Dear Bruce,

Here is my response to your querries regarding UPS systems on mass
spectrometers and other electronic equipment. I have a MAPL215-50 noble
gas mass spectrometer for He, Ne, Ar measurements. I usually experience
up to 20 power outages per year and have purchased a number of UPS
systems for my mass spec and other beta-counting equipment. I have found
them invaluable. In particular, for my mass spec, I use a BEST UPS
system (4.3 to 18 KVA with external bypass switch - 208/240 VAC input
and 120/208 or 120/240 VAC output). I have had power outages of up to
several hours to my building and my UPS keeps my mass spec running just
fine. In addition the unit will condition the power coming in during
routine power supply which gets me away from any annoying line voltage
spikes. Cost of this unit when I bought it 5 years ago was on the order
of $5000, however it has been worth every penny of it.

Tom Kotzer
AECL Research
Chalk River, Ontario

> ----------
> From:         Bruce Hungate[SMTP:[log in to unmask]]
> Sent:         Wednesday, May 06, 1998 2:36 PM
> To:   [log in to unmask]
> Subject:      UPS
>
> Dear List:
>
> My colleagues and I at Northern Arizona University are shopping for a
> couple of mass specs (Delta+, Optima, or Geo).  The building they will
> be
> in experiences around 6 power outages per year.
>
> How many of you have UPSs on your mass specs?  How bad is it for the
> mass
> spec if the system suddenly shuts down due to a loss of power, and is
> it a
> big deal to get them running again?  Would you recommend them, and how
> much
> do they cost? (I've heard around 7k, which seems high to me)
>
> Thanks.
>
> Bruce Hungate
>
>
> ____________________________________________________
> Bruce Hungate
> US Embassy/AID Mexico
> PO Box 3087
> Laredo TX 78044-3087
>
> [log in to unmask]
>
> After 17 August 1998
>
> Bruce Hungate
> Assistant Professor
> Biological Sciences
> Northern Arizona University
>
> [log in to unmask]
>