18
If you want manual ranging, use the RANGE
and
keys to select a measurement range
consistent with expected voltage.
CAUTION: Do not apply more than 1000V peak
to the input or instrument damages may occur.
4. How to acquire a more accurate measuring result
If the “
.OL
” message is displayed in the primary display, press the up
key to select a higher
range until a normal reading is displayed (or press
key for auto ranging). Use the lowest
possible range for the best resolution.
5. Internal resistance of voltage measurement
DCV input impedance=10
M
Ω
1000V~10V range
10G
Ω
1V~100mV range
CAUTION: Maximum Input voltage=1010VDC
ACV Input Impedance = 1M
Ω
and 100pF
CAUTION: Maximum Input voltage= 750V RMS or 1000V peak
6. Crest
factor
AC voltage and current accuracies are affected by the crest factor of the waveform, the ratio of the
peak value to the RMS value.
Waveform
Crest factor CF
AC RMS
AC+DC RMS
1 v v
Table 3-1 Crest factor of some AC signal waveform
3.3 Measuring Current
Model TH1952 current measurement range: 1mA, 10mA, 100mA, 1A, 10A
Maximum resolution: 10nA (on 1mA range)
Summary of Contents for TH1952
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