I am using load cell, from here. Load cell specification are mentioned on the site. 5 wire coming out, its a 4 wire core shielded load cell.
###What screwing thing I am facing is:can't get the same voltage value from +Signal and -Signal.
- Getting same voltage value from +Signal and -Signal.
###Condition at my plate###What I am using:
- Using arduino nano runs on 5 V.
- Supplied excitation voltage : 4.78 V ~(From USB).
- Have not grounded Shield wire.(floating)(required to ground?).
- Using AD622 ina, connected REF voltage = VCC.
- Using MCP3551 ADC, connected -Vin Voltage = GND.
###After checking from multimeter:
- (+ and - signal) from Load cell: reading: 2.45v. both giving the same with respect to ground.
- Ad622 6th pin, OUT pin, gives me 4.08v at 60-70 ohms. (using potentiometer).
- This OUT pin is attached to MCP3551 2nd Pin, .i.e +Vin.
- Readings are coming from MCP3551 are noise data i guess, in bytecode What else I can do to detect the fault.
- Below is code sketch
#include
#include
#define SS 10
float fRawData;
MCP3551 MCP_ADC(SS);
void setup(){
pinMode( SS, OUTPUT );
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
Serial.println("Setup done.");
}
float getRawData(){
double fVar = 0;
int i = 0;
bool isReady = MCP_ADC.getCode();
if( isReady ){
Serial.print("Raw data:");
Serial.print(MCP_ADC.byteCode, DEC);
Serial.println();
}
}
void loop(){
getRawData();
}
Where is the fault. What factor / point I should consider to troubleshoot this up? Help.
simulate this circuit – Schematic created using CircuitLab
Please check the schematic. Please ask me, if something is not clear in the picture.
