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Instruction 55-9002 27

Gas Pup

Pressure Sensor Check

The pressure sensor does not require calibration, but it is recommended

that the sensor be checked for accuracy on a periodic basis and to assure

that it is still operational.

To check the pressure sensor, the following equipment is recommended:

• Pressure source of at least 50 psig with an attached adjustable regula-

tor (compressed-air cylinder, company gas, or shop air)

• Pressure measuring device (calibrated gauge, or digital manometer)

• Pressure Hose Kit (P/N 55-0038)

• Assortment of hardware: Tubing, Clamps, and Fittings

Check the pressure sensor as follows:

1. Connect the above equipment as shown in Figure 21.

2. Turn Pup ON and select its high-pressure mode as described under

the previous heading Pressure Operating Mode.

3. Adjust regulator of pressure source for a pressure gauge reading of

50 psig. Observe that the pressure reading on the Pup should be

within ±5% of the reading on the gauge.

4. Shut off regulator and disassemble test equipment.

Figure 21. Pressure Testing the Sensor

PRESSURE

SOURCE

(Compressed Air

Cylinder,

Company Gas,

or Shop Air)

PRESSURE

FITTING

(Do not apply pressure

until “P” is displayed

in READING window)

HI%

LO%

PPM

RANGE

NATURAL GA S

READING

PRESSURE HOSE KIT

OPTION (P/N 55-0038)

CALIBRATED PRESSURE GAUGE

OR DIGITAL MANOMETER

ADJUSTABLE

REGULATOR

TEE

Use clamps or fitings on all tubing

connections to prevent the

tubing from blowing off when

under pressure.

NOTE:

Calibration

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