Pulsafeeder Pulsar ECA NEMA4X - Manual (Page 25)

T
HIS PROCEDURE REQUIRES REMOVAL OF THE ENCLOSURE COVER . T HIS SHOULD BE DONE ONLY IF THE AREA
IS KNOWN TO SAFE FOR ELECTRONIC WORK .
To calibrate the analog output, attach a milli-ammeter to the output circuit of the ECA in series
with the PLC used to control the process (as shown in figure 7). It is recommended that you
calibrate the ECA analog output values to whatever is required by the PLC. For example, the
ECA output can be adjusted at the zero point so that the screen on the PLC system reads
zero %, regardless of the actual mA value of the signal. The ECA will not actuate to change
stroke length during this process.
1. With the cover removed and power supplied to the ECA, press the black Output Cal
pushbutton. The Cal Output LED will blink slowly and current output will be set to the present
analog out low calibration value. (4 mA factory default)
2. Press and hold the white Input Cal pushbutton to increase current
output until the desired low set point is reached. Release and press
again to decrease current output. Current will change in steps of
approximately 0.02 mA, at a rate of 20 steps per second.
3. Press the black Output Cal pushbutton. The Cal Output LED will
blink rapidly and current output will be set to the present analog out
high calibration value. (20 mA factory default)
4. Press and hold the white Input Cal pushbutton to decrease current
output until desired high set point is reached. Release and press
again to increase current output. Current will change in steps of
0.125 mA at a rate of 20 steps per second.
5. Press the black Output Cal pushbutton. The Cal Output LED will
extinguish, unless the minimum span of 2.0 mA is violated, then the
ECA will return to step 1 above.
6. Remove Power to the ECA. Replace the cover (see Section Cover
Re-installation) and return power to the ECA.
Figure 10
9. MECHANICAL ZERO CALIBRATION
T HIS PROCEDURE REQUIRES REMOVAL OF THE ENCLOSURE COVER . T HIS SHOULD BE DONE ONLY IF
THE AREA IS KNOWN TO BE SAFE FOR ELECTRONIC WORK .
If the ECA was shipped with a pump attached, the mechanical zero calibration was
performed at the factory. If the ECA was shipped without a pump attached, performing the
mechanical zero calibration is mandatory to successful installation/operation. The ECA
controller automatically performs a mechanical zero calibration if it does not have a valid
zero calibration set point stored. If you suspect the zero calibration set point is incorrect,
follow the calibration procedure below. The pump MUST be running during this
process to ensure an accurate zero position is calibrated. Therefore you MUST
ensure it is safe to operate the pump during the procedure.
• Verify that power to the ECA is off
• Remove the enclosure cover.
Figure 7
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