Modelling Lamp Output/Control - Bowens DUO 2400 PACK Operating Instructions Manual

When switched to 'ISOLATE' both the 'ACTIVE' LED's will be lit, indicating that the
two 'FLASH' variators and Channels operate independently, with each providing a
continuous adjustment over a 3 f-stop range. Each Channel has a maximum
output of half that set by the 'POWER' switch which may be used to adjust the
overall light level without affecting the balance between channels set by the
'FLASH' variators.
When switched to 'COMBINE', only the 'ACTIVE' LED for Channel A will be lit and
both A and B Channels will be controlled by the Channel A 'FLASH' variator which
provides a continuous adjustment over a 3 f-stop range. The maximum output set
by the 'POWER' switch is available from EITHER socket.
The total control range using a combination of Flash Heads, 'FLASH' variators,
'POWER' switch and 'COMBINE/ISOLATE' switch is 6 f-stops.
In general the 'POWER' switch should be set to the lowest setting and the
'FLASH' variator(s) set to the highest, consistent with the flash power and the
distribution between heads required. This method provides the shortest flash
duration for a given power output. Fitting two heads will also reduce the flash
duration.
Whenever the 'POWER' or 'FLASH' controls are changed, flash the Pack once
using the 'OPEN FLASH' button to ensure that the next flash is of the required
power.
A study of the quick reference tables on pages 16 and 17 will explain the possible
combinations of MAXIMUM power available to the individual Flash Heads.

Modelling Lamp Output/Control

Refer to the Instruction Manual provided with the head for more details of the controls
and maintenance of the head.
The Modelling Lamp for each Channel is controlled by a 'LAMP' variator and a
'CONTINUOUS/OFF/INTERMITTENT' switch on the control panel. Most Flash Heads
are fitted with a Modelling Lamp 'ON/OFF' switch which allows individual Lamps to be
turned off.
The 'COMBINE/ISOLATE' switch determines which Modelling Lamp
'CONTINUOUS/OFF/INTERMITTENT' switch and 'LAMP' variator have control. With
the switch set to 'COMBINE' the Channel A switch and variator have control over
BOTH Modelling Lamps. The Channel B switch and variator will have no effect and
neither of the indicator LED's will be lit. With the switch set to 'ISOLATE' the Channel
A and Channel B switches and variators have independent control over the Modelling
Lamps in their respective Channel.
Set the appropriate Modelling Lamp switch to the centre position to switch the
Modelling Lamp OFF for the required channel. Neither indicator LED will be lit for that
channel.
Set the appropriate Channel Modelling Lamp switch to 'CONTINUOUS' to switch the
Modelling Lamp ON. The Green indicator LED will be lit and the Lamp brightness can
be continuously adjusted over a 3 f-stop range using the 'LAMP' variator for that
Channel.
Set the appropriate Modelling Lamp switch to 'INTERMITTENT' to enable the
Modelling Lamp to go out when the Pack is flashed and come back on again when
'READY'. The Red indicator LED will be lit and the Lamp brightness can be
continuously adjusted over a 3 f-stop range using the 'LAMP' variator for that Channel.
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