Installation and Operation
© 2010 Microchip Technology Inc. DS51889A-page 15
2.3.3 Sensor Calibration and Setup
2.3.3.1 THERMOCOUPLE CALIBRATION
The Thermocouple sensor can be calibrated using the GUI. Once the Thermocouple
sensor is exposed to the desired calibration temperature, simply type in the
temperature in the Calibration Temperature field and click the Calibrate button. When
the temperature is calibrated and the calibration offset is stored in the PIC
Microcontroller EEPROM, the calibration offset is displayed in the RTD Calibration
Offset text box. The Reset button resets the calibration offset to 0.
FIGURE 2-5: Sensor Calibration.
2.3.3.2 MCP9804 SETUP
The MCP9804 is a silicon temperature sensor which measures temperature with
±0.25°C nominal and ±1°C maximum accuracy from -40°C to +125°C. This sensor has
multiple user programmable features such as Alert Output limits, output hysteresis and
mode. The output mode can be set up as comparator or interrupt output with an active
high or active low levels. The temperature measurement resolution can also be set up.
.
FIGURE 2-6: MCP9804 Setup.
