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What to Expect when Calibrating APC UPS

This is probably going to be a stupid question and make you smile, but I'd feel better confirming.
We have two rather new (less than a yr old) APC UPS's (One for Each Server) that are not behaving as I believe they should.  DC server = APC Smart-UPS 1500 w/34% load and the Terminal Server is attached to the APC Smart UPS Model 750VRM2U with only 10% Load

I did see another post here about this but from what I can understand his post incomplete, he did not get the answer he was really looking for from APC. I want the Servers to be able to continue to run on Battery during a power Outage for at least 10 to 15min to see if the power will return before shutting down the servers which is the reason I purchased large UPS. I've played with the Power Chute settings and delay.. Servers are both shutting down at the same time with in a minute that the UPS goes on Battery. Any how.. I called APC on this issue and he felt I first need to Calibrate the UPS to get the accurate Run Time for the Loads on each.

My Question is: What can I expect when doing a Calibration using Power Chute from each Server? Should I be doing this only when Server is not in Active Use?  I was planning to turn off all the Event Actions that would activate the Shutdown Sequence before starting,Such as the Battery Low Event,  but I'm wondering if and when the Batteries are deeply discharged that at anytime will the Servers lose power and cause them to shutdown without much notice.

Thanks!
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CATHY-IT
Asked:
CATHY-IT
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2 Solutions
 
SteveIT ManagerCommented:
Sounds like a runtime calibration

On our servers/UPS when a runtime calibration is run the UPS simulates power failure and switches to battery power, the UPS then times how long it runs on battery with its existing load and therefore how long it can sustain its runtime in the event of switching to battery.  

If you run it when the servers are not in use to be safe the results will vary slightly from "real world" as the servers aren't taking the full amount of power they would when under stress but it will give you enough information.
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SteveIT ManagerCommented:
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snurkerCommented:
Calibration will have the batteries drain until almost empty and then refill. You need to have some draw on them to do this, but I would not run this during normal operation. During this time it should not cause the servers to shutdown, but again, I would not do this during normal operation.

I have and was fine, but if I had a choice.
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CATHY-ITAuthor Commented:
Ok.. so, if I was to Turn off the Event Actions to make sure the PowerChute didn't kick in and start the Shutdown sequense and then start the Calibartion at 4:30pm on Friday, when our office closes for the weekend, the Calibration should run fine on it's own, draining the battery and then re-charging it without interruption to the Server functions or shutting them down and then since I figure it will take at least 6 to 8hrs to recharge the batteries fully, come back in on Saturday AM.. check what calibration discovered and then see if the servers will stay running on Battery within the Delays I specify
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snurkerCommented:
That would be fine. The previous poster did make a good comment if these servers are in heavy use regularly, then doing this while not in use could skew the results a little. Personally, I feel the risk is greater than the rewards. You should not need to turn off the event actions during live calibration. APC should do this on its own.
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CATHY-ITAuthor Commented:
Should.. is the opertive word.. since I will leaving the building myself.. think I will manually turn them off.. and then just put them back on in the AM.

One more Quesition, do you know if the APC PowerChute 8.0 and 8.5 will allow me to start the calibration under Diagnostics via Remote Console connection, say if I wanted to start it later in the evening after the Tape Backup is done for Friday night?
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snurkerCommented:
I understand. This is why I am always careful.

I have not had a reason to do this via remote connection, but if you have the permissions, you "should" be able to. Just before you are going to, remote in and see if you can access and get to the point to start the calibration. If so, you will be good.
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CATHY-ITAuthor Commented:
If we were to have a Power Outage, there are only two workstations at this time that have their own UPS, so the Load would decrease regardless, and Remote Office connections are random and not overly heavy on the Terminal Server, just be more letting them know TS is on Battery and time for them to get off the Terminal Server, assuming they still have power at the remote office as well.

Thank you for all your info.. and I tend to be more on the Careful side and try never to make assumptions..
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CATHY-ITAuthor Commented:
Both answers were good...Snurker answered my other related question.. Thanks to both of you!
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