Adjusting The Cryobay Sample Eject Air - Agilent Technologies Cryogenic User Manual

Adjusting the CryoBay sample eject air

C A U T I O N
Cryogenic Systems Operation
The CryoBay sample eject air flow is adjusted to lift the
sample tube to the proper height if there is a cryogenics
system fault. This adjustment should be made any time the
sample weight or pneumatic gas pressure has changed. It is
also recommended that the console eject air be adjusted at
the same time.
The probe may be warm or cold for this procedure. The
following procedure assumes that a sample catcher is in use.
If making this adjustment while the system is in any state other than
Idle, use the CryoBay command line to open (eject air on) and close
(eject air off) the CryoBay sample eject pneumatic valve.
Turn on the Eject air from VnmrJ or VNMR using the
1
eject button or eject command. DO NOT continue if the
eject air is not on.
Disable the sample catcher, slide the switch to the right.
2
Place turbine with sample atop the sample catcher. The
3
turbine and sample float on the eject air stream.
4 Insert the turbine and sample into the probe from VnmrJ
or VNMR using the insert button or insert command.
Enable the sample catcher; slide the switch to the left.
5
Locate the CryoBay sample eject air valve. It will be in
6
line with the CryoBay sample eject pneumatic line, which
exits from the CryoBay on the same side as the
cryogenic transfer arm.
7 Close the needle valve attached to the eject line.
8 Open the CryoBay sample eject pneumatic valve
(instructions above). A click may be heard from the valve
box, but nothing else should happen.
Slowly open the needle valve on the eject line until the
9
sample lifts to the top of the upper barrel, and the
sample catcher engages the sample.
Verify that the lever of the sample catcher has engaged
10
the turbine and sample.
11 Close the CryoBay sample eject pneumatic valve.
Turn on the Eject air from VnmrJ or VNMR using the
12
eject button or eject command.
8
Appendix
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