/* our eqiupment DAC, by experiment, y = a + bx where y is volts */
const static double a[] = {
  4.97831,
  -0.0207601
};
const static double aSigma[] = {
  0.000145044,
  0.0001258
};
const static double b[] = {
  0.00244137,
  0.00488303
};
const static double bSigma[] = {
  0.000000133962,
  0.000000182228
};
const static double rChiSq[] = {
  0.391955,
  0.317828
};