Pulsafeeder Pulsar DLCM - Manual (Page 38)

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7. General Operation
This section covers the General Operation of the DLCM as it relates to software. It includes detailed
instructions and example screens. The default values of the DLCM have been set at the factory. You can
over-ride these settings to tune the DLCM to your particular needs.
7.1 General Operation Instructions
7.1.1 Pump Flow Calibration
Pulsafeeder recommends performing at minimum a Two-Point flow calibration on every PULSAR
DLCM installed. Maintenance re-calibration should be performed periodically – at least every three to
four months – to account for component wear. Re-calibration of the pump is also recommended
whenever wet-end components are replaced.
The DLCM does not automatically compensate for changing system conditions (e.g., discharge
pressure, fluid viscosity, etc.). You should re-calibrate whenever the application conditions change.
All flow calibrations are performed at 100% motor speed. The calibration process affects the Stroke
Adjustment mechanism only. The DLCM self-calibrates its motor speed.
™
Multi-point Calibration Procedure
1. Press [CAL] to enter the Calibration Menu. Press [ENTER] to go to the calibrate pump flow sub-
menu:
CALIBRATE
PUMP FLOW
Press
[ENTER]
2. The DLCM displays the last time the pump was calibrated. Press [ENTER] to continue with pump
flow calibration.
LAST FLOW CAL
3:25 1/22/01
Press
[ENTER]
3. The display shows {FLOW CALIBRATION / 1 POINT}. The '1 POINT' text will be flashing.
FLOW CALIBRATION
1 POINT
Press
[UP]
Press [UP] to change flow calibration to 2 points, 3 points, 4 points or 5 points. The calibration points
correspond to the following stroke length values:
1 point: 100% 4 points: 10, 25, 50 and 100%
2 points: 10 and 100 % 5 points: 10, 25, 50, 75 and 100%
3 points: 10, 50 and 100%
A One – point calibration should be avoided in applications where the displayed flow rate is critical.
For discharge pressures less than 500 psi (34.5 Bar), a minimum 2 – point calibration is
recommended. For discharge pressures above 500psi (34.5 Bar) a minimum 3 – point calibration is
recommended.
These percentage values correspond to the API standards. If you continue to press [UP] you will also
see the following options: {CHANGE CONSTANTS} and {TUNE}. These options are for use after a
multi-point calibration has been performed. For a standard multi-point calibration, set the number of
calibration points to use and press [ENTER] to continue.