Installing a PTV Inlet

Installing a PTV Inlet
Installing a PTV Inlet
Agilent 6850 Series II Network GC System
Accessories G3345B (Septumless)
and G3346B (Septum)
There are kits for installing both septum and septumless PTV inlets. This
document describes both installations.
Each kit contains:
Description
Quantity
Round grommet, small black
1
Round grommet, large blue
6
M4 machine screw, 12 mm
16
M4 hex nut w/lockwasher, 3.2 mm
1
Cable ties
6
Antistatic pouch
1
Disposable wrist strap
1
Insulation block
1
Extension cable
1
Top cryo bracket
1
Bottom cryo bracket
1
Eyelet
4
Inlet chassis
1
LC02 cryo assembly
1
Installing a PTV Inlet
Description
Quantity
EPC septumless head PTV inlet assembly (G3345B)*
or
EPC septum head PTV inlet assembly (G3346B)*
1
Ship kit
1
•
Lowbld septa 5, 11-mm
1
•
Open-end wrench, 6-mm
1
•
Open-end wrench, 5-mm
1
•
1/4 Brass union
1
•
OEM ship kit
1
Installation sheet (this document)
1
*The inlet is factory-assembled. Do not disassemble it during installation.
2
Installing a PTV Inlet
Kit Contents
Kit Contents
Screws, grommets, eyelets, nut
LCO2 cryo assembly
Extension cable
Insulation block
Inlet chassis
Top cryo bracket
PTV inlet
Covered board assembly
Bottom cryo bracket
Flow module
3
Installing a PTV Inlet
Required Tools
Required Tools
•
T-20 Torx® screwdriver
•
7/16-inch open end wrench
Overview
Caution
4
Before starting, review the safety information listed at the end of this
document.
1.
Prepare the GC.
2.
Remove the existing inlet.
3.
Install the new inlet.
4.
Restore the GC to operating condition.
Installing a PTV Inlet
Prepare the GC
Prepare the GC
WARNING
Caution
Note the following warnings:
•
Use extreme caution when working with cryogenic liquids. They can
cause very serious burns requiring emergency medical attention. Before
separating fittings, always bleed lines containing cryogenic fluids to
atmospheric pressure. Wear safety glasses and cover the fittings with a
towel when separating them.
•
Before working on an instrument, disconnect the power cord to avoid a
potentially dangerous shock hazard. Hazardous voltages are present in
the instrument whenever the power cord is connected.
•
Pressurized liquid CO2 is a hazardous material. Take precautions to
protect personnel from high pressures and low temperatures. CO2 in
high concentrations is toxic to humans; take precautions to prevent
hazardous concentrations. Do not use copper tubing or thin-wall
stainless steel tubing with liquid CO2. Both harden at stress points and
may explode. Consult your local supplier for recommended safety
precautions and delivery system design.
Do not use liquid CO2 as a coolant for temperatures below –40 °C. The
expanding liquid may form solid CO2—dry ice—in the GC oven. If dry ice
builds up in the oven, it can seriously damage the GC.
To prepare the GC:
1.
Turn off the GC and unplug the power cord. Allow time for all heated
zones to cool.
2.
Open the lid. If a column is installed, disconnect it at the detector end.
Remove the nut warmer, insulation, and capillary adapter, if present.
Close the lid.
5
Installing a PTV Inlet
Prepare 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
4.
Remove the lid top cover.
Remove vent tubing,
if present
Lid top cover, without
valve box accessory
Remove T-20 Torx
screws (8 places)
Remove detector
cover
6
Installing a PTV Inlet
Remove the existing inlet
Remove the existing inlet
Caution
As part of this step and those that follow, you must bend various sections of
tubing. Make the bends gradual and avoid kinks.
Caution
It is neither necessary nor advisable to separate the inlet from its
pneumatics module. Doing so can create leaks. Although handling the inlet
and pneumatics module as a unit is awkward, it can be managed.
