snap & go thermography

November 14, 2016By Bob BerryGeneral

  Thermal camera sales people often advocate the “snap & go” method of thermography. This is where you just take your images in the field and analyze them later. Is this always a good idea?   No, it is not always a good idea. Doing your analysis in the field does slow you down, true, … Read More

Stephan-Boltzman’s law

November 7, 2016By Bob BerryGeneral, Training

      Stephans Boltzmans Law   If Stephan-Boltzman’s Law gives us the total amount of radiation throughout the spectrum, and our camera only works in the LWIR region how can it display the correct temperature?   This is an excellent question.   Firstly, yes Stephan-Boltzmans Law gives us the total radiation throughout the spectrum. … Read More

Flir MSX

October 31, 2016By Bob BerryBuilding thermography, Electrical Thermography, General, Training

MSX   MSX or Multi Spectral Dynamic Imaging is a feature available with selected Flir cameras. I have recently had the opportunity  to try this out in a working environment, and have decided to post my opinion here. I personally have a mixed view about this. On the one hand it is a fantastic feature, and … Read More

Solar Loading

October 3, 2016By Bob BerryBuilding thermography, Electrical Thermography, General, Training

Solar loading I have been asked quite a lot recently about the effect of sunshine in outdoor electrical inspections. Strong sunlight will cause solar loading, this means that the sun will heat the objects that it is shining on. While we don’t normally worry about colour in thermography, colour will strongly affect the amount of … Read More

SAFETY ALERT

September 26, 2016By Bob BerryGeneral

A safety issue has arisen during a thermographic survey of a building. A generator was being used to to provide power for heaters and a blower door, which caused a buildup of carbon monoxide. FYI, please see the safety alert http://www.hsa.ie/eng/Safety_Alerts/2008/Generators_Alert/

Does glass have a high, or low emissivity?

September 19, 2016By Bob BerryGeneral

  I have been asked the following by a student; “Does glass have a high or low emissivity? I always assumed that it was quite low as I can see my own reflection with my camera, but tables show it having a high value, Why?” Answer; Glass has a high emissivity. It is often quoted … Read More