Optional Local Monitoring
Power Meter
The Geist PM-1 power meter is a low-power, high accuracy meter capable of measuring true
RMS Current, Voltage, Power, and Power Factor. These values are individually shown on an
easy to read, 4-digit LED Display, which continuously scrolls through the four different
measured values. Each one of these displayed parameters is defined below. The Power Meter
will automatically begin cycling through the displayed values when the PDU is connected to AC
Mains power.
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Current: PDU output current draw measured in true RMS Amps
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Voltage: PDU output voltage measured in true RMS Voltage
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Power: PDU output power measured in Watts – referred to as real or active power
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Power Factor: Ration of real PDU output power to apparent PDU output power
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Power Meter Display
Current Meter
The Geist CM-1 current meter is a low-power, high accuracy meter capable of measuring true
RMS Current. The value of current is continuously shown on an easy to read, 4-digit LED
Display. The Current Meter will automatically begin to display value of output current when the
PDU is connected to AC Mains power.
Current Meter Display
GM1001.doc
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Revision Date: 3/25/2009
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Real power is the power in a circuit that is transformed from electric to non-electric energy, while
apparent power is the total power supplied to the circuit.
