TB 9-6625-2243-24
provide a four-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.
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
Minimum use specifications1
Common name
(part number)
CALIBRATOR
Dc voltage: Range: 300 mV to 900 V
Fluke, Model 5720A (5720A)
Accuracy: 0.83%
(p/o MIS-35947); w amplifier,
Fluke 5725A/AR (5725A/AR)
Ac voltage: Range: 3 to 900 V
Frequency: 45 to 1000 Hz
Accuracy: 0.52%
Resistance: Range: 100 to 10 M
Accuracy: 0.15%
Dc current: Range: 30 mA to 5 A
Accuracy: 0.39%
1
The ranges and accuracies listed reflect the highest range required and the best accuracy required, respectively, in this
technical bulletin.
CALIBRATION PROCESS
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. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
HIGH VOLTAGE is used or exposed during the performance of
DEATH ON CONTACT may result if
this calibration.
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
and COM.
a. Connect calibrator OUTPUT HI and LO to TI V