BSI 19/30396990 DC:2019 Edition
$13.70
BS EN IEC 62990-3. Workplace atmospheres – Part 3. Gas detectors. Electrical apparatus for the detection and measurement of oxygen. Performance requirements and test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 41 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | FOREWORD |
| 8 | INTRODUCTION 1 Scope |
| 9 | 2 Normative references 3 Terms and definitions 3.1 Gas properties |
| 10 | 3.2 Types of equipment |
| 11 | 3.3 Sensors |
| 12 | 3.4 Supply of gas to equipment 3.5 Signals and alarms |
| 13 | 3.6 Times |
| 14 | 3.7 Miscellaneous 4 General requirements 4.1 Introduction 4.2 Design 4.2.1 General |
| 15 | 4.2.2 Indicating devices 4.2.2.1 Indicators 4.2.2.2 Display and other outputs for indication of measured values 4.2.2.3 Suppression of indication and measured values below zero 4.2.2.3.1 General 4.2.2.3.2 Type IN equipment |
| 16 | 4.2.2.3.3 Type DE equipment 4.2.2.4 Indicator light 4.2.3 Alarm signals 4.2.3.1 Alarm settings 4.2.3.2 Alarm output functions 4.2.4 Fault signal |
| 17 | 4.2.5 Adjustments 4.2.6 Battery-powered equipment 4.2.7 Gas detection transmitter for use with separate gas detection control units 4.2.8 Separate gas detection control units for use with gas detection transmitter(s) |
| 18 | 4.2.9 Software-controlled equipment 4.2.9.1 General 4.2.9.2 Conversion errors 4.2.9.3 Special state indication 4.2.9.4 Software 4.2.9.5 Data transmission 4.2.9.6 Self-test routines |
| 19 | 4.2.9.7 Functional concept 4.3 Labelling and marking 4.4 Instruction manual |
| 21 | 5 Test methods 5.1 General |
| 22 | 5.2 General requirements for tests 5.2.1 Samples and sequence of tests 5.2.1.1 Test samples 5.2.1.2 Sequence 5.2.1.3 Gas detection transmitters 5.2.1.4 Separate gas detection control units 5.2.2 Preparation of equipment before testing |
| 23 | 5.2.3 Mask for calibration and test 5.3 Normal conditions for test 5.3.1 General 5.3.2 Test gas(es) |
| 24 | 5.3.3 Flow rate for test gases 5.3.4 Power supply 5.3.5 Temperature 5.3.6 Pressure 5.3.7 Humidity 5.3.8 Acclimation time |
| 25 | 5.3.9 Orientation 5.3.10 Communications options 5.3.11 Gas detection systems 5.4 Test methods and performance requirements 5.4.1 General 5.4.2 Unpowered storage |
| 26 | 5.4.3 Calibration curve and repeatability 5.4.3.1 Calibration curve 5.4.3.2 Repeatability 5.4.4 Stability 5.4.4.1 Battery-powered equipment 5.4.4.2 Fixed and transportable equipment 5.4.4.3 Portable equipment |
| 27 | 5.4.5 Alarm set point(s) 5.4.5.1 General 5.4.5.2 Increasing oxygen concentration (Type DE equipment only) 5.4.5.3 Increasing oxygen concentration (Type IN equipment only) 5.4.5.4 Decreasing oxygen concentration (Type DE equipment only) 5.4.6 Temperature |
| 28 | 5.4.7 Pressure 5.4.8 Humidity of test gas |
| 29 | 5.4.9 Air velocity 5.4.10 Flow rate |
| 30 | 5.4.11 Orientation 5.4.11.1 Portable equipment 5.4.11.2 Fixed and transportable equipment 5.4.12 Vibration 5.4.12.1 Test equipment 5.4.12.2 Procedures 5.4.12.2.1 General |
| 31 | 5.4.12.2.2 Procedure 1 5.4.12.2.3 Procedure 2 5.4.13 Drop test |
| 32 | 5.4.14 Warm-up time 5.4.15 Time of response |
| 33 | 5.4.16 Battery capacity 5.4.17 Power supply variations |
| 34 | 5.4.18 Electromagnetic compatibility (EMC) 5.4.18.1 Performance criteria 5.4.18.2 Test |
| 35 | 5.4.18.3 Test of DC Input Power Ports 5.4.19 Addition of sampling probe 5.4.20 Poisons and other gases 5.4.20.1 General 5.4.20.2 Equipment with electrochemical sensors |
| 36 | 5.4.20.3 Equipment with zirconium dioxide (ZrO2) sensors 5.4.21 Field verification kit 5.4.22 Operation above and below the measuring range 5.4.22.1 Gas concentrations above the upper limit of the measuring range 5.4.22.1.1 Type DE equipment 5.4.22.1.2 Type IN equipment 5.4.22.2 Operation at or below the lower limit of the measuring range (Type IN equipment only) |
| 37 | 5.4.23 Fault signal tests 5.4.23.1 General 5.4.23.2 Low voltage and power interruption 5.4.23.3 Field wiring faults 5.4.23.4 Digital communication fault 5.4.23.5 Measured values below zero (Type IN equipment only) 5.4.23.5.1 General 5.4.23.5.2 Procedure 1 |
| 38 | 5.4.23.5.3 Procedure 2 5.4.23.6 Sensor disconnection 5.4.23.7 Automatically Aspirated Equipment 5.4.24 Verification of software and digital components |
| 39 | Annex A (informative) Determination of time of response and time of recovery A.1 Aspirated equipment A.1.1 Test rig A.1.2 Equipment without internal pump A.1.3 Equipment with internal pump |
| 40 | A.2 Equipment that samples by diffusion A.2.1 Calibration mask method A.2.2 Diffusion or flow methods |
