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Operation Press to turn on FlowMax 221. Important: Without activity, FlowMax 221 will power down automatically after approximately one minute. After power down, press to restart the FlowMax 221 (flow pulse will not restart the display). Meter Cal METER CAL is entered at the factory. Changing the CAL number is required only after field replacement of display assembly and/or flowmeter.
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“US” to “SI”. Press to program either “US” or “SI” setting. Calculating “METER CAL” The Flow Meter calibration number is stamped on the tag attached to each FlowMax 221. Write this number down so it is available if future programming is required.
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(EQ 2) Battery Replacement FlowMax 221 is operated with two 1.5 volt lithium AA batteries. The batteries do not need to be within normal voltage specifications or installed to retain current totals. “LoBAT” will flash on the display indicating limited remaining battery life.