Jump to content
Shachar Alfie

HMI UV TESTING

Recommended Posts

You send it to a lab. It's expensive.

 

You can get UV shielded HMI lamps now, which gives you an extra layer of confidence.

Share this post


Link to post
Share on other sites

You send it to a lab. It's expensive.

 

You can get UV shielded HMI lamps now, which gives you an extra layer of confidence.

thanks

for 2500w hmi koto is the only UV Block option.

I also want to test my old double ended hmi.

Share this post


Link to post
Share on other sites

Yes, it's a nice idea to be able to test. You could probably jury-rig some sort of approximate test.

 

The problem is, you're doing it for safety reasons, presumably. This means that if the test isn't done properly, in a way that an insurance company would understand and be willing to cover, then that test is of very little value.

 

I would suggest that if it's properly-maintained equipment made by a reputable company and used properly, it probably is safe, but the only way to verify that in a meaningful way is to take it to a laboratory that's properly set up to perform that sort of testing. I don't even know what certification a lab would need in order to do that sort of work, but places that claim to be able to do it exist.

 

I was quoted about UK£600 (around US$900) to test one item.

Share this post


Link to post
Share on other sites

Why do you have a concern? Is it a PAR? Do you always use it with a lens? Is it a Fresnel? Doesn't operate without the lens door closed which blocks most of the UV, just like the PAR lenses. In either case, there is a minimum safe distance that should be maintained between HMI fixtures and talent. That is spelled out by the manufacturer.

Share this post


Link to post
Share on other sites

Note that certain PARs, which have been used with discharge lighting including MSR, CMH and HMI, have been found in the wild with lenses that are not sufficiently UV-blocking for safety. ETC's Source Four PAR was supplied with lenses which are adequately UV-blocking for use with a 575W HMI. Some of the clones of the Source Four PAR have used lenses which were not; at a car show, several of the scantily-clad women on the booth went home with sunburned shoulders.

 

It is a real concern and actual problems have occurred.

 

P

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Wooden Camera



    Metropolis Post



    Ritter Battery



    New Pro Video - New and Used Equipment



    Paralinx LLC



    Broadcast Solutions Inc



    Visual Products



    Gamma Ray Digital Inc



    Tai Audio



    Serious Gear



    Media Blackout - Custom Cables and AKS



    Abel Cine



    Glidecam



    CineLab



    Rig Wheels Passport


×
×
  • Create New...