Caution
This procedure requires precautions against electrostatic discharge. Use the
grounded wrist strap (part number 9300-1408) and connect it to a bare
metal surface of the GC. Failure to heed this caution may result in damage to
the instrument or to the PTV assembly.
1.
Loosen the screws holding the connector cover plate next to the inlet
flow module.
2.
Slide the cover plate off and disconnect the cable from the flow module.
3.
Disconnect the gas fitting on the rear of the flow module.
4.
Remove the three screws on top of the flow module.
(2) Slide
(3) Disconnect
(1) Loosen
(4) Remove
7
Installing a PTV Inlet
Remove the existing inlet
5.
Complete the appropriate following steps (based on the type of inlet you
are removing) to finish removing the inlet.
Cool On-Column inlet
a.
Use a T-20 Torx screwdriver to loosen the three captive screws that
attach the inlet weldment to the top of the inlet carrier.
b.
Slide the inlet up and out of the carrier. If necessary, you can also
slide the insulation sleeve off of the bottom of the inlet.
Purged Packed inlet
a.
Trace the heater/sensor cable from the inlet to the wiring harness
connector. Disconnect it.
b.
Remove the three screws holding the inlet.
c.
Lift the inlet and flow module out of the lid. Remove the insulation
from the hole under the inlet.
Programmable Temperature Vaporization inlet
8
a.
Lift up the PTV inlet.
b.
Disconnect the power cable, thermocouple connector, and cryo
connector from the flow module and board. Disconnect the module
ribbon cable from the pneumatics board.
c.
Slide the flow module out of the chassis, remove the chemical trap
assembly from the mounting bracket, and remove the PTV assembly
from the GC.
Installing a PTV Inlet
Remove the existing inlet
Split/Splitless inlet
a.
Use the inlet wrench to release the large nut on top of the inlet.
Large nut
Insert weldment
(includes nut)
b.
If you do not have a gas or liquid sample valve—Remove the insert
weldment and the flow module.
c.
If you do have a gas or liquid sample valve—The insert weldment is
part of the valve assembly. Move it out of the way. Disconnect the
gang block fitting (also part of the valve assembly), from the flow
module. Remove the flow module.
d.
Use forceps to remove the liner and O-ring.
e.
Disconnect the split vent trap.
Disconnect split vent
trap here
Top of liner
f.
Trace the heater/sensor cable to the wiring harness connector.
Disconnect it.
g.
Remove the three screws holding the inlet body.
h.
Lift the inlet assembly out of the lid. Remove the insulation from
the hole under the inlet.
9
Installing a PTV Inlet
Install the new inlet
Install the new inlet
1.
Insert the inlet chassis into the inlet opening in the top of the GC. As
you face the front of the GC, the raised edge of the chassis is on the left.
2.
Fit the insulation cup into position on the inlet body. Be sure the slot in
the insulation cup is properly fitted with the inlet.
Flow module
Slot
Inlet with insulation cup
3.
10
Place the inlet flow module into position. Be sure that the lip at the
bottom of the flow module fits into the slot in the bottom of the flow
module opening. See the picture with Step 5.
Installing a PTV Inlet
Install the new inlet
4.
With the flow module in place, insert the inlet and insulation cup into
the inlet chassis. Fasten the inlet and chassis into position with three
T-20 Torx screws.
Screws
Inlet chassis
Inlet tubing
5.
Route the inlet tubing as shown. At the rear of the GC, follow the "C"
(carrier) tubing. Using three or four cable ties, tie the inlet tubing with
the other tubing found under the lid at evenly spaced intervals. Be
careful to avoid bending the tubing sharply. Close the lid.
Flow module
Lid
Inlet tubing tied together
four places (circled)
11
Installing a PTV Inlet
Install the new inlet
6.
Place the covered board assembly into position as shown. Fasten the
assembly down with two screws.
On top of the lid, insert the captive screw into one of the vent holes in
the covered board assembly. Beneath the lid, fasten the hex nut onto
the captive screw.
