Setting a curve for a discharge lamp

Hi there

Working on a show and the director would like to use two 400W discharge fluorescent UV lamps. The position I would like to rig them means they can only be patched into the dimmers.

My question is.... Can I set a 'switch like' function on the Ion? So they don't dim and are either on or off. Can I set a Curve? If so how do I do this?

If I can do this, what is best, to do this on the dimmers? Or on the desk itself ?

Grateful for your help

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  • ageyreader said:

    Can I set a 'switch like' function on the Ion? So they don't dim and are either on or off. Can I set a Curve? If so how do I do this?

    Absolutely not.
    Most professional dimmers have soft-start, topset/bottomset and/or voltage regulation features.
    These are great for tungsten and other dimmable loads, but mean that 0% DMX input isn't necessarily 0% output, and 100% DMX input may not always give 100% output.

    ageyreader said:

    If I can do this, what is best, to do this on the dimmers? Or on the desk itself ?

    The only place to consider this is at the dimmers.
    Most dimmers have a "Switched" mode where they disable all the above features and only output Zero or Full, regardless of the DMX input.

    However, many non-dimmable devices can still be damaged if they are driven from a dimmer in switched mode, or even a "solid-state-switch" (which is the same electronics but without a choke)

    The first thing to do is to check with the manufacturer or supplier of the non-dim device to find out whether it can be run from a dimmer in switch mode.

    If they can, then you're fine - set the dimmer to switch mode and off you go!

    If they cannot, then you'll need to find a relay solution.

    If your dimmers are Sensor racks, this is really easy!
    You can either swap the dimmer module for a relay module or if you have our ThruPower modules, simply set the circuit to Switch mode and that automagically turns it into a relay.

  • This is great thank you so much.

    I will do all of the above. Checking with the manufacturer is good idea.

    We have Strand Act 6 Digtal dimmers and I am pretty sure you can set these to a switch mode.

    Again its much appreciated.



    [edited by: ageyreader at 5:55 AM (GMT -6) on Thu, Apr 24 2014]
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