MoTeC ADL2 EDL2 - Manual (Page 17)

MoTeC Overview 15
Sensors convert a physical measurement (e.g. Pressure) into an electrical
signal (e.g. Volts). Different types of sensors generate different types of
electrical signals. For example most temperature sensors convert the
temperature into a variable resistance signal which may be measured by the
ADL2 Temperature inputs, however most wheel speed sensors generate a
variable frequency signal which must be connected to either a Digital input or
a Speed input.
Calibration
Calibration is the process of converting the electrical value, e.g. Volts into a
number that represents the physical value, e.g. Temperature.
All inputs can be calibrated to suit the connected sensor.
The calibrations can be selected from a number of predefined calibrations
provided by MoTeC, or they can be entered by the user.
Analog Voltage Inputs
The 20 Analog Voltage inputs are normally used to measure the signals from
analog voltage type sensors, i.e. sensors with variable voltage outputs, such
as:
• Rotary or linear potentiometers
• Signal conditioned 3 wire pressure sensors
• Thermocouple
amplifiers
• Accelerometers
These inputs can also be used to measure two wire variable resistance
sensors if an external pullup resistor is connected from the input to the 5V
sensor supply. Additionally, on/off switch signals may be connected, which
may also require an external pullup resistor.
Options
Note that the number of inputs that are available depends on which options
are enabled. See Appendix B: Options Summary for details.
Measurement Methods
These inputs can be configured to use several measurement methods to suit
the various types of sensors: