HP 431B, Calibration Procedure

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TB 9-6625-086-35
8
(6) Position the controls of the power meter calibrator as follows:
(a) RANGE (MW) switch to .01.
(b) FUNCTION switch to CAL.
NOTE
After each change in position of TI RANGE switch, turn the
FUNCTION switch of power meter calibrator to the CURRENT
OFF position and adjust the TI zero controls for a zero
indication.
(7) Turn the TI and power meter calibrator RANGE switches to the settings listed
in table 4. If the indications are not within limits specified, perform
b
below.
Table 4. Range and Trucking Performance Check (with Power Meter Calibrator)
Test Instrument
Power Meter
Calibrator
Test Instrument Indications (mw)
(Readings for Model 431B
are in parenthesis)
Adjustments for Model
431C (fig. 3)
RANGE switch RANGE (MW) Min Max 200-Ohm 100-Ohm
settings switch settings Mount Mount
.01 .01 0.0098
(0.0097)
0.0102
(0.0103)
R14 R1
.03 .03 0.0295
(0.0291)
0.0305
(0.0309)
R13 R2
.1 .1 0.099
(0.097)
0.101
(0.103)
R12 R3
.3 .3 0.297
(0.291)
0.303
(0.309)
R11 R4
1 1 0.990
(0.970)
1.010
(1.030)
R10 R5
3 3 2.970
(2.910)
3.030
(3.090)
R9 R6
10 10 9.900
(9.700)
10.100
(10.300)
R8 R7
10
1
8 7.9
(7.7)
8.1
(8.3)
10 6 5.9
(5.7)
6.1
(6.3)
10 4 3.9
(3.7)
4.1
(4.3)
10 2 1.9
(1.7)
2.1
(2.3)