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3.1.47

technical survey

inspection of the premises to be supervised, carried out after the proposal has been accepted, to verify the selection, location and siting of system components and to consider the selection of components in relation to the environmental conditions to which the system components will be exposed

3.1.48

unset

status of an l&HAS or part thereof in which an alarm condition cannot be notified

3.1.49

user

person authorized to operate an l&HAS

3.1.50

unknown alarm

alarm for which the cause cannot be positively identified

3.1.51

unwanted alarm

alarm conditions not generated by an intrusion or attempted intrusion into the supervised premises

3.1.52

warning device

device that gives an audible alarm in response to a notification

NOTE A warning device may also provide alert indications providing such indications are easily distinguishable from an alarm.

3.1.53

wire-free interconnection

interconnection conveying information between l&HAS components without physical media

3.1.54

zone

assessed area of a supervised premises where an intrusion, attempted intrusion, or the triggering of a hold-up device may be detected by an l&HAS

For the purposes of this document, the following abbreviations apply.

ACE Ancillary Control Equipment

APS Alternative Power Source

ARC Alarm Receiving Centre

ATS Alarm Transmission System

CIE Control and Indicating Equipment

HAS Hold-up Alarm System(s)

l&HAS Intrusion and Hold-up Alarm System(s)

IAS Intruder Alarm System(s)

PIR Passive Infra-Red

PS Power Supply

SPT Supervised Premises Transceiver

WD Warning Device

4. Security grade of l&HAS

The security grade of l&HAS will depend upon the performance required as determined during the risk assessment and location survey.

An l&HAS may include l&HAS components of differing grades when divided into clearly defined sub-systems. When l&HAS is divided into sub-systems, each sub-system may be of a different grade. The grade of a sub-system shall be that of the lowest graded component within it.

Components shared by more than one sub-system should have a grade equal to that of the highest sub-system grade, e.g. control and indicating equipment, alarm transmission system, warning devices and power supplies.

EN 50131-1:2006 describes four security grades which should be considered when selecting equipment. These are as follows.

An intruder or robber is expected to have little knowledge of l&HAS and be restricted to a limited range of easily available tools.

An intruder or robber is expected to have a limited knowledge of l&HAS and the use of a general range of tools and portable instruments (e g. a multi-meter).

An intruder or robber is expected to be conversant with l&HAS and have a comprehensive range of tools and portable electronic equipment.

To be used when security takes precedence over all other factors. An intruder or robber is expected to have the ability or resource to plan an intrusion or robbery in detail and have a full range of equipment, including means of substitution of components in an l&HAS.

NOTE In all grades the term “intruder” is intended to embrace other types of threat (e.g. robbery or the threat of physical violence, which might influence the design of an l&HAS).

5. Environmental classification

The environmental class of each system component should be determined by the environmental conditions in which the component is expected to operate.

NOTE 1 Classes I, II, III and IV are progressively more severe and therefore Class IV components may, for example, be used in Class III l&HAS.

NOTE 2 Annex A includes special national conditions for specified countries.

EN 50131-1:2006 defines 4 environmental classes as shown below.

Environmental influences normally experienced indoors when the temperature is well maintained (e.g. in a residential or commercial property).

NOTE Temperatures may be expected to vary between +5 °С and +40 °С.

Environmental influences normally experienced indoors when the temperature is not well maintained (e.g. in corridors, halls or staircases and where condensation can occur on windows and in unheated storage areas or warehouses where heating is intermittent).

NOTE Temperatures may be expected to vary between -10 °С and +40 °С.

Environmental influences normally experienced out of doors when l&HAS components are not fully exposed to the weather or indoors where environmental conditions are extreme.

NOTE Temperatures may be expected to vary between -25 °С and +50 °С.

Environmental influences normally experienced out of doors when l&HAS components are fully exposed to the weather.

6. NOTE Temperatures may be expected to vary between -25 °С and +60 °С.General

l&HAS should be installed, operated (see Clause 12) and maintained in a manner consistent with the manufacturers recommendations for the equipment and the environmental conditions under which l&HAS is expected to operate.

Components of other systems may be combined or integrated with l&HAS providing the performance of l&HAS components are not adversely influenced.

National or European requirements relating to safety may exist. Such requirements are not included in these application guidelines and reference should be made directly to the relevant National or European Standards.

It is recommended that care should be taken by system designers, installation companies, alarm companies and users, to minimize unwanted alarms.

Responsibility for each individual stage in the process of supplying an l&HAS; design, installation, commissioning and hand-over should be clearly defined and agreed between the relevant parties.

Persons responsible for risk assessment and the design, installation planning, system installation, maintenance and repair of l&HAS should hold appropriate qualifications.

NOTE These qualifications required may vary from country to country.

Persons responsible for risk assessment and the design, installation planning, system installation, maintenance and repair of l&HAS should have the necessary training and experience.

Persons responsible for installation planning, system installation, commissioning, maintenance, repair and inspection of l&HAS should have the appropriate tools and test equipment.

Information relating to the design, installation, operation and maintenance of l&HAS should be treated as confidential.

The design of a system should be determined in consultation with the client or specifier of l&HAS (or their representative) and any other interested parties, e.g. insurers or police.

When considered necessary, expert advice should be obtained.

The designer of l&HAS should consider any requirements for third party approval of the whole l&HAS or a particular system component. Any such requirements should be identified at an early stage in the design of l&HAS and the selection of system components.

Care should be taken during the selection of components to ensure all system components are compatible. Where any uncertainty arises the appropriate consultation should take place, e g. with the manufacturer, supplier, a test house or an other third party.

7. System design

The objectives of the system design stage are to determine the extent of l&HAS and select components of the appropriate functionality/performance criteria, grade and environmental classification and to prepare a system design proposal, e g. number and type of detectors and their location.

An assessment of the premises to be supervised should be carried out to determine the required grade of the l&HAS.

The contents at risk within the supervised premises should be considered when determining the design of the l&HAS. Annex В includes a list of examples of factors which should be considered. The list should not be regarded as definitive as other factors may be relevant in specific circumstances.

Among other factors, the construction, location, type of occupancy and theft and robbery history of the supervised premises should be considered when designing an l&HAS. Annex C includes a list of examples of factors which should be considered, the list should not be regarded as definitive as others factors may be relevant in specific circumstances.

The level of supervision required will be influenced by the factors described in Annexes В and C. Based on the assessment of these, the specifier should assess the method of intrusion which may be expected at different points throughout the premises and select the grade of the IAS and design the IAS accordingly. Examples of methods of intrusion to be considered are shown, by grade, in Annex F.

Hold-up devices should only be installed when the need for such devices has been established by a risk assessment, i.e. not installed as “addition” to an IAS.

Consideration should be given to selecting the type of notification appropriate to the risk.

Consideration should be given to the consequences of activation of a WD following the triggering of a hold-up device.

The level of supervision required will be influenced by the factors described in Annexes В and C.

The existing and/or potential conditions at the premises to be supervised should be considered in the design of the l&HAS. Conditions which may influence the operation of l&HAS fall into two categories:

• those conditions occurring within the supervised premises over which the user of l&HAS may be reasonably expected to exercise control. Annex D includes a list of examples of factors which should be considered, the list should not be regarded as definitive as others factors may be relevant in specific circumstances;

• those conditions occurring outside the supervised premises over which the user cannot reasonably be expected to exercise control. Annex E includes a list of examples of factors which should be considered, the list should not be regarded as definitive as other factors may be relevant in specific circumstances.

NOTE The location survey is intended to identify, during the preparation of the system design proposal, factors which may influence the selection and siting of system components, particularly detectors. Additional factors may be identified during the technical survey (see 8.1.3) which may result in amendments to the system design proposal.

A system design proposal should be prepared for submission to the client or an agent appointed by the client. The proposal should include the information detailed in Annex G.

The system design proposal may be subject to alteration at other stages in the implementation of the system, e.g. during the installation planning and installation implementation stages.

Any such changes should be agreed between the relevant parties and the documentation amended accordingly.

Only components meeting the appropriate security grade and environmental class should be selected. Due regard should be taken of the need to minimize the generation of unwanted alarms.

Where standards for a system component do not exist it is permitted to use components not having a grade or class. In such circumstances the grade of the system will be the grade of the lowest graded component.

CIE should be sited within the supervised area. Where an l&HAS is divided into sub-systems of different grades the CIE should be within the area supervised by the sub-system with the highest grade. In grade 3 and 4 l&HAS setting any sub-system(s) should also set the sub-system supervising the area in which the CIE is located. Depending of the type of setting/unsetting the ACE - or parts of the ACE - may be located outside of the supervised area.

Examples of issues to be considered when siting CIE and ACE are shown in Clauses H.21 and H.22.

When unsetting is to be started outside the supervised area and completed inside the supervised area consideration should be given to siting the CIE or ACE adjacent to the final exit point of the supervised area, to limit the route from the point of entry to the CIE or ACE. Care should be taken to site the CIE or ACE so as to prevent observation of the operation of the CIE or ACE by unauthorized persons.

SPT should be sited within the supervised area. Where an l&HAS is divided into sub-systems of different grades the SPT should be within the area supervised by the sub-system with the highest grade. Examples of issues to be considered when siting SPT are shown in Clause H.24

Detectors should be sited in compliance with the manufacturer’s recommendations and to provide the range and coverage determined during the risk assessment stage of l&HAS design. Examples of issues to be considered when siting detectors are shown in Annex H.

