Looks interesting but with some flaws. Here are things that I noticed
The timestamps were incorrect. They didn’t correspond exactly with the clock. It was always some seconds behind with longer runtimes
Once the file is too large the software sometimes crashes
connection with USB cable doesn’t go well sometimes, or on the computer side or on the lux meter side… don’t know
You have to download the latest software from the website. So even if you don’t have the CD, you can still use it.
You can only open the files with the software and then you need to save the runtime graph as a .csv
My copy had trouble with setting the date. Since I wanted every runtime start with 00:00:00 (now I found a better solution though)
You need to select the LUX setting yourself: up to 4000K 40000K or 400000K. This is really annoying since you have to calculate afterwards what the Lumen output was. Each setting needed a different calculation.
Extech SDL400
I replaced the HD450 with the SDL400
I like it much better because it uses an SD card so you can record very large files and you don’t need a useless long piece of USB cable.
Files are XLS so you don’t need to convert and drop it into a spreadsheet
It uses 6AA batteries which I don’t like so much… that’s a lot of batteries. There is an option to use an external 9V power source.
It goes to 100,000 lux instead of the 400,000 of the HD450
Only 1 setting, from 1-100,000 lux. So you only need to calculate it once to convert to Lumens. Unlike the HD450 which you have to calculate based upon the LUX setting it was in.
My original requirements were: (this thread turned in to a list with all kinds of lux loggers, so just to keep this here to understand why this thread went the way it went)
must be standalone (shouldn’t have to be connected to PC or anything)
data should be transferred to PC easily… no strange or unreadable data
USB out for pc connection (preferrably)
able to set time intervals for recording (so the file doesnt end up with millions of data points when doing multi hour runtimes)
Exported file should be readible by non-dedicated software… think about a normal XLS file
Should use batteries… but DC power could be ok
batteries should last long enough for multiple runtimes.
I’ve done some work with 2 of those meters over here.
You are going to be extremely disappointed with them. They are not good as standalone data loggers. When connected to a computer they are actually useful. Assuming you are using my scripts which are much more reliable than the junk that comes on the included CD-ROM.
They don’t need very much of a PC. A cheap raspberry pi or 20 year old desktop is more than enough.
For what you are talking about there is only 1 good option out there: an old android phone running the ceiling bounce app.
My requirements were: (this thread turned in to a list with all kinds of lux loggers)
must be standalone (shouldn't have to be connected to PC or anything)
data should be transferred to PC easily... no strange or unreadable data
USB out for pc connection (preferrably)
able to set time intervals for recording (so the file doesnt end up with millions of data points when doing multi hour runtimes)
Exported file should be readible by non-dedicated software... think about a normal XLS file
Should use batteries... but DC power could be ok
batteries should last long enough for multiple runtimes.
Hmm.
I'd like to keep it extremely simple :) so they won't do it for me then :(
I wanted to use an old Smasung s3 mini, but it didn't work. No lightmeter. So I'll have to look for another one. Probably the best solution! In combo with the app!
Yeah, they basically give them away in hopes you will use their service. I just checked, and there’s a newer upgraded ZTE for $14.95.
They aren’t bad phones if all you want to do is make phone calls, and txt message. In the US, all phones are required to be able to make emergency calls to 911 whether or not you subscribe to a cell service. So these cheap phones are good for emergency use as well
Not sure how good those meters below $50 will work, but here's what I've been using (about $180).
I've been using a Reed Instruments SD-1128SD (Amazon link) for all my runtime graphs. You can view my runtime graphs by clicking on my J5 or SC700d reviews in my signature. It meets all your requirements (except price) - although it has an RS232 connector for hooking up to a computer and would require a USB/RS232 adapter (I've never used or needed that function). Runtime data is copied to an SD card that you simply pull out and plug into your computer for the basic Excel file. Uses six AA batteries, which I've found gives about 3-4 days of runtime on Eneloops, but I also use the optional wall adapter for long tests.
If you order one of those Aliexpress meters, I would like to know how well they work.
This might be a good option, except for the price ;) But I might just get it... the smartphone is hopeless.
Tonight another problem. After waiting 3 hours, I noticed the Ceilingbounce app already stopped after 2 hours :(
My phone probably just turned the app off or something, but this is annoying. I need to log longer runtimes as well.
I have had the same issue with the Android app I use, but it’s just a quick trip over to the Doze settings (or your OEM equivalent) to make sure it doesn’t happen.
App info > Battery > Battery optimisation on stock Android Q.
Finally got myself a second hand Extech HD450 for my runtime graphs. It's not perfect at all, but it will do the job..... I hope..
We'll see how cumbersome this is. It uses a USB Mini (not micro) to connect to a PC. You can either use it as a standalone meter, or connected the the PC. I tried it, connected to the PC, and it seems to be doing the job.... except for the data output.. it adds timestaps like: 2019-09-25 22:10:05. so need to figure out how to make that into clear data... starting from 0 minutes. Instead of the hours of the day.
How about the UI/UX? ughhhh the buttons you have to push and the settings you have to set.. just don't make sense at all.... so completely useless. I prefered having a few extra buttons just to manage these things. A clear Start recording and Stop recording would have helped as well. Can't understand these companies make so horrible UIs.
M. one can also use smartphone as luxmeter logger. there are apps on playstore. they save the data in a common format (csv or similar) and one can postprocess it on the PC or laptop.
Converting a time stamp hh:mm:ss to a counter starting from 0sec is a common task ,
smartphones have brightness sensors. the light meter is an android app. there are plenty of them called 'light meter' or 'lux meter' on google playstore.
smartphone won't die if it's connected to USB charging (powerbank or wall charger).
I've tried it, works well, convenient "UI" and file management. but sure, a physical light meter is the more robust alternative.
Sorry, I meant a light sensor. I also used the Light Meter app with my phone, but needed it to receive calls and messages. A second phone would be as expensive as a second hand /new lux data logger, but with extended battery life.
I could never figure that out either. So . . . . .
In my Reed Instruments, I always zero the hours/minutes/seconds just before I start a runtime graph. I have to do this every time I do a runtime, but it only takes seconds once you figure it out. Excel then accepts this as starting at 12:00am.
The Benetech GM1020 is ok if you master installing the driver (the device apparently uses a fake FTDI chip and needs an old driver) and upload the settings (doing this the first time is tricky). Beware: Windows 10 eliminates your driver in more recent versions, so it has to be reinstalled from time to time. And it’s getting harder each time.
Last time I did this I had to deinstall the Win driver and install the old driver before Windows could find the new, non-working one. Disconnecting from the net might work, too.
I can help if anyone wants to take this route. The GM1020 is the only budget meter able to store that many data points.
Good call Terry, that is a great idea. This is one of the things they could have improved, but on the other hand, most people probably use it for something else, and not for runtime graphs :)
I could find a driver and software online for the Extech, so I think I'm okay.. not sure if something could cause troubles in the future of course.
Thanks Unheard, thanks for sharing. If anybody goes that route, they know what to do.
