Pump Totalizer Application
This type of application is an extension of the pump control application, accessed by
setting P-2 = 4. Unlike a pump application, in which the mode of the measurement
(P-2) can be of material or space, the pumped volume totalizer mode is a measurement
of the liquid volume pumped with reference to the material level.
The material level must be converted to volume using volume conversion parameters
P-34, 35 and 36 and/or convert display P-37. The HydroRanger I in pump-down, will
record the volume being pumped out. Alternately, the HydroRanger I will record the
volume pumped in if the pump setpoints are set for pump-up.
When the pump(s) is OFF, the HydroRanger I estimates the volume of the inflow or
discharge by recording the rate at which the liquid level changes. When the pump(s) is
operating, the estimated inflow or discharge volume may be added (P-33 = 1) to the
pumped volume to obtain the net volume pumped during the pump cycle or omitted
(P-33 = 2) from the pumped volume total, such as in batch processing.
When the pump(s) stops, the pumped volume of the previous pump cycle is added to
the total volume pumped in the 8 digit totalizer.
The totalizer contents are stored in RAM and will be lost in the event of a power failure.
However, after every 1 hour of continuous operation, the totalizer contents are stored in
the EEPROM. Thus, after a power failure, the totalizer will be loaded with the last value
stored.
In the event of a loss of echo, the totalizer will continue being incremented by the
flowrate established from the last valid echo. If the fail-safe timer expires (’LOE’ is
displayed) or when in the calibrate mode, the totalizer will stop being incremented and
hold its last updated value. Once the totalizer has been filled (99999999), it will
automatically reset itself to zero and resume totaling.
The HydroRanger I can be calibrated (P-39) to normally display one of the following
readings:
•
enter option “0”, hold last reading selected in run mode
•
enter option “1”, high total: 4 highest digits of the 8 digit totalizer
•
enter option “2”, low total: 4 lowest digits of the 8 digit totalizer
•
enter option “5”, level
It must be noted that only half of the totalizer digits can be accessed or viewed at
one time.
e.g. high total low total
P-54 P-55
8 digit total 1 3 2 5 4 7 6 9
PL-399 6 – 13
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