NBN EN 27726 : 1994

Cooperating organizations
National foreword
Foreword
Specification
0. Introduction
1. Scope and field of application
2. Reference
3. General
4. Specifications relating to the measuring instruments
5. Specifications relating to measuring methods
Annexes
A. Measurement of air temperature
B. Measurement of the mean radiant temperature
C. Measurement of radiant temperature asymmetry
D. Measurement of the absolute humidity of the air
E. Measurement of air velocity
ZA. (normative) Normative references to international
     publications with their relevant European publications
Tables
1. Main independent quantities involved in the analysis
     of a thermal environment
2. Characteristics of measuring instruments
3. Standard environmental conditions for the determination
     of time constants of sensors
4. Measuring positions for the physical quantities of an
     environment
5. Projected area factors
6. Wet thermometer - Length of thermometer covered by the
     wet wick
Figures
1. Mean value of angle factor between a seated person
     and a vertical rectangle (above or below his centre)
     when the person is rotated around a vertical axis
2. Mean value of angle factor between a seated person
     and a horizontal rectangle (on the ceiling or on
     the floor) when the person is rotated around a
     vertical axis
3. Mean value of angle factor between a standing person
     and a vertical rectangle (above or below his centre)
     when the person is rotated around a vertical axis
4. Mean value of angle factor between a standing person
     and a horizontal rectangle (on the ceiling or on the
     floor) when the person is rotated around a vertical
     axis
5. Analytical formula relating to the calculation of
     the shape factor in the case of a small plane element
     perpendicular to a rectangular surface
6. Analytical formula relating to the calculation of
     the shape factor in the case of a small plan element
     parallel to a rectangular surface
7. Chart for the calculation of the shape factor in the
     case of a small plane element perpendicular to a
     rectangular surface
8. Chart for the calculation of the shape factor in the
     case of a small plane element parallel to a
     rectangular surface
9. Psychrometric chart - Example of the determination
     of the absolute humidity of the air
10. Principle of operation of a psychrometer
11. Saturated water vapour pressure above water and above
     a standard lithium chloride solution, as a function
     of the temperature
12. Range of measurement of absolute humidity for lithium
     chloride hygrometers
13. Diagram of the principle of a lithium chloride humidity
     detector
14. Hot bulb anemometer - Example showing the effect of the
     direction of movement of the air on the measurement of
     air velocity
15. Hot wire anemometer - Example showing the effect of the
     direction of movement of the air on the measurement of
     the air velocity
National annexes
NA. (informative) Committees responsible
NB. (informative) Cross-reference

Specifies the minimum characteristics of appliances for measuring physical quantities characterising an environment as well as the methods for measuring the physical quantities of this environment. Also gives detailed tables, diagrams and annexes.