Unit installation

12-15

103: Calibrate an Analog Input

This command allows you to correct for small amounts of error in reading analog sources. It

should not be used until the resolution and conversion ratios are set (with Commands 101 and

102). It is not intended to fix readings that are way off (more that 20 percent or so). If you are

getting a reading that is a long way off, go back to Command 102 and correct the conversion ratio.

This command accepts as input the correct value for an analog input line and adds or subtracts the

right amount from the reading it is receiving to make it equal what you say it is. To get rid of this

correction factor, execute the reset calibration form of this command shown in the table below.

<103> b l n wwww Calibrate an analog input

<103> b l 2 Reset calibration

Parameters:

- 103 is the default command name.

- B is the I/O board number (1..2)

- L is the analog input line number (1..8)

- N is 1 for negative, 0 for positive for the following number

- WWWW is the actual value that should be read by the sensor.

Notes:

The value you enter will have as many assumed decimal places as you set with Command 101.