DD243 Documentation

DD243 : 2002

The ACPO Security Systems Policy 2000 left the professional alarm installer with a lot to think about. The eagerly awaited DD243:2002 document has clarified for installers how the ACPO policy can be complied with in practice, but has also raised many questions of it's own.

This simple guide is intended to provide assistance to any company looking for straight forward solutions to this complex issue. The statements made and solutions offered are purely written as the opinions of Pyronix Limited. This guide should be read in conjunction with the DD243:2002 document and should not be considered a commentary of, or a replacement to, the DD243 document itself. Whilst the policy allows for confirmation using Visual, Audio or Sequential techniques this guide will focus purely on the issues raised when using sequential confirmation technology. It is anticipated that sequential confirmation will be the most common approach used but that at the same time this will be the technique that raises the most questions!

DD243:2002 to DD243:2004 SUMMARY OF CHANGES
Clause	Change	Notes
4.2	Emphasises that ALL systems should incorporate sequential confirmation technology.
4.3	Confirmation including one or more transmission path faults must now occur within maximum of 96 hours (still within a single set period).Additional guidance notes for installer.
Original clause split into two:
New 5.4.2: Applicable specifically to use of movement detectors with overlapping areas of coverage. "Located some distance apart" has been adjusted to "normally located with housings at least 2.5 metres apart"
5.4.2	New 5.4.3: Applicable specifically to use of movement detectors with non-overlapping areas of coverage. Permits two detectors to be mounted in the same housings, provided that this is declared at installation, and included on application for URN.	So that police can force a system change if these detectors cause FAs.
5.4.3	Original clause now 5.4.4
5.4.4	Original clause now 5.4.5
6.3	Reference to "other means when using EN50131" has been removed.
General clause about unsetting amplified.
6.4.1	Now specifically mentions the use of external ACE for unsetting.Requires that application of force to external ACE cannot initiate change of status of IAS
6.4.2	Adjusted so that permits additional methods of ensuring that IAS is unset before entry is possible.
6.4.3	Adjusted so that permits additional methods of ensuring that confirmation is disabled before entry is possible.
6.4.4	Option remains, with additional notes for guidance of installer.
6.4.5	Method unchanged. Includes concession to use of PIN code for unsetting after expiry of entry time, and mentions use of external ACE (with PACE only). Includes scenario where unconfirmed alarm takes place BEFORE start of entry time."Zone Omit Rearm" must now be advised to keyholder.	6.4.2 / 3/ 4 are "preferred" methods. 6.4.5 carries warnings.
6.4.6	Additional notes for guidance of installer.
7.1	If sounds are inconclusive, ARC must NOT consider it confirmed. Rather, wait for additional information.
7.2	If images are inconclusive, ARC must NOT consider it confirmed. Rather, wait for additional information.
A.3.1	Clarifies that, for EN50131 event logging purposes, each "confirmation period" is treated as a separate "set" period.
A.3.2	Additional note re: advice to keyholder of zones isolated by ARC.