NEN EN 45544-4 : 2016

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Measurement tasks
      4.1 General
      4.2 EN 689 - Workplace atmospheres - Guidance for
                      the assessment of exposure by
                      inhalation to chemical agents for
                      comparison with limit values and
                      measurement strategy
             4.2.1 General
             4.2.2 Occupational exposure assessment
             4.2.3 Periodic measurements
             4.2.4 Reassessment
             4.2.5 Measurement strategy
      4.3 EN 482 - Workplace atmospheres - General
                      requirements for the performance of
                      procedures for the measurement of
                      chemical agents
      4.4 Other measurement tasks
5 Selection of the apparatus
      5.1 General
      5.2 Performance and electrical tests
      5.3 Measurement range and overall uncertainty
             5.3.1 Apparatus conforming to EN 45544-2
             5.3.2 Apparatus conforming to EN 45544-3
      5.4 Selectivity requirements
      5.5 The influence of environmental parameters
      5.6 Time of response and time of recovery
      5.7 Electronic data logging
      5.8 Measurement of combustible gases and vapours
             and oxygen
      5.9 Instruction manual
6 Operating principles and characteristics
      6.1 General
      6.2 Calorimetry (catalytic)
      6.3 Semiconductor (Chemiresistor-metal oxide)
      6.4 Electrochemical
      6.5 Infrared photometry
      6.6 Ultra-violet/visible photometry
      6.7 Flame-ionization
      6.8 Photo-ionization
      6.9 Thermal conductivity (hot wire detector or
             katharometer)
      6.10 Colorimetry
      6.11 Mass spectrometry
      6.12 Electrical conductivity
      6.13 Chemiluminescence
      6.14 Ion mobility spectrometry
      6.15 Potentiometry
      6.16 Electron capture
      6.17 Gas chromatography
7 Operation of personal, portable and transportable
      apparatus
      7.1 General
      7.2 Transportation
      7.3 Storage
      7.4 Field measurements
      7.5 Inspection and field check
8 Operation of fixed apparatus
      8.1 General
      8.2 Installation
      8.3 Location of sensors and sampling points
      8.4 Inspection and field check
             8.4.1 General
             8.4.2 Initial operational control and
                      calibration
             8.4.3 Inspection
9 Maintenance and calibration
10 Warning indicators or alarms
11 Sample lines and sampling probes
12 Sorption/desorption properties of gases and vapours
13 Use of accessories
14 Filters
15 Electrical safety
      15.1 General
      15.2 Explosion protection of electrical equipment
      15.3 Zone classification
16 Disposal of apparatus
17 Training
      17.1 General
      17.2 Operator training
      17.3 Maintenance and calibration training
18 Quality assurance

Provides guidance on the selection, installation, use and maintenance of electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours in workplace atmospheres.