TB 9-6625-975-35
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Meter range
Range: 0 to infinity
Voltage
Range: 0 to 500 V dc
Accuracy: 5%
Range: 0 to 540 V dc1
Accuracy: 3%
Range: 0 to 1000 V dc2
Accuracy: 0.045 in. scale
Range: 0 to 1000 MΩ
Accuracy: 1% of any cardinal calibration point
Range: 0 to 500 MΩ at 6 V1
Accuracy: 0.03 in. of scale ( 10% at 15% and 85% of FS)3
Range: 0 to 1000 MΩ in 5 ranges2
Accuracy: 0.045 in. of scale
1Accuracy
is for Biddle, Model 210359.
2Accuracy
is for ZM-73U (AUL, Model 1602).
35% at mid scale.
SECTION II
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2
identifies the
specific equipment to be
used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286. Alternate items may be used by the calibrating activity when
the equipment listed in table 2 is not available. 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. The
accuracies listed in table 2 provide a four-to-one ratio between the standard and TI.
5. Accessories Required. The
accessories listed in
table 3 are issued as
indicated in
paragraph 4 above and
are used in this
calibration procedure. When necessary, these items
may be substituted by equivalent items, unless specifically prohibited.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Item
Common name
Minimum use specifications
(part number)
A1
DIGITAL
Range: 450 to 1025 V dc
Hewlett-Packard, Model
3490AOPT060 w/K25-3490A
Accuracy: 0.25%
(3490AOPT060) w/K25-3490A)
Biddle-Gray, Model 601147-1
A2
Range: 100Ω to 1.111 MΩ
STANDARD
(7910328)
Accuracy: 0.10%
ICC, Model CR10M (8598965)
A3
Range: 1 to 10 MΩ
STANDARD
Accuracy: 0.25%
A4
ICC, Model CR100M (8598966)
Range: 10 to 100 MΩ
STANDARD
Accuracy: 0.25%
A5
ICC, Model CR1000M (8579478)
Range: 100 to 1000 MΩ
STANDARD
Accuracy: 0.25%
3