TB 9-6625-975-35
8. Meter Range
a. Performance Check
(1) Connect LINE and GROUND terminals of TI together, using lead and adapters
(B4, B1, and B2).
NOTE
The meter pointer may stand anywhere over the scale until TI
is operated.
(2) Rotate generator crank cw at normal operating speed.
Meter will indicate
ZERO.
NOTE
To obtain a correct indication on TI meter, the hand-operated
generator crank must be rotated cw at normal operating speed.
The generator reaches operating speed when centrifugal clutch
begins to slip
(3) Disconnect shorting lead from LINE and GROUND terminals and rotate
generator crank. Meter pointer will indicate INFINITY.
b. Adjustments. No adjustments can be made.
9. Voltage Check
a. Performance Check
(1) Connect digital voltmeter (A1) positive dc terminal to GROUND terminal and
common terminal to GUARD or SHIELD terminal, using leads and adapter (B3, B4, B1,
and B2).
indicate between 475 and 525 V dc (450 and 550 V dc for ZM-21( )/U having electronic
generator), perform b below.
b. Adjustments
(1) Remove TI chassis from case and remove chassis cover.
(2) If voltage is too high, loosen the four clutch self-locking nuts (fig. 1) equally,
between the clutch drive hub and clutch driven hub. Repeat a(2) above until correct
voltage is obtained.
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