Pulsafeeder Pulsar DLCM - Manual (Page 42)

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TUNE FLOW 60.0%
0.1000 G
Using [UP] or [DOWN] enter the volume displaced for 1 minute of pump flow at the current motor
speed and stroke length. The percentage value displayed represents the net pump output (stroke and
motor speed). Press [ENTER]. The pump will now display the 5.775 GPH value at the 60.0% stroke
setting. Internally, the DLCM has retained the slope calculated at the last calibration and has off-set
the flow curve to satisfy the current reading requirement.
7.1.2 Analog Input Signal Calibration
The DLCM will accept analog input signals of 0-20mA, 4-20mA, 1-5mA, or 1-5 volts. The analog
input signal should be calibrated to the system. To perform a calibration, the signal generating device
(e.g., PLC) must be powered up, wired to the DLCM and capable of altering its output from minimum
to maximum signal.
You are calibrating the Analog Input Signal to the percentage of calibrated flow. The 0% and 100%
values displayed in this section refer to a percentage of Flow not Stroke Position.
The Stroke Position calibration reflects flow at 100% motor speed. The DLCM calibrates motor
speed directly. For example: In a high pressure application, the PULSAR begins discharging fluid at
10% stroke length. Thus it has 0% flow at 10% stroke. If you calibrate 0% = 4.0mA, and then input
a 4.0mA signal the DLCM will adjust the stroke length to 10%.
7.1.2.1 Analog Input #1 Calibration
The following is a minimal procedure for calibrating Analog Input #1. This will control the DLCM’s
Stroke Length (Calibrated) if the {2-Signal} option is configured. It will control Flow (Stroke Length
and Speed) if the {1-Signal} option is configured. For more information about the Analog Input signal,
refer to Section 7.2.15 Analog Mode.
1. Press [CAL]. The {CALIBRATE / PUMP FLOW} screen is displayed.
CALIBRATE
PUMP FLOW
2. Press [UP] to scroll to the {CALIBRATE / ANALOG IN}.
CALIBRATE
ANALOG IN
Press [ENTER] to go to the calibrate analog input sub-menu.
If Two Signal is selected the following is displayed:
CALIBRATE
STROKE POSITION
Press [ENTER]
to accept
3. The display shows the previous 0% and 100% flow analog signal calibration values:
0% = 4.0mA
100% = 19.8mA
If you would like to skip the calibration and change only the Signal Ratio, press both [UP] and
[DOWN] simultaneously. Skip to step 6. Pressing both [UP] and [DOWN] can also skip either the
min. or the max. calibration.
Press [ENTER] to continue with Analog Input Calibration..
4. The display prompts you to input the minimum analog signal value, 0% flow.
INPUT STROKE MIN
0% = XX.XmA