Automatic Testing Equipment
Single-Phase Power Meter

MICROTEST’s single phase power meter 7110/7120 has the wave crest factor of the input current as CF3/CF9 and able to measure all the values within measuring ranges. They have the fastest auto-shift speed amongst other testers of the same level, and the measuring span can be locked on rapidly to perform accurate power consumption analysis. The measuring range of both PM7110/7120 are 0.001W~16KW, and they are able to measure AC power consumption containing DC and obtain power factors with higher accuracy while analyzing the current signals from devices with asymmetrical positive and negative waveforms. All the electronic devices on the market must comply with EU requirements for standby power consumption, and the manufacturers are making their effort to lower it as best as they can. PM7110/7120 are able to help the manufacturers to analyze power and energy consumption precisely and perform long-hours survey with a PC.

  • For AC / DC power measure / watt-hour meter
  • Wide range 0.001W ~ 16KW
  • Connection software attached
  • Current CF3/CF9
  • Standby Power D.P.I. of 0.001W
  • With crest factor ratio display
  • Up to the 50 orders harmonic analysis capability
  • 1000 sets of measurement data storage space


 Analysis base To achieved stable fundamental frequency analysis by voltage or current (non-inverter)
 Frequency Range 45Hz ~ 440Hz
 FFT Data Length 1024
 FFT Data Format 32 bits
 Measurement Projects

1-50 THD, 1-50 level voltage and current  V [n], A [n]
1-50 level voltage and current distortion percentage V [n%], A [n%]
1-50 level watts W [n]
1-50 level watts distortion percentage Watt W [n%]
1-50 level voltage and current angle DEG [n]
IrmsWatt PF


Model Name 7110  7120
Power Supply Voltage 100 ~ 240Vac
  Frequency 50/60Hz

Seven-segment display

Interface RS232  RS232+GPIB
Flash Memory 6 Sets
Environment Temperature:23℃±5℃   Humidity: 20%~80% 
Dimension (W*H*D) 335x103x335 mm
Weight  1.85 Kg

Measurement bandwidth

DC 15Hz ~ 10KHz DC 15Hz ~ 100KHz
Harmonic (Option) Yes/NA Yes/NA




Fixture F71201 TEST BOX

Measurement Data

 Model 7110 7120
Frequency Measurement Mode To achieved stable base frequency measurement(variation less than 1%)by voltage or current (non-inverter)
Frequency Range DC,15Hz~10KHz DC,15Hz~100KHz
Data Length Dual 4096x16 RAM for voltage & current
ADC Resolution 16 bits 
Sampling Rate

AC 50Hz / 60Hz basic sampling rate 100 KSPS / 120 KSPS

Arithmetic Precision Watt/VRMS/IRMS/MEAN/PF/Deg/Line filter 32bits
Frequency Filter 500Hz cut off, digital chip filter based on 25MHz
Signal Filter

500Hz -3db digital filter based on Butterworth

50Hz -0.03% reading, 60Hz -0.05% reading

Frequency Acquisition Mode Voltage / current 100MHz baseband digital dynamic meter chip
Phase Lead Detection Subject to the current, analog / digital hybrid detecting (error less than 5 degrees)


 Current (fixed / auto) 0.01A0.03A0.1A0.3A1A3A10A20A
 Voltage (fixed / auto) 10V30V100V300V600V

RMS/MEAN Mode Voltage & Current Accuracy (23℃±5)

>=15 Hz, f 45Hz ±(0.1% of reading + 0.4% of range)
>45 Hz, 66 Hz ±(0.1% of reading + 0.1 % of range)
>66 Hz, 1 kHz ±(0.1% of reading + 0.2 % of range)
>1 kHz, 10 kHz ±(0.07*f % of reading + 0.3% of range)
>10 kHz, 100 kHz ±(0.5% of reading + 0.5% of range) ±[{0.04×(f–10)}% of reading]

F unit is 1KHz

When the L-FILTER sets as ON:45Hz~66Hz frequency range allowable error-0.03 %~-0.05 of reading

When the AC is measured, if the fundamental frequency exceeds 200Hz, the F-Filter is required to be turned off in order to measure the most accurate value

**When the frequency range is more than 10KHz, the 7120 starts to support

DC Mode Voltage & Current Accuracy (23℃±5)

10V~600V ±0.2% reading ± 0.2% of range 0.01A ~20A ±{(0.2)% of reading + 0.2 % of range}±offset
To add up the OFFSET errors of various files during measuring the DC current

Power (W) Accuracy (23℃±5℃)


AC power ranges (Auto or Manual)(40 ranges) range up to 16KW
Maximum Power (W) value is determined by the highest range of voltage profile

DC ±0.2% reading ± 0.5% of range

15 Hz≦f

45 Hz≦f≦66 Hz ±(0.1% of reading + 0.1 % of range)

66 Hz<f≦1 kHz ±(0.2% of reading + 0.2 % of range)

1 kHz<f≦10 kHz ±(0.4% of reading + 0.3 % of range)± [{0.06×(f)}% of reading]

10 kHz<f≦100 kHz ±(0.5 % of reading + 0.5 % of range)±[{0.09×(f–10)}% of reading]

Incidental allowable error conditions
Signal filter error (AC) 

Frequencies between 45 to 66 Hz: Add 0.3% of reading
Frequency at 45 to 66 Hz: Add 1% of reading beyond

CF9 error (DC) Add range tolerance * 3
Accuracy effect of the phase error of the power

When the power factor PF is 0, the error range of Watt is

Situation 1: for 45 Hz<f

Situation 2: for 45 Hz>f or f >66 Hz

Add ±{(3.5 + 0.5 × f)% of VA} for up to 100 kHz as reference data

The unit for frequency f is kHz.

When the power factor is 0 < PF ≦error range

When 0<PF≦1 (θ: phase angle of the voltage and current)

for 45 Hz≦f≦66 Hz. Add ± power reading *{tan(θ)*(0.5)}%

for f < 45 Hz, f >66 Hz. Add ± power reading *{ tanθ* (0.5×f+0.2) }%

Error within 12 months Add ±(0.5% of reading)

Parameters Measurement Range

Vrms 0.1V ~ 600V PF 0.000 ~ ±1.000
Vdc 0.1V ~ 600V Deg -180°~ +180°
Irms 0.1mA ~ 20A THD 0.01% ~ 99.99%
Idc 0.1mA ~ 20A Hz 15Hz ~100kHz
W 0.01W ~16KW    


The measurements are utilized in environmental monitors, energy saving lamps, exchangeable power supplies, transformers, uninterruptible power systems, power tools, 3C electronic products, and home appliances, etc.



單相功率電表 power meter introduction (Microtest Corp.)

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Standard Accessories

  • Power Cord
  • User Manual
  • RS232 Cable
  • F71201 TEST BOX
  • TL218 Alligator Clips
  • TL208 2mm Test Prob

Optional Accessories

  • GPIB Cable