MSP430F2619: ADC12 ACCELEROMETER.

Hello. I have msp430f2619 and an accelerometer from which an analog signal comes to pins 6.0-6.3 respectively zyx and temperature. 
I'm new to programming microcontrollers, and I would like to understand what kind of numbers do I get with the code below? 
Even if the accelerometer is not moved, the incoming signal still ranges from 1050 to 1200 .. 
Help the beginner with advice, thanks in advance!

#include <msp430.h>
#define   Num_of_Results   8
volatile unsigned int A0results[Num_of_Results];  
volatile unsigned int A1results[Num_of_Results];  
volatile unsigned int A2results[Num_of_Results];  
volatile unsigned int A3results[Num_of_Results];  
int main(void)
{
  WDTCTL = WDTPW+WDTHOLD;                   // Stop watchdog timer
  P6SEL = 0x0F;                             // Enable A/D channel inputs
  ADC12CTL0 = ADC12ON+MSC+SHT0_8;           // Turn on ADC12, extend sampling time
                                            // to avoid overflow of results
  ADC12CTL1 = SHP+CONSEQ_3;                 // Use sampling timer, repeated sequence
  ADC12MCTL0 = INCH_0;                      // ref+=AVcc, channel = A0
  ADC12MCTL1 = INCH_1;                      // ref+=AVcc, channel = A1
  ADC12MCTL2 = INCH_2;                      // ref+=AVcc, channel = A2
  ADC12MCTL3 = INCH_3+EOS;                  // ref+=AVcc, channel = A3, end seq.
  ADC12IE = 0x08;                           // Enable ADC12IFG.3
  ADC12CTL0 |= ENC;                         // Enable conversions
  ADC12CTL0 |= ADC12SC;                     // Start convn - software trigger
  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0, Enable interrupts
}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=ADC12_VECTOR
__interrupt void ADC12ISR (void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(ADC12_VECTOR))) ADC12ISR (void)
#else
#error Compiler not supported!
#endif
{
  static unsigned int index = 0;
  A0results[index] = ADC12MEM0;             // Move A0 results, IFG is cleared
  A1results[index] = ADC12MEM1;             // Move A1 results, IFG is cleared
  A2results[index] = ADC12MEM2;             // Move A2 results, IFG is cleared
  A3results[index] = ADC12MEM3;             // Move A3 results, IFG is cleared
  index = (index+1)%Num_of_Results;         // Increment results index, modulo; Set Breakpoint1 here
  if (index == 0)
    __no_operation();                       // Set Breakpoint2 here
}