JJF 1450-2014Program of Pattern Evaluation of Portable Induction Anemometer (English PDF)

1 Scope (1)

2 References (1)

3 Overview (1)

4 Legal management requirements (1)

5 Measurement requirements (2)

6 General Requirements (2)

7 Type evaluation item list (3)

8 Pilot projects test methods and conditions (4)

9 Type evaluation results to determine (9)

Appendix A portable magnetic induction wind anemometer type evaluation original record format (10)

B portable magnetic induction wind anemometer measurement error calculation appendix (15) Appendix C portable magnetic induction wind anemometer measurement equipment manufacturing license examination prerequisites (16)

Introduction

JJF 1016 "Measuring Instruments type evaluation outline guidelines for the preparation", JJF 1015 "Measuring Instruments type evaluation and type Ratify general specification ", JJF 1246" measurement equipment manufacturing license evaluation general specification ", JJF 1001" universal cytometry Language and Definitions "and JJF 1059" Evaluation and Expression of Uncertainty in Measurement "together constitute the fundamental norm-setting series specification.

The specification for the specific test methods and technical indicators refinement, additions and modifications.

This specification is the first release.

Portable magnetic induction wind anemometer type evaluation outline

1 Scope

This type of evaluation framework applies to portable magnetic induction wind anemometer (hereinafter referred to as magnetic induction wind meter) of pattern evaluation.

2. References

JJG515-1987 portable magnetic induction wind anemometer (Trial) JJG431-1986 DEM6 type light wind anemometer cups those documents by reference the terms of this syllabus constitute provisions of this outline. For dated references, all subsequent amendments (not including errata content) or revisions do not apply in this outline, however, encourage the all parties that this outline agreement to use the latest versions of these documents. For undated reference documents Member, the latest versions apply to this outline.

3 Overview

Magnetic induction wind meter is a measure of the instantaneous wind direction and speed instruments, mainly for field observation, by the anemometer and wind direction table composition. The key member includes a wind vane and wind cups.

Vane by wind vane shaft is rotated around to drive the wind direction pointer on the compass direction. Wind cup Wind cup shaft is rotated around by wind, driven by the wind cup shaft lower end of the magnet is rotated to form a rotating magnetic field around the magnet the induction coil generates eddy currents in a changing magnetic field. Induction coil under the action of the electromagnetic force, the magnet rotates along the square to deflect. Induction coil deflected to a certain angle after reaching the torque balance and gossamer. Winds pointer The induction line Deflection angle in the circle indicates the wind speed wind speed dial.

4 legal management requirements 4.1 units of measurement Magnetic induction wind table should respectively "m/s" and "(°)" as wind speed and direction units.

4.2 The maximum permissible error Wind direction magnetic induction meter maximum permissible error of ± 22.5 °, wind speed maximum permissible error of ± (0.5m/s 0.05v).

Note. v standard wind speed, m/s.

4.3 legal metrology marking and measuring instruments logo 4.3.1 legal metrology flags include the following.

--- Measurement equipment manufacturing license logo and number (test prototype should stay out of the corresponding position);

--- Induction wind flags and table type approval number (test prototype should stay out of the corresponding position; this entry is not mandatory provisions set);

--- Product certification (with magnetic induction wind provided separately from the main unit).

4.3.2 measuring instruments identified include the following.

--- Name induction wind table specification (model);