TB 9-6625-1924-24
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 four-to-one ratio 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
Common name
Minimum use specifications
(part number)
CALIBRATOR
AC Voltage:
Fluke, Model 5720A (5720A) (p/o
Range: 9.8 mV to 306 V
MIS-35947); w amplifier, Fluke
Accuracy: 0.5 %
5725A/AR (5725A/AR)
DC Voltage:
Range: 0.098 to 1020 V
Accuracy: 0.5 %
Range: 9.5 ohms to 10.5 megohms
Accuracy: l.25%
Range: 0.01 to 3 V
Agilent, Model 3458A (3458A)
Accuracy: 0.5 %
FUNCTION GENERATOR
Range: 10 Hz to 1 MHz
Agilent, Model 33250A (33250A)
Flatness: 0.5 %
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 text 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.