User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
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Voltage Range
Decreasing
Urms is less than the lower part range about 80% ( CF < 2)
Current
Range
Increasing
Irms exceeds the measuring range about 110% ( CF < 2 )
Current
Range
Decreasing
Irms is less than the lower part range about 60% ( CF < 2 )
Pre-heating Time
>30 mins
Current Peak
The maximum display 24A
Maximum of Allowed Input for
Continuous
Voltage 700V
，
Current 24A
Maximum of Allowed Input for
Instant
1000V, 40A (1 min)
Input Impedance
Voltage about 2 M Ω
，
Current is less than 0.02Ω
Upper/Lower limit
Four settings for the upper/lower limit of power and current
P Hi (Power high),
P Lo (Power low),
A Hi (Current high),
A Lo (Current low)
Average Function
√
Interface
RS232
（
DB9 ; 2-pin: TX, 3-pin: RX, 5-pin: GND)
RS485 (DB9 ; 8-pin: A , 9-pin: B )
Baud Rate
4800
，
9600
，
19.2K
，
38.4K
，
57.6K
，
115.2K
，
default 9600.
It follows communication protocol of standard SCPI and Modbus-
RTU.
Display Hold
√
Mute
√
Lock Key
√
Power Source
Input power
：
AC 100V~240V Frequency 50/60Hz
Precision Environment
18
℃
~28
℃
，
30%~75%RH (28
℃
< operating temperature < 18
℃
(when in 18
℃
, it needs to add temperature coefficient)
：
reading of
0.05%/
℃
)
Storage Temperature
-10
℃
~50
℃
，
non-condensing below 80% RH
