121192-P1
Rev A, 6/97
Supplement 1
EO 10510
MKS Type 651C
Pressure Controller
Supplement 1
This supplement contains important information about the valve failsafe battery
back-up option for the 651 controller. Specifically, it provides instructions on how to
check your controller to ensure that it recognizes when the battery back-up module is
present, and how to configure the valve position upon a power loss when using either
Local or Remote operation.
Please read the information carefully and make the following additions to your 651C,
Revision E instruction manual (MKS p/n 115605-P1).
Six Shattuck Road
Andover, MA 01810-2449
(800) 227-8766 or (508) 975-2350
Fax: (508) 975-0093
E-mail:mks@mksinst.com
Web site: http://www.mksinst.com
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