Use Instructions

Power on/off
Press and hold the on/off button (3) (approx. 1.5 seconds) to switch on the device. Press and hold the on/off button (3) to switch off the device again.
Note: The on/off button (3) must be pressed until the OFF symbol appears on the display. Only then can the on/off button (3) be released and the device
switches off. If the on/off button (3) is released before the OFF symbol is displayed, the device does not switch off but switches to standby mode.
Standby mode
Briefly press the on/off button (3) to switch the device to standby mode. Briefly press the on/off button (3) again to switch the device back to observation
mode.
To further conserve battery power and extend running time, the ZEISS DTC 3 offers Smart Standby with a built-in motion sensor. This automatically detects the
position of the thermal imaging attachment and activates standby mode at 45° lateral inclination or 70° downward or upward inclination. As soon as the
thermal imaging attachment returns to its normal position, the device automatically switches back to observation mode. You can deactivate this function in the
menu under "Smart Standby".
Calibration
The device can be calibrated automatically (Auto Calibration = On) or manually (Auto Calibration = Off). This can be set in the main menu or via the right arrow
button (4) in observation mode.
In automatic mode, the device automatically performs a calibration by closing and opening an internal shutter when necessary. A gentle click should be heard.
In this mode, you also have the option of performing the calibration manually. Briefly
press the right arrow button (4). The device activates the shutter and calibrates itself. The device is now calibrated again.
To perform a manual, silent calibration, first switch to observation mode by pressing and holding the right arrow button (4) in manual mode. To calibrate,
cover the lens and then briefly press the right arrow button (4).
Note: Always cover the lens when performing a manual calibration. Otherwise the sensor cannot calibrate correctly and the image will deteriorate, e.g. ghost
images. If you forget to cover the lens during a manual calibration, repeat the calibration procedure with the lens covered.
Observation mode
Turn the focusing turret (2) to bring the scene into focus.
Color modes
The scene can be displayed in four different color modes. Briefly press the menu button (5) to change the observation mode. When changed, the selected
mode is shown on the display as text for about 2 seconds. The following color modes can be selected:
 White Hot: Cold areas are displayed here in black and warm areas in white.
 Black Hot: Cold areas are displayed here in white and warm areas in black.
 Red Hot: Cold areas are displayed here in black and warm areas in white. In addition, the warmest areas are shown in
yellow to red.
 Rainbow: A varied color palette displays cold areas in black to blue and warm areas in yellow to white.