TB 9-6625-2168-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Aircraft Motor-Generator Test Set AN/GSM-65, Type L-1A and TS-2888.
TM 11-6625-680-15 was used as the prime data source in compiling these instructions. The
equipment being calibrated will be referred to as the TI (test instrument) throughout this
bulletin.
a. Model Variations. Variations among models are described in text.
b. Time and Technique. The time required for this calibration is approximately 3
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Dc volts
Range: 0 to 50 V
2% FS
Accuracy:
Ac volts
Range: 0 to 150 V
2% FS
Accuracy:
Range: 0 to 200 A1
Dc amps
2% FS
Accuracy:
Ac amps
Range: 0 to 50 A
2% FS
Accuracy:
Range: 390 to 410 Hz
1 Hz at 400 Hz,
Accuracy:
2 Hz at 390 and 410 Hz
1Verified
to 25 A.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets 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
