CALIBRATION - LOW PRESSURE GAGE

TM 55-4920-442-13&P

3-95. Instruments-Calibration (CRC)

3-95

CALIBRATION - HIGH PRESSURE GAGE (Cont.)

Method II

1. Isolate the gage from the hydraulic system by closing the HP GAGE SHUT-OFF valve.

2. Connect a 0-6000 psi test gage and hydraulic pressurizing equipment to the HP GAGE TEST port.

3. Operate the pressurizing equipment and compare the two gage readings over various points on the scale.

4. The test stand gage must be replaced if the readings do not conform to the limitations stated in step 4 of Method I

above.

CALIBRATION - LOW PRESSURE GAGE

1. Place selector valve in LP GAGE CALIBRATION position.

2. Connect a 0-300 psi test gage and hydraulic pressurizing equipment to the LP GAGE TEST port.

3. Operate the pressurizing equipment and compare the two gage readings at various points on the scale.

4. The test stand gage must be replaced if its readings do not agree with the standard gage within one percent 1/2

percent of full scale.

CALIBRATION - FILL PRESSURE GAGE

1. Remove gage from the test stand as outlined in para. 3-86.

2. Connect to pressuring equipment along with a standard 0-300 psi gage and compare the two readings.

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