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Calibration Factors
Converting Hz to
Degrees C
Example
VW Temperature Sensor, 2012/6/20
METHOD B - Three factors
The calibration record lists coefficients that are used in a polynomial
expression to linearize the Hz readings and convert them to engineering
units. The VW temperature sensor lists three factors, A, B, C which are
used to convert the Hz reading to degrees C.
Apply the calibration factors as shown in the equation below:
2
Temperature = (A x F
)+ (B x F) + C
Where:
Temperature is in Degrees C,
A, B, and C are factors on the sensor calibration record,
F is the Hz reading from the sensor.
The Hz reading is 2240.11. What is the temperature in degrees C?
Find the sensor calibration record and identify the three factors: A, B
1.
and C.
Apply the calibration factors to find the answer of 60 degrees C.
2.
Factor
Hz Reading
A
-5
3.66391 x 10
2240.11
B
-2
-1.55501 x 10
2240.11
C
2
-1.20283 x 10
Temperature in degrees C
Data Reduction
Value
2
183.8584
-34.8339
-120.283
28.74
6
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