Pulsafeeder Pulsar DLCM - Manual (Page 46)

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7.1.4 Analog Output Signal Calibration
Depending upon the option selected, {STROKE & SPEED} or {STROKE POSITION} or {MOTOR
SPEED}, the DLCM will generate an analog output signal proportional to the selection. The signal can
be calibrated to a standard range of 0-20mA, 4-20mA, 1-5mA, or 1-5 volts. It should be calibrated to
the attached system.
For more information on configuring the Analog Output Signal refer to Section 7.2.5 – Analog Output
Set up.
The value that the DLCM displays is not precisely calibrated to its output. The value that is
displayed (e.g., 4.0mA) is for reference only. In many cases, the displayed value will not exactly
match the value read by the attached equipment.
The Analog Output reflects the calibrated output (e.g., Flow) not the Mechanical output (e.g., Stroke
position).
If the pump motor is off, the output will represent the minimum value (0%) regardless of the option
selected (e.g., {Stroke Position}).
1. Press [CAL] to enter the {CALIBRATE} sub-menu. Press [UP] twice to scroll to the {ANALOG
OUTPUT} selection:
CALIBRATE
ANALOG OUTPUT
2. Press [ENTER]. The screen that allows you to set the output at 0% is displayed.
OUTPUT AT 0%
4.0mA
Using [UP] or [DOWN], set the value for the desired output. Note, the value that you set is for
reference only. If you need a true 4.0mA's at the remote equipment, you should read the actual value
from the remote equipment and set the value here at whatever is required by that equipment. For
example, say a remote PLC needs exactly 4.0mA's at 0% stroke. The PLC currently reads its input as
3.8mA and the DLCM reads its output as 4.0mA. Increase the DLCM output (e.g., 4.2mA) until the
PLC reads correctly.
3. Once you have set the 0% value press [ENTER] to accept it. The screen that allows you to set the
output at 100% is displayed.
OUTPUT AT 100%
20.0mA
As described in step 2, set the output using [UP] or [DOWN]. When you are satisfied with your
settings press [ENTER] to accept it.
4. The DLCM will prompt you to accept the analog output calibrated values.
CONFIRM CHANGE?
YES
Press [ENTER] to accept the calibration. If you do not want to accept, press [UP] to display {NO}and
then press [ENTER].
The display will return to the last operating mode.
You can set the Analog Output to reverse acting by simply setting the output at 0% to be 20.0mA and
the output at 100% to be 4.0mA.