Feature Requests
Auto Shunt Calibration For Strain Measurements

We have to do auto shunt calibration process through program.
For example,
If we have Strain-1, then after offset removing process as we connect the 17134 Ohm or 174650 Ohm then strain value must come as 10000 or 1000 macrostrain, but unfortunately there again some offset for individual channel offset id differ from each other, So we want to remove this offset ,
Please suggest and support on this...

Best Regards,
Pratik A

We have to do auto shunt calibration process through program. For example, If we have Strain-1, then after offset removing process as we connect the 17134 Ohm or 174650 Ohm then strain value must come as 10000 or 1000 macrostrain, but unfortunately there again some offset for individual channel offset id differ from each other, So we want to remove this offset , Please suggest and support on this... Best Regards, Pratik A

Hi Pratik,

As the connection to the logger is on and off depending on sampling rate there will be a slightly different value in every reading because the closing relay may have a small variant in the resistance. That variant can also because the effect on the configuration. Current bridge will give you accuracy about 30 ppm while voltage bridge is about 10 ppm.

If you need a value closer to target please use voltage bridge but of course it will not be 0 ppm difference on each reading at reference strain.

Best regards,
Rudy Gunawan

Hi Pratik, As the connection to the logger is on and off depending on sampling rate there will be a slightly different value in every reading because the closing relay may have a small variant in the resistance. That variant can also because the effect on the configuration. Current bridge will give you accuracy about 30 ppm while voltage bridge is about 10 ppm. If you need a value closer to target please use voltage bridge but of course it will not be 0 ppm difference on each reading at reference strain. Best regards, Rudy Gunawan
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