SCHOTT KL 1500 LCD Conseils D'utilisation page 17

2.3.1 Electronic adjustment
The brightness can be adjusted steples-
sly by turning the light intensity setting
knob (3).
There are four distinct notched positi-
ons between the two end positions of
the adjusting knob. These fixed positi-
ons thus ensure the reproducibility of
pre-selected brightness settings.
Position 1 gives the lowest light inten-
sity, and maximum brightness is attai-
ned in position 6. The two barriers at
positions 4 and 5 are bypassed by
pressing in the adjustment knob.
The adjustment knob cannot be turned
beyond the end stops 1 and 6 respec-
tively.
The lamp lifetime in position 4 is about
1500 hours and in position 5 it is
about 150 hours.
In position 6 the halogen lamp is ope-
rated at its nominal voltage and the
lamp will achieve approximately the
rated lifetime stated by the lamp
manufacturer (depends upon the type).
The approximate color temperature
of the light emitted by the halogen
lamp (17) is indicated on the LCD
display (5). The color temperature of
the light can be set by turning the
light intensity adjustment (3) (step
width 50 K).
After bypassing the barrier at position
5, a lamp symbol (19) appears in the
LCD display and flashes for the first
few seconds. This acts as a maximum
light indication and gives a warning
that the expected lamp lifetime will be
reduced compared to position 5.
2.3.2 Mechanical aperture
The light intensity can be altered
steplessly while retaining the color
temperature by turning the adjustment
knob of the mechanical aperture (4).
Two fixed end-stops and three additio-
nal retention points (marked with the
letters A to E) enable defined aperture
settings to be selected reproducibly.
Position A gives the lowest brightness,
and maximum brightness is achieved
in position E (aperture completely
open). Turning the adjustment knob
from one retention point to the next
approximately doubles or halves the
light intensity respectively each time.
The adjustment knob cannot be turned
beyond the end-stops A and E respec-
tively.
GB
16