User Manual
The menu system
Ranging
Ranging sets th
e voltage or current range to a particular fixed range or to allow
ranging to automatically occur, depending on the application. For example,
current inrush testing requires the current range to be fixed; auto-ranging would
not be fast enough to capture the highest current inrush. The list of available
current ranges depends on the selected shunt.
The ranges are set on a group basis. The ranges will be as follows:
Table 5: Input ranges
Range # Volts 30 A shunt 1 A shu nt Ext. shunt
Auto
4 5 V 0.5 A 0.0125 A 0.05 V
5
10 V 1 A 0.025 A 0.1 V
6 20 V 2 A 0.05 A 0.2 V
7
50 V 5 A 0.125 A 0.5 V
8 100 V 10 A 0.25 A 1 V
9 200 V 20 A 0.5 A 2 V
10 500 V 50 A 1.25 A 5 V
11 1000 V 100 A 2.5 A 10 V
12 2000 V 200 A 5 A 20 V
Fixed/Auto ranging. Auto ranging is the default selection; this is the b est choice
for most measurements. Choosing a fixed range can be useful if the voltage or
current is changing continuously or has large peaks that make the power analyzer
spend excessive time changing ranges.
If you choose a fixed range, or the peak of the input signal is larger than the range,
then an over range condition will occur. This will be indicated on the screen by
al
l the results in the over ranged channel flashing on and off. In addition, the
“Vrms” and/or “Arms” will flash to indicate whether the over-range is on either
the voltage channel, the current channel, or both.
50 PA3000 Power Analyzer User Manual