between 57 and 62 Hz, generator
set meter shall read within 1
percent of the generated frequency
(to the right). The error at any point
on frequency meter shall not be
greater than 1 percent.
(c) If the above requirements are not
transducer as a matched set.
(2) Transducers A107 and A108 (7, figure 15-3) are
tested as follows:
HIGH VOLTAGES PRESENT DURING TEST.
OR SEVERE BURNS MAY RESULT IF PERSONNEL
FAIL TO OBSERVE SAFETY PRECAUTIONS.
(a) Connect transducer
(either A107 or A108) as shown in figure
15-7, using test equipment as shown.
(b) Adjust T1, T2, and T3 to their minimum
position, fully counterclockwise.
(c) Close S1 and open S2 and S3.
(d) Energize 120/208V AC 3 phase, 4 wire,
60 Hz power source.
(e) Adjust T1 until 0.7 ampere is indicated on
ammeter A1. At this point, the percentage of RATING
METER shall indicate 33 percent.
(f) With S1 closed, close switch S2, and
adjust T2 until 0.7 ampere is indicated on ammeter A2.
The percentage of RATING METER shall indicate 66
(g) With S1 and S2 closed, close S3. Adjust
T3 until 0.7 ampere is indicated on ammeter A3. The
percentage of RATING METER shall indicate 100
(h) If requirements of steps (e), (f), and (g)
are not met, replace the transducers.
b. Replacement. Transducers A103, (26, figure
High Coolant Temperature
High Oil Temperature
Low Oil Pressure
Low Fuel Level
A107 and A108 (7), are removed from the plate
assembly (30) by disconnecting and tagging
wires. Remove transducer (26) by removing four
screws (24) and nuts (25). Remove both
transducers (7) by removing screws (5) and nuts
15-10. ANNUNCIATOR CONTROL ASSEMBLY A20 (13,
figure 15-3). The annunciator control relay assembly
contains four terminal boards, 20 diodes, and 13 relays: