TB 9-6625-2246-40
Table 1. Calibration Description - Continued
Test instrument
parameters
Performance specifications
Range: 0.1 A to 1 A (in 5 ranges)
Ac current5
(% of reading + % of range)6
Accuracy:
Frequencies
Range
100 A
1 mA to 100 mA
1A
10
to 20 Hz
0.4
+ 0.02
0.4
+ 0.02
0.4
+ 0.02
20
to 45 Hz
0.15
+ 0.02
0.15
+ 0.02
0.16
+ 0.02
45
to 100 Hz
0.06
+ 0.02
0.06
+ 0.02
0.08
+ 0.02
0.1 to
1 kHz
0.06
+ 0.02
0.03
+ 0.02
0.1
+ 0.02
1
to
5 kHz
---
0.03
+ 0.02
0.1
+ 0.02
Add 10 ppm x (Vin/1000)2 of reading additional error for inputs >100 V.
1
Four-wire ohms; for two-wire ohms accuracy add 250 m offset.
2
3Manufacturer does not provide official specifications for 100 nA, 1 A and 10 A ranges.
4Calibrated in analog mode only.
5Performance verified in DCI and ACV checks.
6Add 0.001025% of reading error.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Standards Set,
NSN 4931-00-621-7878. Alternate items may be used by the calibrating activity. The items
selected must be verified to perform satisfactorily prior to use and must bear evidence of
current calibration. The equipment must meet or exceed the minimum use specifications
listed in table 2.
5. Accessories Required. The accessories required for this calibration are common
calibration procedure. The following peculiar accessory is also required for this calibration:
Sensitivity Box, Galvanometer Key, 7913207.
