General Principles

• DO NOT use control-c to stop a script, this can leave the instrument in an unsafe state. Use kpfconfig.SCRIPTSTOP to request a stop (also available as a button in the KPF OB GUI).

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Setting SCRIPTSTOP to “Yes” will request that the running script terminate in an orderly fashion. This may take several minutes depending on when the running script reaches a sensible breakpoint. It is important to use SCRIPTSTOP to halt a script (instead of hitting ctrl-c) because cleanup actions will be performed after a SCRIPTSTOP (e.g. turning off laps to preserve their lifetime).

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The agitator can be reenabled by simply setting the keyword to “Yes”. This should only be done by WMKO staff and should only be done if the agitator is fully functional. A broken or misbehaving agitator mechanism presents a significant danger to the science fibers.

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The cal source has likely been disabled for a reason. Reenabling it should only be done by WMKO staff with knowledge of why it was disabled in the first place.

SlewCal or Simultaneous Calibration Source is Wrong

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These two sources are set from the same place and are always kept to the same value using the kpfconfig.SIMULCALSOURCE keyword.

Solution

This value should only be changed by WMKO staff. The choice of calibration source is influenced by our desire to maintain the lifetime of the various lamps and calibration sources and by the need for warmup times on certain sources. This is not something the user should adjust, contact a WMKO Staff Astronomer if you feel it is set incorrectly.

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The detector has likely been disabled for a reason. Reenabling it should only be done by WMKO staff with knowledge of why it was disabled in the first place.

Detector Fails to Trigger Without Error

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L0 files may be deprecated when switching to fast-readout mode. The observers may find broken L1/L2 files, and the L0 files are missing green/red/CaHK components. If L0 files needed to be regenerated, it is better to write to a new directory (e.g., /sdata1701/kpfeng/DATE/new_L0 ), and inform Jeff Mader so he can ingest the new L0 files to Keck Observatory Archive.

Agitator

Agitator Sounds Wrong or Speed is Wrong

Symptom

The agitator is not working as expected. This is usually seen in the agitator speed value (see screenshots) or by listening to the sounds.

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Image Added

You can listen to the agitator mechanism via the “KPF crypt M5075” camera on the facility camera list (note this is an internal web page at Keck). In normal operation the agitator makes a regular (roughly 1-2 Hz) mechanical oscillation sound. When the bad behavior above occurred it was either silent (note there is background fan noise on that camera) or would make a single mechanical “cachunk” sound, then stop.

Problem

The motor is not initialized properly.

Solution

Initialize using:

modify -s kpfmot agitmod=pos

modify -s kpfmot agitini=no

This leaves the system in Halt mode. Initialize using:

modify -s kpfmot agitmod=pos
modify -s kpfmot agitini=yes

Vacuum

Vacuum Chamber vacuum levels rising

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