Unit installation

12-3

zero and more than that when above zero. So our first conversion point for temperature

says that it would have to be 460 degrees below zero to get 0 volts out of the sensor.

The second point we set specifies what real world quantity would cause the sensor to

output 5 volts (or 25 with the voltage divider turned on). If your wind speed detector

outputs 5 volts when the wind is blowing 150 MPH, this point would be 150. For the

temperature sensor we use (the LM335), it would have to be 440 degrees out to get 5 volts

out of the sensor.

"Calibration" refers to correcting for small errors in a reading. If your the controller tells you it is

85 degrees when it is 88, you can calibrate it to correct for the small error. If it is way off, you

probably have the conversion set wrong.

You can also set "analog alarms". These will cause a macro to be executed whenever the value

read on one of the analog lines goes above or below a preset value. See Commands 104..107 for

more information.

If you want to use an analog input to control a rotor, see Appendix E.