[GreenKeys] Q: Using a Polar Relay Test Set

[Nick England]

Howdy friends -
I recently picked up an AN/UGM-10 (TM Systems 904A) polar relay test set.
It seems handy, but I'm not sure how to use it -
Here is the front panel
http://www.navy-radio.com/tty/test/ugm10-1705-10.JPG
http://www.navy-radio.com/tty/test/ugm10-1705-11.JPG
http://www.navy-radio.com/tty/test/ugm10-1705-12.JPG

Meter #1 - AC ma 0-5, 0-50
Drive voltage switch - Low (50ma), Med (50ma), High (5ma)
AC drive - rheostat
Coil switch - 3-2, 1-8, Both
Function switch - Sensitivity, Cal/Bias, Bias, Break, Cal/Break, HiPot
Sensitivity - rheostat
Cal - rheostat
Meter #2 - 0 center,
               ranges +/- 1 ma, +/- 2.5 ma, +/- 10 ma, +/- 25%

So any hints on how to use such a machine? No manual to be found, of course.

Thanks
Nick England K4NYW
www.navy-radio.com
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