Problems about pH sensor and DO sensor
wzhihan420 2019-01-12 03:26:54 5096 Views5 Replies Hi, I bought a set of sensor and MCU Board recently.
Here are two problems I need help.
1. SKU: SEN0161, Gravity: Analog pH Sensor / Meter Kit For Arduino
I'm using the sample code from the wiki.
When I put the probe into pH=7 standard solution during the calibration, the initial reading is more than 8, around 8.2, which means the offset setting need to be -1.2. Is that normal? And due to this large offset, the action of putting the probe into pH=4 solution and adjust the gain potential device cannot calibrate the sensor well.
Is there something wrong with the probe? Should I change a new probe?
2. SKU: SEN0237-A, Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino
Same, using the sample code from the wiki.
After uploading the code and fill the solution, whatever what kind of solution I put the probe in, the readings are always 0.00mg/L or -0.00mg/L. Since I have another meter can connect with BNC, there is a reading.
So, I don't know if there is something wrong with the code or the ADC board is not good.
Thanks, and please respond ASAP.
Here are two problems I need help.
1. SKU: SEN0161, Gravity: Analog pH Sensor / Meter Kit For Arduino
I'm using the sample code from the wiki.
When I put the probe into pH=7 standard solution during the calibration, the initial reading is more than 8, around 8.2, which means the offset setting need to be -1.2. Is that normal? And due to this large offset, the action of putting the probe into pH=4 solution and adjust the gain potential device cannot calibrate the sensor well.
Is there something wrong with the probe? Should I change a new probe?
2. SKU: SEN0237-A, Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino
Same, using the sample code from the wiki.
After uploading the code and fill the solution, whatever what kind of solution I put the probe in, the readings are always 0.00mg/L or -0.00mg/L. Since I have another meter can connect with BNC, there is a reading.
So, I don't know if there is something wrong with the code or the ADC board is not good.
Thanks, and please respond ASAP.
2021-09-27 12:36:12 Hallo everyone. I have a problem with my ph sensor SEN0169. Anyone could help me?
The problem is when I put the probe into the dark water reservoir and have a water flowing continuously, the sensor couldnt get the number of PH. But when I pull out the probe and put in again the probe to another bucket, it could get the number of PH. Where is the mistake?
Thank you vitalokaf
The problem is when I put the probe into the dark water reservoir and have a water flowing continuously, the sensor couldnt get the number of PH. But when I pull out the probe and put in again the probe to another bucket, it could get the number of PH. Where is the mistake?
Thank you
vitalokaf 2019-04-01 13:29:04 Hello wzhihan 420. How did you manage to connect your DO sensor to MCU ? If you have a schematic diagram, please spare me . Thank you and best regards. delacerna.derkwin
delacerna.derkwin 2019-01-21 11:39:01 That means the module is good, The probe might be faulty, please contact the sales for changing the probe. robert.chen
robert.chen 2019-01-19 01:27:44 Thanks for replying, the pH sensor is V1, and when I short the BNC connector of ADC, the output is Voltage is 2 and pH is 7.00. wzhihan420
wzhihan420 2019-01-15 11:19:16 Did you use SEN0161 V1 or V2? what if you just short the BNC connector of the ADC and is the output be 7? robert.chen
robert.chen 