SatoshiTanioka - 21:47, Thursday 21 November 2019 (1863)
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
Comments related to this report
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.