Forum >Replies by delonatchou
Replies （20）
- Topic: SEN0161 PH MeterYou Reply: OK thanks
I will develop arduino code with this, When It will be stable, I go back on the forum to put the code !
see you later
Denis - Topic: SEN0161 PH MeterYou Reply: OK thanks
I will develop arduino code with this, When It will be stable, I go back on the forum to put the code !
see you later
Denis - Topic: SEN0161 PH MeterYou Reply: OK thanks
I will develop arduino code with this, When It will be stable, I go back on the forum to put the code !
see you later
Denis - Topic: SEN0161 PH MeterYou Reply: OK thanks
I will develop arduino code with this, When It will be stable, I go back on the forum to put the code !
see you later
Denis - Topic: SEN0161 PH MeterYou Reply: OK thanks
I will develop arduino code with this, When It will be stable, I go back on the forum to put the code !
see you later
Denis - Topic: SEN0161 PH MeterYou Reply: Hi,
Ok I unterstand.
Can you explain the conversion made with electronic board ?
is it simple scale conversion (-5/+5 V) to (0/5 V) ==> scale 0.5 or it's different; how the potentiometer runs ? how many turns are possible on it ?
thanks for your answers;
Denis - Topic: SEN0161 PH MeterYou Reply: Hi,
Ok I unterstand.
Can you explain the conversion made with electronic board ?
is it simple scale conversion (-5/+5 V) to (0/5 V) ==> scale 0.5 or it's different; how the potentiometer runs ? how many turns are possible on it ?
thanks for your answers;
Denis - Topic: SEN0161 PH MeterYou Reply: Hi,
Ok I unterstand.
Can you explain the conversion made with electronic board ?
is it simple scale conversion (-5/+5 V) to (0/5 V) ==> scale 0.5 or it's different; how the potentiometer runs ? how many turns are possible on it ?
thanks for your answers;
Denis - Topic: SEN0161 PH MeterYou Reply: Hi,
Ok I unterstand.
Can you explain the conversion made with electronic board ?
is it simple scale conversion (-5/+5 V) to (0/5 V) ==> scale 0.5 or it's different; how the potentiometer runs ? how many turns are possible on it ?
thanks for your answers;
Denis - Topic: SEN0161 PH MeterYou Reply: Hi,
Ok I unterstand.
Can you explain the conversion made with electronic board ?
is it simple scale conversion (-5/+5 V) to (0/5 V) ==> scale 0.5 or it's different; how the potentiometer runs ? how many turns are possible on it ?
thanks for your answers;
Denis - Topic: SEN0161 PH MeterYou Reply: Hi Leff,
sorry for my poor english !
reading is stable.
I put the probe in pH4 and read 390 mV; in pH6.8 I read 1740 mV ...
when I switch, It's stable.
But it's very different as write in wiki : http://dfrobot.com/wiki/index.php/PH_meter(SKU:_SEN0161)
So I think it's a calibration problem, but when I turn potentiometer (several round in each turn) there is quite no difference in output voltage.
Is the a problem with electronic card ? Is it a power supply problem ?
To resume it's OK for me with the system, but with relationship between output voltage and pH very different with the wiki.
The output seems to go from -5V to +5V; it's problematic with Arduino anlogic converter, which go from 0 to 3.3V; but I can insert some electronic to correct this problem
Please help me !!
Denis - Topic: SEN0161 PH MeterYou Reply: Hi Leff,
sorry for my poor english !
reading is stable.
I put the probe in pH4 and read 390 mV; in pH6.8 I read 1740 mV ...
when I switch, It's stable.
But it's very different as write in wiki : http://dfrobot.com/wiki/index.php/PH_meter(SKU:_SEN0161)
So I think it's a calibration problem, but when I turn potentiometer (several round in each turn) there is quite no difference in output voltage.
Is the a problem with electronic card ? Is it a power supply problem ?
To resume it's OK for me with the system, but with relationship between output voltage and pH very different with the wiki.
The output seems to go from -5V to +5V; it's problematic with Arduino anlogic converter, which go from 0 to 3.3V; but I can insert some electronic to correct this problem
Please help me !!
Denis - Topic: SEN0161 PH MeterYou Reply: Hi Leff,
sorry for my poor english !
reading is stable.
I put the probe in pH4 and read 390 mV; in pH6.8 I read 1740 mV ...
when I switch, It's stable.
But it's very different as write in wiki : http://dfrobot.com/wiki/index.php/PH_meter(SKU:_SEN0161)
So I think it's a calibration problem, but when I turn potentiometer (several round in each turn) there is quite no difference in output voltage.
