# calibration calibration

Author Comment Last activity Moderation
alejobonifacio "Hi @warren! Yes, 0.1-1 g/L is a useful range at least in rivers in this part of the world, in fact for this river test it worked well. I still have..." | Read more » 3 months ago
liz "Thank you for this close and careful work <3 " | Read more » 3 months ago
warren "Hi @alejobonifacio i wonder if there is an 'ideal' range if we can use resistors or capacitor sizes to shift that to our looked-for "search range" ..." | Read more » 3 months ago
warren "Also noting this page with good notes on blue filters: https://publiclab.org/questions/patalbright/10-20-2020/how-to-find-the-sweet-spot-for-manual..." | Read more » 4 months ago
PeterBella "@fongvania @stevie Thank you for the EPA Colocation Instruction Guide slide deck. @TravisLondon The info linked above in the slide deck does a grea..." | Read more » 7 months ago
stevie "Great info! thank you! " | Read more » 7 months ago
fongvania "From this Guidebook for Developing a Community Air Monitoring Network: If possible, permanently install a community monitor at the colocation site..." | Read more » 7 months ago
eustatic "I think it all depends on the sampling rate and whether the data converge, ha. For electronic monitors sampling every few seconds, two weeks isn't..." | Read more » 7 months ago
Ag8n "We were in an medical environment, usually class 100,000. These instruments are different from the ones used by public lab, but based on the same ..." | Read more » 7 months ago
Luniversdelalicorne "totally agree " | Read more » 12 months ago
Ag8n "A possible light source for a spectrometer--the light on the cell phone. But what is the spectrum like? I didn't know. Here is an answer from qu..." | Read more » 12 months ago
Ag8n "Look up didymium glass filters,PNB586 or BG20. That will be a start. Usually, if you find a good vendor, they will have a copy of the UV/Vis spec..." | Read more » 12 months ago
Ag8n "One of the alternate calibration methods, posted on a different thread, was to use photographic filters that were made of didymium. It sounds like..." | Read more » 12 months ago
dcanprdn "R G B colored low-price lasers are everywhere ??!!! Ebay, Aliexpress etc ADP " | Read more » 12 months ago
dcanprdn "Why not use low price R G B office laser pointers for visible light calibration ? ADP " | Read more » 12 months ago
Ag8n "Sorry, got a phone call. The same line listed for this spectrometer should be usable for the spectrum lab instrumenent. The lines are only listed..." | Read more » over 1 year ago
Ag8n "Checked on amazon. Found three spectrometers, similar in function to the spectrum lab. They are priced at $7,$9, and $37. The$37 is the best. I..." | Read more » over 1 year ago
givemehits "ok " | Read more » over 1 year ago
warren "Can you link us to the calibrated spectrum you're referring to? You can calibrate both from the Capture interface and from the Analysis page (where..." | Read more » over 1 year ago
stef "select the spectrum to be calibrated in SW click on copy calibration, put in the number of the spectrum to copy. that should do it. Stef " | Read more » over 1 year ago
amerikangold "Correct ! " | Read more » over 1 year ago
Ag8n "Or of holmium chloride solution, for that matter. Probably the solution would work better, but there would be done handling issues. " | Read more » over 1 year ago
Ag8n "Thanks for the alternate source of didymium glass. Do you know of any less expensive sources of holmium oxide glass? Thank you. " | Read more » over 1 year ago