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Installation and Configuration Manual 57
General Maintenance
General MaintenanceCalibration Check
• Modbus Register 137: contains the Time period count, which is the maximum number of
measurements to be rejected before resuming normal operation; the preset value is 2. If the
value is set to 0, TPT is disabled, and the output will always follow the time period
measurement. If you want to program another value, it should be determined experimentally,
and be equal to the length of the longest undesirable transients which are likely to arise. If the
value is set too high, the meter will be slow to respond to genuine changes in the fluid
properties.