User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
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Current Range Decreasing
The current range will decreasing when any one of the following condition is met.
Irms is less than the lower part range about 60%.
Ipk is less than the lower part range about 170%.
4.3 Measurement Mode
·Step
1. Press
【
SETUP
】
key to enter SETUP menu
，
the current submenu is “MODE”, as shown in the following
figure;
2. Press
【
ENTER
】
key to enter the next option, and then press
【
↑
】
or
【
↓
】
key to select ACDC
，
AC or DC;
3. Press
【
ENTER
】
key to select the current selected option and save it
；
4. Press
【
←
】
or
【
→
】
key to select other submenu, or press
【
SETUP
】
key to exit SETUP menu.
·Explanation
Measurement Mode
Measurement Mode
Voltage
Current
ACDC
（
AC+DC)
TRMS
TRMS
AC
AC component
AC component
DC
Simple average
Simple average
Theoretical Equation
ACDC (AC+DC): Select this mode to display the TRMS value of the voltage and current.
T
0
2
dt
)
t
(
f
T
1
DC
：
This mode is for inputting DC voltage and current, it will execute simple average for input signal.
T
0
dt
)
t
(
f
T
1
AC
：
Display the AC component of voltage or current.
f(t): input signal
T: a period of input signal
f(t): input signal
T: a period of input signal
