Profoto D4 - Manual (Page 14)

Profoto D4 – Generators D4
The Light Shaping Company 23 Profoto
Energy Distribution
The Profoto D4 generators offer a very flexible, fully asymmetric energy distribution to
all four outlets. This means using one D4 generator is like four separate generators, without
the need to plug or un-plug lamp heads for power changes. The 8 f-stop power range in full
or 1/10 f-stops allows precise light adjustments, the use of high speed films and even the use
of large aperture techniques. All settings can be done directly and every adjustment is dis-
played immediately. It is possible to activate and deactivate each head separately by the
push of a button.
One head
When only one lamp head is in use, choose the A or B socket [9]. These sockets can be used
to release the generator’s total energy to one lamp head. With one head used at socket C
you can get 50% and with one head used at socket D you can get 25% of the max. power.
The total power range on outlets A or B with one head is 8 f-stops.Turn on the generator by
pressing the
On/Standby Button [3]. To turn on the chosen Lamp Head Socket [9], press
the corresponding Flash and Modelling Light Button [12] and the Power Display [10] is
activated. Use the corresponding Power Dial [13] to adjust power in 1/10 f-stops.
By pressing down the dial while rotating, full f-stop adjustments are achieved. The dials
can be turned in both directions without limitations. It is not necessary to dump the energy
after any power adjustment; the
Ready Lamp [18] will light up when 100% of the desired
power is reached. Change the display from Ws to relative f-stops and vice versa by pressing
the
Ws/f-stop Switch [11].
Two or more heads
Connect the heads to the Lamp Head Sockets [9], starting with A, next B etc., press the
On/Standby Button [3] and turn on the heads needed by pushing the corresponding
Flash and Modelling Light Buttons [12] to activate the outlet and Power Display [10].
A small dot in the right corner of the Power Display (s) [10] indicates, that a non-activated
head is connected properly. Non-used outlets are automatically deactivated. The D4 will
always start working with the last power distribution used before the generator was
deactivated respectively disconnected from the mains. Turn the
Power Dial(s) [13] of the
head(s) used to adjust energy in 1/10 f-stops. By pressing down the dials while rotating,
full f-stop adjustments are achieved. The display stops and a double beep is audible when
the max. power of the corresponding socket is achieved. It is not necessary to dump the
energy; the
Ready Lamp [18] will light up when the desired energy is reached. Change the
display from Ws to relative f-stops and vice versa by pressing the Ws/f-stop Switch [11].
To adjust the power of ALL heads used proportionally, hold down the Master Button [14]
and rotate any of the active head(s) Power Dial(s) [13] until the desired power level
is reached.