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8. Calibrations
Y
OUR
MPC
VECTOR
IS NOT FACTORY CALIBRATED AS THE CALIBRATIONS ARE SYSTEM DEPENDENT AND
FLOW METER DEPENDENT
.
Y
OU MUST ALWAYS PERFORM A CALIBRATION WITH THE
MPC
VECTOR
INSTALLED IN YOUR SYSTEM PRIOR TO USE
.
F
AILURE TO PROPERLY CALIBRATE THE UNIT MAY RESULT IN
DAMAGE TO SYSTEM COMPONENTS
.
As a convention in this manual:
“WET” calibration procedures
will refer to those that require normal operating conditions, for example:
the pump running with fluid
an electrical signal input (i.e. 4-20mA calibrator) provided at the appropriate terminals.
“DRY” calibration
procedures are run under non-operational conditions, and often do not require the pump
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.
Speed
(RPM)
Volume
Delivered
(GAL)
Time
Elapsed
(seconds)
Calculated
Flow Rate
Point 1
1800
0.416
60 sec
25 GPH
Point 2
180
0.0416
60 sec
2.5 GPH
Your Point 1
Your Point 2
For GPH (Gallons Per Hour)
:
3600
/
Содержание Pulsafeeder MPC Vector
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