User manual PROFOTO ACUTE 12 & 24 GENERATORS

[. . . ] When using the flash, do not place filters, diffusing materials, or any other obstructions directly onto the glass cover, flash tube or modelling lamp !When mounting umbrella, do not touch flashtube or modelling lamp with the metal shaft-there is risk of high voltage ! CONTENTS Nomenclature generator . . . . . . . . . . . . The equipment is not userserviceable and there is dangerous high voltage inside! [. . . ] Connect the unit to the mains with the cable included in the delivery. Never use ordinary household extension cords to extend the power cable. They may overheat, Contact your Profoto distributor for proper equipment. When a lower energy setting is chosen, with the "Bracketing" selector, release a flash so that the unit can recycle for the new energy setting 7 SYNCHRONIZATION Synchronise by connecting the synchro cable from the camera to the synchro input. When the synchro cable is connected the built-in photocell will be disabled. FLASH HEADS Acute (AB and ABS) flash head The AB/ABS flash head is fan-cooled. The AB flash head is delivered with the Disc reflector intended for use with an umbrella. When more advanced lighting is desired, we recommend the use of any of Profotos many accessories and reflectors all easily attached directly onto the head. without fan cooling, which puts a limit on the number of flashes that the lamp head can emit without overheating. The maximum output is 4800 Ws per minute which is to a 2400 Ws flash every 30 seconds or 1200 Ws flash every 15 seconds, or 600 Ws flash every 8 seconds, or 300 Ws every 4 seconds, and so on. The modelling lamp included in the delivery is a 100 Watt medium screw base lamp (E27)The AB head can also be fitted with a Halogen 150250 Watt medium screw base lamp (E27). The flash tube and the modelling lamp can be enclosed in a frosted glass cover for a closer matching of modelling light and flash illumination. The ABS flash head is delivered with the Zoom reflector, Halogen modelling lamp 150 Watt and frosted glass cover. PHOTOCELL AC 8 9 FLASHTUBE A UV-coated Quartz flash tube is included in standard PA and AB/ABS flash head deliveries. The flash tube has two metal pins for insertion into the unit. When removing a flash tube, pull it straight out of the sockets. When inserting a flash tube, check that the trigger-wire connection clasps properly around the flash tube. ALWAYS UNPLUG THE LAMP CABLE FROM THE GENERATOR BEFORE CHANGING MODELLING LAMP OR FLASH TUBE. ENERGY DISTRIBUTION The energy is divided into two groups. A and B. The energy in A can be released through ONE flash head and the energy in B can be released through ONE flash head or can be divided equally between TWO flash heads. The two groups (A and B) can be isolated or combined. The energy can be reduced to half in both groups by using the full/half switches. The total energy can additionally be reduced by using the bracketing dial (see Energy control). The total energy in the Acute12 is 1200 Ws and in the Acute24 2400 Ws. The energy can be divided symmetrically or asymmetrically as follows: COLOURTEMPERATURE A frosted glass cover is included in AB Special (ABS) flash head deliveries. It gives, in combination with the UV-coated flash tube, a recommended colour temperature for daylight type film. Distinctive colour temperature adjustments can be obtained by combining flash tubes and/or glass covers with different coatings. ONE FLASH HEAD . . [. . . ] It is of course possible to choose only a 1/4 f/stop "bracketing". 1/1 energy to 1/2 energy is one f/stop and between dots is a 1/4 of one f/stop. WARRANTY All Profoto products are guaranteed for a period of 2 years, with the exception of flash tubes and modelling lamps. TECHNICAL DATA Guide no. Zoom reflector Umbrella Acute12 128/422 90/296 45/148 Acute24 180/592 128/422 64/211 Flash duration (tO, 5) at: 2400 Ws 1200 ws 600 Ws 300 ws 15ows 1/300 sec. [. . . ]