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Summary of Contents for optris BR 20AR
- Page 1 Operators Manual BR 20AR Ambient temperature reference source...
- Page 2 Optris GmbH Ferdinand-Buisson-Str. 14 13127 Berlin Germany Tel.: +49 30 500 197-0 Fax: +49 30 500 197-10 E-mail: info@optris.global Internet: www.optris.global...
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Page 3: Table Of Contents
Table of contents Table of contents Table of contents ............................3 General notes ............................5 Intended use ..........................5 Warranty ............................6 Scope of supply ..........................6 Technical Data .............................7 BR 20AR ............................7 Installation ............................10 Hardware installation ........................10 Configuration ..........................17 Accessories..........................22... - Page 4 Fever Detection ..........................23 Crowd based screening ......................23 Individual screening ........................23 Absolute temperature measurement accuracy ................24 Deployment of an IR camera for best results ................25 Influences on external skin temperatures ................... 26...
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Page 5: General Notes
® Thank you for choosing the optris BR 20AR reference source. The BR 20AR is a rugged reference source and ideally suited for referencing thermal imaging cameras. It contains two main components: Radiation surface Temperature probe (16-bit digital temperature sensor with 0.1 °C accuracy) The radiation surface is made of aluminium with a special thermal conductivity and has shaped grooves. -
Page 6: Warranty
If the failure results from misuse or neglect the user has to pay for the repair. In that case you may ask for a cost estimate beforehand. 1.3 Scope of supply BR 20AR radiator Mounting bracket 20 m cable with PIF connector... -
Page 7: Technical Data
Digital 16-bit temperature sensor ± 0.1 °C (25…50 °C), drift: 0,0073 °C Accuracy of temperature probe 30…40 °C) Accuracy of PI 450i with BR 20AR ± 0.5 °C (T 18 °C…33 °C) Interface 5-pin connector fitting to PIF connector of PI 450i cameras... - Page 8 Figure 1: Dimensions [mm], ceiling mounting...
- Page 9 Technical Data Figure 2: Dimensions [mm], wall mounting...
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Page 10: Installation
3 Installation 3.1 Hardware installation A possible configuration of the BR 20AR is shown in Figure 4. The optris PI 450i T010 camera is connected via USB to the computer. The included 20 m cable has to be connected to the PIF connector on the camera back side (see Figure 3). - Page 11 Installation Figure 4: System overview with PI 450i camera...
- Page 12 The BR 20 radiator can be mounted either on a ceiling or on a wall. An advantage of the radiator is its size. This means that it can be set up at almost any distance from the camera and the object to be measured. It is only important that the reference measuring area has a minimum size of 8x8 pixels and that the radiator is within the field of view of the camera.
- Page 13 Installation For optimal temperature measurement of the skin, the area of the medial canthus is recommended (Figure 6). At this point there is a very good correlation to the body core temperature. Figure 6: Medial canthus In Figure 7 the face of a person was measured with an infrared camera.
- Page 14 The temperature distribution in the face is in this example between 31 °C and 35.1 °C (Figure 8). The size of the canthus approximately assumed to be 15x15 mm. Figure 8: Temperature distribution face To achieve the minimum temperature accuracy requirement, there must be at least 3x3 pixels within the Canthus region (15x15 mm).
- Page 15 Installation O18, 382 x 288 px Distance Field of view: Pixel inside canthus Depth of field: DOF [m] HFOV [m] (15x15 mm) for 3x3 px 12 x 12 6 x 6 3 x 3 34.0 O29, 382 x 288 px Distance Field of view: Pixel inside canthus...
- Page 16 O80, 382 x 288 px Distance Field of view: Pixel inside canthus Depth of field: DOF [m] HFOV [m] (15x15 mm) for 3x3 px 15 x 15 8 x 8 4 x 4 infinite The following table shows the recommended installation area. Recommended working range for Recommended working range for reference [m] Lens...
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Page 17: Configuration
Installation 3.2 Configuration After having connected your Hardware, you can start with the configuration in the PIX Connect software. To do this, go to the Referencing tab under Tools and Configuration. Under Reference temperature and Source, select External probe. Now select under Compare with measuring area the measuring area that should correspond to the reference area. - Page 18 Figure 10: Example layout in PIX Connect – Fever Inspection with Ref To make a correct temperature measurement on the human face make sure that glasses of the persons are removed and that the eyes are inside the measuring area.
- Page 19 The “Fever Inspection with Ref” layout consists of two measuring areas. The first measuring area is the so-called "reference source", which must be placed on the BR 20AR radiator. It is important to cover a large area as possible, but not the edges (see Figure 11).
- Page 20 In the snapshot history, all alarm cases are stored and can be analyzed more precisely. A snapshot is taken for each alarm condition. For this purpose, Snapshot on alarm selection must be activated under Alarm configuration in the Alarms tab. Figure 13: Configuration –...
- Page 21 Installation The settings for the different color palettes can be found in the configuration under the Measuring colors tab. Several color palettes can be defined here. In this layout the color palette Gray was used to achieve a good contrast to the critical areas. Between a temperature of 30-36 °C the color palette Iron Hi is used.
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Page 22: Accessories
Figure 18: PIF Splitter – Dimensions [mm] The splitter is only working for one BR 20AR and one PIF. The use of two PIFs at the same time is not possible. The connection to the splitter can be chosen freely. -
Page 23: Fever Detection
Fever Detection 4 Fever Detection There are essentially two different methods for detecting possible persons for fever with a thermal imaging camera: Individual screening or Crowd based screening. The most suitable method depends on various factors (such as the installation location). 4.1 Crowd based screening The IR camera is monitoring a crowd of people at once or sequential. -
Page 24: Absolute Temperature Measurement Accuracy
The BR 20AR ambient referencing source can be combined with the PI 450i T010 camera. The black body is equipped with a 16 bit digital temperature sensor with ±0.1 °C accuracy. By integrating this highly accurate reference signal to PIX Connect software, the camera uncertainties can be reduced resulting from device adjustment, ambient temperature drift and short term stability down to a system accuracy of ±0.5 °C with a... -
Page 25: Deployment Of An Ir Camera For Best Results
Use a camera with a spatial resolution of 382 x 288 pixels or better and with a NETD of 80 mK or better. Select the right optics using the Optris calculator. Check the Field of View (FOV) and Measurement Field of View (MFOV) which defines the smallest spot size that can be measured accurately. ... -
Page 26: Influences On External Skin Temperatures
The accuracy of the measurement can be increased to ±0.5 °C by using the optional BR 20AR ambient reference black body. Eyewear and sunglasses are opaque in the 8-14 μm infrared spectral range. Therefore they should be removed before the individual screening. Contact lenses need not be removed as these do not cover the tear duct. - Page 27 Fever Detection Influences from extremes in ambient temperature such as a long walk through a cold parking lot will impact measurements possibly masking a fever and reporting a false negative reading. It is important to note that temperatures made on the outside of the body (even at the Medial Canthus) will not match core temperatures taken with a traditional oral thermometer.
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