BS EN 999:1998+A1:2008

BS EN 999 has been amended to replace the existing version of the standard.

The protective equipment described in this standard to minimise risk relies on the relevant parts of that equipment being correctly positioned in relation to the danger zone. In deciding on these positions, the following need to be considered:

• The identification of hazards and an assessment of all the risks
• Practical experiences of users including accident statistics and existing national standards
• The state of the art and possible future technical developments
• Type of equipment to be used
• Response times of protective equipment used
• Time taken to ensure the safe condition of the machine following operation of the protective equipment, e.g. to stop the machine
• Bio-mechanical and anthropometric data of body parts
• Path taken by body part when moving from the sensing or actuating means towards the danger zone
• The possible presence of a person between the device and the danger zone
• The possibility of undetected access to the danger zone.

BS EN 999 provides parameters based on values for hand/arm and approach speeds. It also provides a methodology to determine the minimum distances from specific sensing or actuating devices of protective equipment to a danger zone.

BS EN 999 has been revised and now reflects all relevant CEN amendments.

Contents
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Methodology
5 General formula for the calculation of minimum distances
6 Calculation of minimum distances for electro-sensitive protective equipment employing active opto-electronic protective devices
6.1 Direction of approach normal to the detection zone
6.2 Direction of approach parallel to the detection zone
6.3 Direction of approach angled to the detection zone
6.4 Dual position equipment
7 Method of calculating the minimum distances for ground level trip devices
7.1 General method
7.2 Floor mounting
7.3 Step mounting
8 Two-hand control devices
Annex A (informative) Worked examples
Annex B (informative) Walking speeds and stride lengths
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC