I am using load cell, [from here][1]. 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:

 - Getting same voltage value from +Signal and -Signal.

###Condition at my plate:
- 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

<pre><code>
        
    #include <MCP3551.h>
    #include <SPI.h>
    
    #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();
    }
</pre></code>

### Where is the fault. What factor / point i should consider to troubleshoot this up?Help.

  [1]: http://www.evelta.com/industrial-control/sensors/load-cell/czl-601-load-cell-80-kg