Sonel KT-640, User Manual

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USER MANUAL 11
4.2. Focus adjustment
Focus can be adjusted in manual or in auto mode. In manual mode aim the lens at the
target and then move the joystick up or down to zoom the focus point in or out. For very
precise focus setting it is recommended to use the "Zoom" function.
To adjust the focus automatically, use the (21) button. Press it and the camera will focus,
provided that the object, which the camera is being set to focus on, has a large thermal
contrast. In case the auto focus results are dissatisfying, use the manual focus mode.
4.3. Enlarging image
– Zoom (x2, x4, x8)
Moving the Joystick right allows to magnify thermal image 2-, 4-, up to 8 times bigger,
while moving the Joystick left makes the image zoom out down to its nominal size.
Zooming can be also performed by pressing the field with the magnification symbol and its
ratio on it. It is located on the bottom bar on the screen (see section 3.3).
Image magnification allows accurate focusing. It should be remembered that KT-640 sup-
ports digital zoom only, so it is not advisable to save IR thermal images digitally enlarged..
4.4. Temperature range
Temperature range can be adjusted by buttons or by the use of touch screen when the
camera is in the real time mode, and when a real time infrared image is being displayed
on screen.
Press (6) button or click on icon or on the temperature value on icon on the
touch screen, to switch from automatic temperature mode into manual mode. This transi-
tion will be indicated by the "M" letter replacing "A" letter on the screen (see section 3.3)
and the temperature, that can now be adjusted manually, will be highlighted by the blue
line framing the field in which it is located. Now you can change the upper limit of the tem-
perature range by moving Joystick up/down or by sliding touch pen across the tempera-
ture bar. Whili changing the temperature, its value is marked by yellow background. To
change the lower range press (6) button again.
Press and hold (6) button for 2 seconds, or click "M" letter on icon with touch pen,
to go back into automatic temperature range selection mode.
4.4.1. High temperatures filter.
Full temperature range of KT-640 is -20
°C do +800°C. It is divided into two filter ranges:
standard (filter 1 range: -
20°C do +250°C) and high (filter 2 range: +200°C do +800°C).
When the temperature of the measured object exceeds selected filter range, instead of
temperature values, the camera will display following symbols on screen: "+++" or "---".
Those symbols indicate manual filter range adjustment.
To change the filter range go to real time image and press button for 3 seconds.