Electrical Specifications - SEFRAM 7220 Manuel D'utilisation

Electrical Specifications

Accuracy is given as ± (% of reading + counts of least significant
digit) at 23°C ± 5°C, with relative humidity Less than 80% R.H.,
and is specified for 1 year after calibration.
(1) Temperature coefficient
0.1 x (Specified accuracy) / °C, < 18°C, > 28°C
(2) AC Function
ACV and ACA specifications are ac coupled, true R.M.S.
The crest factor may be up to 3.0 as 4000 counts.
Accuracy is unspecified of Square Wave.
For non-sinusoidal waveforms, Additional Accuracy by
Crest Factor (C.F.) :
Add 3.0% for C.F. 1.0 ~ 2.0.
Add 5.0% for C.F. 2.0 ~ 2.5.
Add 7.0% for C.F. 2.5 ~ 3.0.
Max. Crest Factor of Input Signal:
3.0 @ 3000 counts
2.0 @ 4500 counts
1.5 @ 6000 counts
Frequency Response is specified for sine waveform.
LCD displays 0 counts when the reading < 20 counts.
(3) DC mV
Range OL Reading
600.0mV 660.0mV
Input Impedance : 10MΩ
Overload Protection : AC/DC 1000V
(4) DC Voltage
Range OL Reading
6.000V 6.600V
60.00V 66.00V
600.0V 660.0V
1000V 1100V
Input Impedance : 10MΩ
Overload Protection : AC/DC 1000V
Resolution Accuracy
0.1mV ± (0.5% + 5D)
Resolution Accuracy
0.001V
0.01V
±(0.5% + 2D)
0.1V
1V
20