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If it is found during installation or periodic testing that the relay is out of
calibration, recalibrate as follows:
RELAY CONTACTS
Checks and Adjustments
The clearance between (a) the back of the silver stationary contact mounted on the
flat spiral, and (b) the diaphragm behind it, should be 0.004 inch to 0.009 inch.
This wipe should be measured by moving the contact arm over until it just touches
the appropriate stationary contact.
rotate the barrel until the back of the contact touches the diaphragm.
barrel 450 corresponds to 0.004 inch wipe, while 1050 is the equivalent of 0.009
inch.
The contact gap may be adjusted by loosening slightly the screw at the front of the
contact block.
The screw should be loosened only enough to allow the contact barrel
to rotate in its sleeve.
The contact gap should be 3/64 inch.
manner:
with the contact arm parallel to the sides of the relay, turn the contact
barrels until both contacts are just made (use neon lamps to verify).
clamping screw, locking the right-hand barrel.
barrel 1� revolutions (540 0) and tighten its clamping screw.
To change the stationary contact mounting spring, loosen the screw at the front of
the contact block, then remove the contact barrel and sleeve as a complete unit.
Unscrew the cap (E).
removed. See Figure 6.
The moving contact may be removed by loosening the screw that secures the moving
contact to the contact arm and sliding the contact from under the screw head.
Cont act Clea ning
A flexible burnishing tool should be used for cleaning relay contacts.
flexible strip of metal with an etched-roughened surface, which in effect resembles
a superfine file.
scratches are left on the contacts, yet it cleans off any corrosion thoroughly and
rapidly .
The flexibility of the tool ensures the cleaning of the actual points of
contact.
Fine silver contacts should not be cleaned with knives, files, or abrasive paper or
cloth.
Knives or files may leave scratches that increase arcing and deterioration
of the contacts.
abrasive material in the contacts and thus prevent closing.
The burnishing tool described above can be obtained from the factory.
Then, holding the contact arm in this position,
The contact and its flat spiral mounting spring may then be
The polishing action of this file is so delicate that no
Abrasive paper or cloth may leave minute particles of insulating
GEK-65525
SERVICING
This should be adjusted in the following
Back off the left-hand contact
12
Rotating the
Tighten the
This is a
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