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DIMMER
- Device used to control the intensity of a lighting fixture.
- A device which causes connected lamps to decrease in intensity. Most dimmers for entertainment lighting use are some variation of an SCR. Individual dimmers are traditionally arranged in modules of two dimmers with modules combined into dimmer racks.
DIMMER DOUBLING
A system designed by ETC where two ETC lanterns can be connected to a single ETC dimmer, and have different intensities. It only works with 115V / 60Hz supplies (e.g. USA). A special adapter ("twofer") is connected to the dimmer output. This contains a series of diodes which split the AC sine wave into two halves (positive and negative). Each half is sent to a separate socket on the adaptor and from there to a modified ETC Source Four lantern with a 77 volt lamp. Using these lower voltage lamps means that full intensity is achievable using only half the AC wave. The system will not work in the UK or other countries with 50Hz power supplies as the flickering of the lamps is too noticeable.
DIMMER LAW (Control desk)
The dimmer law in a lighting desk defines the relationship between the control value (fader position) and the console output value (outgoing DMX level).
DIMMER LAW (Dimmer)
The dimmer law defines the relationship between the incoming DMX control value and the dimmer output RMS voltage. Common dimmer laws are "linear RMS voltage" and "linear light output". Around the rated lamp voltage the light output is quite sensitive to voltage variations (a slightly lower voltage can also improve lamp life). If the dimmer is set to "linear light" and you fade from 100% to 95%, the light output will be reduced by 5%. If you set the dimmer to "linear RMS voltage" and you fade from 100% to 95%, the light output will be reduced by more than 5%.
DIMMER PACK
A portable enclosure containing between 3 and 12 dimmer modules.
DIMMER PACKS
Dimmer packs are a variable switch that uses 0-10V signals to control lighting. A dimmer pack will dim lighting proportionally to the input signal.
DIMMER PER CIRCUIT
- Each circuit has its own individual dimmer.
- A dimming and circuiting system in which every circuit in the system has its own permanently wired dimmer.
- A lighting installation where there is no patching system. Each lighting circuit / socket has a dimmer always connected to it. This has advantages in that you never run out of dimmers, but allows no flexibility and can have cost disadvantages in a large space.
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