UV-260
– USER MANUAL
21
7.2.2. Image Settings
Fig. 19. Menu – Image Settings.
"Image Settings" menu allows you to configure the mode effects of UV image display. Specific
options are presented below. Select/change options in the same way as in the main menu (use
"arrow" key and confirm by pressing
, exit to the previous menu by
; or touch selected area
of the screen).
Image mode
: function analogous to pressing button
, select between Visible image, UV
image and Mixed image.
UV Image color:
select colour for displaying UV discharges (available colours: red, white and
blue).
Photon counting interval
: Set the interval time for photon counting, There are 10 time
intervals of 1s, 2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s, 10s.
Integral duration
- integration time length: Set the integration duration, which can be set to 1,
2, 4, 8, 16 and 32. The integration function is used to accumulate the UV signal to filter out the
random interference. Within the selected integration time, the discharge point appears repeatedly
in the same place and is accumulated into larger signal, while the random interference signal will
not be accumulated into a large signal, when the gain is reduced, the random interference will be
filtered.
Gain
: adjust the sensitivity of UV detector (similarly as adjustment - use buttons
and
in UV image mode UV or mixed mode UV+ ).
Note.
Setting the high gain allows you to receive weak UV signals and detect very small
discharges, but it should be remembered that:
- large gain may affect the accuracy of locating discharges, as the UV image will cover large
area of the visible image making difficult to determine the exact location.
- in addition to the actual discharge signal, also interfering signals will be gained and they
usually appear in random places (not in the same location). Therefore, in the first phase of
discharge detection it is recommended to set a high gain level to preliminary determine the
discharge location, and then gradually reduce the gain to a level that will allow precise location of
discharges.
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