RayTek ThermoView Ti30 Appendix B Infrared Theory Q&A, Why use noncontact infrared thermometers?

Page 71

Appendix B – Infrared Theory Q&A

Q. Why use noncontact infrared thermometers?

A. Noncontact infrared (IR) thermometers use infrared technology to quickly and conveniently measure the surface temperature of objects. They provide fast temperature readings without physically touching the object. The temperature is shown on the LCD display.

Lightweight, compact, and easy-to-use, IR thermometers and thermal imagers can safely measure hot, hazardous, or hard-to-reach surfaces without contaminating or damaging the object. Also, infrared thermometers can provide several readings per second, as compared to contact methods where each measurement can take several minutes.

Q. How does IR work?

A. IR thermometers capture the invisible infrared energy naturally emitted from all objects. Infrared radiation is part of the electromagnetic spectrum, which includes radio waves, microwaves, visible light, ultraviolet, gamma, and X-rays.

Infrared falls between the visible light of the spectrum and radio waves. Infrared wavelengths are usually expressed in microns with the infrared spectrum extending from 0.7 microns to 1000 microns. In practice, the 0.7 to 14 micron band is used for IR temperature measurement.

July 1, 2003

- 71 -

Version 1.0

i

Tel: (01943) 602001- WWW.ISSLTD.CO.UK - Fax: (01943) 816796

i

Image 71

Contents User’s Manual ThermoView Ti30Contents Qualitative and Quantitative Temperature Measurements Appendix B Infrared Theory Q&A Glossary Warranty Information Customer Service Contact Information Introduction Netd Quick Specifications TableUnpacking Your New Imager First, the Batteries Removing the Battery PackBattery Packs Normal Charge Cycle Charging the Rechargeable Battery PackDocking Station LED Indicators Attaching the Wrist Strap Getting StartedDisplaying Images Turning the Unit OnInformation Screen Normal Mode Keypad Settings and ControlsThermoView Imager Settings Switches icons not shown Laser On/Off Toggle Button ThermoView Imager Settings SwitchesLaser Aperture and Optical Channel JapaneseCentigrade/Fahrenheit Toggle Button LCD Backlight Illumination SwitchPalette Switch Measurement Mode SwitchLevel point Gain and Level ThumbwheelsFocus Wheel Automatic Semi AutomaticLocation of the Focus Wheel TriggerMain Loop Man Machine Interface Flow ChartsImage Recording Procedure Emissivity Adjustment Procedure July 1 Version Recording an Image Quick Image Fix Procedure Array Recalibration ProcedureRetrieving an Image Retrieve ModeDownloading and Looking at Images Installing the SoftwareHooking Up the Docking Station Connecting the Docking Station to Your ComputerConnecting the USB Connector to the USB Port InsideIR Main Screen at Program Launch Sync button Downloading ImagesDownload Data Screen Saving ImagesContents of Images Folder Setting the Imager ClockJuly 1 Version Looking at Your Downloaded Images Field USB PortViewing Thumbnail Images Viewing a Single Image Obtaining the Best Image Importance of FocusingSelecting the Color Palette Selecting the Measurement ModeLevelGain Min Level Gain Max Level Gain Tip Distance to Target Spot Ratio Qualitative and Quantitative Temperature MeasurementsDS ratio D / S = Optical DiagramField-of-View Environmental Conditions Ambient TemperaturesEmissivity Reflected Temperature CompensationReflected Temperature Compensation File Management Organizing Your DataUploading Data to Your ThermoView Ti30 Imager Uploading Data to the ImagerEditing Data Before Upload RTC OFF Scale Limits Analyzing Your DataSingle Image Screen Sample Image at Original Scale Limits Isotherms Sample Image at Original Isotherm SettingAdditional Image Analysis Tools Temperature Table TabProfile Tab Temperature TableProfile Tab Histogram TabNew Folder Menu BarCelsius ThermoView Imager InfoExit FahrenheitHistogram Export Temperature TableExport Image Create ReportTile Horizontal Copy Profile ChartContents CascadeThermographic Report Reporting Your FindingsAppendix a Technical Reference Imager Accuracy ChartTypical Emissivity Values Imager Reading Error vs Source DSAluminum Unoxidized Ni-Cu Gob How does IR work? Why use noncontact infrared thermometers?Appendix B Infrared Theory Q&A Emissivity How to assure accurate temperature measurement?Field-of-view Distance to spot ratioWhat are the most popular applications? How to take temperature measurement?Glossary Calibration Source Background TemperatureBlackbody CalibrationFar Field Display ResolutionDrift EMI/RFI NoiseGray Body Focus Point or DistanceFull Scale Full Scale AccuracyMinimum spot size LaserLoop Micron or µmPyroelectric Detector Optical ResolutionNon-Gray Body Optical PyrometerRepeatability Reflected Temperature CompensationResolution Relative HumiditySpectral Response Storage Temperature RangeTemperature Temperature Coefficient or Ambient DeratingTransfer Standard Temperature ResolutionThermal Shock Time Constant