BS 6809:1987

Method
1. Scope
2. Definition
3. Principle
4. Apparatus
5. Test environment
6. Setting up procedure
7. Calibration
8. Calculation of results
9. Report
Appendices
A. Accuracy of calibration
B. Care of radiometers
C. Guidance notes
D. Suitable apparatus
E. Procedure recommended for maintenance of a
    secondary standard of irradiance at a test
    laboratory
Figures
1. Plan of track arrangement for calibration of
    radiometers showing extent of parallel and
    perpendicular travel
2. Isometric view showing arrangement for calibration
    of radiometers showing extent of parallel and
    perpendicular travel
2. Isometric view showing arrangement of radiometer
    mounting assembly
3. Detail of positioning device for radiometers
4. Side elevation of apparatus showing method of
    positioning radiometers

General calibration procedure and, in appendices, information on accuracy of calibration, care of radiometers and details of a specific suitable apparatus.

This British Standard describes a method for the calibration of radiometers for use in fire testing. This method may be used to calibrate instruments that are used to measure a rate of heat transfer (heat-flux density) due to a combination of radiation and convection (but see Appendix C which gives guidance notes concerning calibration).

This method applies only to instruments having plane receivers and does not apply to receivers in the form of wires, spheres, etc.

Appendix A gives information on the accuracy of the calibration and reference should be made to the standard describing the test for which the radiometer is intended. Appendix B gives guidance on care of radiometers.

NOTE The title of the publication referred to in this standard is given on the inside back cover.