TB 9-6625-2204-35
(+) to C15 (fig. 1A) side of load. Set multimeter controls to measure AC V.
h. Remove jumper plug P5 from MODE C ENCODER J5.
8. Meter and Output Voltage Accuracy
a. Performance Check
(1) Position controls as listed in (a) through (m) below:
(a) AC CONTROL fully ccw.
(b) DC CONTROL fully ccw.
(c) METER SELECT switch to AC.
(d) POWER MODE switch to AC/DC.
(e) ALTITUDE DIGITIZER switch to IN.
(f) X PULSE switch to OFF.
(g) PANEL LIGHTS switch to OFF.
(h) TEST CONDITION switch to OHMS.
(i) MODE 4 LDG GR switch to UP.
(j) MODE 4 ZEROIZE switch to OFF.
(k) MODE 4 REPLY/INTERRUPT switch to REPLY.
(l) DC 4 DISPARITY/INTERRUPT switch to DISPARITY.
(m) All MODE C ENCODER SIMULATOR switches (C1, A1, C2, A2, C4, A4,
B1, B2, D2, B4, and D4 IDENT) to ON.
(2) Set 6 AMP POWER circuit breaker to ON. Adjust AC CONTROL from a 115
V ac indication on TI voltmeter. Multimeter will indicate between 109 and 121 V ac.
(3) Adjust AC CONTROL for a 1 A indication on TI ammeter. Multimeter will
indicate between 106 and 124 V ac.
(4) Set AC CONTROL fully ccw and 6 AMP POWER circuit breaker to OFF.
(5) Disconnect ac load and multimeter from TI.
(6) Connect one end of dc load (fig. 1B) to TRANSPONDER J2 pin C23, using
appropriate lead. Connect other end of dc load to TRANSPONDER J2, pins C13 and C14,
using appropriate leads.
(7) Connect multimeter across dc load using appropriate leads. Set multimeter to
measure DC V.
(8) Position controls as listed in (a) through (c) below:
(a) METER SELECT switch to DC.
(b) POWER MODE switch to DC ONLY.
(c) 6 AMP POWER circuit breaker to ON.
(9) Adjust DC CONTROL for a 28 V dc indication on TI voltmeter. Multimeter will
indicate between 26.6 and 29.4 V dc.
(10) Adjust DC CONTROL for a 7 A indication on TI ammeter. Multimeter will
indicate between 25.8 and 30.2 V dc. Set DC CONTROL fully ccw.
(11) Disconnect multimeter and connect oscilloscope to dc load, using appropriate leads.
