Idex Pulsafeeder MPC Vector Installation, Operation & Maintenance Manual page 45

For GPM (Gallons Per Minute):
Shown below is the two point calibration curve for the example data presented in the above table. These
values represent the speed-to-flow characterization of your pump. The two speed values, 180 RPM (10%)
and 1800 RPM (100%), will correspond to 2.5 and 25 GPH, respectively for this pump. The speed values
can be used for set point input calibration, see Section 8.1.3 Set point Calibration and Range Setup .
The default drawdown interval is 60 seconds although the user may terminate for shorter intervals. You
will be requested to enter your calculated flow rate at the end of each drawdown period.
8.1.1.1 Open Loop Dry Flow Calibration
The open loop Dry Flow Calibration routine does not require the pump to run. Instead, the user must input 2 known
flow rate versus speed points. These points may come from previous calibrations or from a pump data sheet. The
user will be prompted for these values. This process can be used for fine adjustment of flow rate display, or in
situations where it is not possible or not safe to run the pump during calibration.
Note: A good default entry for pump dry flow is pump maximum rated flow at 1800 RPM and one-tenth of
pump maximum flow at maximum speed turn down of 180 RPM.
Proceed with the following steps from the handheld remote:
1. Press the MENU key to access the Calibration Menu.
2. Press the ENTER key to access Pump Flow Calibration screen.
3. Press the ENTER key to access Dry Pump Flow Calibration screen.
Figure 8-1 Open Loop Speed-to-Flow Calibration Flow Curve
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