English
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To operate the lamp at a resonance free frequency the ballast provides three
different methods:
a) MAN
In the "MAN" position the resonant-free frequency can be adjusted manually.
The "MIN / MAX" frequency knob can be used to set the frequency in the
range of 270 Hz (MIN) to 360 Hz (MAX) or 900 Hz (MIN) to 1200 Hz (MAX).
The frequency is displayed at the LED display.
b) AUTO MAN
In the "AUTO MAN" position the initial frequency is adjusted manually by use
of the "MIN / MAX" frequency knob. During operation, the electronic ballast
constantly analyzes the lamp current to detect beginning resonances. In this
case the frequency will be automatically readjusted to stay in the resonance-
free range.
c) AUTOSCAN
In the "AUTOSCAN" position, the search for a non-resonant operation
frequency is done fully automatic. After the warm-up phase of the lamp, the
electronic ballast is automatically searching for an initial frequency that
operates the lamp quietly. This scan process may take up to four minutes.
While the scan is running, the "AUTOSCAN" LED flashes and the actual
frequency is displayed at the LED display.
During the automatic scan for the initial frequency a change of the dimming
value will restart the scan process!
During following operation, the ballast continuously analyzes the lamp
current to detect beginning resonances. In this case, the frequency is
automatically readjusted to stay in the resonance-free range.
Note: If in doubt, the flicker analyzer P.R.O.F. can be used to check the light to
be flicker-free or not within a few seconds.
4.4 Remote Control DMX-512
The electronic Ballast EB MAX 1.8 can be controlled by use of a remote control
according DMX 512 standard. The connectors and operating parts are placed at
the rear side of the ballast.
To operate the ballast by remote control, the ballast’s ON/OFF switch must be
in OFF position! In case of remote operation the "RC" LED is lit. The dimming
potentiometer and the F-Mode tip switch at the front plate are disabled.
Attention: The potential of the remote control signals at the connectors may
not exceed 70 Volts (peak) against protective earth.
Depending on the operation mode, two or three DMX channels are used to
control the ballast:
• The first Channel is used for dimming the output power.
• The second Channel (address following on channel 1), is used for switching
the ballast ON/OFF and for setting the desired operation mode
• The third channel (address following on channel 2) is used for setting the
output frequency with some operation modes.
The LED display at the rear plate of the ballast indicates the address of the first
channel (dimming).
Channel 1 (Dimming)
By sending a value 128 .. 255 on the dimming channel, the lamp power can be
regulated between 50% (128) and 100% (255) of the nominal lamp power.
Values smaller than 127 will be set to 127 (50%).
See figure 4, page 26.
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