Generac Power Systems H-100 Technical Manual page 41

Where:
M is the calibration factor
A, B, C are polynomial coefficients
S is the scaling factor
Calibration = M * 1024
Coefficient 3 = C
Coefficient 2 = B * 1024
Coefficient 1 = A
Scaling = S * 1024
POLY_1ST_N2:
First order polynomial with 4 coefficients and a scal-
ing factor
X = raw_analog
(A + BX + CX-1 + DX-2) * S
Where:
A, B, C, D are polynomial coefficients
S is the scaling factor
Coefficient 3 = D
Coefficient 2 = C
Coefficient 1 = B * 1024
Calibration = A
Scaling = S * 1024
CFM_SENSOR:
First order polynomial with 4 coefficients and a scal-
ing factor
X = raw_analog - learned_offset
(A + BX + CX-1 + DX-2) * S
Where:
A, B, C, D are polynomial coefficients
S is the scaling factor
Coefficient 3 = D/32
Coefficient 2 = C
Coefficient 1 = B * 32768
Calibration = A * 64
Scaling = S * 1024
H-100 Control Panel Technical Manual
CURRENT:
CAL_SCALE:
Implements a scaling factor and a calibration factor
X = M * raw_analog
X * S
Where:
M is the calibration factor
S is the scaling factor
Calibration = M * 1024
Scaling = S * 1024
GEN_FP_POLY:
Third order polynomial with 4 coefficients
X = raw_analog
AX3 + BX2 + CX + D
Where:
A, B, C, D are 16 bit floating point polynomial
coefficients
Coefficient 3 = A
Coefficient 2 = B
Coefficient 1 = C
Calibration = D
Amplitudes from 0.00000005961 (256 E-16) to
1,098,437,885,952 (1023 E+15) are possible with
this representation with at least 9 significant bits.
Appendix A
39