A reading was taken with the temperature on an antenna I was testing, the temperature gun uses an InfraRed thermometer. I would get temperatures in upwards of 280 degrees farenheight while transmiting, and temperatures of around 110 degrees farenheight while not transmitting (wich was normal). Does anyone have a theory for why this would happen?
2007-08-21 08:02:23 · 2 answers · asked by Manuel P 2 in Science & Mathematics ➔ Engineering
if the infrared detector is an LED type device, it is a diode and will rectify RF energy picked up by the units wiring and generate a spurious DC current.
2007-08-21 08:13:24 · answer #1 · answered by lare 7 · 1⤊ 0⤋
Yes, I have seen this myself, working around 100W amplifiers at 1-2 GHz. I have also seen cheap voltmeters affected by the RF energy. What I would do is turn off the RF and quickly measure the temperatuer.
Maybe you can shield the detector with foil, especially if its battery operated.
2007-08-21 20:44:24 · answer #2 · answered by Anonymous · 1⤊ 0⤋