Hold-up devices should be sited in compliance with the manufacturer’s recommendations and to provide a high chance to trigger these in a case of hold-up or threat. Examples of issues to be considered when siting hold-up devices are shown in Clause H.20.

WD should be located in positions which are not readily accessible (so as to minimize risk of intentional or unintentional damage) consistent with reasonable access for servicing and so as to give effective notification of alarms.

WD should be so mounted as to minimise the possibility of removal without generating an alarm condition.

Interconnections to externally mounted WD, which are accessible from outside the supervised area, should be provided with suitable tamper protection, e.g. enclosed in metal conduit.

Operation of a warning device may be suppressed in the event of the operation of a hold-up device.

Interconnections appropriate to the system performance required and the environmental conditions should be selected.

Where wired interconnections are used consideration should be given to the relevant electrical installation specifications and to equipment manufacturers recommendations.

When specific wired interconnections are selected these should be run inside the supervised premises. When it is impractical for interconnections to be routed inside the supervised area they should be provided with suitable tamper protection, e g. enclosed in metal conduit.

The size and material of cables used for wired interconnections and its insulation should be such that the voltage delivered to any system component is not less than the minimum specified operating voltage, when measured in the maximum current condition, with the minimum power supply voltage.

All cables used for interconnections should be adequately supported and its installation should conform to good working practices.

Cables should be run in positions where there is the least risk of physical damage. If risk of physical damage exists the cable should be mechanically protected, e g. by ducting, trunking or conduit. When these are made of conductive material due regard should be paid to their proper earthing and correct grounding.

Electrical interference may cause unwanted alarms. This should generally be overcome by filtering the mains input to the IAS, separating interconnecting cables from higher rated voltage and by screening.

Interconnection wiring should not be run in the same conduit or trunking as cables carrying high voltage, e.g. mains supplies, or cables carrying high frequency signals unless they are physically separated and/or suitably screened so as to prevent cross interference.

All joints in interconnection wiring should be mechanically and electrically secure.

To facilitate rapid tracing of faults in interconnecting wiring all cables should be identifiable at their ends. Sufficient test points, contained in junction boxes, should be provided for efficient fault identification, e.g. colour coded insulation, labelled.

Care should be taken with regard to the size and type of cable selected, its routing and fixing. Examples of issues to be considered when specifying specific wired interconnections are included inH.1.1.

When non-specific wired interconnections are selected, in addition to the requirements included in 7.3.3.1 above, consideration should be given to the effect other systems sharing the interconnections may have on the performance of the l&HAS. This issue may be particularly relevant should the other system(s) develop a fault. Examples of issues to be considered when specifying non-specific wired interconnections are included in H.1.2.

When wireless interconnections are selected careful consideration should be given to the influence of intentional or unintentional transmissions using the same frequency and/or means of signal modulation as those of the l&HAS. Such transmissions may result in l&HAS generating tamper or fault conditions or prevent the interconnections functioning correctly. Examples of issues to be considered when specifying wireless interconnections are included in H.1.3.

Care should be taken when selecting the means of setting and unsetting. Whenever possible completion of setting and unsetting should require a deliberate action by the user.

Audible or visual indication should be perceivable to indicate when the setting or unsetting procedure is in progress and/or has been completed.

Setting may be either started within the supervised premises and completed outside the supervised premises or the entire setting procedure may be completed outside the supervised premises, using appropriate ACE. l&HAS should not set until l&HAS is in a normal condition. l&HAS may allow certain limited conditions preventing setting to be overridden.

In case the setting is started within the supervised premises and completed outside the supervised premises, such completion should be performed e.g. by locking the entry/exit point door, and signal of such locking is transmitted to CIE (e.g. mechanical switch operated by the latch of the lock).

NOTE EN 50131-1:2006, 8.3.6, includes requirements relating to overriding certain conditions and EN 50131-1:2006, 8.3.10 & 8.3.11, permit the inhibiting and isolation of function respectively.

When setting is started within the supervised premises and is to be completed outside the supervised premises, a maximum time should be permitted to complete the setting procedure. When the maximum setting period is exceeded an indication should be provided.

When setting is started within the supervised premises and completed outside the supervised premises an indication should be perceivable when the setting procedure is started and when setting is completed. This indication should be time limited.

When setting of l&HAS is to be performed entirely outside the supervised premises an indication should be perceivable when l&HAS is set. This indication should be time limited.

Unsetting may be either started outside the supervised premises and completed within the supervised premises or may be performed entirely outside the supervised premises using ACE.

Consideration should be given to preventing physical access to the supervised premises, via the entry/exit point, until either the entry procedure has been started or l&HAS has been unset.

When unsetting is started outside the supervised premises and completed inside the supervised premises an indication should be provided when the unsetting procedure is started and when unsetting is completed, When unsetting of l&HAS is to be performed entirely outside the supervised premises an indication should be provided when l&HAS is unset. This indication should be time limited.