Posted by MarkB_MI on October 12, 2019 at 05:14:17 from (174.230.18.227):
In Reply to: Welding hood posted by 37chief on October 11, 2019 at 09:18:27:
They have batteries. They also will go into a sleep mode to prevent the batteries from going dead if the helmet isn't used for an extended period.
It's a good idea to sit your helmet out in the sun for a few hours if it's been stored in the dark to bring the batteries up. You can check the helmet by pointing it at the sun, but if it has gone to sleep that may not activate it. My Lincoln helmet went to sleep and I had to expose it to an actual welding arc before it would activate again. After that, it would react to the sun.
There are videos showing how to replace the batteries in some helmets, but I wouldn't tear apart my autodark unit without first trying to recharge it in the sun.
Wearing polycarbonate safety glasses under your helmet is a good idea, whether or not you use an autodarkening helmet. They will stop the majority of the UV radiation that's responsible for eye damage.
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