Analog pH Sensor / Meter Kit V2, SKU: SEN0161-V1
Account cancelled 2021-01-06 05:43:18 778 Views0 Replies Hi,
I have a SEN0161V1 ph probe connected to a Arduino Nano. I use the code from https://github.com/DFRobot/DFRobot_PH with the combined EC & PH measurement example. I also used the code associated with the RS stock number. I rinse the probe in distilled water between measuring in the various solutions and the power is supplied via the PC USB & Nano 5V connection.
I have not been able to calibrate this sensor with PH7 & PH4 solution as the software advised that the PH's are out of range.
I get the following:
* in the PH7 solution the Voltage = 361 and PH = 5.6
* in the PH4 solution the Voltage = 55 and PH = 13.94
* open circuit (no probe connected) give Voltage = 566 and PH = 0 => Actual voltage over ph_pin and ground is 2.7V as measured with multimeter.
* short circuit between the probe center pin and ground give Voltage = 401 and PH=4.42
1.) this seems to be the inverse of what I expected. Can you explain this to me?
2.) Can you explain to me the purpose of the following values in the DFRobot_PH.cpp file? => 2032.44; 1500;
Regards,
Jaco
I have a SEN0161V1 ph probe connected to a Arduino Nano. I use the code from https://github.com/DFRobot/DFRobot_PH with the combined EC & PH measurement example. I also used the code associated with the RS stock number. I rinse the probe in distilled water between measuring in the various solutions and the power is supplied via the PC USB & Nano 5V connection.
I have not been able to calibrate this sensor with PH7 & PH4 solution as the software advised that the PH's are out of range.
I get the following:
* in the PH7 solution the Voltage = 361 and PH = 5.6
* in the PH4 solution the Voltage = 55 and PH = 13.94
* open circuit (no probe connected) give Voltage = 566 and PH = 0 => Actual voltage over ph_pin and ground is 2.7V as measured with multimeter.
* short circuit between the probe center pin and ground give Voltage = 401 and PH=4.42
1.) this seems to be the inverse of what I expected. Can you explain this to me?
2.) Can you explain to me the purpose of the following values in the DFRobot_PH.cpp file? => 2032.44; 1500;
Regards,
Jaco
