RayTek ThermoView Ti30 user manual Reflected Temperature Compensation

Page 50

furnaces, or other heat sources) have a temperature much higher than that of the target. In these situations it is necessary to compensate for the reflected energy from those objects.

Note: The Reflected Temperature Compensation (RTC) feature is disabled if the emissivity is set to 1.00.

To set or change the RTC feature, complete the following steps:

1.You will need an infrared reflector. Take a piece of aluminum foil. Crumple and re- flatten the foil and put it on a cardboard plate, shiny side up.

2.Put the ThermoView Ti30 imager in regular Measurement mode.

3.Press the MODE button once. At this point you will be able to adjust Emissivity.

4.Set the Emissivity value to 1.00.

5.Position the imager at the selected measurement distance from the target to be measured. Aim and focus the unit on the target.

6.Now, place the infrared reflector in the field-of-view of imager. Position the reflector in front of and parallel to the target surface.

7.Measure the apparent surface temperature of the surface of the reflector. This temperature is the reflected temperature of the target. Make a note of this temperature value.

8.It is a good idea to repeat the steps from 5 to 7 and then average the results. Make a note of the average.

9.Press the MODE button one more time. At this point you will be able to adjust the RTC value.

10.Enter the value found on step 8 for RTC, by pressing the Up and Down buttons.

11.To enable the RTC, make sure the set the Emissivity properly, according to the object material. If set at 1.00, the RTC compensation won’t take place.

Figure 31. Reflected Temperature Compensation

July 1, 2003

- 50 -

Version 1.0

i

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

i

Image 50

Contents ThermoView Ti30 User’s ManualContents Qualitative and Quantitative Temperature Measurements Appendix B Infrared Theory Q&A Glossary Warranty Information Customer Service Contact Information Introduction Quick Specifications Table NetdUnpacking Your New Imager Removing the Battery Pack First, the BatteriesBattery Packs Charging the Rechargeable Battery Pack Normal Charge CycleDocking Station LED Indicators Getting Started Attaching the Wrist StrapTurning the Unit On Displaying ImagesInformation Screen Normal Mode Settings and Controls KeypadThermoView Imager Settings Switches icons not shown ThermoView Imager Settings Switches Laser On/Off Toggle ButtonJapanese Laser Aperture and Optical ChannelMeasurement Mode Switch LCD Backlight Illumination SwitchPalette Switch Centigrade/Fahrenheit Toggle ButtonAutomatic Semi Automatic Gain and Level ThumbwheelsFocus Wheel Level pointTrigger Location of the Focus WheelMan Machine Interface Flow Charts Main LoopImage Recording Procedure Emissivity Adjustment Procedure July 1 Version Quick Image Fix Procedure Array Recalibration Procedure Recording an ImageRetrieve Mode Retrieving an ImageInstalling the Software Downloading and Looking at ImagesConnecting the Docking Station to Your Computer Hooking Up the Docking StationConnecting the USB Connector to the USB Port InsideIR Main Screen at Program Launch Downloading Images Sync buttonSaving Images Download Data ScreenSetting the Imager Clock Contents of Images FolderJuly 1 Version Field USB Port Looking at Your Downloaded ImagesViewing Thumbnail Images Viewing a Single Image Importance of Focusing Obtaining the Best ImageSelecting the Measurement Mode Selecting the Color PaletteLevelGain Min Level Gain Max Level Gain Tip Qualitative and Quantitative Temperature Measurements Distance to Target Spot RatioDS ratio D / S = Optical DiagramField-of-View Ambient Temperatures Environmental ConditionsReflected Temperature Compensation EmissivityReflected Temperature Compensation Organizing Your Data File ManagementUploading Data to the Imager Uploading Data to Your ThermoView Ti30 ImagerEditing Data Before Upload RTC OFF Scale Limits Analyzing Your DataSingle Image Screen Sample Image at Original Scale Limits Sample Image at Original Isotherm Setting IsothermsTemperature Table Tab Additional Image Analysis ToolsTemperature Table Profile TabHistogram Tab Profile TabMenu Bar New FolderFahrenheit ThermoView Imager InfoExit CelsiusCreate Report Export Temperature TableExport Image HistogramCascade Copy Profile ChartContents Tile HorizontalReporting Your Findings Thermographic ReportImager Accuracy Chart Appendix a Technical ReferenceImager Reading Error vs Source DS Typical Emissivity ValuesAluminum Unoxidized Ni-Cu Gob How does IR work? Why use noncontact infrared thermometers?Appendix B Infrared Theory Q&A How to assure accurate temperature measurement? EmissivityDistance to spot ratio Field-of-viewHow to take temperature measurement? What are the most popular applications?Glossary Calibration Background TemperatureBlackbody Calibration SourceEMI/RFI Noise Display ResolutionDrift Far FieldFull Scale Accuracy Focus Point or DistanceFull Scale Gray BodyMicron or µm LaserLoop Minimum spot sizeOptical Pyrometer Optical ResolutionNon-Gray Body Pyroelectric DetectorRelative Humidity Reflected Temperature CompensationResolution RepeatabilityTemperature Coefficient or Ambient Derating Storage Temperature RangeTemperature Spectral ResponseTime Constant Temperature ResolutionThermal Shock Transfer Standard