benag6
Newbie level 4
![Newbie level 4](/styles/images/ranks/blevel1.gif)
Hi friends,
I have few doubts regarding with calibration of energy values using AD7755.
I got the following measurement values. Can any one check and suggest me whether What I did is right or wrong.
Line voltage:220 v ac.
test current(lb)=2A
CT ratio is 1:2000
As i am getting the pulses values from CF pin.I made following settings
1. scf=0;s0=s1=1
2. gain=16
Obtained voltage at v1p=5mv;v1n=5mv; burden resistance=5ohms and 5 ohms center connected to ground.
By calculation,
I did the following
cf=0.888*(220*2) =~.4hz
to find v2,using formula given indata sheet:
v2= 0.4*2.5*2.5/(10mv *16*13.6*8.06)
v2=142mv
I do get the pulses at cf pin.
reply ur ideas and suggestions.
with regards,
:roll: nakkeeran
I have few doubts regarding with calibration of energy values using AD7755.
I got the following measurement values. Can any one check and suggest me whether What I did is right or wrong.
Line voltage:220 v ac.
test current(lb)=2A
CT ratio is 1:2000
As i am getting the pulses values from CF pin.I made following settings
1. scf=0;s0=s1=1
2. gain=16
Obtained voltage at v1p=5mv;v1n=5mv; burden resistance=5ohms and 5 ohms center connected to ground.
By calculation,
I did the following
cf=0.888*(220*2) =~.4hz
to find v2,using formula given indata sheet:
v2= 0.4*2.5*2.5/(10mv *16*13.6*8.06)
v2=142mv
I do get the pulses at cf pin.
reply ur ideas and suggestions.
with regards,
:roll: nakkeeran