User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
17
/
34
Chapter 4 Measurement
4.1 Measurement Range
4.1.1 Voltage Range
·Step
Press
【
V.Range
】
key to switch to voltage range.
·Explanation
The range can set to Auto, 600V, 300V, 150V or 75V.
The display interface will synchronous display the current selected voltage range.
4.1.2 Current Range
·Step
Press
【
A.Range
】
key to switch to current range.
·Explanation
The range can set to Auto, 20A, 8A, 2A or 0.5A.
The display interface will synchronous display the current selected current range.
4.1.3 Manual/Auto Range
•Manual Range
If the measurement range is set to manual range, the selected range will not be change even if the size
of input signal changes.
The manual range can select from the following options.
Voltage range
：
600V, 300V, 150V, 75V.
Current range
：
20A, 8A, 2A, 0.5A.
•Auto Range
If the measurement range is set to auto range, the instrument will synchronous switch range according
to the size of input signal.
Voltage Range Increasing
The voltage range will increasing when any one of the following condition is met.
Urms exceeds measurement range about 110%.
Upk exceeds measurement range about 170%.
Voltage Range Decreasing
The voltage range will decreasing when any one of the following condition is met.
Urms is less than the lower part range about 80%.
Upk is less than the lower part range about 170%.
Current Range Increasing
The current range will increasing when any one of the following condition is met.
Irms exceeds measurement range about 110%.
Ipk exceeds measurement range about 170%.
