TB 9-6625-111-24
Table 1. Calibration Description Continued.
Test instrument parameters
Performance specifications
Range:
1 Hz to 20 kHz
Accuracy: (0.01% of rdg + 2 digits)
Minimum Sensitivity (RMS sine wave)
Range
1 Hz to 5 Hz
5 Hz to 20 kHz
4.00 V
0.7 V
0.3 V
40 V
7V
3V
300 V
70 V
30 V
Dwell Angle
Range:
0 to 120 degrees
Accuracy: 2 degrees
Duty Cycle
Range:
0.0 to 99.9% (1 Hz to 20 kHz, pulse width > 5 S)
Accuracy: (0.2% per kHz + 0.1%) (for Risetime < 1S)
RPM
RPM1 Range: 70 to 7,000 RPM
RPM2 Range: 120 to 7,000 RPM
Accuracy: (0.2% + 2 digits)
Temperature
Range:
-40 to 999 C @ >20 C ambient
-40 to 980 C @ <20 C ambient
Accuracy: includes TI and Probe:
(0.3% of rdg + 6 C) @ -40 to -20 C
(0.3% of rdg + 4 C) @ -20 to 0 C
(0.3% of rdg + 3 C) @ 0 to 170 C
(0.3% of rdg + 5 C) @ 170 to 260 C
(0.3% of rdg + 6 C) @ 260 to 700 C
(0.3% of rdg + 7 C) @ 700 to 999 C
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; AN/GSM-287; or AN/GSM-440. 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. The accuracies listed in table 2
provide a four-to-one ratio between the standard and TI. Where the four-to-one ratio
cannot be met, the actual accuracy of the equipment selected is shown in parentheses.
5. Accessories Required. The accessories required for this calibration are common
usage accessories issued as indicated in 4 above, and are not listed in this calibration
procedure. The following peculiar accessory is also required for this calibration: A
characterized length of type K thermocouple wire using the technique in USATA 991.