Loadcell readngs help please.
Loadcell readngs help please.
(OP)
Hi
I have the following setup:
Loadcell 20Kg 3mv/v
Excitation 5V (full scale is 15mv)
Load cell outputs to INA125P
Ina125P is providing the excitation voltage and is configured for a gain around 333 to give full scale at 5v (15mv x 333 = 4.99V).
I have 2 calibrated weights 0,459Kg and 1,150 kg
I got the following readings (fluke multimeter)
No weight
At load cell terminals At INA125 output
No weight 110 uV 70,7 mV
0,459kg 460 uV 165,4 mV
1,150kg 970 uV 353.3mV
1.609kg 1.32 mV 479 mV
This does not make sense to me. Specially at the Ina125 output.
Should I use some kind of linearization formula ?
thanks in advance for any help.
M.
At the
I have the following setup:
Loadcell 20Kg 3mv/v
Excitation 5V (full scale is 15mv)
Load cell outputs to INA125P
Ina125P is providing the excitation voltage and is configured for a gain around 333 to give full scale at 5v (15mv x 333 = 4.99V).
I have 2 calibrated weights 0,459Kg and 1,150 kg
I got the following readings (fluke multimeter)
No weight
At load cell terminals At INA125 output
No weight 110 uV 70,7 mV
0,459kg 460 uV 165,4 mV
1,150kg 970 uV 353.3mV
1.609kg 1.32 mV 479 mV
This does not make sense to me. Specially at the Ina125 output.
Should I use some kind of linearization formula ?
thanks in advance for any help.
M.
At the





RE: Loadcell readngs help please.
RE: Loadcell readngs help please.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Loadcell readngs help please.
In fact the offset is strange. But the connections are exactly the ones in INA125 datasheet. The load is zero. I have the load cell in my bench.
melone: What do you mean by R2=0.9966 ?
Thanks
M.
RE: Loadcell readngs help please.
R2 probably means the regression coefficient. Your .9966 is not bad - but also not very good. It is OK, I would say.
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Loadcell readngs help please.
RE: Loadcell readngs help please.
OBG