Specifications - Extech Instruments EX650 User Manual

6. Specifications
ELECTRICAL SPECIFICATIONS
Accuracy is given as ± (% of reading + least significant digits) at 23
Accuracy is specified for a period of one year after calibration.
1. Temperature Coefficient is 0.1 x specified accuracy /
2. AC Functionality: ACV and ACA specifications are AC coupled, True RMS; For non‐sinusoidal waveforms,
additional accuracy Crest Factor (C.F.) considerations exist as detailed below:

Crest factor 1~2, accuracy increases by 3%

Crest factor 2~2.5, accuracy increases by 5%

Crest factor 2.5~3, accuracy increases by 7%
Function
AC Current
*6A range on EX650 only
True RMS current applicable to 10%~100% of range; Frequency response: 50~60Hz
Accuracy value increases (5% typical) when measuring varying frequency for non‐sinusoidal wave (EX655)
Inrush measurement accuracy is not specified; Inrush measurements are offered for reference purposes only.
DC Current
Use ZERO to null display before taking a measurement.
AC Voltage
True RMS voltage applicable to 10%~100% of the range
Input Impedance: ≥ 10MΩ; Frequency response 40~400Hz
Accuracy value increases (5% typical) when measuring varying frequency for non‐sinusoidal wave (EX655)
AC Voltage (LPF)
AC Voltage (LoZ)
Input Impedance is approx. 3kΩ; Frequency response 40~400Hz
DC Voltage
Input Impedance: ≥ 10MΩ
Range Resolution
6.000 A* 0.001 A
60.00 A 0.01 A
600.0 A 0.1 A
60.00 A 0.01 A
600.0 A 0.1 A
6.000V 0.001V
60.00V 0.01V
600.0V 0.1V
750V 1V
600.0 V 0.1V
600.0 V 0.1V
600.0mV 0.1mV
6.000V 0.001V
60.00V 0.01V
600.0V 0.1V
1000V 1V
32
 
C ±5 C with relative humidity <80%.
  
C, < 18 C (64.5 F), > 28
Accuracy (reading)
± (2.5% + 30 digits)
± (2.5% + 5 digits)
± (2.5% + 5 digits)
± (1.2% + 5 digits)
± (1.5% + 5 digits)
± (6.5% + 5 digits)
± (1.5% + 5 digits)
± (1.0% + 5 digits)
± (0.8% + 1 digit)
± (0.8% + 3 digits)
± (1.0% + 5 digits)
 
C (82.4 F)
'OL' Protection
600A
600A
1000V DC
750V AC
1000V DC; 750V AC
1000V DC; 750V AC
1000V DC
750V AC
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