Hello,
I want to build a weight scale with 0.1 gram resolution. But i have some problems in my initial stage.
I am using a load cell with sensitivity of 1mv/v and excitation voltage of 3 v.
1. With no weight, the load cell output shows -0,089 mv and with full load(500gms) it shows 2,895 mv. Is -0.089 mv the noise of my load cell. If so, how could i solve this problem. why is my load cell mot showing an output of 3mv for 3 v of supply.
2. I have connected the load cell to IN amp ( PMI AMP04FP) with a gain of 100, with no load, i get an output of 3,203 mv and with full load i am getting an output of 278 mv.
my q: why is the inamp showing an output of 3,203 mv. is it the offset voltage. if so how could i solve the prob. why am i getting 278mv instead of 300mv
I have gone through the basics.But couldnt get my mind clear because of lot of information in small time. I know that my questions are basic and need some reading. I would be glad if someone could explain me what is happening and how to proceed. I am willing to learn . So, any kind of help( links, books etc) is appreciated. kindly go easy on me
I want to build a weight scale with 0.1 gram resolution. But i have some problems in my initial stage.
I am using a load cell with sensitivity of 1mv/v and excitation voltage of 3 v.
1. With no weight, the load cell output shows -0,089 mv and with full load(500gms) it shows 2,895 mv. Is -0.089 mv the noise of my load cell. If so, how could i solve this problem. why is my load cell mot showing an output of 3mv for 3 v of supply.
2. I have connected the load cell to IN amp ( PMI AMP04FP) with a gain of 100, with no load, i get an output of 3,203 mv and with full load i am getting an output of 278 mv.
my q: why is the inamp showing an output of 3,203 mv. is it the offset voltage. if so how could i solve the prob. why am i getting 278mv instead of 300mv
I have gone through the basics.But couldnt get my mind clear because of lot of information in small time. I know that my questions are basic and need some reading. I would be glad if someone could explain me what is happening and how to proceed. I am willing to learn . So, any kind of help( links, books etc) is appreciated. kindly go easy on me
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