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BS EN 50676:2019:2020 Edition

BS EN 50676:2019:2020 Edition

$142.49

Electrical equipment used for detection and concentration measurement of refrigerant gases. Performance requirements and test methods

Published By Publication Date Number of Pages
BSI 2020 24
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This document specifies general requirements for the construction, testing and performance of electrically operated refrigerant fixed gas detection equipment in safety applications. This document does not specify requirements for portable locating leak detectors for refrigerant application as already covered by EN 14624:2012.

This document is applicable to equipment whose primary purpose is to provide an indication, alarm and/or other output function to warn of the presence of refrigerant gases in an industrial or commercial environment and, in some cases, to initiate automatic or manual protective actions. It is applicable to equipment in which the sensor automatically generates an electrical signal when gas is present.

This standard does not apply to gas detection equipment:

  • for non-refrigerant application;

  • used for air pollution monitoring;

  • sampling systems, which are not integral part of the gas detection equipment;

  • open path gas detection;

  • residential applications;

  • process control;

  • for applications in mines;

  • portable locating leak detectors for refrigerant application.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
8 3 Terms and definitions
10 4 General requirements
4.1 Introduction
11 4.2 Construction
4.2.1 General
4.2.2 Measuring ranges and correction factor
4.2.2.1 General
12 4.2.2.2 Selectable range
4.2.3 Alarm signal
4.2.4 Fault signal
4.3 Adjustments
4.4 Gas detection transmitter for use with separate gas detection control units
4.5 Separate gas detection control units for use with gas detection transmitter(s)
4.6 Equipment using software and/or digital technologies
4.7 Labelling and marking
4.7.1 General
4.7.2 Types and electrical protection
4.7.2.1 General
4.7.2.2 Display and other devices for indication of measured values
13 4.7.2.3 Suppression of indication and measured values below zero
4.7.2.4 Indicator light
4.8 Instruction manual
5 Test methods
5.1 Introduction
5.2 General requirements for tests
5.3 Samples and sequence of tests
5.3.1 Test samples
5.3.2 Sequence
5.3.3 Gas detection transmitters
5.3.4 Separate control units
14 5.3.5 Preparation of equipment before each particular test
5.3.6 Mask for calibration and test
5.4 Normal conditions for test
5.4.1 General
5.4.2 Test gas(es)
5.4.3 Standard test gas
5.4.4 Flow rate for test gases
5.4.5 Power supply
5.4.6 Temperature
5.4.7 Pressure
5.4.8 Humidity
5.4.9 Acclimation time
5.4.10 Orientation
5.4.11 Communications options
15 5.4.12 Gas detection equipment as part of systems
5.5 Tests
5.5.1 General
5.5.2 Unpowered storage
5.5.3 Calibration and adjustment
5.5.3.1 Introduction
5.5.3.2 Calibration curve
5.5.3.3 Response to different gases
5.5.4 Stability
5.5.5 Alarm set point(s)
5.5.5.1 General
5.5.5.2 Low voltage and power interruption
5.5.5.3 Field wiring faults
16 5.5.5.4 Sensor disconnection
5.5.5.5 Automatically Aspirated Equipment
5.5.6 Temperature
5.5.7 Pressure
5.5.8 Humidity of test gas
5.5.9 Air velocity
5.5.10 Flow rate for aspirated equipment
5.5.11 Orientation
5.5.12 Vibration
5.5.13 Warm-up time
5.5.14 Time of response
5.5.15 Time of recovery
5.5.16 High gas concentration operation above the measuring range
17 5.5.17 Extended operation in test gas for Type II equipment
5.5.18 Electrical tests
5.5.19 Field calibration kit
5.5.20 Verification of software and digital components
5.5.21 Resistant against poisoning effects to the sensor by the gas to be measure
19 Annex A (normative)Gas specific performance requirements
20 Annex B (normative)Performance requirements under standard test conditions

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BS EN 50676:2019
$142.49