Backup light issues

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Cupronickel
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Backup light issues

Post by Cupronickel » Sun Dec 06, 2015 2:26 pm

I have a DRIS 1000 lumen dive light as a back up light (http://www.diverightinscuba.com/lightsr ... fgodHXIKbg), sorry long link. Anyways it has a twist on/off function, and on two or three occasions it has come on by itself at depth. These flashlights dont twist on/off too easily so I doubt its rubbing againt something causing it to turn on. Anyone else use this light and have this issue? Is it related to the type of switch this light uses?
A flute without holes is not a flute, a doughnut without a hole is a danish.

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mpenders
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Re: Backup light issues

Post by mpenders » Sun Dec 06, 2015 3:00 pm

Try untwisting it just a little bit more when you turn it to off. The increasing pressure at depth will sometime compress the head enough to complete the circuit, causing it to turn on.

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fmerkel
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Re: Backup light issues

Post by fmerkel » Sun Dec 06, 2015 4:08 pm

Agree, the pressure is compressing the light enough to establish contact.
Are you lubing the O-ring with decent silicone grease? IMO Trident isn't.....the last stuff I got was slippery cottage cheese.
Not a bad idea to open it up once in awhile, check everything, and re-lube.
To Air is Human,
To Respire, Divine.

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bm5w
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Re: Backup light issues

Post by bm5w » Sun Dec 06, 2015 4:08 pm

+1 Just untwist it a bit more. It's the pressure at depth that turns it on.
I have had this issue with this specific light and other twist on lights. Certainly nothing uncommon and nothing an attentive buddy can't fix for you :)

Cupronickel
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Re: Backup light issues

Post by Cupronickel » Sun Dec 06, 2015 4:55 pm

Thanks for the replies guys, will do.
bm5w wrote:+1 Just untwist it a bit more. It's the pressure at depth that turns it on.
I have had this issue with this specific light and other twist on lights. Certainly nothing uncommon and nothing an attentive buddy can't fix for you :)
Funny you should mention this, Ive had a buddy turn it off underwater before.
A flute without holes is not a flute, a doughnut without a hole is a danish.

Rockfish
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Re: Backup light issues

Post by Rockfish » Mon Dec 07, 2015 6:10 am

With my twist on lights after I turn them off I usually press in on the head to see if that will turn on the light if it does I undo it a little bit more. There is a fine line between having it unscrewed enough to be turned off and having it unscrewed too far and flooding. I have had some well meaning dive buddies turn off my screw on lights at depth only to find out that once I ascended and the pressure reduced it ended up flooding the light. Gets a little expensive when you have to start replacing LED light modules.

Mike

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fmerkel
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Re: Backup light issues

Post by fmerkel » Mon Dec 07, 2015 8:06 am

The amount of twist to turn it off should be minor, like 1/4-1/2 turn. The light should not be so touchy that a whole turn makes it leak if it was just at the point of turning on.
FWIW I went through 3 UK SL3 (3 C-cells) before I got one that did not 'weep', say maybe a drop or 2 on a dive. None ever flooded. I'd just find corrosion and damage after several months of non-use diving (not a battery problem). UK always made it right and the current one is over 2 years old and just fine. I open it up every month or 2 to check it, recharge the batteries. and clean+lube the O-ring.
To Air is Human,
To Respire, Divine.

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