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MIC612 Thermal Camera Operation of the Thermal Camera | en 57
Bosch Security Systems, Inc. Installation Manual F.01U.249.416 | 2.0 | 2012.09
8 Operation of the Thermal Camera
8.1 Switching Video
To switch Video Channel 2 between the optical (visible) camera and the thermal camera,
enter the Thermal Camera Setup menu of the OSD, select the option Second Channel Video,
and then toggle to the appropriate choice.
8.2 Flat-Field Correction (FFC)
The thermal camera uses an internal process called flat-field correction (FFC) to improve the
quality of the thermal video image displayed on the monitor. During this process, a shutter
rotates in front of the Focal Plane Array (FPA) to give a uniform temperature (a flat field) to
every detector element. During the process (which takes less than a second), the live thermal
video image is frozen, and persists, while the camera updates correction coefficients. After
the process completes, live video returns automatically. With a more uniform array output, the
quality of the image should improve.
About 2 seconds before an automatic FFC operation, the thermal camera displays a small
green square in the upper right of the video output. This square symbol is called the Flat Field
Imminent Symbol; it warns that FFC is about to begin.
Figure 8.1 Thermal image with Flat Field Imminent Symbol (green square)
Performing FFC often should prevent the thermal video image from appearing “grainy”. This is
especially important when the temperature of the camera is fluctuating, such as immediately
after the camera is powered on, or when ambient temperature is changing.
8.3 Displaying Thermal Camera Temperature
The thermal camera can display its internal temperature on the video output with a SPOT
meter (320 TVL models only).
1. In Bosch protocol, in the OSD, enter "Aux ON + 463 + ENTER." The message, "SPOT meter
Display: ON" should appear on-screen, and the SPOT meter should appear.
Note: entering "Aux OFF + 463 +ENTER" deactivates the SPOT meter.
2. Select the appropriate temperature scale. Enter "Aux ON + 463 + ENTER" again to toggle
the temperature scale as necessary. (The default scale is in Degrees F.)
NOTICE!
The selected settings should remain in internal memory; if you must turn off power to the
camera, the camera should retain the last meter display and the temperature scale (°F/°C);
those should appear after power on.