Codes for LEM current sensor

Hi all, I am currently doing a project on the codes for the LEM LTS15-NP current sensor. I have gotten most of the codes running but I have problems with the accuracy, I have already changed the values but it is not accurate. Can someone help me with this?
/***
----------------------------- |

Analog Value Current reading
0.49-0.52
1.01-1.10
------------------------------

**/

long day = 86400000; // 86400000 milliseconds in a day
long hour = 3600000; // 3600000 milliseconds in an hour
long minute = 60000; // 60000 milliseconds in a minute
long second = 1000; // 1000 milliseconds in a second
float readVoltage = 0;

double totalamps, ampSec, ampHour;

// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
ampSec = 0.0;
ampHour = 0.0;
Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
long timeNow = millis(); // start grabbing the time
int seconds = (((timeNow % day) % hour) % minute) / second;
int minutes = ((timeNow % day) % hour) / minute ;
int hours = (timeNow % day) / hour;
int days = timeNow / day ;
int b;

float curSen = readcellvoltage(A0); // current sensor reading, LEM connected to A0
float cell = readcellvoltage(15); // cell voltage reading, Lifepo4 cell connected to A1
// Calibration as per multimeter values
float offSet = 0.06;
cell = cell - 0.22;
curSen = curSen + offSet;
float readcellcurrent(A2);

// calibration as per clampmeter current values
float amps = curSen * 28; // calibration may vary as per your conditions

totalamps += amps;
ampSec = totalamps;
ampHour = totalamps / 3600;

Serial.print(“Cur.Sen: “);
Serial.print(curSen);
Serial.print(”\t”);
Serial.print(“Amps drawn: “);
Serial.print(amps);
Serial.print(”\t”);
Serial.print(“Cell voltage: “);
Serial.print(cell);
Serial.print(”\t”);
Serial.print(“Amp-Sec: “);
Serial.print(ampSec, 4);
Serial.print(”\t”);
Serial.print(“Amp-Hour: “);
Serial.print(ampHour, 6);
Serial.print(”\t”);
Serial.print(minutes);
Serial.print(":");
Serial.print(seconds);
Serial.println();

delay(1000);
}
float readcellvoltage(int a)
{
readVoltage = analogRead(a);
float val = (readVoltage * 5 ) / 1023; // 0-1023 TO 0-5v
return val;
}
float readcellcurrent(int b)
{
float readCurrent = analogRead(A2);
float val = ((readVoltage -2.5)/0.0625)*15;
return val;
}