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set-up and operation
User Set-Up Options
Mains / Battery Voltage Supply
The following options are available in the 'user set-up' mode
The Gemini R range is a single / fixed voltage unit (117V or
for review or change:
230V) and will only operate from a fixed mains (AC) supply
(either 117V or 230V); or via one of Bowens battery systems.
TENTHS
Functions & Options
Setting
Default
Always check the supply voltage for each unit before using.
0
Reset all options to default
0 & 1
0
(set to 1 to reset options).
The recommended voltage supply for each unit is stated on
1
Invert Display
0 & 1
0
the rear panel just below the mains connection (page 4).
(normal (0) or invert (1)).
2
Photocell Trigger
1,2,3 & 4
1
To use the Gemini from a mains supply the 'mains / battery
(can be set to trigger on the
first (1), second (2), third (3)
power switch' (page 4) must be in the upper position.
or the fourth (4) flash detected).
3
Lamp Ready Indication -
0 & 1
0
The Gemini Pro range units are all multi-voltage and will
(intermittent (0) or pulse (1)).
operate from a nominal 117V or 230V mains power supply (as
Flash Dump
4
0 & 1
0
well as from one of Bowens battery systems), once a mains
(off (0) or on (1)).
power supply is connected to a Gemini Pro and the unit is
5
Ready Sounder -
0 & 1
0
switched on, the unit will automatically detect the voltage
(intermittent (0) or
supply it is connected to.
continuous (1)).
6
Auto Lamp-Saver
0 to 99
30
(off (0) or number of minutes
The battery (DC) input from a Bowens battery system is
until activation (1-99)).
automatically detected when connected and the unit
switched on. To use the Gemini from a battery system the
'mains / battery power switch' (page 4) must be in the lower
position.
Flash Power Control
Infra-Red Remote Control Power Adjustments
The flash power is set using two rotary dials (fig.1); the left-
The first position (REM) on the 1-stop power adjust dial sets
hand dial is used to increase or decrease the flash power in
the unit to operate from Infra-Red remote control only. Once
full 1-stop adjustments, the right-hand dial is used to control
the unit is set to operate from IR remote control the power
the power in exact
⁄
th
-stop adjustments. Both settings are
setting can then only be read from the LED display, as the
1
1 0
indicated on a scale around each dial; the current setting is
power adjust dials will not function.
also shown on the LED display.
Once the unit is in remote control mode, the
The maximum F-stop (power setting) depends on the flash
adjustment dial selects the prefered remote control channel:
power rating of each individual unit. 250Ws, 500Ws and
750Ws units provide a 5-stop power range, F1.0 to F6.0 (5-
position 0 (0.0 tenths) = All channels,
stop power adjustments over 6-stop points is equal to full
position 1 (0.1 tenths) = channel 1,
power to
⁄
). The 1000Ws and the 1500Ws units provide a 7-
position 2 (0.2 tenths) = channel 2,
1
3 2
stop range, F1.0 to F8.0 (7-stop power adjustments over 8-
position 3 (0.3 tenths) = channel 3,
stop points is equal to full power to
⁄
).
position 4 (0.4 tenths) = channel 4 etc.
1
1 28
The IR channel can be adjusted at any time once the unit is in
remote mode (REM).
Automatic Flash Dump
Automatic flash dump (as well as standard resistive dump)
can be selected during the 'user set-up' mode, which is
available when the unit is switched on (see page 5 for 'user
fig1.
set-up' mode and options).
Automatic flash dump is a built-in feature of the Gemini R and
Pro level models. The Gemini's intelligent management
system controls the automatic flash dump function by
monitoring the difference between the current, set flash
power level, and the target power the unit has just been
adjusted to. The management system decides if it would be
quicker for the unit to flash dump the power and recharge to
the desired level or to simply resistive dump the power to the
required level. The automatic flash dump only works 1-2
seconds after the user has stopped adjusting the flash power.
1
⁄
th
-stop power
1 0
Note: When turning a Gemini R or Pro off, the unit will
automatically dump the charged power, this is to ensure that
no flash power is stored in the capacitors while the unit is
switched off.
Power Charging / Dumping Indicators
The illuminated 'flash test' button on the side of the unit (see
page 4) shows the charging status as follows:
Charging
-
Green LED flashes quickly
Ready
-
Green LED lit continuously
Dumping
-
Green LED flashes slowly
Flash Ready Indicators
There are various indications available on the unit to let the
user know when the unit is 100% charged and ready to fire.
Ready Sounder - an audible ready beep is available via an on
/ off rocker switch at the rear of the unit (see page 4); the
ready beep can also be switched on / off from a remote
operation
control (only in REM mode).
The ready sounder can be used in two ways; the user can set
the ready sounder to either emit a continuous beep while the
unit is charging and go off when it is 100% ready, or the unit
can be set to emit a short beep when the unit is charged and
100% ready. The ready sounder options can be set during
'user set-up' mode. See page 5 for user set-up mode
instructions.
Modelling Lamp Ready Indications - the modelling lamp
can be used as an indication as to when the unit has fully
charged and is ready to fire. The modelling lamp can be set to
'intermittent' or 'pulse'. When the modelling is set to
intermittent the lamp will extinguish when the unit has fired,
and illuminate again after the unit has charged and is 100%
ready. The modelling lamp 'ready' indication settings can be
adjusted during the 'user set-up' mode.
If the modelling ready indication is set to pulse, the lamp will
simply pulse during the recharge state and come back to the
current setting once the unit has charged and is 100% ready.
In pulse mode, if the modelling lamp is set to a low level when
the unit is fired the modelling will increase in brightness /
output during the recharge state and then lower again to the
current setting when the unit has charged and is 100% ready.
If the modelling is set to a high level when in pulse mode, the
modelling will decrease in brightness / output once the unit
has been fired and will increase again to the current setting
once the unit has charged and is 100% ready.
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