TB 9-4920-451-24
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Simmons Precision, Inc., Model 472090-002
Capacitance measurement
Range: 40 to 999.9 pF
(external)
Accuracy: 0.5% of reading
Range: 1000 to 2000 pF
Accuracy: 0.5% of reading
Capacitance substitution
Range: 40 to 999.9 pF
(internal)
Accuracy: +0.5% of reading
Range: 1000 to 2000 pF
Accuracy: 0.5% of reading
Range: 1.0 to 1000 M
Accuracy: +l increment
-0.4 increment
Gull Airborne Instruments, Model GTF-4
Range: 0 to 8000 pF in 4 ranges1
Capacitance
Accuracy: 0.5% of range setting
Range: 0 to 100,000 M in 4 ranges
Accuracy: 1.0 to 1000 M +0.5% of reading
1000 to 10,000 M +10% of reading
10,000 to 100,000 M +15% of reading
0.1 to 1.0 M +1.0% of range
Consolidated Airborne Systems, Models TF20-1 and TF579
Capacitance
Range: 0 to 5000 pF
Accuracy: +0.5% of FS
Range: 0 to 10,000 M
Accuracy: 10% of reading
1Verified
from 35 to 2000 pF only.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287 or AN/GSM-705. 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
to-one ratio between the standard and TI. Where the four-to-one ratio cannot be met, the
four-to-one 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.
