Đồng hồ đo điện một pha MICROTEST 7110/7120

Harmonics 

 Analysis base

45Hz ~ 440Hz

 FFT Data Length

32 bits

 Measurement 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

Specification

Model Name

Voltage 100 ~ 240Vac

Frequency 50/60Hz

Display

 RS232+GPIB

Flash Memory

Temperature:23℃±5℃   Humidity: 20%~80% 

Dimension (W*H*D)

1.85 Kg

Measurement bandwidth

Yes/NA

Model

7120-100K

Fixture

F71201 TEST BOX

Measurement Data

 Model

To achieved stable base frequency measurement(variation less than 1%)by voltage or current (non-inverter)

Frequency Range

Dual 4096x16 RAM for voltage & current

ADC Resolution

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

Arithmetic Precision

500Hz cut off, digital chip filter based on 25MHz

Signal Filter

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

Frequency Acquisition Mode

Subject to the current, analog / digital hybrid detecting (error less than 5 degrees)

Range

 Current (fixed / auto)

10V、30V、100V、300V、600V

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

>=15 Hz, f ≦ 45Hz

±(0.1% of reading + 0.1 % of range)

>66 Hz, ≦ 1 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℃)

±{(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) 

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

-180°~ +180°

Irms

15Hz ~100kHz