TB 9-6625-1935-24
Test
Power meter
instrument
calibrator
Test instrument indications
Multimeter indications
RANGE (mW)
POWER(mW)
(mW)
(V)
switch
switch
settings
settings
Model 432A
Model 432B
Model 432A
Model 432B
Min
Max
Min
Max
Min
Max
Min
Max
.031
.03
0.0297
0.0303
---
---
0.9388 0.9588
---
---
.1
.1 (100 μW)
0.099
0.101
0.0995
0.1005
0.990
1.010
0.995
1.005
.31
.3
0.297
0.303
---
---
0.9388 0.9588
---
---
1
1
0.99
1.01
0.995
1.005
0.990
1.010
0.995
1.005
31
3
2.97
3.03
---
---
0.9388 0.9588
---
---
10
10
9.9
10.1
9.95
10.05
0.990
1.010
0.995
1.005
1Omit
these positions for model 432B.
b. Adjustments
(1) Set power meter calibrator ZERO/TEST switch to ZERO.
(2) Set TI RANGE switch to 1 mW.
(3) Set power meter calibrator POWER switch to 1 mW.
(4) Adjust power meter calibrator ZERO control for multimeter indication of 1 mV dc.
(5) Set power meter calibrator ZERO/TEST switch to TEST.
(6) Adjust A2R6 (fig. 1) for TI meter indication between 0.99 and 1.01 mW (0.995
and 1.005 mW for model 432B) (R).
(7) Adjust A2R74 (fig. 1) for multimeter indication between 0.999 and 1.001 V dc (R).
(8) Set RANGE switch to 10 mW.
(9) Set power meter calibrator POWER switch to 10 mW.
(10) Set power meter calibrator ZERO/TEST switch to ZERO and, if necessary,
adjust ZERO control for multimeter indication of 1 mV dc.
(11) Set power meter calibrator ZERO/TEST switch to TEST.
(12) If TI contains A2R86 (fig. 1), adjust potentiometer for multimeter indication
between 0.999 and 1.001 V dc and repeat (10) and (11) above. Return TI RANGE and power meter
CALIBRATOR switch to 1 mW. If necessary, readjust A2R6 (fig. 1) for TI meter indication
between 0.99 and 1.01 mW (0.995 and 1.005 mW for model 432B) (R).
(13) Repeat (1) through (12) above for optimum indications for RANGE switch
positions 1 mW and 10 mW.
NOTE
If indications in (1) through (13) above are within specified
limits, repeat 8 a above. If indications are not within specified
limits, continue with (14) below.
(14) If applicable, set OPERATE/CALIBRATE SWITCH A2S1 (fig. 1) to OPERATE.
6