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BS 8243:2021

BS 8243:2021

$167.15

Design, installation and configuration of intruder and hold-up alarm systems designed to generate confirmed alarm conditions. Code of practice

Published By Publication Date Number of Pages
BSI 2021 38
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This British Standard gives recommendations for the design, installation and configuration of intruder and hold‑up alarm systems (I&HAS) that incorporate alarm confirmation technology, where such I&HAS have signalling systems that signal to an alarm receiving centre (ARC) and require a police response.

It includes recommendations intended to minimize the likelihood of false alarms.

NOTE 1 Hold-up alarm system (HAS) alarm confirmation can be used as required in the NPCC and ACPOS/PS security systems policies [1] [2].

NOTE 2 Confirmation of a hold-up alarm (HUA) might be required to regain police response only where the URN (unique reference number) has been withdrawn following false alarms. See the NPCC and ACPOS/PS policies [1] [2].

PDF Catalog

PDF Pages PDF Title
4 Foreword
7 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
11 4 Primary design and configuration objectives
4.1 Design objectives
12 4.2 Alarm confirmation technology
4.3 Transmission fault signals handled by the ARC
13 4.4 Informing the ARC of changes in police response
5 Design, installation and configuration of I&HAS incorporating alarm confirmation technology
5.1 General
14 5.2 Design and configuration of sequential confirmation I&HAS
15 5.3 Design and configuration of audio confirmation I&HAS
16 5.4 Design and configuration of visual confirmation I&HAS
5.5 Confirmation of HAS using ARC telephone call back
6 Minimizing false alarms generated by the I&HAS
6.1 General
17 6.2 Alarm filtering at an ARC
6.3 Methods of completion of setting
18 6.4 Methods of unsetting
22 Annex A (normative)  Operational recommendations for products used for confirmed systems
28 Annex B (informative)  ARC alarm handling procedure for alarm signals associated with transmission fault signals
Figure B.1 — Example of alarm handling procedure for alarm signals associated with transmission fault signals
29 Annex C (informative)  ARC procedures for handling two transmission fault signals
Figure C.1 — Example of procedure for handling two transmission fault signals
30 Annex D (normative)  Information to be included in the system design proposal and as-fitted document
32 Annex E (informative)  Operational requirements for an I&HAS equipped with sequential confirmation technology
Figure E.1 — Example of operational requirements for an I&HAS equipped with sequential confirmation technology
33 Annex F (informative)  ARC processing of confirmed alarms
34 Annex G (informative)  Timing diagrams where sequential confirmation is utilized
Figure G.1 — Entry timeout before expiry of minimum 30 s operation of indicator or WD
35 Figure G.2 — Entry timeout after expiry of minimum 30 s operation indicator or WD
Figure G.3 — Entry timeout before expiry of minimum 30 s operation of indicator or WD (second detector before end of 30 s delay)
36 Figure G.4 — Intruder alarm before entry and detector of the entry route during entry
37 Bibliography

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BS 8243:2021
$167.15