Operation
Cryomech, Inc. recommends that you maintain a regular record, at intervals that make sense
for the way you use your system, of the high and low pressure readings
7.5.2 Cold head temperature
Temperature changes are the other key diagnostic.
If a temperature sensor is attached to the cold head heat exchanger(s), Cryomech, Inc.
strongly recommends that you monitor the temperature(s) daily.
Cryomech, Inc. also recommends that you keep a regular record of the temperature(s) at
intervals that make sense for the way you use your system.
7.5.3 Cooling water input and output (if applicable)
If possible, Cryomech, Inc. recommends keeping a regular record of the input and output
cooling water temperatures and of the cooling water flow rate.
7.6 Disassembling the system for transport or storage
Use the following steps to prepare a Cryomech, Inc. cryocooler for eventual transport or
storage.
1. Disconnect the main power to the system by switching the dedicated circuit breaker
to the off position.
2. Disconnect the power cord from the external breaker panel. Coil up the power cord in
preparation for transport or storage.
3. Disconnect the cold head motor cord from the cold head and from the helium
compressor package. Coil the cold head motor cord in preparation for transport or
storage.
4. Turn off the water supply at the source.
5. Using two wrenches disconnect the supply and return water lines from the inlet and
outlet fittings by turning the fittings counterclockwise until they are released from the
fittings. Store the connectors for transport or storage.
6. Drain the water from the helium compressor package. Blow remaining water out with
compressed air.
IMPORTANT
4K PULSE TUBE SYSTEMS ONLY
Do not continue with the remaining steps until the cold head temperature has risen above 150 K. If
the cold head is disconnected from the system while below 150 K, helium will expand within the
cold head as it warms, escape through the pressure relief valve and require the user to recharge
the system with helium before it would again operate properly.
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