Đồng hồ đo điện một pha MICROTEST 7120

Model

7110

7120

Frequency Range

DC, 15Hz~10KHz

DC, 15Hz~100KHz

Harmonic (option)

● / –

● / –

Parameters

Range

Parameters

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

Current (fixed/Auto)

0.01A、0.03A、0.1A、0.3A、1A、3A、10A、20A

Voltage (fixed/Auto)

10V、30V、100V、300V、600V

Analysis base

To achieved stable fundamental frequency analysis by voltage or current (non-inverter)

Frequency Range 45Hz

45Hz – 440Hz

FFT Data Length

1024

FFT Data Format

32 bits

Measurement

1-50 THD, 1-50 level voltage and current V [n], A [n]

Projects

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]

Vrms, Irms, Watt, PF

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 4096×16 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)

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]

Funit 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
 – 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)

 – Frequency between 45-66Hz: Add 0.3% of reading.
 – Frequency between45-66Hz: 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 45Hz < f, Add±1.0% of VA
Situation 2: for 45Hz > f or f > 66Hz
Add ±{(3.5 + 0.5×f )% of VA} for up to 100kHz 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 45Hz ­ f ­ 66Hz. Add ±power reading *{tan(θ)*(0.5)}%
for f < 45Hz, f > 66Hz. Add ±power reading *{ tanθ*(0.5×f+0.2) }%

 Error within 12 months

  Add ±(0.5% of reading) 

Model

Support Harmonics
7110-10k-HARM

Support Harmonics
7120-100k-HARM

Don’t Support Harmonics
7110-10k

Don’t Support Harmonics
7120-100k

F71201 TEST BOX

Built-in stroage

6 Sets

Power Supply

Voltage

100 ~ 240Vac

Frequency

50/60Hz

Power consumption

300VA

Environment

Temperature

23℃±5℃

Humidity

20%-80%RH

Display

Seven-segment display

Dimension (W*H*D)

227x101x300 mm

Weight

1.85 Kg

Interface 

RS-232 (7110)、RS232 + GPIB (7120)