Identifying lighting requirements for in house Calibrations

Y

Yogurt

#1
Marc, could you be so kind as to helping me in identifying lighting requiremens for in house Calibrations, meaning calibrating MT&E for mfg shop use. We are not A2LA accredited but still need to ensure that we meet ANSI requirements. Thanks in advance,
Yogurt
 
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Marc

Fully vaccinated are you?
Staff member
Admin
#2
Re: Identifying lighting requiremens for in house Calibrations

I am not aware of any specific lighting requirements in any standards. Hopefully one of the others here can comment/help.
 

dgriffith

Quite Involved in Discussions
#3
Re: Identifying lighting requiremens for in house Calibrations

I think if you light 100 candles and put them all 1 foot away from the work surface . . . . In the old days before the SI, I remember a 100 ft.candle thing at the work surface or some such. More is better as long as it isn't blinding/glary. :cfingers: :D
 

Hershal

Metrologist-Auditor
Staff member
Super Moderator
#5
Marc, could you be so kind as to helping me in identifying lighting requiremens for in house Calibrations, meaning calibrating MT&E for mfg shop use. We are not A2LA accredited but still need to ensure that we meet ANSI requirements. Thanks in advance,
Yogurt
Any such requirements are likely to be in specific technical standards. Neither ISO/IEC 17025 nor ANSI/NCSL Z540.3-2006 have specific requirements to my knowledge.
 
Y

Yogurt

#6
Thanks everyone for the quick response, Hershal your information was very helpful. Have an awesome day Everyone. ~Y
 

gpainter

Quite Involved in Discussions
#7
not sure if there is a standard with a specific foot candle call out. Generally speaking for inspection areas it can range 135-165. You can check ANSI/IESNA RP-7-01, it may have specific guidance. Check with your lighting supplier as most of them have a copy of the RP
 

BradM

Staff member
Admin
#8
Your question is quite a good one, and very interesting. :agree1:

I did some poking around, as surely... there are some illumination requirements. I don't know of any that are required for a calibration lab specifically. Although, the general statement "to ensure valid results" would be applicable. Ya know... people get old and their eyesight diminishes. So the lighting in a lab should be sufficient that all can see well enough to perform their work, and to document things accurately.

Being an electrician, I was first interested in the National Electric Code (N.E.C.) Mike Holt is considered an expert with the N.E.C. He has an interesting discussion on illumination here. In that discussion, they talk about energy conservation requirements; something I didn't even think about. So for example, California has illumination requirements.

From that discussion, there is a link to the Illuminating Engineering Society that can assist with this issue.

Finally, OSHA has some general guidelines that could be used.

From my own perspective, I haven't been to too many places that I considered over-illuminated. :) As someone mentioned, your local lighting supply can assist. While your do-it-yourself places (Lowes/Home Depot) are good, you should go to a lighting expert store. They can show you the different options. There are many lighting options that may have an initial high cost, but then deliver a very low operating cost and good energy conservation.
 

dgriffith

Quite Involved in Discussions
#9
Even though I was a little tongue-in-cheek in an earlier post, this, from a source more-than-trustworthy than I, apparently :D; paraphrasing:
Use fluorescent lighting with recessed fixtures to minimize dust collection and room heating. They should have RF line filters and be RF interference free.
Light intensity should be 100 candela (foot-candle)(1076 lux) nominal or a minimum 800 lux at bench level throughout the lab. However, human factors also apply and lower levels are acceptable if lighting is too intense, as long as it doesn't interfere with the task at hand.

Ref:
Fluke's Calibration Philosophy in Practice, 2nd Ed.
Sec. 6 Lab Management
 
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