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3. Kaeser Compressor (reference Kaeser 9_5869_33 USE SM Operating Manual.pdf):
* Has two control modes "DUAL" and "QUADRO" (see Section 4.4.2 page 26 on the Kaeser 9_5869_33 USE SM Operating Manual.pdf)
* DUAL: Switch between LOAD (when it reaches preset-minimum), and IDLE (when it reaches preset-maximum). When the preset Idling time has elapsed, the machine switches to READY/STANDSTILL mode.
* QUADRO: Switch between LOAD and READY/STANDSTILL after short periods of being IDLE.
Following extended times in various operating modes, the machine switches from LOAD to READY/STANDSTILL. The time in LOAD and IDLE operating modes are taken as minimum runtime.
How to Run the Kaeser Compressor continuously on the LOAD mode? (Configuration 1)
This is based on the test we performed on 11/17/2023 (see http://twist.phys.virginia.edu:8081/General/789)
Configuration 1: Kaeser continuously runs with "LOAD" mode (indicated by a sold arrow on the Kaeser screen)
Configuration 2: Kaesuer starts with "IDLE" mode (indicated by a hollow arrow on the Kaeser screen), and only goes to the "LOAD" mode for a second (with simultaneously opening the SV7 only while the LOAD mode is present). This switching happens every ~ 2 mins
Therefore we performed two types of trials to reproduce configuration 1 and configuration 2 and we found that those are consistent in each trial regardless of the "SV7 stays closed when compressor idle" state (either "YES" or "NO").
Configuration 1: (i) Close the gHe valves so that the PC1 is ~0.6. If this is higher, we have to vent by changing VM1 to manual and rotating that valve.
(ii) Start the Kaeser compressor by rotating the red knob, pressing red button, then green button, and in this case you will have to press the "green button on top part of HR3".
(iii) Count for 10 seconds, then open the gHe circulation hand valves
* You can observe that SV7 is open and Kaeser on the "LOAD" mode continuously.
Configuration 2: (i) Have a higher pressure on PC1, let's say ~5psig (I think any value above 0.75psig would work [ need to test that]), or open the valves to circulation before starting the HR3.
(ii) Start the Kaeser
* You can observe that PC1 quickly drops down to ~0.6 psig, SV7 stays closed, and Kaeser stays with "IDLE" mode for ~2mins; then SV7 will open and Kaeser changes its mode to "LOAD" only for a second.
Recursive cycles in fault mode:
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