valve.................................................................5
Replacing an existing cryo valve.......................................................7
Replacing the oven shroud assembly .....................................................10
Replacing the oven sensor .......................................................................13
Replacing the oven fan .............................................................................14
Replacing the oven fan motor .................................................................15
Replacing the oven flap motor ................................................................17
Converting the oven type .........................................................................19
Configuring the oven ........................................................................19
430 Power/Electronics Replacement
Replacing the main board ..........................................................................1
Installing an MIO card (6890A and 6890 Plus) .......................................7
Replacing ROMs on the main board (6890A and 6890 Plus) ...............11
Removing a ROM...............................................................................11
Inserting a ROM.................................................................................12
Replacing the battery................................................................................13
Replacing the pneumatics board.............................................................14
Replacing the PCB bracket ..............................................................15
Replacing the transformer—GC serial number < 10225 ......................17
Replacing the transformer—GC serial number ≥ 10225 ......................19
Replacing the ALS Interface Board.........................................................23

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Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
500 Site Preparation
510 Environmental
Temperature and humidity ranges............................................................ 1
Ventilation re uirements............................................................................ 1
Venting oven exhaust ......................................................................... 1
Venting toxic or noxious gases ......................................................... 2
Benchtop space re uirements................................................................... 2
520 Gases
Gas re uirements ........................................................................................ 1
Gases for packed columns................................................................. 1
Gases for capillary columns .............................................................. 2
Gas purity............................................................................................. 4
The gas plumbing ........................................................................................ 5
Supply tubing for carrier and detector gases .................................. 6
Two-stage pressure regulators.......................................................... 7
Pressure regulator-gas supply tubing connections......................... 7
Traps..................................................................................................... 8
Cryogenic cooling re uirements............................................................... 9
Choosing a coolant ............................................................................. 9
Using carbon dioxide........................................................................ 10
Using li uid nitrogen ........................................................................ 12
Supplying valve actuator air .................................................................... 13
530 Power
Grounding .................................................................................................... 1
Line voltage.......................................................................................... 1
USA fast heating oven ........................................................................ 2
Canadian installation.......................................................................... 3

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Contents
Agilent 6890 Gas Chromatograph Service Manual
540 Instrument Specifications
Physical specifications ...............................................................................1
Dimensions and average weight........................................................1
Laboratory environmental conditions ..............................................1
Safety certifications ............................................................................1
Data communications.........................................................................1
Heated zones........................................................................................1
Column oven................................................................................................2
Inlets .............................................................................................................3
Detectors......................................................................................................4
FID ........................................................................................................4
NPD.......................................................................................................4
TCD .......................................................................................................5
ECD.......................................................................................................5
µ-ECD....................................................................................................5
FPD .......................................................................................................5
AED.......................................................................................................5
MSD.......................................................................................................5
600 Performance Verification
610 Checkout Chromatograms
FID checkout conditions and chromatogram .........................................2
Typical values ......................................................................................5
NPD checkout conditions and chromatogram ........................................6
Typical values ......................................................................................9
TCD checkout conditions and chromatogram ......................................10
Typical values ....................................................................................13
ECD checkout conditions and chromatogram ......................................14
Typical values ....................................................................................17
Microcell ECD checkout conditions and chromatogram ....................18
Typical values ....................................................................................21
FPD checkout conditions and chromatogram ......................................22
Typical values ....................................................................................25

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Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
700 Preventive Maintenance
800 Error Codes and Internal Diagnostics
810 Overview
Error message types................................................................................... 1
Not ready.............................................................................................. 1
Method mismatch ............................................................................... 1
Warnings .............................................................................................. 2
Shutdowns ........................................................................................... 2
Faults.................................................................................................... 2
Bad mainboard and fatal errors ........................................................ 2
820 ot Ready Messages
Oven temperature not ready...................................................................... 1
Temperature zone not ready ..................................................................... 2
Pressure and/or flow not ready................................................................. 3
Detector not ready...................................................................................... 4
Valve not ready............................................................................................ 7
Miscellaneous messages ............................................................................ 8

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Contents
Agilent 6890 Gas Chromatograph Service Manual
830 Warning Codes
840 Shutdowns
850 Faults
860 Bad Mainboard and Fatal Errors
900 Remote Access
1000 Cabling Configuration and Electronics
1010 Cabling Diagrams, 6890A and 6890 Plus
Overview of 6890 GC cable connections..................................................1
6890 GC
GC ChemStation
GC Automatic Li uid Sampler...................................................................2
6890 GC
Mass Selective Detector
GC ChemStation
GC Automatic Li uid Sampler...................................................................3
6890 GC
GC Automatic Li uid Sampler
Non-Agilent Data System ...........................................................................4
6890 GC
3396B/C INET Integrator
GC Automatic Li uid Sampler
Modem..........................................................................................................5
6890 GC
3395A/3396B Integrator
GC Automatic Li uid Sampler...................................................................6
6890 GC
3395B/3396C Integrator
GC Automatic Li uid Sampler...................................................................7

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Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
6890 GC
35900C/D/E Analog-to-Digital Converter
GC Automatic Li uid Sampler................................................................... 8
6890 GC
7694 Headspace Sampler
GC ChemStation.......................................................................................... 9
6890 GC
7694 Headspace Sampler
3396B/C INET Integrator ......................................................................... 10
6890 GC
7694 Headspace Sampler
Non-INET Integrator ................................................................................ 11
6890 GC
7694 Headspace Sampler .........................................................................12
6890 GC
External Events (an unspecified, non-Agilent instrument)................. 13
6890 GC
G1900A Purge and Trap ........................................................................... 14
1015 Cabling Diagrams, 6890
Overview of 6890N GC cable connections .............................................. 1
6890N GC
GC ChemStation/Cerity
GC Automatic Li uid Sampler................................................................... 2
6890N GC
Mass Selective Detector
GC ChemStation
GC Automatic Li uid Sampler................................................................... 3
6890N GC
GC Automatic Li uid Sampler
Non-Agilent Data System........................................................................... 4
6890N GC
3395A/3396B Integrator
GC Automatic Li uid Sampler................................................................... 5

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Contents
Agilent 6890 Gas Chromatograph Service Manual
6890N GC
3395B/3396C Integrator
GC Automatic Li uid Sampler...................................................................6
6890N GC
35900C/D/E Analog-to-Digital Converter
GC Automatic Li uid Sampler...................................................................7
6890N GC
7694 Headspace Sampler
GC ChemStation..........................................................................................8
6890N GC
7694 Headspace Sampler
Non-INET Integrator...................................................................................9
6890N GC
7694 Headspace Sampler .........................................................................10
6890N GC
External Events (an unspecified, non-Agilent instrument).................11
6890N GC
G1900A Purge and Trap............................................................................13
6890N GC
Mass Selective Detector
GC ChemStation/Cerity
Headspace Sampler ..................................................................................14
1020 Cable Electronics
Analog signal outputs .................................................................................1
Analog cable — GC to 3395A/B or 3396B/C Integrators and
35900 C/D/E Analog to Digital Interface instrument....................1
Analog cable — general use ..............................................................2
Automatic sampler, 6890A GC...................................................................3
Cable pinouts, 6890 GC to Automatic Li uid Sampler ..................3
Automatic sampler, 6890 Plus and 6890N GCs........................................4
6890 Plus...............................................................................................4
6890N ....................................................................................................4
BCD Inputs...................................................................................................6
6890A and 6890 Plus ...........................................................................6
6890N ....................................................................................................7