Gas has run out
Over the course of a beamtime it is highly likely that you will need to replace the gas bottles.
Argon is used to cool the PCO (imaging camera) while helium is used to fill up the KB mirror housing to prevent oxidation of the KB mirrors.
The PCO gas (Argon Technical Grade) should flow at 1.7 SCCM
The KB Gas (BIP Helium) should flow at 3.5 SCCM
Check regulators on the bottles themselves.
If gas has run out call EHC’s to replace (8787) – let them know which gas and which grade (Argon – Technical, Helium – BIP).