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optris BR 400 Operator's Manual

Calibration source
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Operator's Manual
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BR 400
Calibration source

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Summary of Contents for optris BR 400

  • Page 1 Operator's Manual ® optris BR 400 Calibration 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.de Internet: www.optris.de...

  • Page 3: Table Of Contents

    Table of Contents Table of Contents Table of Contents ............................. 3 General Information ..........................6 Description ............................6 Warranty ............................7 Scope of supply ..........................8 Maintenance ............................. 8 Specification ............................. 9 General Specification ........................9 Electrical Specification ........................9 Controller Specification (preset) .......................
  • Page 4 Control Elements ..........................11 Switch On ............................13 Setup of the Set Point Value ......................13 Lock of Programming Keys ......................13 Advices for Operation ........................14 Circuit Diagram ............................15 Troubleshooting ............................. 16 Basics of Infrared Thermometry......................17 Emissivity ............................... 18 Definition............................
  • Page 5 Table of Contents ITS-90 ............................. 23 Calibration Geometry ........................24 Calibration ............................27 Appendix A – Declaration of Conformity ..................... 29 Appendix B – Literature ..........................30...

  • Page 6: General Information

    ® Thank you for choosing the optris BR 400 calibration source. The BR 400 is a rugged calibration source and can be used for calibration and check up of infrared thermometers. It contains of three main components:  Radiation surface ...

  • Page 7: Warranty

    Read the manual carefully before the initial start-up. The producer reserves the right to change the herein described specifications in case of technical advance of the product. The optris® BR 400 is not suitable for continuous operation (max. 8-10 h/day). Long-term operation at T = 400 °...

  • Page 8: Scope Of Supply

    1.3 Scope of supply  BR 400 calibration source  Operators manual  Test log (according DIN VDE 0702)  Calibration certificate You will find the serial number on the unit. Always use this number when you contact the customer service concerning maintenance, additional order of components, spare parts or repairs.

  • Page 9: Specification

    Specification 2 Specification 2.1 General Specification Ambient temperature: 0...50 °C (during operation) Weight: 4,5 kg Dimensions: 325 mm x 230 mm x 230 mm 2.2 Electrical Specification Temperature sensor: Pt100 Controller: Power supply: 230 V AC (± 10 %), 50 Hz Power consumption: max.

  • Page 10: Measurement Specification

    For IR thermometers with a spectral sensitivity of 8-14 µm and an emission factor between 0,9 and 1,0. For an exactly determination of the radiation temperature of the calibration source we recommend the use of a reference IR thermometer (e.g. optris LS DCI). ►8 Calibration of Infrared Thermometers [1] [2]...

  • Page 11: Operation

    3 Operation 3.1 Installation You can position the BR 400 on a laboratory bench or any other suitable flat and stable surface. Please take care in any case that the BR 400 is positioned horizontal! Connect the unit to the 230 V mains using the supplied cable.
  • Page 12 PID-controller (front side) Upper display (PV) Lower display (SV) LED for auto adjust LED for lower alarm output LED for upper alarm output LED for heating Function key Down key Up key Back side Power socket Fuse 5 A Main switch...

  • Page 13: Switch On

    40 minutes (from 25 °C to 400 °C). 3.5 Lock of Programming Keys With this function you can lock the programming keys on the controller of the BR 400 to avoid a non authorized change of parameters on the unit.

  • Page 14: Advices For Operation

    Before you switch off the BR 400, please setup the set point to 0 °C. After the black body temperature is below 200 °C [upper display – PV] you can turn off the main switch on the back side.

  • Page 15: Circuit Diagram

    Circuit Diagram 4 Circuit Diagram...

  • Page 16: Troubleshooting

    Black body is not heating although properly setup Set point value lower than current temperature ® In case of problems or questions, which may arise when you use the optris BR 400, please contact our service department. The customer service staff will support you with questions concerning the optimization of the work with the calibration source, calibration procedures or with repairs.

  • Page 17: Basics Of Infrared Thermometry

    Basics of Infrared Thermometry 6 Basics of Infrared Thermometry Depending on the temperature each object emits a certain amount of infrared radiation. A change in the temperature of the object is accompanied by a change in the intensity of the radiation. For the measurement of “thermal radiation”...

