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8. Calibrations
Y
MPC VECTOR
OUR
FLOW METER DEPENDENT
INSTALLED IN YOUR SYSTEM PRIOR TO USE
DAMAGE TO SYSTEM COMPONENTS
As a convention in this manual:
"WET" calibration procedures
the pump running with fluid
an electrical signal input (i.e. 4-20mA calibrator) provided at the appropriate terminals.
"DRY" calibration
to run or that a specific input signal be present.
Some of the calibration routines may be performed either way. Note any system requirements listed for each
routine.
8.1 Pump Flow Calibration
The MPC Vector uses a two point pump flow calibration method. This calibration method is used for both open
(speed based) and closed loop flow control (flow meter based) systems. For details on theory of operation, refer to
Section 1.2.5 Control Modes. Refer to Section 16 Menu Maps for key press sequences.
8.1.1
Open Loop Pump Flow Calibration
Open loop speed based flow calibration will need two flow rate points and require two drawdown intervals
(wet cal only), one at a high speed (max speed recommended) and another at low speed (full turndown
recommended). These pump RPM points can be adjusted for flow within your pumps flow rate. In order to
use the full speed range (default 10:1 turndown) use the maximum allowable speed range based upon motor
turndown.
Note: The following calibration example shows an example pump with measured flow rates of 25 GPH at
1800 RPM and 2.5 GPH at 180 RPM (maximum turndown utilized). These will be the two calibration
points used by the system, once calibration is complete.
Below is a flow Calibration Table to aid as an example in recording your two point pump flow information.
Point 1
Point 2
Your Point 1
Your Point 2
For GPH (Gallons Per Hour):
IS NOT FACTORY CALIBRATED AS THE CALIBRATIONS ARE SYSTEM DEPENDENT AND
. Y
OU MUST ALWAYS PERFORM A CALIBRATION WITH THE
. F
AILURE TO PROPERLY CALIBRATE THE UNIT MAY RESULT IN
.
will refer to those that require normal operating conditions, for example:
procedures are run under non-operational conditions, and often do not require the pump
Speed
Volume
(RPM)
Delivered
(GAL)
1800
0.416
180
0.0416
Time
Elapsed
(seconds)
60 sec
60 sec
38
MPC VECTOR
Calculated
Flow Rate
25 GPH
2.5 GPH
3600
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