I am not positive on this, but if I am remembering correctly it is used like an offset. so if your chiller is saying the water is 77 degrees, but you measure it and it is really 75 you can change the digital part by -4 to +4 to make it read properly.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
Some strive to be perfect.... I just strive.
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