Mastech MS8251B, Руководство по эксплуатации

Страница: 6 / 12

09 10
3.2.3 DC Voltage
3.2 Technical Specifications
3.2.1 True RMS Characteristics
• For non-sinusoidal signal measurement, the Meter
provides more accurate measurement than the
traditional averaging method.
• If in AC current mode, the Meter may display a random
reading between 1 and 50 when the input is not active.
This will not affect the accuracy of measurement.
• True RMS requires a minimum input level, AC current
or voltage should be 2%~100% of the maximum level.
3.2.2 Dual Impedance Characteristics
• Normal impedance(10M) with normal testing capabilities.
• Low impedance Lo-Z (400k
Ω ) for testing where “ghost
voltage” may be present.Ghost voltage can occur when
power supply conductors and adjacent unused
conductors create a capacitive coupling between
conductors.If this possibility exists, or when testing for
the presence of voltage, use the Lo-Z mode to switch to
the low impedance setting to remove the ghost voltages
during measurement.
- Input impedance: 10M Ω
- Overload protection: 660mV range: 250V DC or AC
(RMS),6.6V-1000V range: 1000V DC/AC (RMS)
- Maximum input voltage: 1000V DC
0.1mV
±(0.8% of r 3 digits)
660mV
0.001V
0.01V
0.1V
1V
6.6V
66V
660V
1000V
±(0.5% r 5 digits) of
Resolution Accuracy
range
±(0.8% r 3 digits) of
3.2.4 AC Voltage
Frequency Range
40 ~ 60Hz
40 ~400Hz
40 ~ 400Hz
- Input impedance: 10M Ω
- Overload protection: 660mV range: 250V DC or AC
(RMS),6.6V-1000V range: 1000V DC/AC (RMS)
- Maximum input voltage: 1000V AC (RMS)
-
: Response True RMS
0.1mV
±(1.5% reading
+ 5 digits)
of
660mV
0.001V
0.01V
0.1V
6.6V
66V
660V
±(1.2% reading
+ 5 digits)
of
Resolution Accuracy
range
±(1.0% reading
+ 3 digits)
of
3.2.4.1AC Voltage (A position)
1V 1000V