GB 4716-2024 Point type heat fire detectors
Point type heat fire detectors
1 Scope
This document defines the terms and definitions of point type heat fire detectors (hereinafter referred to as the "detectors"), specifies their classification, requirements, inspection rules, markings, and instructions for use, and also describes the corresponding test methods.
This document is applicable to the design, manufacture and inspection of point type heat fire detector products used in industrial and civil buildings.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 4715 Point-type smoke detectors using scattered light, transmitted light or ionization
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB 12978 Rules for test of fire electronic products
GB 15631 Special type fire detectors
GB/T 16838 Environmental test and severities for fire electronic products
GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Part 3: Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
typical application temperature
ambient temperature at which a point type heat fire detector is capable of operating stably for a long period of time under its monitoring condition
3.2
maximum application temperature
ambient temperature at which a point type heat fire detector is capable of operating stably for a short period of time under its monitoring condition
3.3
static response temperature
temperature at which a point type heat fire detector is capable of sending out a fire alarm signal when the temperature raises at an extremely small rate
3.4
resettable detector
detector that is capable of returning from an alarm condition to the monitoring condition without the need for component replacement following a response and upon cessation of the condition triggering the response
3.5
non-resettable detector
detector that is incapable of returning to its monitoring condition following a response
4 Classification
Point type heat fire detectors shall conform to one or more of the categories among A1, A2, B, C, D, E, F, and G listed in Table 1. S-type or R-type detectors may be designated by appending the respective letter S or R to the aforementioned category symbols (e.g., A1S, BR, etc.). For detectors with field-settable categories, the category shall be denoted by the letter P in the product marking, with all settable categories (e.g., A1R, BR, BS, etc.) indicated, and the currently set category shall be clearly identifiable.
Note 1: S-type detectors do not send out a fire alarm signal until the minimum static response temperature is attained, even at higher temperature rise rates.
Note 2: R-type detectors have a differential temperature characteristic that allows them to meet the response time requirements when the temperature rises at high rates, even from a temperature below the typical application temperature.
Table 1 Detector classification
Contents
Foreword III
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Requirements
5.1 General requirements
5.2 Appearance requirements
5.3 Performance of main components (parts)
5.4 Control software requirements
5.5 Response orientation performance
5.6 Static response temperature performance
5.7 Response time performance
5.8 Response time performance from 25°C
5.9 High temperature response performance
5.10 Power supply parameter fluctuation performance
5.11 Response time performance before environmental test
5.12 High temperature (durability) performance
5.13 Climatic environmental tolerance
5.14 Mechanical environmental tolerance
5.15 Electromagnetic compatibility
5.16 Drop resistance
5.17 Additional performance of S-type detectors
5.18 Additional performance of R-type detectors
5.19 Composite detection
6 Tests
6.1 General
6.2 Appearance
6.3 Main components (devices)
6.4 Control software
6.5 Marking and instructions for use
6.6 Orientation test
6.7 Static response temperature test
6.8 Response time test
6.9 Response time test from 25°C
6.10 High temperature response test
6.11 Power supply parameter fluctuation test
6.12 Response time test before environmental test
6.13 High temperature (durability) test
6.14 Low temperature (operation) test
6.15 Cyclic damp heat (operation) test
6.16 Steady-state damp-heat (durability) test
6.17 Sulfur dioxide (SO2) corrosion (durability) test
6.18 Impact (operation) test
6.19 Impact test
6.20 Vibration (sinusoidal) (operation) test
6.21 Vibration (sinusoidal) (durability) test
6.22 Electrostatic discharge immunity test
6.23 Radiated, radio-frequency, electromagnetic field immunity test
6.24 Test for immunity to conducted disturbances, induced by radio-frequency fields
6.25 Electrical fast transient/burst immunity test
6.26 Surge immunity test
6.27 Drop test
6.28 Additional tests for S-type detectors
6.29 Additional tests for R-type detectors
7 Inspection rules
7.1 End-of-manufacturing inspection
7.2 Type inspection
8 Marking
8.1 Product marking
8.2 Quality inspection marking
8.3 Durability of marking
9 Instructions for use
Annex A (Normative) Standard incubator
Annex B (Normative) Drop test device
