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The most important things to frequently check:
1) LCW supply (see the section 1 above).
2) LCW outlet temperatures from the coldheads (see the section 1 above).
3) HR3 status (should be always running in the LOAD mode): see HR3 Manual for more details. The arrow shown on its display should be a "SOLID-ARROW", not "HOLLOW-ARROW"
You can check its status by plotting "HR3 Enabled" from the strip-charts https://e906-gat1.fnal.gov/data-summary/e1039/target-all-auto.php,
and it should be the value "-1" when it is running, and "0" when it is off.
4) Check the Compressors' status. There are 10 coldhead compressors as two arrays on the east-side of the cryoplatform. Each array of compressors corresponds to a liquefier (A: bottom-row, B: top-row).
Essentially, each compressor screen should show "EASYCOOL", but no "ALARMS" or "ERRORS" in the operational conditions.
On the strip charts,
1) Ensure both Liquefiers are producing LHe. Check the top-right plot in the https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/target-tv.php.
2) Ensure the purifier has LN2 level above 75%. Check the top-middle plot in the https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/target-tv.php.
If the level is below 75%, then perform a refill using the procedure: docdb 10337
3) Check the difference between the parameters "Outside gHe tank(psig)" and "PT501 (A or B or both)" using https://e906-gat1.fnal.gov/data-summary/e1039/target-all-auto.php
If the difference is above 65 psig, then that indicates that the purifier needs cleaning / regeneration.
Follow Cleaning QT purifier Helium-space (pumping-purging the purifier) procedure with the Target Expert.
Roots pumps setup
Checking two gHe bottles’ levels on the west-wall of the cryoplatform
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