TB 9-6625-1942-24
Table 1. Calibration Description - Continued
Test instrument
parameters
Performance specifications
Ratio (option 080)
Accuracy :
(A% of reading + B% of input range) + Ext ref range X C% of input range
dc/dc measurement
Ext ref voltage
Ext Ref
Input range
Range
0.1V
1V, 10V
100V, 1000V
A
B
C
A
B
C
A
B
C
10 V
0.007% 0.005% 0.002% 0.002%
0.003%
0.002% 0.007%
0.003%
0.002%
1V
0.008% 0.015% 0.003% 0.003%
0.012%
0.003% 0.008%
0.012%
0.003%
ac/dc measurement
Accuracy : 10 V ext ref range: same as ac voltage accuracy
1 V ext ref range : Add 0.01 to % of range ac voltage accuracy
Ohms
Range : 0 to 10,000 k in 6 ranges
Accuracy :
(% of reading + % of range)
k range: (0.015 + 0.005)
1, 10, 100 k ranges: (0.015 + 0.002)
1000 k range: (0.02 + 0.002)
10,000 k range: (0.04 + 0.002)
1Not
calibrated above 1000 V dc.
2K25-3490A
probe derated from 0.25%.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM 286; AN/GSM-287; or AN/GSM-705. Alternate items may be used
by the calibrating activity. The item selected must be verified to perform satisfactorily
prior to use and must bear evidence of current calibration. The equipment must meet or
provide a four-to-one ratio between the standard and TI. Where the four-to-one ratio cannot
be met, the four-to-one accuracy will be listed, and the actual accuracy of the equipment
selected is shown in parenthesis.
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:
DC power supply, Elgar, model DCS40-30EM10.
