Omega CNI8DV, CNI16D, CNI8C, CNI8DH, CNI32 manual For example

Accuracy of Analog Output board is +/-1% of FS (Full Scale) when following conditions are satisfied:

1.The input is not scaled below 1% of Input FS (10 mV @ 1 V or 0.2 mA @ 20 mA input ranges).

2.Analog Output is not scaled below 3% of Output FS (300 mV @ 10 V or 0.6 mA @ 20 mA output ranges).

Otherwise certain corrections need to be applied.

For example:

For entire range of process input, the Analog Output on 10 V FS scaled for

300 mV output range:

Rd1 = 0000, Out1 = 00.00

RD2 = 9999, Out2 = 00.30

The measured output will be as follows:

Rd1 = 0000, Out1 = -0.07 V

Rd2 = 9999, Out2 = 0.23 V

This means that for 300 mV output range we have -70 mV offset at zero and at full scale. In order to compensate this 70 mV offset the correct scaling will be as follows:

Rd1 = 0000, Out1 = 00.07

Rd2 = 9999, Out2 = 00.37

The above corrections need to be applied only for Input scaled below 1% of FS and Output scaled below 3% of FS or if you need the Analog Output accuracy to be better than 1% of FS.

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