Tuesday, April 17, 2012

System Power Draw

Did a rough measurement this morning of the current drawn by the EXES racks as various items were turned on.

Bottom line:  Lots of headroom on the 2kVA UPS supply.

System draws about 6.5A total (absent the cal source supplies), which would be ~0.78kVA if we just multiply by 120V.

Here's a rough listing:

PC Host computer:  2A (momentary 4A on startup)
eBox supply:  2A
macmini + monitor:  1A
Lakeshore:  0.5A

Pot power supply + agilent + motor boxes + network switch < 0.5A total

The resolution on the current meter was only 0.5A, so these numbers are not precise below that level.  Hard to see where we'll have a problem that would require us to use any of the non-UPS power.

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