Principle of calibration

1.       Sensors with one output are calibrated to its value at one point with a potentiometer

2.   Sensors with calculated outputs are calibrated via RS 232

2.1   Sensors with RS 232 = via RS 232

2.2   Sensors with Palm = via Palm

2.3   Analog sensors = via an extra cable RS 232

Low point always has to be the lowest possible

High point does not need to be the highest – it can be lower

XML format lettering

First identifying letter is C for calibration

Second letter is                         R for roughness

Second letter is                         P for polarization

Second letter is                         O for rotation

Second letter is                         I   for refractive index

Third letter Low calibration value L = for calibration low point

Third letter High calibration value             H = for calibration high point

Definition

Measured value for low calibration point   =           X = reflected / scattered or left / right

Measured value for high calibration point =           Y = reflected / scattered or left / right

Measured value at any point                    =         Z = reflected / scattered or left / right

Formula for calibration                Result = L + ( H – L ) ( Y – X ) / ( Y - Z )

Data format

Command 19 200 bd, 8 data bits, parity none, stop bit 1, flow control Xon / Xoff

Enter the following text to call the sensor

<device>

   <name>sensor</name>

   <manufacturer>ia</manufacturer>

   <model>XXX</model>    digit a 3 digit no from the sensor

   <serial>123456>/serial>  digit a 6 digit serial no

   <read>call</read>           digit a 3+ 3 digit no. see table

</device>

Roughness measurement in micron = 1000 = 100 micron

1.       Calibrate to low value  = CRL123   = store L and X in CRL  and no response

2.       Calibrate to high value = CRH123  = store H and Y in CRH and no response

3.       Measure roughness = L123 + ( H123 – L123 ) ( Y123 – X123 ) / ( Y123 – Z123 )

Rotation measurement in degree = + / - 100 degree

4.       Calibrate to low value  = COL123   = store L and X in COL and no response

5.       Calibrate to high value = COH123  = store H and Y in COH and no response

Measure rotation = L123 + ( H123 – L123 ) ( Y123 – X123 ) / ( Y123 – Z123 )

Polarization measurement in index %  = 1000 = 100 %

6.       Calibrate to low value  = CPL123   = store L and X in CPL and no response

7.       Calibrate to high value = CPH123  = store H and Y in CPH and no response

Measure polarization = L123 + ( H123 – L123 ) ( Y123 – X123 ) / ( Y123 – Z123 )

Refractive index measurement in refractive index = 1.33 = 1330

8.       Calibrate to low value  = CIL123   = store L and X in CIL and no response

9.       Calibrate to high value = CIH123  = store H and Y in CIH and no response

Measure refractive index = L123 + ( H123 – L123 ) ( Y123 – X123 ) / ( Y123 – Z123 )

Counter - encoder

000000   = set counter to zero