EVB90640/1
User manual
Rev. 2
Page 2 of 7
2.
Operation
Now start the EVB program. The program will scan for the EVB and you should see a screen as below:
The EVB has been recognized and a sensor has been found on the PCB. The I2C address of the sensor is shown
and its factory ID.
The sensor is powered when the EVB starts. If needed, one can turn off the supply voltage by pressing the Vdd
button
.
Now, click on the + in front of the Measure tab.
Here one can control by clicking on the item:
•
The external bilinear interpolation of the thermal image (x1, x2 or x4);
•
The (sub-)frame rate of the sensor: 0.5Hz, 1Hz, 2Hz, 4Hz … 64Hz. Initially, the software reads the frame
rate as set in the EEPROM of the sensor. The factory default is 2Hz;
•
The emissivity of the object, to be entered by the user. Standard setting E=1;
•
Enable or disable the external de-interlace filter for the MLX90640;
•
Enable and configure the external IIR small signal filter. There is a value for the depth of the filter (a
higher value reduces noise) and a threshold value, which controls at which object temperature jump the
filter is reset;
•
Enable or disable the thermal gradient compensation (TGC) filter and filter depth (minimal 8) (not
advised for MLX90640);
