Analog input scalling load cell

[marcinmrag 1]

Hello,

Can someone explain me how to scale the analog input correctly?

I have cp1w-ad042 analog card with 12000 resolution. I want to connect to this card load cell with range from 0 to 3kg. I would like to have 0,01 g accuracy of measurement. It is possible? My load cell has 2mV/V sensitive.

[Sergei Troizky 26]

Even assuming a load cell being a proper signal source for 0..5VDC input (which is not true):

0.01g is 0.00033% of 3kg.

The CP1W-AD042 accuracy at 25°C is 0.2% full scale, and becomes 0.5% in 0..55°C range.

Make the conclusion yourself.

[Mendon Systems 22]

Another way to look at it ....

The resolution of the AD042 will be 3000/12000 or 0.25 g increments. The accuracy depends on a lot of factors including the sensor, the analog module, and the power supply. The accuracy will generally be approximately resolution x 10 or 2.5 g in this case.

[james_applied 0]

Is the analog card the correct card.

There is an F159 card. This is a weight cell specific card. It does require reading of the manual for the setup and calibration.