phone jack to Cdaq

[stndndd]

Hello,  

excuse my if this is not the right board topic.
So, we were working on the following pressure gauge shown here: https://www.mksinst.com/mam/celum/celum_assets/resources/GP-360Controller360119-MAN.pdf 
Since the one we have, its pressure cannot be read directly using a serial communication, so checking section 3.5.1 we can see that the pressure can be read via analog output by a 1/8 in miniature phone jack as specified. My question is how can this voltage be read by my Cdaq? Is there a way to convert this phone jack into rs232 signal since i already have a usb to rs232 module installed? 
Regards,

[crossrulz · Accepted solution]

You need an Analog Input module to read the output voltage and then do the math as described in 4.9 to get your pressure measurement.

[stndndd]

I see, thank you.
I have few more questions if you can help me.
So how do I connect it to the analog module since it's a jack input on the machine, is there a specific wire?

Getting an analog module might take some time, I was thinking does an audio jack to Rs232 work?  Will i be able to read the voltage value if I implement it?

[crossrulz]

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@stndndd wrote:  I was thinking does an audio jack to Rs232 work?

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You really need to think about what your signals actually are.  RS-232 is a weird digital protocol.  The phone jack is an analog signal.  The type of jack is just the connection; it has nothing to do with the signal on the cable.  So you will need an Analog To Digital Converter (ADC) of some sort.  The simplest way, since you are already working with a cDAQ (or so your subject title states), would be to get a simple C-Series DAQ module and use DAQmx to read the voltage.  The manual claims there is a cable supplied to use that jack.

[stndndd]

Much thanks, I appreciate it