Convoy S21D Temperature protection not working

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fatboy
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Convoy S21D Temperature protection not working

Convoy S21D 219B Temperature protection not working.
Did I turn this off some how?
How hot can it get without hurting flashlight or battery?

tactical_grizzly
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How do you know it’s not working? In my experience, Convoy lights do have thermal regulation but the temp limit is way too high so they can get scalding hot. It SEEMS like it’s not working, but it is.

fatboy
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I measured with a infrared thermometer indoors tail standing. Head Body tube
Start 69f 69f
1:00 113f 82f
2:00 135f 97f
3:00 148f 109f

Then I turn if off

stephenk
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My S21D gets very hot, but the temperature regulation is working there is a gradual step down starting from approx 90 secs.

tactical_grizzly
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fatboy wrote:
I measured with a infrared thermometer indoors tail standing. Head Body tube
Start 69f 69f
1:00 113f 82f
2:00 135f 97f
3:00 148f 109f

Then I turn if off

148f equates to 64C. That’s very toasty, and we’ll past the advertised 55C limit. Sounds like it may be faulty.

The only other explanation I can think of is that you’re thermometer is giving a false reading. I know different surfaces can trick them a little bit but I don’t know how to correct for that. I find faulty thermal regulation more likely as an explanation.

fatboy
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tactical_grizzly wrote:
fatboy wrote:
I measured with a infrared thermometer indoors tail standing. Head Body tube
Start 69f 69f
1:00 113f 82f
2:00 135f 97f
3:00 148f 109f

Then I turn if off

148f equates to 64C. That’s very toasty, and we’ll past the advertised 55C limit. Sounds like it may be faulty.

The only other explanation I can think of is that you’re thermometer is giving a false reading. I know different surfaces can trick them a little bit but I don’t know how to correct for that. I find faulty thermal regulation more likely as an explanation.

I tested again with similar results. I didn’t notice the light stepping down must be faulty thermal regulation. How hot is to hot for the flashlight?

tactical_grizzly
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About 70C is generally considered the highest safe temperature I think. The battery is the weakest link and they aren’t usually rated for more than 70C.

varbos
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I would not expect super-precise temperature protection from a Convoy. I think it’s pretty crude.

You are at the mercy of component quality and consistency, plus whatever limit is already programmed in. It will vary a lot from one flashlight to another. Some will step down way too soon. Others will get crazy hot.

It is what it is.

lfb
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It may be more effective to test brightness rather than temperature. You can do this using a smartphone’s light sensor. Pointing the flashlight at the ceiling of a dark room should see something like a 50% reduction in brightness in less than 10 minutes.

SMOKEU
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Just tested mine and it’s holding at 60C