UNI-T UTE9802+, User Manual

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User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
34 / 34
3
）
After the replacement, please put the fuse box back , as shown in the following figure.
Appendix 1 Symbol and Formula of Measurement
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
Measurement Function [Unit] Operation Formula Explanation
Voltage TRMS [V]


 
N
u
N
1 n
2
) n (
1
Urms
u(n) represents instantaneous
value of voltage ；
i(n) represents instantaneous
value of current
；
N represents ADC sampling
time within the measurement
range.
Voltage DC Component [V]


 
N
u
N
1 n
) n (
1
Udc
Voltage AC Component [V]
2 2
Udc Urms Uac
 
Current TRMS [A]


 
N
N
1 n
2
) n ( i
1
Irms
Current DC Component [A]


 
N
N
1 n
) n ( i
1
Idc
Current AC Component [A]
2 2
Idc Irms Iac
 
Active Power [W]


 
N
n i n u
1 n
)] ( * ) ( [
N
1
P
Power Factor [PF]
Irms Urms
P
