Triggering DAQ Assistant from Serial Data

[complexation]

Having difficulty triggering a device through DAQ assistant. I wrote a custom python script that assesses the stability of the last 15 measurements on my Tektronix voltmeter, and returns an integer, '1' if they are all stable, then converts into a TRUE/FALSE Boolean. I then pass this to a Boolean converter to satisfy the DAQ input requirements. I have made this work with a much simpler code, using a push button which to my understanding does the same thing as what I'm attempting to do. However, I never successfully trigger the DAQ unless using the simple push button VI. Appreciative of any help.

[ZYOng]

How is writing data to digital output related to triggering?

[complexation]

I want a certain stability threshold of voltage from the Tektronix voltmeter to trigger the DAQ assistant, the same as pushing the button on the first VI does.

[complexation]

Trying another approach here. The DAQ will simply not trigger if I don't use a push button. Feeling lost.

[santo_13]

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@complexation wrote:

I want a certain stability threshold of voltage from the Tektronix voltmeter to trigger the DAQ assistant, the same as pushing the button on the first VI does.

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Have you reviewed your Tek voltmeter manual to see if there is any feature that you can configure for the DMM to generate the trigger signal instead of you having to read it in software and trigger the DAQ?

What Tek model?

[complexation]

It's a Tektronix DMM4050. I'm only using the Tek to read voltage. The python script I wrote 'decides' when the voltage is stable enough to trigger a dosing step on my Metrohm 876 Dosimat via the DAQ.