MODS Calibration Lamp Change Log

Fill out the table below every time you change a calibration lamp, regardless of whether it is an emergency replacement on-telescope or a planned preventative-maintenance replacment.

A lamp exchange action is not complete until the log below is updated.

Note that if you replace one of the Pen-Ray wavelength comparison lamps, you need to file an IssueTrak report with next-action the MODS support astronomer to purchase and stock its replacement on the mountain.

Also remember to complete (and if possible, close) any open IssueTrak reports that required a lamp exchange as next-action.

Calibration Lamp Change Log

Add your new entry at the BOTTOM of the table. One entry per lamp changed. Designations:

• VFLAT = incandescent variable-intensity flat-field continuum lamp
• QTHn = Quartz-Tungsten-Halogen continuum lamp (note n=1 or n=2, e.g., QTH1)
• Hg(Ar) = Hg(Ar) Pen-Ray comparison lamp
• Ne = Neon Pen-Ray comparison lamp
• Ar = Argon Pen-Ray comparison lamp
• Xe = Xenon Pen-Ray comparison lamp
• Kr = Krypton Pen-Ray comparison lamp

If there are any notes (e.g., "lamp blackened", "pen-ray lamp pigtail cord twisted/broken"), please note it in the last column

Date	Instrument	Calib Lamp	Initials	Notes
2012 Aug 14	MODS1	VFLAT & QTH1	rwp/ts	Planned summer maintenance replacement
2015 Sep 27	MODS2	Ne	JP	Burnt out? Removed source placed in box labeled POGGE - MODS TOOLS in cabinet #3 on 3U.
2016 Jan 5	MODS2	Hg(Ar), Ar, Xe, Kr	JP	Exchanged lamps for the flight lamps into MODS2 (Ne was exchanged in Sept). Lab lamps in cabinet on 3U, marked with date.
2017 Aug	MODS1/2	VFLAT	dpp	Changed VFLAT lamps on MODS1 and MODS2, documented procedure for handover documentation
2018 Sep	MODS2	Ne	es	Changed Ne on MODS2 as it was noted to be slow to light
2018 Oct	MODS2	VFLAT	es	Replaced VFLAT lamp on MODS2. Ongoing problems with lamp intermittently failing (IT 7009). Problem continues with new lamp
2018 Nov	MODS1	QTH1	es	QTH1 on MODS1 had burnt out (IT 7461).
2020 Jun 2	MODS1	Ne	dr/opk	Replaced Ne on MODS1 (IT 8107). Took Ne lamp from LUCI cabinet, no spare found in MODS cabinet
2021 Apr 6	MODS2	Ne	jm	Replaced Ne on MODS2 (IT 7869). Took Ne lamp from MODS spares cabinets on 3U, one spare remaining. Old lamp placed in box and labeled, placed with other removed lamps in spares box.
2022 Mar 3	MODS1	Ne	cb,js	Chris Bolyard replaced the Ne lamp and its power supply
2022 Mar 3	MODS2	Ne	dr,js	Dan Rapoza replaced the Ne lamp and its power supply

-- RichardPogge - 14 Aug 2012