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User's Manual
Appendix 1 Symbol and Formula of Measurement
Measurement Function
[Unit]
Voltage TRMS [V]
Voltage DC Component [V]
Voltage AC Component [V]
RMS current [A]
Current DC Component [A]
Current AC Component
[A]
Active power P [W]
Power Factor [PF]
Uni-Trend Technology (China) Co., Ltd.
No.6, Industrial North 1st Road, Songshan Lake Park, Dongguan City, Guangdong Province, China
Telephone：（86-769）85723888
Postcode：523808
http://www.uni-trend.com.cn
Instruments.uni-trend.com
Operation Formula
1
N
2
Urms
u
(
) n
N
n
1
1
N
Udc
(
) n
u
N
n
1
Uac
Urms
2
Udc
2
1
N
Irms
( i
) n
2
N
n
1
1
N
Idc
( i
) n
N
n
1
Iac
Irms
2
Idc
2
1
N
P
[
u
(
n
* )
i
(
n
)]
N
n
1
P
Urms
Irms
UTE9800+ Series Smart Digital Power Meter
Explanation
u(n) represents instantaneous
value of voltage；
i(n) represents instantaneous
value of current；
N represents ADC sampling time
within the measurement range.
55 / 55
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