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Post by Lake Shore Jeff M on Feb 2, 2024 9:02:34 GMT -5
Thanks for confirming it was the comma versus decimal point issue
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Post by Lake Shore Jeff M on Feb 2, 2024 7:26:50 GMT -5
The first question is does the PC you are using use a comma or decimal point for numeric separation? If it is set to use the Comma, the latest version of curve handler will not work properly and even the curves that look like they loaded will be defective.
If you are using the decimal point, the temperature coefficient for Cernox Sensors must be Negative and the data must be in Base 10 Log Ohms of the resistance versus Temperature in Kelvin for it to work. Did you create the curves or did you download then from Lake Shore?
If the curves were downloaded form Lake Shore, please send the serial numbers to support@lakeshore.com. If you created the curves, send a copy of the .340 file to that address so I can look them over.
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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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Post by Lake Shore Jeff M on Jan 26, 2024 13:04:23 GMT -5
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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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Post by Lake Shore Jeff M on Jan 11, 2024 8:30:51 GMT -5
The short answer is that there is no industry soldering course available for wiring to small sensor devices that I am aware of.
We have developed our own techniques, borrowing from workmanship guidelines within NASA and IPC soldering standards, for in-house sensor soldering processes.
The other option is to do low DC voltage welding, but this requires access to more expensive equipment, specific fixturing for holding parts, etc.
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Post by Lake Shore Jeff M on Jan 9, 2024 14:12:46 GMT -5
I am glad to hear you are up and running as I should have mentioned to use the Legacy setting.
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Post by Lake Shore Jeff M on Jan 4, 2024 14:28:17 GMT -5
The first thing I want to do is verify you have installed the Lake Shore USB Driver for Windows 10 or later and that you see the Model 335 listed with a COM Port assigned in the Device Manager Ports (COM & LPT) tree when the USB is connected. If you see a COM Port assigned, please install the free Instrument Communications Utility found in the software section on the web site and see if you can connect and send the *IDN? query command and receive the correct response. This will confirm that the physical connection is working and then we can look at the Python Code.
If this works and you still have issues with the python script, please send the script file to support@lakeshore.com so we can have our engineering team review your code and advise what would be needed to resolve the issue.
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Post by Lake Shore Jeff M on Nov 27, 2023 14:34:38 GMT -5
The simple answer to your question is Yes, you can make measurements at any temperature between 66 and 800k using the temperature controller that was provided with the cryostat. Please check the user manual for your system for instructions on how to control the temperature.
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Post by Lake Shore Jeff M on Nov 17, 2023 13:48:26 GMT -5
I would highly recommend that you connect the voltage and current leads with the correct polarity. We have not performed any testing with incorrect connections so we cannot say if it would cause any damage or inaccurate measurements.
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Post by Lake Shore Jeff M on Nov 15, 2023 12:32:59 GMT -5
Most likely, the sensors do not require a load resistor, however, we do not calibrate them so we cannot answer the question with 100% accuracy. You would need to calibrate the sensor and verify its linearity is no more than +/- 2% between +/-10kG.
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Post by Lake Shore Jeff M on Nov 15, 2023 10:33:29 GMT -5
No, the HGT-2101 sensor is not compatible with any of the Lake Shore Gaussmeters. To use this sensor requires a separate current source that can supply 1mA and a voltmeter to measure the resulting voltage. To determine the field you have to multiply the voltage by the sensitivity of the sensor which you will need to determine yourself.
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Post by Lake Shore Jeff M on Oct 23, 2023 6:34:39 GMT -5
In order to assist you I need to know what the heater resistance is. The High heater range on the Model 336 can work with heaters that have a resistance between 5 and 500 Ohms. If your heater is less than 5 ohms, you will see the heater short error once the output reaches 30%. On the hi end, anything greater than 500 ohms will produce a heater Open error.
If your heater resistance is between 5 and 500 ohms and you are seeing the error, the Model 336 will need to be sent back to the factory for a repair. If that is the case, please contact us at support@lakeshore.com and provide teh serial number of the 336 as well as your contact information.
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Post by Lake Shore Jeff M on Oct 23, 2023 6:27:26 GMT -5
I am unable to tell you how to make the connections on the 10-pin connector without knowing exactly wat system you are using. If the system was manufactured by Lake Shore Cryotronics, Inc. or Janis Research, please tell me what model and serial number you have and I can send you the wiring information. If the system you have was manufactured by a different manufacturer, you will need to contact them to get the wiring information.
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Post by Lake Shore Jeff M on Sept 11, 2023 11:55:39 GMT -5
Basically either way will work, however, suggestion a may be easier to perform.
The Kovar leads of the DT-670-SD sensor were trimmed to approximately 3/16" when the DT32-0.2 lead additions were added so you do not have much area to attach the new wire directly to the leads, however, it can be done.
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