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” |