Multiple Comparisons on Single Data Source: NaN vs. Large Number

Hello All,
Working in TestStand 2013, and came across a situation with DMM measurements, in which several values would be acceptable for the limit comparison. For example, if I am making a resistance measurement, and I expect it to be a very high value, say greater than 1M, I would insert that as the lower limit. However, there are also certain situations when I may see the result of "NaN" at the meter. For the purposes of the test, any number greater that 1M would be acceptable, but a result of NaN would also be acceptable. In an effort to keep the code modular and reusable for many instances, I am curious if there is a way in TestStand to compare the test result against two values at the same time, (i.e. >1M OR =NaN). Please advise. Thanks.
GSinMN
Solved!
Go to Solution.

Probably because you are trying to set the Low limit property. You need to set the Low Limit Expression property and set the Use Expression flag to true.
Consider the screen shot attached. If UseLowExpr is False then the Low numeric property is used. If it is True then the LowExpr property is used.
Hope this helps,
jigg
CTA, CLA
teststandhelp.com
~Will work for kudos and/or BBQ~
Attachments:
LowLimitExpression.png ‏19 KB

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