TB 9-6625-1998-24
WARNING
HIGH VOLTAGE is used or exposed during the performance of
DEATH ON CONTACT may result if
personnel fail to observe the safety precautions. REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Set POWER switch to OFF.
b. If OUTPUT RMS (VOLTS RMS) meter does not indicate on mark or 0, adjust
screw located below meter face until meter indicates on mark or 0.
c. Connect TI to a 115 V ac power source.
d. Position controls as listed in (1) through (6) below:
(1) FREQ RANGE MULTIPLIER switch to X10.
(3) OUTPUT CONTROL fully ccw.
(4) ATTENUATOR switch to X10 V.
(5) FREQ METER switch to OFF (AN/URM-127 only).
(6) 1 k
LOAD switch to OUT (AN/URM-127A only).
e. Set POWER switch to ON and allow at least 15 minutes for TI to reach
operating temperature.
a. Performance Check
(2) Connect resistance standard (adjusted to 1000 ) to OUTPUT.
Connect
(3) Adjust OUTPUT CONTROL until OUTPUT RMS (VOLTS RMS) meter
indicates 1.0. If multimeter does not indicate between 9.5 and 10.5 V ac, perform b below.
NOTE
Perform (4) through (7) below for AN/URM-127A only.
(4) Temporarily disconnect resistance standard from equipment setup by removing
cables from resistance standard.
(5) Set 1 k
LOAD switch to IN.
(6) Adjust OUTPUT CONTROL until TI VOLTS RMS meter indicates 1.0.
Multimeter will indicate between 9.5 and 10.5 V ac.
(7) Set 1 k
LOAD switch to OUT and reconnect cables to resistance standard.