  • Page 18: Emissivity

    7 Emissivity 7.1 Definition The intensity of infrared radiation, which is emitted by each body, depends on the temperature as well as on the radiation features of the surface material of the measuring object. The emissivity (ε – Epsilon) is used as a material constant factor to describe the ability of the body to emit infrared energy.

  • Page 19: Characteristic Emissivities

    Emissivity and take the temperature of the sticker. Afterwards, determine the temperature of the adjacent area on the measuring object and adjust the emissivity according to the value of the temperature of the sticker. ► Cove a part of the surface of the measuring object with a black, flat paint with an emissivity of 0,98. Adjust the emissivity of your infrared thermometer to 0,98 and take the temperature of the colored surface.

  • Page 20: Calibration Of Infrared Thermometers [1] [2]

    8 Calibration of Infrared Thermometers [1] [2] In this chapter the general procedure and important relationships for the calibration of infrared thermometers are explained. For a detailed description of the different calibration methods and a detailed uncertainty consideration we recommend the standard VDI/ VDE 3511 part 4.3 Calibration of radiation thermometers. Infrared thermometers are calibrated with the help of reference radiation sources, so called black bodies.
  • Page 21 Calibration of Infrared Thermometers [1] [2] For the initial factory calibration Optris is defining the calibration temperatures in a way that all constants can be determined with the best possible accuracy. For a re-calibration by the user or a local calibration...

  • Page 22: Transfer Standard

    Reference IR thermometer LS-DCI Certificate of calibration for LS-DCI The LS-DCI is a reference IR thermometer which is based on the portable IR thermometer series optris LS. The units are produced with pre-selected components supporting a high stability of measurement. In combination with a dedicated calibration at several points the LS-DCI achieves a higher accuracy than units out of the series production and is therefore qualified to be used as dedicated calibration instrument (DCI).

  • Page 23: Its-90

    Calibration of Infrared Thermometers [1] [2] 8.2 ITS-90 The 1990 International Temperature Scale (ITS-90) prescribes a system of measurement devices and methods that ensure a uniform temperature measurement worldwide. The ITS-90 is a very good approximation of the thermodynamic temperature. It is based on 17 well reproducible fixed points like melting points of highly pure metals.

  • Page 24: Calibration Geometry

    Schematic layout of heat pipes used at the PTB: sodium and caesium heat pipes (a) / water and ammonia heat pipes (b) [3] 8.3 Calibration Geometry The optics of an IR thermometer is described by the distance to spot ratio (D:S). Depending on the quality of the optics a certain amount of radiation is also received from outside the specified measurement spot.
  • Page 25 Calibration of Infrared Thermometers [1] [2] Diameter of the effective area of the reference radiation source Measurement spot of the IR thermometer at distance a Measurement distance Calibration geometry Example: Calibration geometry of the optris CT LT02 on a BR 400 source...
  • Page 26 Calibration geometries for Optris IR thermometers (selection – the complete list can be ordered)

  • Page 27: Calibration

    Calibration of Infrared Thermometers [1] [2] Automated calibration stations at Optris GmbH 8.4 Calibration The basic requirements for a calibration laboratory are:  Laboratory room with stable temperature and humidity  Measurement equipment for air temperature and humidity  Reference radiation source ...
  • Page 28 Calibration procedure: 1. Checking the optics of the LS-PTB/ LS-DCI and of the test unit – cleaning, if necessary 2. Switch on both units; consider warm-up time 3. Set the emissivity value to 1,00 on both units, if possible 4. Set the reference radiation source to a temperature which is significantly different to the internal temperature of the LS- PTB/ LS-DCI;...

  • Page 29: Appendix A - Declaration Of Conformity

    Appendix A – Declaration of Conformity Appendix A – Declaration of Conformity...

  • Page 30: Appendix B - Literature

    Appendix B – Literature [1] VDI/ VDE Standard: Temperature measurement in industry – Specification for radiation thermometers, 2001, VDI/ VDE 3511, Part 4.1 [2] VDI/ VDE Standard: Temperature measurement in industry, Radiation thermometry – Calibration of radiation thermometers, 2004, VDI/ VDE 3511, Part 4.3 [3] Jörg Hollandt, Rüdiger Friedrich, Berndt Gutschwager, Dieter R Taubert, Jürgen Hartmann –...

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