...
e.) Purifier is still in Manual mode since the beginning, any plans to enable the "auto" mode?
We noticed that once the Liquefiers are accidentally go to "Stop" mode, then the v9 and v21 solenoid valves get closed.
f.) Calibrations of
(i) FMR : This was done by Sam by applying a conversion equation with the characteristic parameters for gHe.
(ii) Dewar Level sensors: We can adjust this by comparing with the manual gauges
g.) PT8:
It seems that this pressure sensor is accurate at high pressure but has about ~15psi off when it's below 50 psi.
Sam recommended this product (the same one): https://www.automationdirect.com/adc/shopping/catalog/process_control_-a-_measurement/pressure_sensors/pressure_transmitters/sptd25-20-0300h