User's Manual
Table Of Contents
- Table of contents
- 1 Warnings & Cautions
- 2 Notice to user
- 3 Customer help
- 4 Documentation updates
- 5 Important note about this manual
- 6 Parts lists
- 7 Quick Start Guide
- 8 A note about ergonomics
- 9 Camera parts
- 10 Screen elements
- 11 Navigating the menu system
- 12 Connecting external devices and storage media
- 13 Pairing Bluetooth devices
- 14 Configuring Wi-Fi
- 15 Handling the camera
- 16 Working with images
- 17 Working with thermal fusion and picture-in-picture image modes
- 18 Working with measurement tools
- 19 Fetching data from external Extech meters
- 20 Working with isotherms
- 21 Annotating images
- 22 Recording video clips
- 23 Changing settings
- 24 Cleaning the camera
- 25 Technical data
- 26 Dimensional drawings
- 26.1 Camera dimensions, front view (1)
- 26.2 Camera dimensions, front view (2)
- 26.3 Camera dimensions, side view (1)
- 26.4 Camera dimensions, side view (2)
- 26.5 Camera dimensions, 41.3 mm/15° lens, side view
- 26.6 Camera dimensions, 24.6 mm/25° lens, side view
- 26.7 Camera dimensions, 13.1 mm/45° lens, side view
- 26.8 Infrared lens (41.3 mm/15°)
- 26.9 Infrared lens (24.6 mm/25°)
- 26.10 Infrared lens (13.1 mm/45°)
- 26.11 Battery (1)
- 26.12 Battery (2)
- 26.13 Battery charger (1)
- 26.14 Battery charger (2)
- 26.15 Battery charger (3)
- 27 Application examples
- 28 Introduction to building thermography
- 28.1 Disclaimer
- 28.2 Important note
- 28.3 Typical field investigations
- 28.3.1 Guidelines
- 28.3.2 About moisture detection
- 28.3.3 Moisture detection (1): Low-slope commercial roofs
- 28.3.4 Moisture detection (2): Commercial & residential façades
- 28.3.5 Moisture detection (3): Decks & balconies
- 28.3.6 Moisture detection (4): Plumbing breaks & leaks
- 28.3.7 Air infiltration
- 28.3.8 Insulation deficiencies
- 28.4 Theory of building science
- 28.4.1 General information
- 28.4.2 The effects of testing and checking
- 28.4.3 Sources of disruption in thermography
- 28.4.4 Surface temperature and air leaks
- 28.4.5 Measuring conditions & measuring season
- 28.4.6 Interpretation of infrared images
- 28.4.7 Humidity & dew point
- 28.4.8 Excerpt from Technical Note ‘Assessing thermal bridging and insulation continuity’ (UK example)
- 29 Introduction to thermographic inspections of electrical installations
- 29.1 Important note
- 29.2 General information
- 29.3 Measurement technique for thermographic inspection of electrical installations
- 29.4 Reporting
- 29.5 Different types of hot spots in electrical installations
- 29.6 Disturbance factors at thermographic inspection of electrical installations
- 29.7 Practical advice for the thermographer
- 30 About FLIR Systems
- 31 Glossary
- 32 Thermographic measurement techniques
- 33 History of infrared technology
- 34 Theory of thermography
- 35 The measurement formula
- 36 Emissivity tables
28.4.8.4.4 Measuring surface temperature
Measurement of surface temperature is the function of the infrared imaging system.
The trained thermographer will recognise, account for and report on the variation of
emissivity and reflectivity of the surfaces under consideration.
28.4.8.4.5 Measuring area of the defects
Measurement of defect area can be performed by pixel counting in the thermal anal-
ysis software or most spreadhseet packages provided that:
■ the distance from camera to object is accurately measured probably using a laser
measurement system,
■ the target distance should take into account the IFOV of the imaging system,
■ any angular change between the camera and the object surface from the perpen-
dicular is accounted for.
Buildings consist of numerous construction features that are not conducive to quan-
titative surveys including windows, roof lights, luminaries, heat emitters, cooling
equipment, service pipes and electrical conductors. However, the joints and connec-
tions between these objects and the building envelope should be considered as part
of the survey.
28.4.8.5 Conditions and equipment
To achieve best results from a thermal insulation survey it is important to consider
the environmental conditions and to use the most appropriate thermographic technique
for the task.
Thermal anomalies will only present themselves to the thermographer where temper-
ature differences exist and environmental phenomena are accounted for. As a mini-
mum, the following conditions should be complied with:
■ Temperature differences across the building fabric to be greater than 10℃ (18℉).
■ Internal air to ambient air temperature difference to be greater than 5℃ (9℉) for
the last twentyfour hours before survey.
■ External air temperature to be within ±3℃ (±5.4℉) for duration of survey and for
the previous hour.
■ External air temperature to be within ±10℃ (±18℉) for the preceding twentyfour
hours.
In addition, external surveys should also comply with the following:
■ Necessary surfaces free from direct solar radiation and the residual effects of past
solar radiation. This can be checked by comparing the surface temperatures of
opposite sides of the building.
■ No precipitation either just prior to or during the survey.
■ Ensure all building surfaces to be inspected are dry.
Publ. No. T559598 Rev. a554 – ENGLISH (EN) – September 27, 2011 131
28 – Introduction to building thermography