From LabVIEW, how do I programmatically determine 'open thermocouple' status on a TC-120?

Apart from getting a large value (e.g., 1770 degC) on the channel when doing a FP Read, and getting a 33443 warning:
'Bad channel status reported by several channels. At least one channel is in one of the following states: Unconfigured, Bad Status "A", Bad Status "B" : FP Read.vi'
I can't find any utility VI which would give me a definitive 'open TC' status. Since MAX can report this, I figured there had to be a corresponding way in LabVIEW.
Thanks in advance for responses!
Dave
David Boyd
Sr. Test Engineer
Philips Respironics
Certified LabVIEW Developer

Thanks, Aaron. I admit I hadn't tried a single-channel read to see if the error got more specific.
I guess I shouldn't be so nit-picky, but it might've been nice if there were a multi-channel 'read status' FP VI. Having to read individual channels (with all those associated FP tags cluttering the BD) just to get status seems a bit inelegant, and defeats the efficiency gains of doing a module-wide read.
Alternatively, this looks like one of those places where returning 'NaN', or '+Inf', '-Inf', on a floating point FPRead, would be appropriate.
I suppose I can do an array test for '>=1770', then manipulate the data to convert open channel readings to NaN. (I like NaN since multiplot charts/graphs handle it as a pen lift, and omit it from aut
oscaling.)
Thanks again!
Dave
David Boyd
Sr. Test Engineer
Philips Respironics
Certified LabVIEW Developer

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From LabVIEW, how do I programmatically determine 'open thermocouple' status on a TC-120?

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