how to measuring heat
- Thread starter mrtt
- Start date
Greengenes707
Well-Known Member
It's not measuring heat persay. It's measuring case/junction temps. Heat into the enviorment will be constant of whatever wattage you're running. Improving the cobs mounting will help the COB operating temps, not the enviorment.
But to answer you question: which point of measurement... neither.
The correct way is to use a thermocouple on the Tc measuring point...the little copper dot that nothing is attached to in the pic.
But to answer you question: which point of measurement... neither.
The correct way is to use a thermocouple on the Tc measuring point...the little copper dot that nothing is attached to in the pic.
REALSTYLES
Well-Known Member
Yes be more detailed on what you are doing. Please explain what you need help on
alesh
Well-Known Member
Since his HS is already 50-55°C the Tj can hardly be 50°C.
SupraSPL
Well-Known Member
Maybe he was testing without a fan. In my testing CPU cooler temps between the fins can be as low as 7C above ambient.
The first pic he posted was just a generic example, not his actual temps. Actually that is a pic I posted a long time ago of a CXA3070 3K Z2 but I don't recall where those temps came from I think someone else added that in.
The first pic he posted was just a generic example, not his actual temps. Actually that is a pic I posted a long time ago of a CXA3070 3K Z2 but I don't recall where those temps came from I think someone else added that in.
Last edited:
alesh
Well-Known Member
Might be. Typical CPU cooler should be able to cool Vero18 @1.4A quite easily, shouldn't it?
mrtt
Active Member
wow
please guys open university I'm begging you I'll be your first student!
@SupraSPL you are my hero you know that
I order 8 cxb3070 but I use now only 4 and drive with 185h-c1400ma (A)bin mw.
my question really simple ;
I use before hps (600w) in summer and heat really melted everything , now I trying to use cob literally like the same situation again and I scared this
when I hold my hand under the light my fingers burned. is it normal ?
normal circumstances what should be degree ?
@alesh thankyou
please guys open university I'm begging you I'll be your first student!
@SupraSPL you are my hero you know that
I order 8 cxb3070 but I use now only 4 and drive with 185h-c1400ma (A)bin mw.
my question really simple ;
I use before hps (600w) in summer and heat really melted everything , now I trying to use cob literally like the same situation again and I scared this
when I hold my hand under the light my fingers burned. is it normal ?
normal circumstances what should be degree ?
@alesh thankyou
SupraSPL
Well-Known Member
O gotcha I see now you used the plastic holders. Did they work OK, very good price on those.
Regarding the 600HPS, you should be able to get the same job done with 300W of COBs. Sounds like you are starting off with 200W and you are running at 48% efficiency, so your yield will probably be close and 1/3 the total heat in the system, awesome
Driven at 50W ea your COBs are emitting 25W of pure radiant energy into a very small surface area. 25W of photons will easily scorch flesh or ignite combustion if an object is placed very close to the LES, perfectly normal. Very important to keep safety in mind so they must be hung very securely and with a smoke detector and fire extinguisher nearby, as with any grow. Good luck!
Regarding the 600HPS, you should be able to get the same job done with 300W of COBs. Sounds like you are starting off with 200W and you are running at 48% efficiency, so your yield will probably be close and 1/3 the total heat in the system, awesome
Driven at 50W ea your COBs are emitting 25W of pure radiant energy into a very small surface area. 25W of photons will easily scorch flesh or ignite combustion if an object is placed very close to the LES, perfectly normal. Very important to keep safety in mind so they must be hung very securely and with a smoke detector and fire extinguisher nearby, as with any grow. Good luck!