AI523 as RTD module
I am using AI523 as a rtd module. For checking, I am using a 100 ohm resistance in place of RTD. The connection is same as shown in AC500 manual i.e., two wires connected to 2.0 and 2.1, return line connected to 1.0 and 1.1. Now, the problem is I am getting a count of 1300 for the resistance connected and LED is glowing for the corresponding input. I have configured the input for PT100 (3 wire) -50 to +400 deg c. What should be the maximum count for the scale and what should be count for connected resistance. Please help.
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If you are using AI523 for a 3-wire RTD input, the scaling value will be zero degree correspond to value zero, 400.0 degree will correspond to 4000 and -50 degree will be scaled to -500. In your case check the connected resistance value is exactly 100 ohm across the terminals. Refer the screenshot for the scaling ranges.