Agilent Technologies 6850 GCs Installing Download

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Installing an Auxiliary Pressure Control Module
Disconnect the GC

Disconnect the GC

WARNING

Hydrogen gas is flammable and potentially explosive. Before replacing the
module, turn off the hydrogen gas at the source.

Turn off the GC and unplug the power cord. Allow time for all heated
zones to cool.

Disconnect all cables from the GC.

Turn all gases off at their sources. Disconnect the carrier and detector
gas tubing from the back panel of the instrument.

Disconnect gas supply tubing

from these fittings

Summary of Contents for 6850 GCs

Page 2: ...2 Installing an Auxiliary Pressure Control Module Parts identification Parts identification Aux pressure assembly Minifold label Hex nut w lockwasher control module ...

Page 3: ...uired tools 3 Required tools Torx T 20 screwdriver Needle nose pliers Overview Caution Before starting review the safety information listed at the end of this document 1 Disconnect the GC 2 Install the new module 3 Restore the GC to operating condition ...

Page 4: ... replacing the module turn off the hydrogen gas at the source 1 Turn off the GC and unplug the power cord Allow time for all heated zones to cool 2 Disconnect all cables from the GC 3 Turn all gases off at their sources Disconnect the carrier and detector gas tubing from the back panel of the instrument Disconnect gas supply tubing from these fittings ...

Page 5: ...om the GC If you have a Series II GC save this panel Otherwise set this panel aside because you will no longer use it A new panel comes with the kit Install the new module Caution Always hold the module by its support bracket to avoid damaging board components 1 Change one or more auxiliary channel frits if needed See Changing the flow restrictors optional on page 8 Remove ...

Page 6: ...nose pliers to remove the knockouts for the ribbon cable and power cable slots 3 Remove the tape from around the new control module and thread the ribbon cable through the slot in the back panel 4 Attach the ribbon cable to the pneumatics control board at P9 High voltage power Low voltage power Ribbon cable slot Ribbon cable connector ...

Page 7: ...th a cable tie 6 Attach the control module to the back panel by hooking the tabs on the module just inside the ribbon cable slot Position it so you can insert the threaded stud through the hole in the panel On the inside use the hex nut with lockwasher to hold the stud in place 7 Install the back panel Gas tubing Cable tie Control module Nut holding stud in place ...

Page 9: ...e 1 Pressure requirements for AUX EPC flow restrictors with air nitrogen or helium 19234 60660 blue dot 19231 60770 red dot 19231 60610 brown dot 10 0 80 20 30 40 50 60 70 Minimum source pressure psig 0 1 100 0 1000 0 1 0 10 0 Gas Flow in mL min Ambient conditions 25 C 14 7 psia ...

Page 10: ...le Figure 2 Pressure requirements for AUX EPC flow restrictors with hydrogen 19234 60660 blue dot 19231 60770 red dot 19231 60610 brown dot 10 0 80 20 30 40 50 60 70 0 1 100 0 1000 0 1 0 10 0 Ambient conditions 25 C 14 7 psia Gas Flow in mL min Minimum source pressure psig ...

Page 13: ...Installing an Auxiliary Pressure Control Module Restore the GC to operating condition 13 ...