marcel aubert MA 1100 Mode D'emploi page 19

The device may only be operated using the power supply voltage indicated. The specified power
supply voltage can be found on the identification label at the bottom of the device. Only connect
the unit to grounded sockets.
Keep air vents free!
Do not operate the device with open cover (1)!
The device has not been approved for operation in potentially explosive atmospheres!
Switch the device ON or OFF
 Operate the rotary knob (5).
 Position 0: Device is switched OFF.
 Position 1: Device is switched ON.
Adjust brightness (electrically)
 Turn the brightness knob (5).
 Turning the brightness knob clockwise continuously increases the lamp voltage and the brightness.
Turning it counter clockwise reduces the brightness. Only adjust as much brightness as required be-
cause the useful life of the bulb decreases with increasing brightness.
Adjusting brightness with mechanical aperture
If you want to change the brightness without changing the color temperature, you should operate the me-
chanical hole matrix aperture. Turning the knob (6) clockwise increases the brightness up to the maximum.
Turning it counter clockwise reduces the brightness up to approx. 1% of the maximum setting. These set-
tings do not affect the life of the bulb. Of course, it is possible to operate the electrical brightness control,
although the color temperature changes again. If both brightness controls are used, it results in a control
range of 100% to approx. 0.1%.
Replacing the slide-in filter
 Remove the slide-in filter mount (12) from the slide-in filter guide (11).
 Slide the desired filter with mount into the slide-in filter guide until it engages.
Color and fluorescence filters can be used here for specific applications.
Use only original filters; otherwise, a thermal destruction of the filter and the device can-
not be ruled. Note that the filter and the entire holder may become very hot during opera-
tion. Let the device cool down sufficiently before removing the filter!
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OPERATION
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