Fluke MOLBOX RFM Operation And Maintenance Manual page 104

molbox™ RFM™ OPERATION AND MAINTENANCE MANUAL
In Auto mode, when the valves are in BPR OFF state, flow is calculated from the average of
the two RPT pressure readings as in BPR OFF mode. When the molbox RFM valves switch
to the BPR ON valve state in Auto mode, the tare can no longer be dynamically calculated
because the two RPTs are not measuring the same pressure. The most recent tare that was
automatically calculated during the BPR OFF valve state is used to correct the pressures
used and displayed in Auto mode until the valves return to the BPR OFF state again. This assures
that flow measurements remain as consistent as possible during Auto mode valve switching
and that the tare value that is most likely to be correct is used at all times.
It is possible to change the BPR mode by remote communication with molbox RFM and
also to disable molbox RFM valve control and switching while in any BPR mode (see
Section 4.3.4.2).
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