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Rack Power ONOFF procedures » History » Version 10

Sowjanya Gollapinni, 08/21/2015 05:00 PM

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h1. Rack Power ONOFF procedures
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*Who does this:* In the normal mode of operation, it is expected that ONLY sub-system experts (most probably on-call experts) will do the power off for their respective sub-systems. It is only in their absence and upon approval from the run coordinator that others will be allowed to do this.
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*Step 0:* Go on the platform, with all requirements: Hard hat, closed-toed boots, and most importantly, Two-person rule!
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h2. Readout Electronics Racks Power-Off/On Procedure for Planned Power Outages
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*Step 1:* Make sure the software DAQ/read-out processes are not running. In other words, this means that the platform power off procedure should ONLY be done AFTER the DAQ/read-out processes are brought down gracefully by the DAQ experts. Confirm from the On-call DAQ expert and the uB operator on shift that this is the case before proceeding.
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*Remember, the following racks should be powered off in the following order, and following indicated steps*
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*Side note:* For reference, we are following the reverse of the prescription as written in
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 http://microboone-docdb.fnal.gov:8080/cgi-bin/RetrieveFile?docid=3825&filename=TPC-R1_Power-up.pdf&version=10 
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*1. TPC-R2 through TPC-R5 power off:*
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a. Switch off both Wiener PS using the red toggle switch on the front panel (gently push down the toggle switch for 3 seconds until the display turns off).
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b. Switch off the middle (CB2) and lowest (CB3) circuit breaker (circuit breaker switches have blue LEDs lit on them) by accessing the back side of the rack; verify fans are off.
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c.  Switch off top (CB1) circuit breaker; verify NetGear network switch inside rack is off.
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d. Switch off Slow controls using front panel switch on the slow controls panel (gently pull the Chassis on/off switch and press down). The +5V, +3.3V, and RPS Status LEDs should turn off.
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e. Switch off the RPS (use switch located on the back panel of the RPS unit). Go behind the racks and use a step stool to reach, if needed; verify the AC Output ON, POWER, SENSOR, and ALARM LEDs on the AC Switch Box are off.
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f. Only the AC Input Good LED on the AC Switch Box should be ON.
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*2. TPC-R1 power off:*
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a. Switch off Wiener PS using the red toggle switch on the front panel (gently push down the toggle switch for 3 seconds until the display turns off).
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b. Switch off the lowest (CB3) circuit breaker; verify fans are off.
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c. Switch off the middle (CB2) circuit breaker; verify NetGear network switch inside rack is off.
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d. Switch off Slow controls using front panel switch on the slow controls panel  (gently pull the Chassis on/off switch and press down). The +5V, +3.3V, and RPS Status LEDs should turn off.
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e. Switch off the RPS (use switch located on the back panel of the RPS unit). Go behind the racks and use a step stool to reach, if needed; verify the AC Output ON, POWER, SENSOR, and ALARM LEDs on the AC Switch Box are off.
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f. Only the AC Input Good LED on the AC Switch Box should be ON.
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*3. LIZ Rack power off:*
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a. Switch off the two NIM bins using their front panel switches.
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b. Switch off the function generator (Strobe pulser) using its front panel on/off button.
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c. Switch off the fan switch on the fan front panel; verify the fan is off.
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d. Switch off the middle (CB2), top (CB1), and bottom (CB3) circuit breakers. 
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e. Switch off Slow controls using front panel switch on the slow controls panel  (gently pull the Chassis on/off switch and press down). The +5V, +3.3V, and RPS Status LEDs should turn off.
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f. Switch off the RPS (use switch located on the back panel of the RPS unit). Go behind the racks and use a step stool to reach, if needed; verify the AC Output ON, POWER, SENSOR, and ALARM LEDs on the AC Switch Box are off.
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g. Only the AC Input Good LED on the AC Switch Box should be ON.
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*4. PMT/TRIG Rack power off:*
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a. Switch off Wiener PS using the red toggle switch on the front panel (gently push down the toggle switch for 3 seconds until the display turns off).
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b. Switch off the NIM bin using its front panel switch.
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c. Check that the PMT HV (CB3) bottom circuit breaker is off. If not, stop and call a PMT HV expert. 
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d. Switch off the middle (CB2) circuit breaker; verify the fan is off.
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e. Switch off the CB1 circuit breaker; verify NetGear network switch inside rack is off.
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f. Switch off Slow controls using front panel switch on the slow controls panel  (gently pull the Chassis on/off switch and press down). The +5V, +3.3V, and RPS Status LEDs should turn off.
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g. Switch off the RPS (use switch located on the back panel of the RPS unit). Go behind the racks and use a step stool to reach, if needed; verify the AC Output ON, POWER, SENSOR, and ALARM LEDs on the AC Switch Box are off.
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h. Only the AC Input Good LED on the AC Switch Box should be ON.
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5. Make an elog entry that the readout electronics racks have been successfully powered off.
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h2. DRIFT HV rack Power-Off/On procedure for Planned Power Outages:
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*First confirm from the On-call Drift HV expert and uB operator on shift that the DRIFT HV is ramped down as per procedure and is at 0 V.
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Do not proceed without this confirmation.*
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Step 1: After confirming the above, ensure that the Glassman is at 0 V by looking at the power supply front panel. If the power happens to be off, the voltage is 0. 
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(At this point, if a power outage occurs, it is ok from a HV health standpoint.  The remaining steps are additions for a more graceful shutdown of the entire HV rack.)
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a. After confirming Step 1, turn off the Glassman by pushing the orange on/off button on the front of the supply.
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b. Turn off the slow controls box by gently pulling the on/off switch on the front left side of the box and pushing it down. The +5V, +3.3V, and RPS Status LEDs should turn off.
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c. Switch off the RPS (use switch located on the back panel of the RPS unit). Go behind the racks and use a step stool to reach, if needed; verify the AC Output ON, POWER, SENSOR, and ALARM LEDs on the AC Switch Box are off.
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f. Only the AC Input Good LED on the AC Switch Box should be ON.
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Once done, let the uB operator on shift know that the power-off is done and make an e-log entry that the rack has been successfully powered off.
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h2. LASER racks Power-Off/On procedure for Planned Power Outages:
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*First confirm from the On-call LASER expert and uB operator on shift that the LASER is off and the Laser computers that are in the rack are also gracefully brought down. 
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Do not proceed without this confirmation.*
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a. After confirming above, ??
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b. Turn off the slow controls box by gently pulling the on/off switch on the front left side of the box and pushing it down. The +5V, +3.3V, and RPS Status LEDs should turn off.
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c. Switch off the RPS (use switch located on the back panel of the RPS unit). Go behind the racks and use a step stool to reach, if needed; verify the AC Output ON, POWER, SENSOR, and ALARM LEDs on the AC Switch Box are off.
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f. Only the AC Input Good LED on the AC Switch Box should be ON.
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Once done, let the uB operator on shift know that the power-off is done and make an e-log entry that the rack has been successfully powered off.