Agilent Technologies 19239A User manual

Installation Guide
Cryogenic Oven Cooling
Accessory 19239A/B

Agilent Technologies, Inc.
2850 Centerville Road
Wilmington, DE 19808-1610
USA
© Agilent Technologies 2000
All Rights Reserved. Reproduction,
adaptation, or translation without
permission is prohibited, except as allowed
under the copyright laws.
Part number 19239-90137
First Edition, DEC 2000
Replaces Part No. 19239-90130 Operating
and Service Manual.
HP® is a registered trademark of
Hewlett-Packard Co.
Printed in USA
Safety Information
The Agilent Technologies Cryogenic Oven
Cooling meets the following IEC
(International Electrotechnical 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 Agilent 19239 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.
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.
Sound Emission Certification for Federal
Republic of Germany
Sound pressure Lp < 68 dB(A)
During normal operation
At the operator position
According to ISO 7779 (Type Test)
Schallemission
Schalldruckpegel LP < 68 dB(A)
Am Arbeitsplatz
Normaler Betrieb
Nach DIN 45635 T. 19 (Typprüfung)

Copyright© 2000
Agilent Technologies
Printed in USA Dec 2000
Agilent Part No. 19239-90137
Installing Cryogenic Oven Cooling
Accessory 19239A/B
This manual describes how to install the following cryogenic oven cooling
accessories:
19239A – Cryogenic Oven Cooling, CO2
19239B – Cryogenic Oven Cooling, N2
Prepare the GC
WARNING Hazardous voltages are present in the instrument whenever the power cord
is connected. Avoid a potentially dangerous shock hazard by disconnecting
the power cord before working on the instrument.
1. Set the main power line switch to the off position.
2. Disconnect the power cable from its receptacle.
3. Allow time for the oven and heated zones to cool.
4. When the heated zones are cool, turn off all gas supplies at the source.
Red O visible
OFF ON

Installing Cryogenic Oven Cooling Accessory 19239A/B
Prepare the GC
2
5. Remove the injection port cover by grasping its back edge and lifting it
upward. If an autosampler is installed, the injection port cover will not
be present.
6. If an autosampler is installed on the instrument, it will be necessary to
remove it and its mounting bracket to allow removal of the left side
cover.
a. Remove the autosampler tray from its mounting bracket by
simultaneously lifting and turning the two tray locks that hold it in
position, then sliding the tray away from the instrument.
b. Lift the autosampler tray from its mounting bracket and set it aside.
c. Remove the autosampler bracket by removing the six screws
securing it to the instrument.
Injection port cover
Top cover
Lid shaft
1/4-inch screw
and washer
Press here
to free cover

Installing Cryogenic Oven Cooling Accessory 19239A/B
Prepare the GC
3
7. Remove the two screws securing the left side panel along its bottom
edge.
8. Slide the left side panel towards the rear of the instrument and lift.
9. Remove the right side panel by removing four screws: two each along its
top and bottom edges.
Left side panel
Screws
Screws
Screws
Right side panel

Installing Cryogenic Oven Cooling Accessory 19239A/B
Prepare the GC
4
10. Remove the back cover of the instrument by removing four screws and
sliding the cover off the rear of the instrument.
Screws
Screws

Installing Cryogenic Oven Cooling Accessory 19239A/B
Install the Cryogenic Valve
5
Install the Cryogenic Valve
Caution The insulation on the GC is made of refractory ceramic fibers (RCF).
Ventilate your work area. Wear long sleeves, gloves, safety glasses, and a
disposable dust/mist respirator. Dispose of insulation in a sealed plastic
bag.
1. Using a screwdriver, pierce the oven insulation covering the cutout for
the cryo nozzle.
2. Cover the open end of the cryo nozzle tubing, then carefully insert the
cryo valve assembly so that the nozzle slides into the oven. Secure the
valve assembly onto the three mounting studs using a flat washer and
an M4 nut on each.
3. Route the two valve leads through the space between the oven and the
mainframe, across the rear of the instrument, to the main circuit board.
CO2nozzle
CO2fitting
N2nozzle
N2tube fitting Cryogenic valve

Installing Cryogenic Oven Cooling Accessory 19239A/B
Install the Cryogenic Valve
6
Insert lead pins into the plug connected at receptacle J9; disconnect the
plug, then insert the pins in the cryo locations on J9.
J9 Location, 4890 and 5890 GCs
Red
J9
Heaters

Installing Cryogenic Oven Cooling Accessory 19239A/B
Install the Cryogenic Valve
7
4. Position the pieces of insulation into the cryogenic valve cavity as
shown.
J9 Location, 5890 GC
Red
J9
Heaters

Installing Cryogenic Oven Cooling Accessory 19239A/B
Restore Your GC to Operating Condition
8
WARNING The plastic-coated side tags faces toward the valve.
Restore Your GC to Operating Condition
1. Reinstall the covers.
2. Connect the cryo valve to your cryogenic source as described in your
Getting Started (4890 Series GC), Agilent 5890 Shelf Reference, or Site
Prep/Installation (5890 SERIES II GC) manual.

Printed on recycled paper.
This product is recyclable.
Agilent Technologies, Inc.
Printed in USA Dec 2000
19239-90137