Screw
Captive screw
(along side the cover
in a vent hole)
Covered board assembly
Screw
Captive screw and hex nut
7.
12
Close the lid.
Installing a PTV Inlet
Install the new inlet
8.
Attach the red cryo extension cable connector to the covered board
assembly as shown. Run the loose end of the cabling behind the inlet
flow module and to the rear of the inlet flow module. Be sure to plug the
center connector’s positive and negative sides correctly.
Covered
board
assembly
Center connector negative
Center connector positive
Red cryo extension cable
connector
13
Installing a PTV Inlet
Install the new inlet
9.
Loosen the screws on the detector module and move it forward far
enough to lower the cryo extension cable connector through the top of
the lid. Tie the red cable in with the other wiring, leaving as much slack
as possible to avoid straining the soon-to-be-made connection.
Red cable
10. If you WILL NOT be installing the Cryo kit, prepare the bottom bracket
by inserting the six blue grommets into the holes. Insert the four brass
eyelets into the top four grommets as shown.
Grommets (4) with eyelets
Install PTV valve
here
Grommets (2) only
If you ALREADY have installed the Cryo kit, disconnect the coolant
outlet union (see the picture with Step 12) and remove the screws on
the bracket to pull it far enough away from the GC to proceed with Step
11.
14
Installing a PTV Inlet
Install the new inlet
11. Attach the cryo valve onto the lower-left position of the cryo bracket,
including the screws to hold it in place.
Screws
15
Installing a PTV Inlet
Install the new inlet
12. Prepare to fasten the cryo bracket into place by first pulling the cryo
valve tubing and wires through the hole on the side of the GC. You may
not have the upper valve pictured below if you do not have the Cryo kit
installed.
Coolant outlet union
16
Installing a PTV Inlet
Install the new inlet
13. Place the cryo bracket over the four mounting holes on the left side of
the GC. Insert screws through the brass eyelets and secure them loosely.
Reattach the coolant outlet union.
Mounting holes
w/bracket in place
17
Installing a PTV Inlet
Install the new inlet
14. Open the lid and connect the valve wiring to the previously-routed red
cryo extension cable connector inside the left panel of the GC.
PTV valve wire/
red cable connect
Cryo valve
tubing
Extension cable
18
Installing a PTV Inlet
Restore the GC to operating condition
15. Route the cryo valve tubing around the counterbalance cam to the back
of the GC to meet the inlet tubing you routed in Step 5. Use a couple of
cable ties to tie the tubing together. Connect the tubing.
Lid
Counterbalance
cam
Cryo tubing
Inlet tubing
fitting
16. Continue installing the Cryo kit, if applicable. See the documentation
that came with that kit for more information.
17. Close the lid and put the top cryo bracket on.
Restore the GC to operating condition
1.
Install the capillary adapter, if used.
2.
Restore the column connection.
3.
Install the lid top cover.
4.
Restore carrier and other gases to the instrument.
5.
Restore power.
6.
Apply your normal operating pressures. Leak-check the manifold, back
panel, and column fittings.
19
© Agilent Technologies, Inc. 2004
All Rights Reserved. Reproduction, adaptation, or translation without
permission is prohibited, except as allowed under the copyright laws.
Part number G3345-90007
First Edition, July 2004
Printed in USA
Agilent Technologies, Inc.
2850 Centerville Road
Wilmington, DE 19808-1610
Acknowledgements
Torx® is a U.S. registered trademark of Textron, Inc.
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.
In the manual
A warning calls attention to a condition or possible situation that could
cause injury to the user.
A caution calls attention to a condition or possible situation that could
damage or destroy the product or the user’s work.
On the instrument
See accompanying instructions for more information.
Indicates a hot surface.
Indicates hazardous voltages.
Indicates earth (ground) terminal.
Indicates explosion hazard.
Indicates radioactivity hazard.
Indicates electrostatic discharge hazard.
Pinch hazard.
G3345-90007
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement