Manual

USING THE MODEL 320 PRESSURE
CALIBRATOR AND LPS WITH A HAND PUMP
1. Safely take the instrument to be tested out of
service, equilize it, and vent it.
2. Vent the low side to atmosphere and connect the
high side as shown, being very careful that there are
no leaks. Note: It is best to drain the high and low
sides to prevent liquids from entering the calibration
tubing.
3. Connect the special connector to the Model 320 mA
input.
4. Connect the test leads to the LPS at the loop power
connection and to the instrument to be calibrated,
being careful to observe the correct polarity.
5. Turn on the Model 320 and select mA.
6. Select the desired engineering units by pressing the
Eng Unit key.
7. Press the Zero key to zero the Model 320.
Checking zero several times in the first 4 minutes of
operation is recommended.
8. Proceed with calibration.
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