TB 9-6625-1493-24
5. Accessories Required. The accessories required for this calibration are common
usage accessories issued as indicated in paragraph 4 above and are not listed in this
calibration procedure.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
AC MEASUREMENT
Range: 2.0 mV to 1000 V ac
Fluke, Model 5790A
STANDARD
Accuracy: 0.0139 %
(13534003)
CALIBRATOR
Dc Voltage:
Fluke, Model 5720A (5720A) (p/o
Range: 100 mV to 1000 V
MIS-35947); w/amplifier Fluke,
Accuracy: 12.5 ppm1,2
Model 5725A/AR (5725A/AR)
Ac voltage3,4
Range: 100 mV to 1000 V
Accuracy
400 Hz & 4.0 kHz
0.025 %
9.0 kHz
0.037 %
15 kHz & 20 kHz
0.075 %
40 kHz
0.125 %
100 kHz
0.250 %
Fluke, Model 732A (732A)
DC REFERENCE
Range: 10 V
Accuracy: Test report4
STANDARD
ESI, Model RV726 (MIS-10295)
DC VOLTAGE DIVIDER
Range: 10:1
Accuracy:1
(Reference); ESI, Model RV
722 (RV722) (Transfer)
Agilent, Model 3458A (3458A)
MULTIMETER
Range: 100 mV to 1000 V dc
Accuracy:4
POWER SUPPLY
Range: 8.0 to 10 kV
Fluke, Model 410B/AT
Accuracy: 0.75%
(MIS-10230)
ESI, Model DT72A (7915908)
RATIO TRANSFORMER
Range: 0 to 1.000000
Accuracy: Test report3
A
General Radio, Model 1444A
STANDARD RESISTOR
Range: 10 k
ccuracy: Test report4
(MIS-10400)
Combined accuracy of calibrator (10 V dc) and dc voltage divider is 7.275 ppm.
1
2Combined accuracy of calibrator (1000 V dc) and multimeter (100 mV and 1.0 V dc) is 25 ppm.
3Combined accuracy of calibrator (1 V, 400 Hz) and ratio transformer for following outputs is: 1 mV, 0.625%; 10 mV,
0.075%; and 100 mV, 0.0195%.
4Utilize; manufacturer's 24-hour specifications for dc voltage (1 through 1000 V); dc reference standard and standard
resistor are used only to characterize multimeter.
CALIBRATION PROCESS FOR DIFFERENTIAL VOLTMETER
FLUKE, MODELS 887A, 887AB, AND 887AB/AN
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.