CEI EN 60942 : 2004

FOREWORD
INTRODUCTION
1. General
2. Preferred ratings and characteristics
3. TERMS AND DEFINITIONS
4. REFERENCE ENVIRONMENTAL CONDITIONS
5. REQUIREMENTS
6. INSTRUMENT MARKING AND
DOCUMENTATION
Annex A (normative) - PATTERN EVALUATION TESTS
Annex B (normative) - PERIODIC TESTS
Annex C (normative) - FORMAT FOR THE PATTERN
                       EVALUATION REPORT
BIBLIOGRAPHY
Annex ZA (normative) - Normative references to
                       international publications
                       with their corresponding
                       European publications

Describes the performance requirements for three classes of sound calibrator: laboratory standard (class LS), class 1 and class 2. Tolerance limits are smallest for class LS and greatest for class 2 instruments.