Agilent Technologies Cryogenic User Manual page 38

2
Cryogenic Operation
C A U T I O N
38
Position the Removable Agilent Cold Probe accessory in
4
its highest position under the probe. Lower the probe
from the magnet onto the accessory.
Open the side- arm support assembly clamp:
5
Loosen the clamp knob.
a
Unlatch the clamp knob.
b
Loosen the side arm support adjustment knobs, if
c
necessary, to move the side- arm support away from
the probe.
Disconnect the VT control cable from the heater knob
6
assembly.
7 Disconnect the VT gas supply from the heater knob
assembly (replace center tube air flow as soon as
possible. Do not leave the probe without air flow for
longer than two minutes).
Remove the heater knob assembly.
8
Loosen the cradle nut thumb screw one turn on
9
adjustment- nut style.
Disengage the bayonet cradle mount as follows:
10
Lower the probe by rotating the cradle nut or dial
a
counter- clockwise (as viewed from the bottom) to
move the probe down.
Lift the probe body to disengage the bayonet cradle
b
mount.
c Disengage the cradle support pins from the mounting
flange.
Clamp the probe onto the Removable Agilent Cold
d
Probe accessory.
11 Attach a >5 lpm dry gas source (air or nitrogen) to the
Agilent Cold Probe's center tube using the fitting
supplied with the Removable Agilent Cold Probe
accessory.
Failure to supply nitrogen gas to the Agilent Cold Probe's center
tube during cryogenic operation can result in condensation and frost
in the bore of the probe with potential damage to the probe.
Cryogenic Systems Operation