Skip to content. | Skip to navigation

Personal tools
You are here: Home Telescopes Magellan Operations homepage How To...Procedures Emergency shutdown procedures How to shut down telescope

How to shut down telescope

Powering down procedure for the Magellan Telescopes and instruments (lightning storms).
Rev 5: May 28th, 2011.


In case of a night storm, telescope operators are in charge of waking up the needed personnel and of starting the procedure.

A. Baade.

Control room: In case not previously done, lower primary mirror, close mirror covers, louvers, dome, park the telescope, stop the HPU. Take windscreen and moonroof to 99%. Take FP2 Rotator (FIRE) to 0 degrees. Take NASE rotator (FOURSTAR) to -60 degrees.

Suggestion for saving time: Step 2 could be carried out by the Telescope Operator, step 3 by the Instrument Specialist, and steps 4 and 5 by the Electronic or the Programmer.

Control room:
Exit all computers programs and turn off control room computers.
Shutdown all instrument GUIs.
Shutdown and turn off all Linux and MAC computers.

Equipment room:
Shutdown and power off the CCD servers.


FourStar:
A. Login and shutdown all computers in the equipment room.
B. Unplug the equipment rack for lightning protection


FIRE:
A. Ensure that the detectors have been powered down fully per instructions from FIRE document 33-09003 (Rev A).
B. Power down and disconnect Pele as well as the two Windows computers.

Telescope:

FourStar:
A. Switch off both electronics racks on the instrument (switches with red plastic covers).
B. Disconnect the 117VAC twist-lock power connector at the front of the instrument.

IMACS:


A. If MMTF in use, take it to ‘balance’ and then power off the CS100 controller.
B. Switch off the UPS power strip in the high area of left electronics rack. Control and CCD electronics get powered off.
C. Switch off the power strip labeled ‘Tel power’ in the high area of left electronics rack. Instrument motors get powered off.
D. Disconnect CCD cables from saddlebags for lightning protection.
E. Unplug UPS power cord for lightning protection.
F. Power off Cryotigers, if applicable.

FIRE:
A. Do not turn off power to the FIRE cryocooler. This unit should run straight through to keep the instrument cold. If an electrical strike hits, there is a circuit breaker internal to the compressor that should trip as protection (plus it is behind the 208V UPS). We want this on to keep the instrument cold.
B. At the folded port, turn off the ion pump (at the bottom of the electronics rack) (Figure 3).
To switch off the pump, first record the starting pressure. Then, close the gate valve located between the ion pump unit and the dewar. Then press the button at the bottom left of the control panel reading “HV1 On/Off”. Finally, turn the rocker switch labeled “Enable HV” to the “off” position.
C. Record the system temperatures from the Lakeshore units and the pressure from the Convectron.
D. Unplug the entire equipment rack. The rack is run from a single 120V utility.

  • Control room: Switch off breaker #18 in panel B13. This action powers off the TESS system, removing direct power from most of the telescope systems.


In the dome. Switch off breaker #5 in the UPS Power AZ sub-panel (on the telescope floor). Primary mirror cell gets unpowered.

  • Equipment room: After all instruments are off, switch off the main breaker located on the higher area of panel B16 (Baade). This removes UPS power from the whole telescope.

  • Equipment room: Take the ‘Line/Off/UPS’ UPS Bypass Switch at the left of panel B16 to its ‘Off’ position. This action interrupts both the live and the neutral lines.


  • Equipment room: If the telescope UPS is also going to be protected (removing its feeding direct power), switch the ‘AC Line Disconnect Switch’ next to the ‘UPS Bypass Switch’ to its ‘Off’ position.

Leave running: FIRE’s UPS (for cryocompressor and glycol pump), and the Cryotigers’ UPS. Both are located in the tunnel.


B. Air compressors room, Telescope Chillers and HVAC Chillers.
Could be carried out by the Electronic on his way up to the telescopes. No need to wait for steps A, C, or D.

Telescope Chillers: Stop all compressors (Pumpdown Run switches 1/2/3/4 to ’off’). Then take the Hand/Off/Auto switch to ‘Off’ (down at the right). Only after all compressors have stopped, switch the main power handle to ‘Off’. This also removes power from the electronics (control PLC and monitoring system).

HVAC Chillers: Telescope Chillers procedure, considering that this system has 6 compressors.

Air compressors room: Turn off the air compressors that are running. Close opened valves. Leave the output valve of the big tanks open (so primary mirrors can finish lowering, if not already down).

Air compressors room: Switch off the Main (general) 225A breaker in the lower area of the left electrical panel. Compressors get unpowered.

