Iso-Tech IDM 97 - Page 14

14
* A.c. current conversion:
IDM97:
Mean measured - r.m.s. value displa
y
ed
IDM97RMS:
A.c. volta
g
e coupled measurement, true r.m.s. readin
g
s, calibration to the r.m.s. value of a sinusoidal
input volta
g
e, basis accurac
y
is for full scale deflection for sinusoidal volta
g
es and half scale deflection for non-
sinusoidal volta
g
es. In the case of non-sinusoidal volta
g
es, the followin
g
amounts should be added to the fi
g
ures for
accurac
y
:
Crest factor :
1.4 to 2: +0.5%
2 t o 2 . 5 : + 2 %
2.5 to 3: +4%