Alarms Doctor

Q: Why is a radio distance site test prior to install so important?

A: Because of the nature of radio waves, radio distance on any particular site cannot be guaranteed. The construction of some buildings or even Mother Nature may reduce the radio signals to a point where they cannot be received reliably, or perhaps not received at all. Test equipment is available to carry out this function depending on the proposed equipment, as with some systems the receiver itself, or panel, can have a signal strength meter built in.

Q: Why not grade 3 wirefree?

A: At the present time, wire-free detectors do not have an anti-mask capability, which means that wire-free systems with a radio PIR will only comply with Grade 2.

Q:What is the difference between the radio Classes and radio Grades?

A: The radio Classes (Class 3, Class 6, etc) refer to the old BS6799 standard. Wirefree systems must now conform to the same requirements as those for hardwired systems within EN50131.

Q: Should I start looking at wirefree systems as alternatives to wired, as this will reduce installation times, lifting boards, etc?

A: The situation will determine which system to use, for example wireless systems can offer an alternative to hard wire systems when it is not possible to run cables due to building construction or décor restrictions, as long as a site test is done prior to install.

Q: Can wireless detectors be added on to wired panels to create a mixed system?

A: We can supply "hybrid" systems, which can use a mixture of wired and wirefree detectors currently compliant to PD6662 Grade 2. We can also supply "generic" receivers, which can be added on to wired panels to convert hardwired zones into wirefree.