How do I trouble shoot wiring errors with the DMMS 300+?
The DMMS 300+ is capable of troubleshooting wiring mistakes. If the meter is in Delta mode you will need to program it, temporarily, to WYE. If you have negative power readings, low power factor, large amount of neutral current, you can use certain functions of the DMMS 300+ to determine the cause of the problem. Trouble Shooting Negative Power Readings: While in WYE mode press the “Power” key and most of the light under the “Power” label should light up. Press the “Phase/Next” until the LED for “kW” or “MW” lights up. Now press the “Power” keys and do not release it. You should be able to observe at that instant the total power for each phase. You should see the individual lights under the “AMPS” label light up and a value of “kW” or “MW” displayed on the bottom display. If one of the is negative, that would indicate that you have a reversed wire on one of your “CT’s”. However before you change the wiring on your CT please review the following instructions. Phase Reversal Detection If
