ACR Electronics PowerWatch, Справочное руководство

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Troubleshooting
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2007 ACR Systems Inc.
6.3
Voltage Disturbance Recorder
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.
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.
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PowerWatch time stamps are invalid after a prolonged period of time.
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minimum of once every four years.
To eliminate this issue, ensure that the PowerWatch VDR is cleared of data a