PH_meter_self checking - jimaobian/DFRobotWiki GitHub Wiki

This part will tell you how to check whether you get a fault ph meter. note: it is only suitable for V1.

  1. Make sure the power supply is standard 5.0V (Some computer can't provide enough power supply with 5V, generally it will be 4.8V or 4.9V)
  2. Power the ph convert board, follow the picture and measure the voltage of two capacitances. It should be close to 5V. (purple) Analog pH Meter Kit V1

3.Short current the BNC connector, like what I did in the photo. If you have a multimeter, measure its analog pin, it should be 2V. If you don't have multimeter. Connect the adapter to Arduino board, run the sample code. it should output PH:7 in the serial monitor. Analog pH Meter Kit V1

4.If everything goes well. It should work well. But don't forget to calibration. Note:

  • Please keep PH convert board clear, and leave it far away from the water. It is not a wateproof device.
  • It is a chemical device, the output value will exist some delay time when you plug it in the solution. pleas wait 30s. waiting its stable state.
  • Random value: please check the BNC connector, when the connector is not well, it will output random signal.