HEB temperatures slowly rising

If the HEB temperatures are slowly rising, first confirm that the glycol flow and temperatures are ok. If so, then the thermo electric device (TED) may be off.

How to check TED Status and power cycle if necessary:

The thermoelectric device (TED) power status can be checked via a terminal isisCmd. If the terminal is on an obsN machine, it will be necessary to distinguish which mods commands are beings issued for.

If accessing through mods1data or mods2data:
  1. On the MODS kvm in CRB, select the mods data machine associated with the mods of interest, either mods1data or mods2data.
  2. Open a terminal or use on of the existing terminals on the desktop. A terminal can be opened by right-clicking in the background. This will bring up a menu. From this menu select "terminal".
  3. To check TED power status, in this terminal, type:
    >isisCmd m1.bc tedpower
    where m1.bc can be replaced with m1.rc, m2.bc, or m2.rc, depending on which CCD electronics you are noting the temperature rise on. Make sure that if you are on mods2data that you look at the associated m2.bc or m2.rc, and similarly or mods1data. This isisCmd will return: "DONE: TEDPOWER TEDPower=ON" if the thermoelectric device is on, otherwise it will need to be turned on or power cycled. Proceed to step 4 if that is the case.
  4. To power cycle the TED, typed in the terminal the following:
    >isisCmd m1.bc tedpower off
    >isisCmd m1.bc tedpower on
    where m1.bc can be replaced with m1.rc, m2.bc, or m2.rc, depending on which CCD electronics you are noting the temperature rise on. Then once again check the status of the TED by following step 3 above.
If accessing through a terminal on an obsN machine:
  1. On and obsN machine open a terminal or use on of the existing terminals on the desktop. A terminal can be opened by right-clicking in the background. This will bring up a menu. From this menu select "terminal".
  2. To check TED power status, in this terminal, type:
    >isisCmd --mods1 m1.bc tedpower
    where mods1 can be replaced by the mods2 if the issue is on that mods instead, and m1.bc can be replaced with m1.rc, m2.bc, or m2.rc, depending on which CCD electronics you are noting the temperature rise on. Make sure that if you are looking at mods2 that you look at the associated m2.bc or m2.rc, and similarly or mods1. This isisCmd will return: "DONE: TEDPOWER TEDPower=ON" if the thermoelectric device is on, otherwise it will need to be turned on or power cycled. Proceed to step 3 if that is the case.
  3. To power cycle the TED, typed in the terminal the following:
    >isisCmd --mods2 m2.rc tedpower off
    >isisCmd --mods2 m2.rc tedpower on
    where mods1 can be replaced by the mods2 if the issue is on that mods instead, and m1.bc can be replaced with m1.rc, m2.bc, or m2.rc, depending on which CCD electronics you are noting the temperature rise on. Then once again check the status of the TED by following step 2 above.
Why do we see this issue?

Each time the HEBs are power cycled, this will shut off the ion gauge (igpower), the thermoelectric device (tedpower), and can leave the LED in and unknown state (ledpower). restarting the ic's will take care of these 3 items. Running the observing script modsWake.pro will also address these 3 issues. If the ted is off, you may also want to check the status of the ion gauge. It is essentially the same procedure as listed above for the TED, but replace tedpower with igpower in the isisCmd.

-- %USERSIG{JenniferPower - 2015-05-18}%

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Topic revision: r1 - 18 May 2015, JenniferPower
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