TB 9-6625-2190-24
prior to use and must bear evidence of current calibration. The equipment must meet or
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 4 above, and are not listed in this calibration
procedure.
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
CALIBRATOR
Dc voltage:
Fluke, Model 5720A (5700A/EP)
Range: 300 mV to 1000 V
(p/o MIS-35947); w/amplifier,
Accuracy: 0.025%
Fluke, Model 5725A/AR
(5725A/AR)
Dc current:
Range: 300 A to 5 A
Accuracy: 0.2%
Ac voltage:
Range: 300 mV to 1000 V
Frequency: 20 Hz to 5 kHz
Accuracy: 0.125%
Range:
Accuracy:
190 Ω
0.01%
190 kΩ to 1.9 MΩ
0.077%
19 MΩ
0.262%
CALIBRATION PROCESS FOR
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 TM 11-6625-3199-14 for the TI (no calibration
adjustments can be made on the High Voltage probe).
d. Unless otherwise specified, all controls and control settings refer to the TI.