How to manage Power Outage (as of 07/09/01)

For FOCAS Main body

• In the instrument-storing unit (the stand-by room) or at the telescope focus unit, the power will be backed up by UPSs in case of power outage.
• At the telescope focus unit, the UPS is further backuped by the generator.
• At the storing unit, no generator supply will be expected.
• In case of unexpected power failure at FOCAS (troubles in UPS backups, UPS overload, accidental power line cut, etc.)

• The master breaker will be turned off if any power connected to FOCAS is disconnected for some reason. Thus, all operations of computer, cooler, and so forth will come to stop. When this happens, daycrew members or operators must turn on the power in the power box manually to resume the power since the main power of FOCAS will not recover even if it is temporarily recovered by a momentary disconnection.
• However, make sure you check the temperature and the vacuum of dewar before turning the power back on. Depending on the time spent under the power outage, the CCD dewar (which is obviously most sensitive to damage) needs careful treatment if the temperature and/or vacuum became higher than the normal operating conditions during the outage.
• Please follow the procedure below.
  • Check if the FOCAS power is really down. The displays on the thermometer and vacuum (Refer to C for the locations) should be OFF if it is down.
  • If the main power of FOCAS is down, do the followings.

1. Open the power panel on the side of FOCAS (The creamy colored box right below the automatic connector) and turn off all the breakers except those of MAIN, CONTROL, HUM/VALVE.
2. Turn on the master switch located outside the power panel. (Press the red button.)
3. Check the temperature in the thermometer of the dewar (creamy color) at the bottom part of FOCAS (approx. 10cm from ground) and the air pressure in the vacuum gauge (silver color) at the back of the thermometer (approx 30cm from ground). Make sure you always remove the covers (usually a thick paperboard taped around with opaque tape or the vinyl tape on the display board) attached in order to avoid the leaking of light.
4. It is dangerous that the air from outside may enter inside the dewar as power outage occurs when pumping vacuum with an external vacuum pump in the storing unit or at the Cassegrain focus after the instrument was placed. Close immediately one of the two vacuum valves (yellow color) at the bottom of FOCAS (10cm from the ground) that is closer to the main body if the temperature was low (<-10C~-100C) and the vacuum reading is high (>1E-4 torr). There is no need to worry if the temperature is low but the vacuum reading is good (<10E-5 torr).
5. Please report the temperature, vacuum pressure, and the operation done in 4 (if any) to a FOCAS member (Rep. Ohyama). He will ask for startup of an external vacuum pump, startup of ion pump, startup of cooler, reset of Messia, startup of computer, and etc, according to the circumstance.

• It is dangerous when using an external vacuum pump even if the main power of FOCAS is maintained through UPS/generator backup, because most vacuum pumps use the power that is not backed up. If the pump seemed to have stopped, execute the procedures, C, D, and E, (skip A and B) without disconnecting the power.
• Please inform FOCAS team member (Rep. Ohyama) if the power outage seems to last longer than 30 minutes, which is the possible backup time of UPS in the storing unit. He will shut down FOCAS beforehand. (Please follow 2 if using an external vacuum pump.) If you cannot make any contact, it means that nothing is being done; Leave it alone.

For OBCP (focas.sum.naoj.org)

• It should be shut down automatically. If it does not, log into KVM and execute shutdown.

For FOCANA (focana.sum.naoj.org)

• It should be shut down automatically. If it does not, shut down from the console located on rear right in the observation room on the 3rd floor. It is a WS used for analysis, so you can execute shut down immediately. I will inform you of the password some other time.

For Laser Slit Cutter

• There is a laser slit cutting unit on the right side in the back of the instrument laboratory. The powers of 2 computers and the main body of laser cutter will be turned off. Please do not worry about operating anything since it is of no danger.