SECTION I IDENTIFICATION AND DESCRIPTION

TB 9-4920-451-35

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IV.

CALIBRATION PROCESS FOR GULL

AIRBORNE INSTRUMENTS,

MODEL GTF-4

Preliminary instructions......................................

Equipment setup ..................................................

Capacitance...........................................................

Resistance .............................................................

Final procedure.....................................................

CALIBRATION PROCESS FOR

CONSOLIDATED AIRBORNE SYSTEMS,

MODELS TF20-1 AND TF579

Preliminary instructions......................................

Equipment setup ..................................................

Capacitance...........................................................

Resistance .............................................................

Final procedure.....................................................

IDENTIFICATION AND DESCRIPTION

1. Test Instrument Identification.

This bulletin provides instructions for the

calibration of Fuel Quantity Gage Test Set, Simmons Precision, Inc., Model 472090-002;

Gull Airborne Instruments, Model GTF-4; and Consolidated Airborne Systems, Models

TF20-1 and TF579. The manufacturers' manuals were used as the prime data sources 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 4

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.