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6.7 Dimmer / Shutter / Strobe
Smooth 0 - 100 % dimming is provided by the combined mechanical dimmer / shutter unit. This unit may also be
used for strobe-effects (1 - 10 flashes per second)
6.8 Fan
The MH - 660 is cooled by two axial fans - one each in the projector head and one in the base. The speed of the
fan (and of course the noise) can be continuously reduced if very quiet performance is required.
By the Control Board using the "FAnS" function you can choose 3 types of low fan speed operating :
1. "reG" - continuous controlling of the fan speed
The fan automatically raises its speed in order to control inside temperature of the lighting, if the temperature
inside increases about certain level (the low fan speed reduces the cooling of the lighting). This cycle can repeat
several times until the temperature inside is on suitable level.
2. "Lo.HI"- low/high speed of the fan operating
The fan keeps the adjusted low speed until the temperature exceeds max. inside temp. of the fixture, then the
MH - 660 automatically switches from low to high the fan speed.
3. "Lo.OF" - low speed / Switch off the lamp
The fan keeps the adjusted low speed until the temperature exceeds max. inside temp. then the MH - 660
automatically switches off the lamp.
7. Control Board
The Control Board situated on the top side of the MH-660 offers several features. You can simply set the lighting
address, read the number of lamp or unit hours, switch on and off the lamp, run demonstration sequences, make
a reset and also use special functions for manual control and service purposes.
The main menu is accessed by pressing the [Mode] key - press this one so many times until the display shows
message "A001" (with actually stored address). Browse through the menu by the pressing [Up] and [Down] keys
- the display shows step by step these messages: A001, rPAn, rTilt, 16br, Lati, Poti, LAMP, dEMo, rESE,
SPEC. Press [Enter] if you wish to select one of them. The functions provided are described in the following
sections and the function hierarchy is shown below.
7.1 Main functions
A001 - DMX 512 Address settings
The letter "A" flashes. Use the [Up] and [down] keys to select required address (001 - 496) and press [Enter] to
confirm or [Mode] to cancel and return to the main menu.
rPAn - Pan reverse
This function allows you to invert the Pan-movement. Use the [Up] and [Down] keys to select "On" if you wish this
feature or "Off" if you don’t wish this feature and press [Enter] to confirm or [Mode] to cancel and return to the
main menu.
rTilt - Tilt reverse
This function allows you to invert the Tilt-movement. Use the [Up] and [Down] keys to select "On" if you wish this
feature or "Off" if you don’t wish this feature and press [Enter] to confirm or [Mode] to cancel and return to the
main menu.
16br - Movement resolution
By this function you can adjust the desired movement resolution 8 or 16 bit. Use the [Up] and [Down] keys to
select ‘On’ if you wish the 16bit high resolution or "Off" if you wish only 8 bit resolution and press [Enter] to
confirm or [Mode] to cancel and return to the main menu.
Note:
If you adjust the 16 bit resolution the fixture will occupy 16 DMX channels, if you adjust the 8 bit resolution, the
fixture will be operated by only 14 DMX channels. Please, check the DMX protocol.
LAti - Lamp On time
This option enables you to read the total number of hours that the lamp has been powered on. Press [Enter] or
[Mode] to return to the main menu. In order to reset the counter to 0, you have to hold the Up- and Down-button
and press the Enter-button.
Poti - Power On time
By this option you can read the total number of hours that the MH-660 has been powered on. Press [Enter] or
[Mode] to return to the main menu.
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