Voltage Disturbance Recorder - ACR Electronics PowerWatch Reference Manual

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6.3

Voltage Disturbance Recorder

PowerWatch voltage readings can be different on various meters. A

PowerWatch VDR reads voltage in average RMS, while some

manufacturers' meters may calculate and display True RMS.

Date and/or time are not correct. The PowerWatch uses the PC's internal

clock to reference the time of the downloaded data. Set the PC's internal

clock to the current time. The Windows 3.1 User's Guide, under System

Time and Date, will explain this procedure; in Windows 95 click Help, time,

and changing your computer's time. Make sure that the time format is either

24-hour or AM/PM, not both.

PowerWatch time stamps are invalid after a prolonged period of time.

To eliminate this issue, ensure that the PowerWatch VDR is cleared of data a

minimum of once every four years.

Two PowerWatchs have different impulse readings on the same circuit.

Locally generated impulses can carry relatively little power. One VDR can

absorb some of the energy leaving less for the next one in the series to

read.

PowerWatch records long periods of large NG surge. The VDR has

been plugged into a convenience outlet that has been wired with the hot and

neutral lines reversed.

PowerWatch does not record any data. The VDR does not record events

while communicating. Make sure that realtime display is stopped.

PowerWatch will record events in 8 to 16 seconds thereafter.

ACR Systems Inc.

2007 ACR Systems Inc.

Troubleshooting

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