Infrared windows

December 5, 2016By Bob BerryGeneral, Training

Infrared windows are often used to allow us to inspect through an opaque solid material. They are made from various materials and are very useful where no other option exists. This blog looks at some of the known issues and is really just my opinion. Choice of material; There are many different materials available, the … Read More

Transmission

November 28, 2016By Bob BerryGeneral, Training

The method of measuring transmissivity here is described in ISO 18434-1. The principle is to use a material of known temperature target object to determine the transmissivity of an unknown material. The test material is placed between the camera and the target object , which should be uniformly heated. The emissivity setting in the camera … Read More

IR Mirrors

November 21, 2016By Bob BerryGeneral, Training

“Are there IR mirrors available?” Answer; Yes IR mirrors are available and can be used for many different purposes. They can be used where a direct line of sight is not available (to help see around a corner with a camera), and they can be used where the cameras is too close to the target … 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

Materials for increasing emissivity

September 16, 2016By Bob BerryGeneral, Training

The materials below are some that I would normally recommend for increasing the emissivity of materials. Scotch 33 Tape Consistent emissivity of 0.95 Glyptal Enamel Paint Electrically insulating paint Dye Penetrant Developer  This is easily applied and removed. It has a very high emissivity Paints, various paints can be used Some deodorants can be used, usually ones with alumina … Read More