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101A Power Meter Analyzer is suitable for measurements on electronically switched loads.
Because of their DC-coupling capability correct RMS and power values result at all times.
Take the case of line voltage multiplied by half wave rectified current. AC-coupling yields wrong RMS current and power. DC-coupling yields correct values.

Energy Meter Analyzer.

Model  Description 
101A-1  Single Phase Power / Energy Analyzer, 0.15% accuracy
101A-3  Three Phase Power / Energy Analyzer, 0.15% accuracy

The 101A Energy Meter Analyzer is simple to use. In the side menu you select current- and voltage ranges
(automatic or manual), synchronization, measurement time, special function "Peak-Hold",
and display modes L1, L2, L3, SUM, and ALL (3-phase display). In the display number fields you can
place any measured quantity from the measurement function selection table including harmonics of
current and voltage. In the graphics field waveforms and bar graphs of current and voltage can be displayed.

A load connection box is available which connects your single- or three phase load to the
Power Analyzer and to the wall power outlet.
Optional battery back-up is available for 6 hours autonomous operation.
It prevents data loss, such as energy, during power failure.

Power Meter Analyzer specification
101A Power Meter Analyzer
Voltage 4 ranges: 30V, 100V, 300V, 1000V, max. 600V
Frequency range  DC-50kHz 
Accuracy 23°C ±3°C;
10Hz-2kHz = ±(0.1% rdg + 0.1% range)
2kHz-10kHz = ±(0.8% rdg + 0.3% range) 
Current 5 ranges: 600mA,2A,6A,20A,60A; max. 40A continuous,
max. 100A for 1 second.
Frequency range  DC-50kHz 
Accuracy 23°C ±3°C;
10Hz-400Hz = ±(0.15% rdg + 0.15% range)*
400Hz-2kHz = ±(1.5% rdg + 1.0% range)*
Lowest range multiply percentage figures by 2. 
Power Accuracy: Add accuracy percentage figures of current and voltage, PF = 0 to ±1.
Vrms, Vmax, Vpeakhold, Arms, Amax, Apeakhold, power, apparent power,
power factor, energy, apparent energy, elapsed time, voltage- and current
harmonics n=1 to 20.
Display Blue liquid crystal graphic display with EL backlight. Displays values of each phase,
total values, or values of all three phases. Displays wave forms and bar graphs.
Options RS-232 Interface and Windows Operating Software (95, 98, NT, 2000, ME, XP).
Battery back up for 6 hours operation with built in charger.