EC Sensor Doubt
Account cancelled 2022-02-18 11:29:09 1214 Views3 Replies I have started interfacing EC Sensor.
Also i took df robot github code reference to interface the sensor.
However there is one doubt code which is as follows :
#define RES2 820.0
#define ECREF 200.0
Does anyone knows from where the values RES2 and ECREF is derived from ??
Also i took df robot github code reference to interface the sensor.
However there is one doubt code which is as follows :
#define RES2 820.0
#define ECREF 200.0
Does anyone knows from where the values RES2 and ECREF is derived from ??
2022-05-09 19:42:05 giorasussmann
SEN0451 - is there any schematic for the temperature sensor part? If yes can you send link?
giorasussmann 2022-05-09 10:53:37 
Youyou
#define RES2 820.0
This is determined by hardware, one of the op-amp's feedback resistors is 820 ohms, so that's where the 820 number comes from.
Please see the schematic link below. R10 = 820 Ω
https://image.dfrobot.com/image/data/DFR0300/DFR0300_v1.0_schematic.pdf
#define ECREF 200.0
This is also determined by hardware. The amplitude of the high-frequency square wave signal emitted by the BNC port is 200mv.
Youyou YoannR
wrote:
2022-07-08 18:45:26 1 Replies
Hello, do you have by anychance schematics for EC Pro sensor and PT1000 Temperature sensor ? And maybe explanation for the definitions in libraries : #define GDIFF (30/1.8)#define VR0 0.223#define G0 2#define I (1.24 / 10000)
Thanks
