Specifications

BLACKBOX PORTABLE QUICK REFERENCE GUIDE
July 2010
Elspec | On Site Setup
III—11
Voltage & Current
 From MonitoringVoltage & Current, verify RMS values for both
voltage and current are the expected values.
If incorrect, check the PT/CT ratios as well as the connection of the voltage
and current probes to the device and the power source.
Monitoring/Power
 From MonitoringPower, verify the Active power readings are
positive integers.
If the active power reading in any phase is negative (yellow highlight), then
change the relevant phase from Normal to Reverse in
ConfigurationCurrents or reverse the polarity of the current clamp at
the power source by changing the direction.
Generators commonly display a negative Active power value.