EndNode Issue: Ambient Temperature affecting signal output

We have two ASM1-1 Endnode that we are using to connect to a Flow Meter’s 4-20ma output. Current range on the Flow Meter is 0 to 3177 scfm.

Using your Alpha software to directly connect to the EndNode we are seeing a swing in the raw value displayed when our input (using an inline Fluke multimeter) is showing a steady 4.001 ma reading. Calculating the EndNode raw value into a pressure reading results in a swing from 0 to 5 scfm on one Endnode and 0 to 15 scfm on the other endnode during a temperature drop from 80F to 65F.

We have tested both units over several days, and both raw values increase as the temperature decreases.

Please advise.

Thanks!

what is the loop voltage ?
what the input power supply and is there any change it might be noisy ?