niDMM_IsOverRange

The ' niDMM is off "function does not return a true value when the Signal is Over Range

Basically, how the document reads the behavior is inconsistent or unpredictable. The doc does not what instruments/scales/measures, the IsOverrange function will work perfectly with (other than 'For example'.)

However, this KB is 2.5 DMM OR. Does anyone know if this is fixed in subsequent revisions? I have a 4070 with 3.1 and it 'appears' to work when I test it on the bench, but the wording on the KB makes it sound like do not trust - very ambiguous wording: 'Sometimes' and 'modules '.

Hi Marc,

When a measure is greater than the specified range, but not more than 105% of the beach, it's normally a discount and a warning will be returned. If a measure is greater than 105% of the specified reange, then the measure will be replaced by a NaN and a warning will be returned. In addition, if a masurement is currently the range, it will be replaced by - Inf and a warning will be back.

simple niDMM_IsOverRange checks that a NaN value sets the Boolean value true if the value is NaN. Thus, if a measure between 100% and 105% of the beach, the only indication you will get is in the return of niDMM_Read/niDMMReadMultiPoint/niDMMReadWaveform warns.

Tags: NI Products

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