2023 Jul/27-Aug/08
Since August/8 (9:00):
The pump motor is running almost continously.
Since August/1:
The "goosing" continues (even at lower outside temperature).
The difference between glycol-supply and glycol-return is unusually
large, indicating a low glycol flow. Since the pump motor has recently
been replaced, a faulty impeller might be the cause.
July/29:
Glycol: I=0.3
July/27:
A power-cycle of the PLC (when the instrument was moved from storage
to the telescope platform) appears to have fixed the temperature control.
Since July/11:
Glycol: Pg=2.0, I=0.3, F=-0.400+0.0470*(SetP-Tout)+"GTC" GTC = (glycol_supply-glycol_return-0.410)/2 - 0.021*MAX(0,Tout-17.0) Air: Pa=15.0, Da=10.0 DHT = +0.270 PMT = -0.105 LN2(bank) = 0.75 LN2(cap) = 0.65
