The pressure we calculated were arrived at using polynomial constants derived from an Excel spreadsheet in our calibration department.
If these calculated values do not agree with the customers values then it is because they used some other method of calculating the polynomial factors. Please review your formulas to verify that follow the polynomial equations in the manual, which we have included below.
It should be noted that where changes of water levels are being monitored it makes little difference whether the linear coefficient or the polynomial expression is used.