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R&D (Cryogenic)
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SatoshiTanioka - 21:47, Thursday 21 November 2019 (1863)Get code to link to this report
The behavior of vacuum gauge

I found that the vacuum gauge seemed to be working at relatively higher pressure level.
I vent a littele bit and started pumping down to see the behavior of vacuum gauge.

At some extent pressure, the gauge worked and the output voltage was not so strange.
The attached figure shows the pressure level (behavior of the gauge).

However, the voltage went crazy around 2*10-3 Pa and the display showed an error.

Images attached to this report
1863_20191121134034_21nov2019.png
Comments related to this report
SatoshiTanioka - 12:01, Friday 22 November 2019 (1869)

I checked the output voltage from the vacuum gauge and it was 0.2V.
This indicates that there is an error in the B-A gauge or the sensor.

I did degas, but this not change the situation.

One possible solution is to clean up the gauge.