Hello,I have to build a system for PH measurement, i am using 4-20 mA current loop for reading PH value from the sensor. My question is what electronic circuit design i should use to read the 4-20 mA current output from the sensor. I am thinking to use CN0336 board , but is it compatible with arduino or i will have to use a different microcontroller.
Thank you for having an interest on CN0336. The product that you are interested at is a standard PMOD form factor fully Isolated, Data Acquisition System for 4-20 mA Inputs. It is fully compatible with EVAL-ADICUP3029, which is an arduino based Wireless Development Platform for Internet of Things applications based on an ultra-low power ARM Cortex-M3 processor. For more information about the ADICUP3029, kindly visit: https://wiki.analog.com/resources/eval/user-guides/eval-adicup3029.
The ADICuP3029 runs in an environment called CrossCore Embedded Studio (CCES) to create, import, build and debug applications for the ADuCM302x processor. to learn more about the IDE, kindly visit: https://wiki.analog.com/resources/eval/user-guides/eval-adicup3029/tools/cces_user_guide.
Let me know if that answers your queries.
To add onto what Erbe said, you could attach the CN0336 to the Arduino Uno R3, but you would need to use some wires to connect the SPI lines/PWR/GND from the CN0336 over to the Arduino, and then you'd have to write your own program to make it function.
Erbe mentioned another platform board that you could use directly with the CN0336, and that platform is the ADICUP360.(The ADICUP3029 will also connect to the CN0336, but currently there is no code available on that platform) There is already a code example written for it which you can get all the instructions from on this user guide. https://wiki.analog.com/resources/eval/user-guides/eval-adicup360/reference_designs/demo_cn0336 and the code can be found here https://github.com/analogdevicesinc/EVAL-ADICUP360/tree/master/projects/ADuCM360_demo_cn0336
You could use this code and port it over to the Arduino if you want, but ADI will only support the code we develop on the ADICUP360 platform.
Hope this is also helpful.
Hi brandon thanks for your reply, further i want to ask whether you have some solution which has 4 channel adc's, as i have 4 parameters to measure along with the ph.
I'm not sure if I have a 4-channel ADC solution for pH completely done at this moment. But please have a look at the CN0398 design. (www.analog.com/CN0398 ) This has pH and you could copy and paste that circuit a few times using that ADC. Should be a good starting point for you.