Air compressors room: Switch off the Main (general) 100A breaker in the right-bottom area of the right electrical panel.
This action removes power from all the electronic devices (DGHs, Adam, Comtrol unit, media converter, etc.), and the drier towers and their related electronics.


NOTE: Don’t restore power to the systems or equipment without going through the  ‘Powering up procedure for the Magellan Telescopes’,  which considers some preventive measures for avoiding known problems. Powering down procedure for the Magellan Telescopes and instruments (lightning storms),  continued. Rev 5: May 28th, 2011. 


C. Clay.

Control room: In case not previously done, lower primary mirror, close mirror covers, louvers, dome, park the telescope, stop the HPU. Take windscreen and moonroof to 99%.

Suggestion for saving time: Step 2 could be carried out by the Telescope Operator, step 3 by the Instrument Specialist, and steps 4 and 5 by the Electronic or the Programmer.

Control room: Exit all computers programs and turn off control room computers.
Exit all computers programs and turn off control room computers.
Shutdown all instrument GUIs.
Shutdown and turn off all Linux and MAC computers.

Equipment room:
Shutdown and power off the CCD servers.
MMIRS/MEgaCam: Shutdown all computers in the equipment room.

Telescope:

MMIRS

A. Open front door of each rack and turn off the main switch on each of the two Pulizzi power controllers in each rack. Close and latch rack doors.
B. Unplug two Hubbell power connectors (quiet power and scroll pump).

MegaCAM
A. Switch off  the 5 power switches on the instrument (3 on one side, two on the other)
B. Unplug power connector.

PFS
A. Switch off the CCD power supply (Lab power supply on a tray under the instrument’s enclosure).
B. Switch off the control electronics (black switch on the back of the PLC cabinet).
C. Disconnect CCD cables from saddlebags for lightning protection.
D. Unplug UPS power cord (from the wall outlet) for lightning protection.

MagE
A. Switch off breaker #18 in the UPS Power AZ sub-panel (on the telescope floor). Control and CCD electronics get powered off.
B. Disconnect CCD cables from saddlebags for lightning protection.
C. Unplug UPS power cord for lightning protection.
D. Power off Cryotiger, if applicable.

LDSS and MIKE
A. Switch off the CCD power supply on the hand rail of the platform.
B. Switch off the control electronics.
C. Power off Cryotigers, if applicable.
D. Disconnect CCD cables from saddlebags for lightning protection.
E. Unplug UPS power cord for lightning protection.


MagIC
A. Quit LOIS
B. Turn off power to the CCD electronics boxes on the platform
C. Turn off power to the filter wheel
D. Power down the Sun computers (first make sure that the disks are synced)
E. Power down the PC104
F. Turn off power to the Cryotiger, if applicable.
G. Powered-down equipment should be unplugged to prevent lightning surge damage

Control room: Switch off breaker #25 in panel B23. This action powers off the TESS system, removing direct power from most of the telescope systems.

In the dome: Switch off breaker #7 in the UPS Power AZ sub-panel (on the telescope floor). Primary mirror cell gets unpowered.

Equipment room: After all instruments are off, switch off the main breaker located on the higher area of panel B26 (Clay). This removes UPS power from the whole telescope.

Equipment room: Take the ‘Line/Off/UPS’ UPS Bypass Switch at the left of panel B26 to its ‘Off’ position. This action interrupts both the live and the neutral lines.

Equipment room: If the telescope UPS is also going to be protected (removing its feeding direct power), switch the ‘AC Line Disconnect Switch’ next to the ‘UPS Bypass Switch’ to its ‘Off’ position.

Leave running: The Cryotigers’ UPS, which is located in the tunnel.


D. Magellan auxiliary building.

Shutdown and power off the instruments in the building, according to the directions in part C (Clay).

Transformers room: After all instruments in the building are off, switch off all the breakers in panel B03 (it does not have a general breaker). This removes UPS power from the whole building (including the CISCO 6500 Router and the DNS computer).

Transformers room: Take the ‘Line/Off/UPS’ UPS Bypass Switch at the left of panel B03 to its ‘Off’ position. This action interrupts both the live and the neutral lines.

Transformers room: If the UPS is also going to be protected (removing its feeding direct power), switch the ‘AC Line Disconnect Switch’ next to the ‘UPS Bypass Switch’ to its ‘Off’ position.

NOTE: Don’t restore power to the systems or equipment without going through the  ‘Powering up procedure for the Magellan Telescopes’, which considers some preventive measures  for avoiding known problems. 



Document Actions