AlienBees ABR800 Manual de instruções - Página 2

Procurar online ou descarregar pdf Manual de instruções para Flash da câmara AlienBees ABR800. AlienBees ABR800 16 páginas. Ringflash

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Safety Precautions

For your safety, please note these warnings:

WARNING! This unit contains no user serviceable parts and should not be disassembled except by a qualified

technician. Please do not attempt to disassemble or service this unit on your own. The only par ts that you may

replace yourself are the flashtubes and modeling lamps, though caution must be taken here as well and the unit must

be powered down while these items are replaced (instructions for replacement of these items are included in this

manual). Always turn your unit OFF and unplug it whenever attaching or removing any accessories (such as the

reflector, diffuser and camera platform) and whenever you are replacing the modeling lamps or flashtubes.

The unit may only be connected to a 3-wire grounded AC outlet to avoid shock hazard. Do not connect the unit

to ungrounded outlets, or to two-wire extension cords or adaptors that eliminate the ground prong.

Do not allow any unattended children around this unit (or any other studio flash equipment) as potentially dangerous

conditions may result including burns and electrical shock hazards. Please be safe with your equipment!

Most cars are capable of traveling 120 MPH on a winding gravel road and do not place limits on your ability to do this.

But common sense indicates that if you drive this way you are probably going to ruin your car and perhaps your life. Even

if you don't have a wreck, if you do this for a long period of time you will surely overheat the engine and burn it up. That

said, the ABR800 units (as well as our other products) have safe operating parameters that are difficult to place limits or

user controls upon and it is up to the user to exercise reasonable caution in heavy-use situations and in unusual shooting

configurations.

Heat Considerations: The ABR800 has high intensity modeling lamps that produce considerable heat, as well as a flashtube

and internal electronics that must dissipate 320 Ws for each flash. An internal fan removes the heat from these sources

in most configurations in normal use. However, if the unit is flashed each time it recycles and the modeling lamps are left

continuously on at full brightness, operating under these conditions requires the dissipation of about 500 watts of heat.

While the unit can tolerate this for shor t periods of time, it cannot do this indefinitely without overheating and being

damaged. This is aggravated when accessories such as the grids, gels, diffusers and softboxes restrict the airflow. In order

to guide the user, we conducted a series of tests on an ABR800 fitted with the cover / diffuser, the honeycomb grid and a

gel.

TEST 1 – Long Term Shooting: The modeling lamps were set to the Model = Ready Mode to reduce the heat load during

firing. The ABR800 unit was fired continuously at Full Power once every 20 seconds. Under these conditions, the temperature

of the grid and diffuser eventually stabilized at 200°F. The unit is designed to allow for temperatures up to 250°. Beyond

this, there is concern for user-burns and damage to components. Conclusion: This configuration is generally acceptable.

Shooting rates could likely be increased to about one shot per 10 seconds on a long term basis without damage. However,

additional care should be taken if the unit is facing downward as this will increase the amount of heat flowing back into

the electronics. Common sense suggests feeling the outside of the ABR800 housing occasionally during shooting. If it feels

extremely hot to the touch you should let the unit rest for a while. You can reduce the amount of heat build up by setting

the Modeling Lamps to Propor tional (Tracking Mode) and by setting the lamps to Model = Ready Mode.

TEST 2 – Burst Shooting: We next fired the ABR800 once per second in Model = Ready mode. The unit was already at

200ºF at the beginning of this test. After 100 shots, the temperatures reached the 270°F point. The unit was allowed to

rest for five minutes with the modeling lamps still on Full brightness and the temperatures returned to 200°F. Conclusion:

Burst shooting should be limited to about 50 consecutive shots in 50 seconds, followed by a 3-minute rest period.

TEST 3 – Destruction Testing: In this test, we turned the model lamps on (Model = Ready = Off) and fired at Full Power

once per second. After 150 flashes in 150 seconds, the diffuser reached over 300°F and began to soften and melt. In this

test, the electronics continued to function, but this sor t of overuse is obviously not acceptable and can result in serious

damage to the unit.

General Recommendation: Based on these results, a prudent operating routine would be to limit Full Power operation with

modeling lamps (preferably in Model = Ready Mode) at a long term rate of no more than 20 flashes per minute, or to a

burst rate of no more than 50 flashes followed by a rest period. If the unit is used at less than Full Power, par ticularly with

the modeling lamps OFF or in Propor tional (Tracking) mode, propor tional higher usage rates can be tolerated. If the unit

feels very hot to the touch, a rest period with the modeling lamps off is indicated.

Toll Free 1-800-443-5542 Please call us if you need any assistance!