Calibration Multigas Detector FD-4S

[@joshmfsanchez]

I have this gas detector it's great, but recently it's been reading around 20.2-20.4 in fresh air, and it takes a little while for it to get to 20.9 if it does. is there a way to calibrate it back to 20.9 o2 without this gas mixture? i'm looking currently and will probably reach out to forensics

[@DrKozForensicsDetectors]

Yes its super easy, you will do everything as shown on this video. So go to Calibration, select O2, then you will just press enter as default is 20.9% for oxygen. Press enter then save and that is it. Keep us posted on your progress. Thank you

[@Thatguy-og8jd]

The CO detector constantly reads 390ppm and when I go to zero it, it says save failed, any ideas?

[@DrKozForensicsDetectors]

please email [e-mail] so we can troubleshoot and follow up on next steps

[@jeremyrodriguez5923]

Our Meter isn't reading EX and CO for some reason. Just stays at zero. What can I do to fix that?

[@DrKozForensicsDetectors]

Email us to diagnose.

[@samoime1955]

if it is supplied by pure nitrogen, why do other gases change? So it appears like other gases are present also.

[@DrKozForensicsDetectors]

IN this video, the gas used is gas MIX, not pure N2, it is a multi gas mixture to calibrate the 4-gas monitor properly. Thank you

[@garryccrn]

The background music is so loud that I could not understand most of the things you are saying Can you record or at list create a print out of step by step procedure. Thanks.

[@DrKozForensicsDetectors]

Thank you for letting me know about the audio issue - you're not the first to mention it and I definitely want my content to be as clear and accessible as possible. I'll make sure to adjust the music levels in future videos.

[@brandonlin1990]

the music makes it really hard to hear you and these detectors are trash. Do not waste your money on this dollar general junk. buy a real detector, especially if your life is depending on it.

[@DrKozForensicsDetectors]

I apologize for the audio issues, that's on me. I'll make sure to fix the sound balance in future videos. As for the detectors, I respectfully disagree with your assessment. These are professional-grade instruments used across industries, not dollar store gadgets. But you're absolutely right that reliability is crucial, especially in life-or-death situations. I encourage everyone to do thorough research and choose a reputable, high-quality detector that meets their specific needs. Safety should always be the top priority.