TB 9-6625-2354-35
use and must bear evidence of current calibration. The equipment must meet or exceed the
to-one ratio between the standard and TI. Where the four-to-one ratio cannot be met, the
actual accuracy of the equipment selected is shown in parenthesis.
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure.
Manufacturer and model
Minimum use specifications1
Common name
(part number)
CALIBRATOR
Dc voltage:
Range: 0 to 1000 V
Fluke, Model 5720A (5700A/EP) (p/o
Accuracy: .4375%
MIS-35947), w/amplifier, Fluke,
5725A/AR (5725A/AR)
Dc current:
Range: 50 A to 10 A
Accuracy: .25%
Ac voltage
Range: 0 to 1000V
Frequency: 60 Hz to 100 Hz
Accuracy: .75%
Biddle-Gray, Model 71-631
Range: 0 to 1.1 MΩ
STANDARD NO. 1
(7910328)
0.047%
Accuracy:
Beckman, Model CR10M
Range: 1 to 10 MΩ
STANDARD NO. 2
(8598965)
0.047%
Accuracy:
Beckman, Model CR100M
Range: 10 to 20 MΩ
STANDARD NO. 3
(8598966)
0.047%
Accuracy:
1The
ranges and accuracies listed reflect the highest range required and the best accuracy required, respectively, in this
technical bulletin.
6. Preliminary Instructions
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. Additional
maintenance information is contained in the manufacturers' manuals and/or technical
manuals for the TI.
variety of multimeters.
