TM 9-4935-282-34
803D
(9)
500 VAC High Frequency Adjustment.
meter needle is within 30 microvolts (1-1/2 small divisions) of
(a) Apply 500 volts AC at 10 kilocycles to
null. Use R533 for final touch up trying to keep control in
center third of its mechanical range.
(b) Adjust 500 VAC HF TRIM control C501
Note position of meter needle.
until meter needle is within 30 microvolts (1-1/2 small
(12) 50 VAC High Frequency Adjustment.
divisions) of needle position noted in (8).
(a) Apply 50 volts AC at 10 kilocycles to
(10) 500 VAC Attenuator Check.
(a) Apply 500 volts AC at 400 cycles to
(b) Adjust 50 VAC HF TRIM control C523
until meter needle is within +30 microvolts (1-1/2 small
divisions) of needle position noted in (11).
(b) If meter needle is not within 50
(13) 50 VAC Attenuator Check.
microvolts (2-1/2 small divisions) of null, adjust 500 VAC
(a) Apply 50 volts AC at 400 cycles to
ATTEN FINE ADJ control R544 and repeat (9) before
continuing with (11).
(11) 50 VAC Attenuator Adjustment.
(b) If meter needle is not within +50
microvolts (2-1/2 small divisions) of null, adjust 50 VAC ATTEN
(a) Set RANGE switch to 50 volt position.
FINE ADJ control R533 and repeat (12). This completes AC to
(b) Apply 50 volts AC at 400 cycles to
DC converter calibration.
(c) Adjust 50 VAC ATTEN COARSE ADJ
control R50 and 50 VAC ATTEN FINE ADJ control R533 until
4-8
