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8. With the operating magnet in either the
de-energized or the fully operated posi-
tion, the driving, arm should clear the
cutout section of the main shaft supporting
bracket by at least 1/32 inch.
9. The driving arm assembly should clear
the rear mounting plate by at least 1/32
inch.
10. There should be at least 1/64 inch
clearance between the reset spring collet
and the rear bearing of the rotonoid.
11. The time of operation for any scale
setting may be varied by sliding the copper
cup forward or backward on its shaft or
turning the driving spring collet on its
shaft.
Be Sure to tighten the set screw
, after adjustments have been made.
12. With the rotonoid de-energized, the
reset spring is prewound approximately
one-half revolution -and the driving spring
is prewound approximately three-fourths of
a turn.
13. The gap of all TX and TY unit con-
tacts should be 0.015".
14. The wipe of all TX and TY unit con-
tacts should be approximately 0.005 inch.
15. The end of the residual screw of the
TX unit should project at least 0.002"
beyond the inside surface of the armature.
16. The seal-in unit should have at least
1/32" wipe on its contacts, measured at
the end of the armature adjacent to the
contacts.
If
wipe is too small, it can be
increased by lowering the position of the
stationary contact members.
In
the final
adjustment the contacts should make ap-
prdximatelyaftlie-same liistant whe -the
armature is operated by hand.
TIME
CALm~ATION
Adjust the front cam so that it ap-
proaches the zero mark on the time cilal
scale.
The TU-1 contact should just make
when the pOinter reaches zero.
Set the time dial at its maximum
setting and with the test cii'cuit shown
iil
Fig. 6 check the time at rated voltage.
The limits should be within :±:. 5% of the dial
reading.
'If
the time is outside these limits
Timing Relays Type RPM
GEH-2031
it can be corrected by sliding the
C
JPper
cup forward or backward on the magnetic
damping element shaft or by turning the
driving spring collet on its shaft.
Moving the copper cup forward de-
creases, the time delay and moving it
backward increases the time delay. Never
move the copper cup backward enough to
strike the rear plate of damping magnet
element.
Turning the driving spring collet in a
counter clockwise direction (front view)
decrease the time delay and in a clockwise
direction increase the time delay.
RENEWAL
PARTS
It is recomm ended that sufficient quan-
tities of renewal parts be carried in stock
to enable the prompt replacement of any
that are worn, broken or damaged.
When ordering renewal parts, address
the n'earest Sales Office of the General
Electric Company, specifying the quantity
required and describing the parts by cata-
logue numbers as shown in Renewal Parts
Bulletin No. GEF-3835.
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