18
Electrical Specifications
Accuracy is ±(% reading number of digits) or otherwise specified, at 23
o
C ±5
o
C & less than 75% R.H.
True RMS ACV & ACA clamp-on accuracies are specified from 0% to 100% of range or
otherwise specified. Maximum Crest Factor are as specified below, and with frequency
spectrums, besides fundamentals, fall within the meter specified AC bandwidth for
non-sinusoidal waveforms. Fundamentals are specified at 50Hz and 60Hz.
AC Voltage
RANGE
Accuracy
50Hz / 60Hz
600.0V
0.5% + 5d
45Hz ~ 500Hz
600.0V
1.5% + 5d
500Hz ~ 3.1kHz
600.0V
2.5% + 5d
CMRR : >60dB @ DC to 60Hz, Rs=1k
Input Impedance: 2M
, 30pF nominal
Crest Factor:
model 157: < 2.3 : 1 at full scale & < 4.6 : 1 at half scale
model 357: < 2 : 1 at full scale & < 4 : 1 at half scale
ACV AutoVA
TM
Threshold: 30VAC (40Hz ~ 500Hz only) nominal
DC Voltage
RANGE
Accuracy
600.0V
0.5% + 5d
NMRR : >50dB @ 50/60Hz
CMRR : >120dB @ DC, 50/60Hz, Rs=1k
Input Impedance: 2M
, 30pF nominal
DCV AutoVA
TM
Threshold: 2.4VDC nominal
