TB 9-6625-1213-24
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
AUTOTRANSFORMER
Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
AUDIO ANALYZER
Range: 50 mV to 1 V ac
Boonton, Model 1121
Frequency: 10 Hz to 100 kHz
(1121)
Distortion: < 1%
FUNCTION/ARBITRARY
Range: 20 Hz to 2 MHz
Agilent, Model 33250A
Flatness: 0.25%
(33250A)
Agilent, Model 3458A
Range: 8 mV to 10.15 V ac
(3458A)
100 Hz to 50 kHz
Accuracy: 0.25% ac
Range: 6.24 to 46 V dc
Accuracy: 0.1% dc
Fluke, Model 8922A/AA
TRUE RMS VOLTMETER
Range: 10 mV to 10 V at 20 Hz
(8922A/AA)
to 1 MHz
Accuracy: 1.5%
Range: 10 V at 1.2 to 2 MHz
Accuracy: 3%
CALIBRATION PROCESS FOR AC AMPLIFIER AM-1881/U
(HEWLETT-PACKARD MODEL 450A)
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure.
d. Unless otherwise specified, all control and control settings refer to the TI.
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUPUT(S) to minimum after each step within the performance
check where applicable.