TB 9-6625-170-24
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 parentheses.
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.
Manufacturer and model
Common name
Minimum use specifications
part number)
Fluke, Model 5720A (5720A) (p/o
CALIBRATOR
Dc voltage:
MIS-35947); w/ amplifier, Fluke
Range: 0 to 10 V
Accuracy: 0.05%
5725A/AR (5725A/AR)
FUNCTION
Range: 1 Hz to 5 kHz
Agilent, Model 33250A (33250A)
Accuracy: 1.25%
Dc voltage:
Hewlett Packard, Model 3458A
Range: 1 mV to 100 V
(3458A)
Accuracy: 0.05%
Ac voltage:
Range: 0 Ω to 4000 Ω
Accuracy: 0.05%
Table 3. Accessories Required.
Common name
Description (part Number)
Capacitor
100 pF
Capacitor
0.1 F
50 Ω
Resistor
70 Ω
Resistor
100 Ω
1
Resistor
500 Ω
Resistor 2
1 kΩ, watt
Resistor
5.1 kΩ
Resistor
15 kΩ
Resistor
Switches 3
Single pole double-throw
Two required.
1
Two required.
2
3 Three Required. Wiring connections can be used instead switches.
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.