www.procontechnology.
com
.au
Phone: (03) 98306288
Setting the Shunt rating of the DPM
If you want to change the DPM shunt rating to match your shunt, proceed as follows:
1. After checking the DPM is in good order, power down the unit – if necessary, unplug the phone jack from
the interconnector.
2. Plug in the supplied external power plug into the 5V-GND-RC socket. A 9V battery connected to the
positive (red) wire and negative (black) wire is best to power the unit whilst the shunt rating is being set.
3. Power up the unit and when the “External Shunt” is displayed, press and hold the reset button for 3
seconds.
4. Release the reset button and note that the LCD will show the current DPM shunt setting. Fig. 1.
5. A quick press on the Reset Button will cycle the shunt setting from 100A to 200 A. Press again for 50A
and again to go back to 100A. Fig. 1, 2 and 3. Select the required shunt setting in this way.
6. Make a quick connection of the black (GND) and white (RC) wires to confirm the currently displayed
shunt setting and the LCD will then show the normal data display. Fig. 4.
7. Power down the unit and power up again and verify that the “External Shunt” is set correctly.
8. Plug the phone jack into the new shunt and check that the readings are correct.