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Post by hamidreza on Nov 13, 2017 14:46:51 GMT -5
I am getting a "Heater 1 short" error when everything seems to be in place. Please assist me on this.
Hamidreza
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Post by Lake Shore Ogi on Nov 16, 2017 12:23:03 GMT -5
Dear Reza,
Let's keep working through email as we already have instead of through here.
Greetings,
Ogi K.
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biman
New Member
Posts: 3
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Post by biman on Jan 19, 2024 11:10:00 GMT -5
Hi,
I have a Model 335 controller. When I try to increase the temperature to 300K (and as such to any intermeadiate temperature), the heater gets automatically turned off and shows an error message "Heater 1 short". Could you please help me how resolve the issue? Thanks in advance!
Biman.
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Post by Lake Shore Jeff M on Jan 19, 2024 11:59:41 GMT -5
The Model 335 can operate with a heater resistance between 5 and 500 ohms. The heater short error indicates that it is seeing a resistance less than 5 ohms.
The first thing to do is unplug the dual banana plug from Output 1 on the rear of the Model 335 and measure the resistance across the prongs of the plug looking into the heater. If it measures less than 5 ohms, then you need to troubleshoot the heater circuit in your cryostat. If it measures greater than 5 ohms and the error comes in immediately, then there is an issue in the Model 335 which will need to be returned to the factory for a repair. If the error does not appear until you reach a particular temperature, the issue is in the cryostat.
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biman
New Member
Posts: 3
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Post by biman on Jan 19, 2024 12:03:45 GMT -5
I did check the resistance and it is showing 53 ohms. The error message is apearing within a few seconds, typically after ~5 seconds.
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Post by Lake Shore Jeff M on Feb 2, 2024 7:18:08 GMT -5
Please observe the heater output percentage and if the error comes on when the output reaches 30% overtime, the issue is most likely a defective relay in the heater circuit and the 336 will need to be shipped to the factory for a repair. If the error does not come on at 30% and does come on around the same temperature point, you have an issue in your system where the heater wiring becomes shorted when the system expands or contracts as it is heats and cools.
If the issue is in the 336, please send an email to support and provide the 336 serial number and your full contact information (name, company or educational Institute and the address of company or institute) so we can provide information regarding shipping the controller to our factory in Ohio for the repair..
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biman
New Member
Posts: 3
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Post by biman on Mar 20, 2024 10:01:18 GMT -5
The error didn't appear since I posted here last time and appeared again only today. It is not even appearing at any certain temperature or at a certain percentage output. It seems to be related to the heatre wiring getting shorted. We have a Lakeshore closed cycle helium cryostat (Model: CCS-100/204N) where the heater is mounted. Could you please suggest how to get this sorted? Thanks.
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Post by Lake Shore Jeff M on Mar 20, 2024 11:24:44 GMT -5
I would like to know the serial number of your Model 335 and if the error appears every time you run the heater. To keep the serial number private, please send it to me via email to support@lakeshore.com
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