Variable Interlocks

“Bad” status

Action

Initial Values

Test


Bias Voltage

V_PS < abs(Vset_LO
)

Turn off detector (bias off and CCD Power  off)

Vset_LO = -40V

Set bias setpoint to -45V 

Sensor Temperature

T_CCD > T_CCDHI

T_CCD < T_CCDLO

Turn off detector (bias off and CCD Power  off)

Turn off Cryotel 

T_CCDHI = 30C

T_CCDLO = -110C

Set target temp to 35C/-115C 

Water flow (via Thermotek chiller)

Flow < Flow_LO

Turn off detector (bias off and CCD Power off)

Turn off Cryotel

Flow_LO = 1 LPM (usually runs at ~1.9LPM)

Set chiller to STANDBY while detector on. 

Chamber Vacuum 

P > P_HI

Turn off detector (bias off and CCD Power off)

Turn off Cryotel

Set PID temp setpoint to 15C (to warm up)

P_HI = 1E-5 Torr

Change 

Handshake/Heartbeat

COMM stops 60 secs

Turn off detector (bias off and CCD Power off)

Turn off Cryotel

OK

“Rewrite the appropriate PVs”


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