TB 9-6625-2246-50
Table 1. Calibration Description - Continued
Test instrument
parameters
Performance specifications
Range: .1 A to 1 A (in 5 ranges)
Ac current5
Accuracy:
(% of reading + % of range)6
Frequencies
Range
100 A
1 mA to 100 mA
1A
10
to 20 Hz
.4
+
.02
.4
+
.02
.4
+
.02
20
to 45 Hz
.15
+
.02
.15
+
.02
.16
+
.02
45
to 100 Hz
.06
+
.02
.06
+
.02
.08
+
.02
.1 to 1 kHz
.06
+
.02
.03
+
.02
.1
+
.02
1
to 5 kHz
---
.03
+
.02
.1
+
.02
1Add
10 ppm x (Vin/1000)2 of reading additional error for inputs >100 V.
2Four-wire ohms; for two-wire ohms accuracy add 250 mΩ offset.
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 .001025% of reading error.
EQUIPMENT REQUIREMENTS
4. Equipment Required
. Table 2 identifies the
specific equipment to be
used in this
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
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. The following peculiar accessory is also required for this
calibration: Sensitivity Box, Galvanometer Key, 7913207.