TB 9-6625-155-24
current calibration. The equipment must meet or exceed the minimum use specifications
standard and TI. Where the four-to-one ratio cannot be met, the actual accuracy of the
equipment selected is shown in parentheses.
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
Minimum use
Manufacturer and model
Common name
specifications
(part number)
CALIBRATOR
Range: 0 to 615 V ac @60 Hz
Fluke, Model 5720A (5720A) (p/o
Accuracy:
0.4%
MIS-35947); w/ amplifier, Fluke
5725A/AR (5725A/AR)
RESISTANCE STANDARD NO. 1 Range: 1 kΩ
IET Labs, HARS-LX-9-0.001
Accuracy:
0.3%
(HARS-LX-9-0.001)
RESISTANCE STANDARD NO. 2 Range: 2 and 4 MΩ
IET Labs, HRRS-Q-4-1M-10KV-RM
Accuracy:
0.3%
(HRRS-Q-4-1M-10KV-RM)
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 and item identification number 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 these TI's.
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
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUTS to minimum after each step within the performance
check where applicable.
a. For TI models MJ459 and MJ559 only, press TI battery condition test switch
(marked with the battery symbol) and verify the meter indicates within the portion of the
scale marked with the battery symbol before proceeding with Calibration Process.
b. For TI models MJ159, MJ359, MJ459 and MJ559 only, without the test leads
connected to the TI and rotary selector switch set to 1 kV range, press and hold the TEST
