MoTeC E816 - Manual (Page 5)

MoTeC Inputs 3
Inputs
E888 Thermocouple Inputs (TC1 – TC8)
The E888 has eight calibrated and compensated type K (-200 to 1250ºC)
thermocouple inputs. Thermocouple inputs are calibrated during production.
Note that the thermocouples numbered TC1 – TC8 correspond to pins AV9 –
AV16 in the Dash Manager Input pins setup.
Cold Junction compensations are performed using external sensors or the
E888 internal temperature sensor, according to the following rules:
• If only one of the two external cold junction compensation sensors (CJC1
or CJC2) is present then that sensor is used for compensations on all
thermocouple inputs.
• If both of the two external cold junction compensation sensors are present
then sensor CJC1 is used for compensations on TC1 to TC4, and sensor
CJC2 is used for compensations on TC5 to TC8.
• If neither of the two external cold junction compensation sensors are
present then the internal temperature sensor is used for compensations on
all thermocouple inputs.
Cold Junction Compensation Inputs (CJC1 and
CJC2)
The cold junction compensation inputs are used to measure thermistor (2 wire
temperature sensor) temperatures for thermocouple input compensation. If the
thermocouple inputs are not in use, or when using the E816, these inputs may
be used as general purpose temperature inputs.
CJC1/2 inputs have internal 1K pull-ups, and are calibrated to use Bosch 0 280
130 023/026 sensors to read from -30ºC to 150ºC.
Analog Voltage Inputs (AV1 – AV8 or AV1 – AV16)
The E888 has eight 0-5V analog voltage inputs (AV1 to AV8), while the E816
has sixteen inputs (AV1 to AV16). These are suitable for Potentiometers,
voltage output sensors and variable resistance (temperature) sensors (these
require an external pull-up resistor to 5V).