TB 9-6625-2246-50
Table 2. Minimum Specifications of Equipment Required - Continued
Manufacturer and model
Common name
Minimum use specifications
(part number)
RESISTANCE STANDARD Range: 100 and 1000 M Ω
Beckman, Model CR1000M
(8579478)
NO. 2
Accuracy:4
Value: 10 Ω
STANDARD RESISTOR
L&N, Model 4025B (8616290)
NO. 1
Accuracy: 6.0 ppm2
Value: 100Ω
STANDARD RESISTOR
L&N, Model 4030B (8616291)
NO. 2
Accuracy: 5.25 ppm2
Value: 1 kΩ
STANDARD RESISTOR
L&N, Model 4035B (8616292)
NO. 3
Accuracy: 3.4 ppm2
Value: 10 kΩ
STANDARD
RESISTOR
L&N, Model 4040B (8616293)
No. 4
Accuracy:2
Value: 100 kΩ
STANDARD RESISTOR
L&N, Model 4045B (7907139)
NO. 5
Accuracy: 3.4 ppm
Value: 0.1 Ω
STANDARD RESISTOR
L&N, Model 4221B (8616294)
NO. 6
Accuracy:2
Value: 10 kΩ
STANDARD RESISTOR
General Radio, Model 1444A
(MIS-10400)
NO. 7
Accuracy: 2.5 ppm w/test report
'Combined accuracy of calibrator and dc voltage divider is 2.575 ppm when standardized with dc reference standard.
2Combined
accuracy of multimeter and standard resistor Nos. 1, 2, 3, 4, and 6 is 7.65 ppm.
3Combined
accuracy of resistance standard No. 1 standardized with resistance measuring system is 5.25 ppm at
1 MΩ and 16 ppm at 10 MΩ.
4Combined
accuracy of resistance standard No. 2 standardized with resistance measuring system is 0.013% at 100
MΩ and 0.127% total (100 MΩ steps) for 1000 MΩ value.
6. Preliminary Instructions
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 results of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Section IV contains the adjustments required to calibrate the TI. Adjustments to be