Is the a problem with electronic card ? Is it a power supply problem ?
To resume it's OK for me with the system, but with relationship between output voltage and pH very different with the wiki.
The output seems to go from -5V to +5V; it's problematic with Arduino anlogic converter, which go from 0 to 3.3V; but I can insert some electronic to correct this problem
Please help me !!
Denis - Topic: SEN0161 PH MeterYou Reply: Hi Leff,
sorry for my poor english !
reading is stable.
I put the probe in pH4 and read 390 mV; in pH6.8 I read 1740 mV ...
when I switch, It's stable.
But it's very different as write in wiki : http://dfrobot.com/wiki/index.php/PH_meter(SKU:_SEN0161)
So I think it's a calibration problem, but when I turn potentiometer (several round in each turn) there is quite no difference in output voltage.
Is the a problem with electronic card ? Is it a power supply problem ?
To resume it's OK for me with the system, but with relationship between output voltage and pH very different with the wiki.
The output seems to go from -5V to +5V; it's problematic with Arduino anlogic converter, which go from 0 to 3.3V; but I can insert some electronic to correct this problem
Please help me !!
Denis - Topic: SEN0161 PH MeterYou Reply: Hi Leff,
sorry for my poor english !
reading is stable.
I put the probe in pH4 and read 390 mV; in pH6.8 I read 1740 mV ...
when I switch, It's stable.
But it's very different as write in wiki : http://dfrobot.com/wiki/index.php/PH_meter(SKU:_SEN0161)
So I think it's a calibration problem, but when I turn potentiometer (several round in each turn) there is quite no difference in output voltage.
Is the a problem with electronic card ? Is it a power supply problem ?
To resume it's OK for me with the system, but with relationship between output voltage and pH very different with the wiki.
The output seems to go from -5V to +5V; it's problematic with Arduino anlogic converter, which go from 0 to 3.3V; but I can insert some electronic to correct this problem
Please help me !!
Denis - Topic: SEN0161 PH MeterYou Reply: I've just bought a phmeter SEN0161.
I obtain this value in output :
voltage (mV) pH
-470 2,3
390 4
1740 6,8
3950 12,5
with some solution, verification made with another phmeter.
Action on potentiometer quite made nothing...
So I write another script for the arduino (ESP8266-12E).
Fot this one analog input goses from 0 to 3100 mV for pH from 3,2 to 10.
Please tell if it's normal, which solution to obtain theorical result as in script give with the kit ?
Denis - Topic: SEN0161 PH MeterYou Reply: I've just bought a phmeter SEN0161.
I obtain this value in output :
voltage (mV) pH
-470 2,3
390 4
1740 6,8
3950 12,5
with some solution, verification made with another phmeter.
Action on potentiometer quite made nothing...
So I write another script for the arduino (ESP8266-12E).
Fot this one analog input goses from 0 to 3100 mV for pH from 3,2 to 10.
Please tell if it's normal, which solution to obtain theorical result as in script give with the kit ?
Denis - Topic: SEN0161 PH MeterYou Reply: I've just bought a phmeter SEN0161.
I obtain this value in output :
voltage (mV) pH
-470 2,3
390 4
1740 6,8
3950 12,5
with some solution, verification made with another phmeter.
Action on potentiometer quite made nothing...
So I write another script for the arduino (ESP8266-12E).
Fot this one analog input goses from 0 to 3100 mV for pH from 3,2 to 10.
Please tell if it's normal, which solution to obtain theorical result as in script give with the kit ?
Denis - Topic: SEN0161 PH MeterYou Reply: I've just bought a phmeter SEN0161.
I obtain this value in output :
voltage (mV) pH
-470 2,3
390 4
1740 6,8
3950 12,5
with some solution, verification made with another phmeter.
Action on potentiometer quite made nothing...
So I write another script for the arduino (ESP8266-12E).
Fot this one analog input goses from 0 to 3100 mV for pH from 3,2 to 10.
Please tell if it's normal, which solution to obtain theorical result as in script give with the kit ?
Denis - Topic: SEN0161 PH MeterYou Reply: I've just bought a phmeter SEN0161.
I obtain this value in output :
voltage (mV) pH
-470 2,3
390 4
1740 6,8
3950 12,5
with some solution, verification made with another phmeter.
Action on potentiometer quite made nothing...
So I write another script for the arduino (ESP8266-12E).
Fot this one analog input goses from 0 to 3100 mV for pH from 3,2 to 10.
Please tell if it's normal, which solution to obtain theorical result as in script give with the kit ?
Denis