3-wire Pressure Transducer

[Jeiel97]

Hi Good day, I am try to find an answer about on how to connect my 3-wired pressure transducer to an NI 9219 universal analog. NI 9219 is the only module that is available in our institution and only module that is compatible in reading pressure transducer. I'll be honored and thankful if someone can fixed my problem on how to connect my pressure transducer to NI 9219.

[santo_13]

Can you share more details on your Pressure Transducer? model? link to a datasheet or user manual?

[Jeiel97]

Attached photo is the pressure transducer that I bought.

Here are the Specification:

Item Type: Pressure Transducer

Material: Stainless steel

Overload Pressure Range: 100PSI

Overload Pressure: 1.5 times rated pressure

Breaking Pressure: 3 times rated pressure

Operating Temperature: -40℃-125℃

Output Signal: 0.5V-4.5V linear voltage output

Accuracy: Within 2% of reading (full scale)

Thread: 1/8in 27NPT thread

Media Compatibility: Refrigerant, clean non corrosive oil, gas and water, etc.

Wiring Connectors: Watertight quick disconnect. Includes mating connector (standard Packard Metri pack connector) and wiring harness (pigtail).

Wiring: Red +5V. Black for ground. (sometimes green) Blue for signal output

[Henrik_Volkers]

Your sensor needs a 5V supply voltage , as far as I understood the 9219 spec ,this unit can't supply 5V

so you need an external 5V supply  (red and black) . the voltage out pin (blue)  and black go to the 9219

[Jeiel97]

Can you please elaborate further? i didnt get it totally especially the the color assignments

Thank you

[Henrik_Volkers]

What cable colors do you have on your sensor?

Since you already ask aboout the cable colours, I assume you have no engineering background.

You need a 5V power supply. You can try one of these 500mA 5V chargers, but you need to check if they really put out 5V (some do more) and usually the 5V provided is not very 'clean' , mean you migth measure some nasty hum or other stuff due to the switched power supply. Nice would be a bench lab powersupply set to 5V.

the black(or green) cable from your sensor needs to be connected to the negative powersupply and the [negative/GND/AI- ] input of your 9219 channel . the red cable need to connected to the +5V of yur powersupply and the blue to the [positive/AI+] input of the 9219.

[Jeiel97]

Thank you for the reply.
My sensor has Green, Black, and Red wires. 

[Jeiel97]

Greetings, 

the sensor still wont read. I've the wire connection you've suggested 

[santo_13]

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@Jeiel97 wrote:

Greetings, 

the sensor still wont read. I've the wire connection you've suggested 

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Unfortunately, there is no way we could verify your connections and how you attempted to read the sensor.

Please provide all relevant information as we are limited to what you post here.