MoTeC ACL VIM - Manual (Page 26)

22 Operation
To connect a thermocouple to an ADL2 a MoTeC thermocouple
amplifier may be used. The amplifier measures the very weak signal
from the thermocouple and amplifies it so that it is suitable for
connection to an Analogue Voltage (or Analogue Temperature) input on
the ADL2.
Note Sensor amplifiers normal require power to be supplied to them,
often a regulated 5 volt or 8 volt supply. This means that they cannot be
simply connected to the vehicle battery voltage. The various MoTeC
measurement devices usually have a number of 5V and 8V sensor
supply pins for this purpose.
Amplified Sensors
Some sensors have an internal amplifier to convert the signal from the
internal sensing element to a voltage suitable to connect to an
Analogue Voltage input or in some cases to a Digital input. Many
pressure sensors and crank trigger sensors work this way.
These sensors normally require power to be supplied to them as
described for Sensor Amplifiers above.
Input Basics
Calibration
Calibration is the process of converting the electrical value, for example
voltage, into a number that represents the physical value, for example
temperature.
The calibrations can be selected from a number of predefined calibrations
provided by MoTeC, or they can be entered by the user.
Read Value Feature
Note To use the Read Value feature in ACL manager, a channel must
already be assigned to that pin and sent to the device (unlike the same
feature in ADL2 / SDL).
Range
Each input will have a range over which it will work. For example some
analogue voltage inputs will work over a range of 0 to 5 volts and others may
work over a range of 0 to 15 volts. Similarly digital frequency inputs will only
work over a certain range of frequencies.