asymmetric distribution

questions regarding the handling of DIALux evo. (features, tools, options, settings)
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rahzan
Posts: 5
Joined: Tue Mar 06, 2018 8:03 pm

asymmetric distribution

Post by rahzan » Tue Mar 06, 2018 8:22 pm

I have just started with dialux evo a few minutes ago. ( i.e. an ultra beginner)
I put together a street and imported and ies file from the manufacturer.
The distribtions should be symmetric with two T3 fixtures but it is far from it.
I see that the thumbnail for the luminaire shows symmteric blue contour and a lopsided red.
1. What is the difference between the blue and the red contours?
2. could the red contour explain the asymmteric light distribution?
3. If the settings are all set to Imperial, Are the indicated results in fc? (they seem very low!)

Thanks in advance.
Attachments
dialux lopsided.png
dialux lopsided.png (96.91 KiB) Viewed 1178 times

T.Magenheimer
Posts: 1167
Joined: Thu Jul 26, 2012 10:16 am

Re: asymmetric distribution

Post by T.Magenheimer » Thu Mar 08, 2018 12:18 pm

Dear rahzan,

Please read the following article to answer your first two questions. This explains the asymmetric light distribution:

https://www.dmlights.com/blog/interpret ... ion-curve/

If the settings are set to imperial, the results are in foot candle.


Kind regards,
Your DIAL Support Team

rahzan
Posts: 5
Joined: Tue Mar 06, 2018 8:03 pm

Re: asymmetric distribution

Post by rahzan » Thu Mar 08, 2018 11:00 pm

Thanks very much TM.
The article confirm my guess that one is the lateral (0-180) (as one is facing the road fixture),
and the other is back to front 90-270 (as one looks at the side of the luminaire).
However the red curve 0-180 is indeed symmetric in the IES thumbnail but the resulting distribution at the bottom of the page is not symmetric laterally (0-180) yet it should be.
So I must be doing (or interpreting) something trivial, wrong.

I've tried rotating the fixture by 90deg when I import the ies file (the interface asks and there is a checkbox).
I tried to attached the ies but the page gives an ERROR with no description!

Thanks again for your help!

T.Magenheimer
Posts: 1167
Joined: Thu Jul 26, 2012 10:16 am

Re: asymmetric distribution

Post by T.Magenheimer » Mon Mar 12, 2018 12:39 pm

Dear rahzan,

Please send us the problematic .IES file and some explaining screenshots of the error for an analysis of the problem to the mail address 'Support@dial.de'.


Kind regards,
Your DIAL Support Team

rahzan
Posts: 5
Joined: Tue Mar 06, 2018 8:03 pm

Re: asymmetric distribution

Post by rahzan » Mon Mar 12, 2018 8:43 pm

I am still having trouble attaching a file. But I email the ies file as well as the .evo file to Support@dial.de

I look forward to hearing back from you soon.

F.Krewett
Posts: 68
Joined: Mon Jul 06, 2015 2:16 pm

Re: asymmetric distribution

Post by F.Krewett » Wed Mar 14, 2018 5:26 pm

Dear rahzan,

Worldwide there are different regulations how to measure photometry files. Here in Europe it is common to orientate the C0 plane in direction to the street while in US the orientation C0 parallel to the street is more common. In the polar diagram C0-C180 is the red colored curve. In DIALux C0 is displayed as "red line".
90 degree.png
90 degree.png (17.35 KiB) Viewed 1002 times
One software can only support one orientation. DIALux supports the orientation in direction to the street. But to make it possible to import the other orientation as well you can find a 90° rotation in the import assistant. Please try to selelect this option.
C0.png
C0.png (6.82 KiB) Viewed 1002 times
Is the import now successful?

Best regards
Fabian

rahzan
Posts: 5
Joined: Tue Mar 06, 2018 8:03 pm

Re: asymmetric distribution

Post by rahzan » Wed Mar 14, 2018 8:43 pm

Thank you for your response. I have already tried that 90 deg rotation and it would be a good explanation but it does not solve the problem. Note that you can also rotate the POLE and it seems consistent with the rotated fixture at import.
Please see the three trials pictures.

At this point I'm reaching my deadline for submitting the product but I'm totally stuck with this. Any speedy response will be appreciated.
Thanks.
Attachments
dialux lopsided 2.png
dialux lopsided 2.png (86.33 KiB) Viewed 995 times

rahzan
Posts: 5
Joined: Tue Mar 06, 2018 8:03 pm

Re: asymmetric distribution

Post by rahzan » Wed Mar 14, 2018 9:26 pm

I can make it symmetric at pole rotation =45 deg!
I have no idea why!
Attachments
dialux 150W at 45deg.png
dialux 150W at 45deg.png (60.54 KiB) Viewed 995 times

F.Krewett
Posts: 68
Joined: Mon Jul 06, 2015 2:16 pm

Re: asymmetric distribution

Post by F.Krewett » Mon Mar 26, 2018 9:38 am

Dear rahzan,

Please excuse the late reply. L&B keeps us busy.

In our project you have used the correct illumination M-class. For this category is the luminance for the differenet calculation points for an observer in a distance of 60m calculated. Therefore the expected result is not symmetrical.
If you will use e.g. class P4 the illuminance is calculated and the isolines are symmetrical.
P4.png
P4.png (39.22 KiB) Viewed 848 times
Best regasrds
Fabian

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