4.4.3Electrical Zero Check
Turn the power supply “ON” and allow the flowmeter 30 minutes to warm up. Stop all flow through the transducer and check the electrical zero.
CAUTION: DO NOT ASSUME THAT ALL METERING VALVES WILL COMPLETELY SHUT OFF FLOW. EVEN A SLIGHT LEAKAGE THROUGH A VALVE WILL CAUSE AN INDICATION ON THE METER WHICH WILL FALSELY APPEAR TO BE A ZERO SHIFT.
If necessary, adjust the “ZERO” potentiometer located on the front panel of the power supply, until the meter indicates zero.
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