cold head model M22 temperature sensor reparation

zdenek
New Member

Posts: 2

cold head model M22 temperature sensor reparation May 31, 2021 5:54:50 GMT -5

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Post by zdenek on May 31, 2021 5:54:50 GMT -5

Dear Madam / Sir,

due to the repair of a non-functional temperature sensor on the cold head model M22, we need to disconnect both the helium return line and the helium supply line from the cold head so that we can take it away. Can we do it at room temperature or do we have to use the "cold head decontamination procedure"?

Thank you

Zdeněk Janů

Lake Shore Sam G
Lake Shore

Posts: 3

cold head model M22 temperature sensor reparation Jun 1, 2021 15:34:02 GMT -5

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Post by Lake Shore Sam G on Jun 1, 2021 15:34:02 GMT -5

Is this a Janis Cryostat? If you contact us it is always nice to have the Janis serial number of your cryostat.
Yes, the flexlines should be disconnected when everything is at room temperature. Note that the fittings used in these systems are Aeroquip fittings, these are zero-dead volume, self-sealing fittings. When these are properly made up or disconnected there should be no loss of helium.
Please e-mail us at support(at)lakeshore.com if you have further questions or if you'd like me to provide you with a manual for your coldhead (and compressor) which it sounds like you might already have. These should include specific instructions on making and unmaking Aeroquip fittings.

zdenek
New Member

Posts: 2

cold head model M22 temperature sensor reparation Jun 2, 2021 4:48:29 GMT -5

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Post by zdenek on Jun 2, 2021 4:48:29 GMT -5

Dear salmsci, the device is the CTI-CRYOGENICS model 22 cold head - refrigerator with the air-cooled compressor model 8200 (supplied by Cryphysics with SN 94G05). We have a manual for the coldhead and compressor. Thanks Zdenek