TB 9-4920-362-35
SECTION I
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for
the
1. Test Instrument Identification.
calibration of Test Box Assy Pilot Assist/Nulling, Sirkorsky, Model 70700-20678-041.
TM
55-4920-414-13&P 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. None.
b. Time and Technique. The time required for this calibration is approximately 2
hours, using the dc and low frequency technique.
2. DA Form 2416 (Calibration Data Card)
prescribed by TB 750-25-1. DA Form 2416 must be annotated in accordance with TB 750-
25-1 for each calibration performed.
b. Adjustments to be reported on DA Form 2416 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
Power requirements
115 V ac, 60 Hz 10%;
28 V dc 1%
Dc volts
Range: -15.5 To +28.5 V
Accuracy: 1.8%
Dc current
Range: -10.5 To +10.5 mA
Accuracy: 5%
SECTION II
EQUIPMENT REQUIREMENTS
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.
2
