Bruker BMPC/2, Technical Manual

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Configuration (administrator)
In the He Measurement Check window you can activate the helium level monitoring.
During the monitoring you can examine whether the helium changes over a preset
period of time. This time period can be varied within a range of 1 and 7 days using the
field „Set Monitor Period to x days“. When the value of the helium level remains stable
for the selected time a warning will be given and a warning light will be activated. With
this a missing or incorrectly initialized helium level measurement can be recognized.
12.3.3.4 Pulse Tube Cooler
If your magnet system includes a Pulse Tube Cooler (PTC) it is recommended that this
be monitored. The PTC is not monitored directly, but by monitoring the heater power
(Heater Power 1), it can be determined whether the PTC is operating properly.
Normally the heater power (Heater Power 1) must be above the set value. If the heater
power is below this limit for more than the set time this usual indicates there is a prob-
lem.
In this case the system turns on the warning lamp and the software causes the "Info-Dia-
log" to popup.
To clear the warning and to switch off the warning lamp you must confirm the warning in
the "Info-Dialog".
Figure 12.20Tools - Options - Pulse Tube Cooler