Hi everyone I'm looking to build my own pressure transducer for in-cylinder testing and I have found a PT 0-400 bar range but it's output is in mA and not volts , now how do i set scope up for this shall I just use the amp clamp input?? Sorry if it's a stupid question.
Sorry Simon, I don’t know how I can help. how Many wires interfaces with this device?
Hi , it's just a power and ground and a signal output 4-20mA output, power input 8v-32v.
I don't see how that's going to end well. If you'd like i can sell you my 5v regulated style transducer setup. It's a custom box, 12v power supply. Two transducer inputs, one vacuum input. Two pressure sensors. I don't use it anymore since I've upgraded. But you also didn't mention what scope it was for. Anyway if you're interested let me know
Why would it be bad ??
Oops didn't see the spec sheet until now. What scope?
I have a pico , Snap on zeus, modis, vantage pro, and a bosch kts650.
If you could please send me some specifics about that transducer including manufacturer and part number I'll see if I can clarify that for you. I suspect the output is actually varying voltage but the application or possibly the description documents confuse the raw output of the sensor.
This is the spec sheet
This is interesting. So does this unit have 3 wires? I'm assuming a power & ground, and then a signal out?
Hi Simon, sorry to say that but I have some disappointing news, and they are not about 4-20mA issue. 400 bars is about 5800psi. With stated accuracy +/-0.5% of FS (full scale), that is 30psi. You are likely to have issues with accuracy in the region of interest for in-cylinder testing, 0-200psi. Some of the errors may be offset or calibrated out, but be ready for that. The next issue is
Thank you for that explanation , I understand more now.
Hi Simon, I'd like to echo everything that Dmitriy has said and just add to and round out the info that he's provided. I would add this; 4-20ma type devices are commonly used in industrial applications (think like a large factory maybe) where there might be a large amounts of electrical noise from all kinds of motors and devices running and or long distances between where the device is and the
Hi yes makes more sense now thank you
I'm actually thinking about doing the same thing, but with a TE M5200 transducer (several options for electrical & hose connections, pressure ranges, as well as supply & output voltage). What are you using for a power supply? Datasheet link: te.com/commerce/Docum… FYI, it's not on the datasheet, but an engineer at TE told me the resolution is 1KHz. Also, one of the listed
I have made my own transducer setup, including a separate 5v power supply that allows for 2 devices(transducer, map sensor, etc.) I have tested about a dozen different types of transducers, from $12 to $200..... Some important things I looked for were a ratio-metric linear voltage output compound transducer that operated in 5-15vdc range. A ratio metric linear voltage output sensor allowed
Thanks for the reply I appreciate all the info people have given .
Which transducer did you ultimately go with?