BEMS

What happens to the alarm during a power cut?
Do I need a sensor in every room?
How often does the battery need replacing?
Do I need a phone line for monitoring?
What causes my alarm to false activate?
Is it easy to change my Monitoring response when I go on holiday?
Can I change my own code?
Can pets cause the alarm to trigger?

Bytové jednotky

What is the difference between analogue & IP systems?
What does CCTV stand for?
Advantages of Analog systems over IP systems
Advantages of IP systems over Analog systems
Is it best to install dome cameras or full-body cameras?
How do I view my cameras remotely?
Do cameras need lighting to see?
How do I keep my cameras recording during a mains failure?

HVAC

Postup montáže klimatizácie?
Čo je to split?
What happens if a Proximity card is lost or stolen?


BEMS

What happens to the alarm during a power cut?

Alarm systems are fitted with batteries which can keep the system running for up to 24 hours during a mains failure. During a power cut the keypad will beep and the mains light will flash to indicate a problem. If the system is monitored a signal will be sent to monitoring which will notify them of a mains failure. If the alarm is set it will remain set, if it is unset it will remain unset. If the battery is flat or faulty the system will down-power. A PIN code may be required on mains restore. Fortunately the programming and codes will still be kept in the memory.

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Do I need a sensor in every room?

Not necessarily, although a sensor is recommended in a room which has:

  • Anything of high value such as a laptop, television, etc.
  • An easy access or escape such as doors, windows, balcony or fire escape
  • A history of attempted break-ins

Usually, rooms which have no entry or exit route or no high value assets such as kitchens, bathrooms, meeting rooms, conference rooms etc do not require a sensor. On the other hand, areas which are extremely vulnerable or have high value assets may need two sensors of different technology, such as Glassbreak detector/Vibration sensor plus a PIR detector. This way an alarm is generated before entry has been gained.

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How often does the battery need replacing?

As a precaution, it is recommended that batteries are replaced every 3 years, however, depending on the type of battery and frequency of power cuts, batteries can last from anywhere between 2 – 9 years. It is recommended that your security system is maintained on an annual basis to ensure the system is operational and the battery is healthy.

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Do I need a phone line for monitoring?

If you already have a phone line then this can be used. It is not uncommon to share the line with a fax or an existing phone. If you do not have a line you can have your alarm monitored using a cellular dialer. There is an initial installation cost involved plus monthly communications charges, however, in the long run cellular dialers are more cost effective than a dedicated phone line.

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What causes my alarm to false activate?

False alarms are usually caused by PIR’s detecting heat movement from something other than people, such as:

  • Insects or spiders: If they walk close enough to the lens, the PIR will activate, some are even found inside the detector. The best way to minimise this is to keep the PIR clean and free of cobwebs.
  • Pets: If you are leaving your pets in the house when you arm the alarm you must ensure that Pet-Immune PIR’s are installed.
  • Direct sunlight: PIR detectors must be positioned away from direct sunlight during installation.
  • Open fireplaces: Heat can be generated from open fires long after the fire has been extinguished. PIR detectors must be positioned away from open fires during installation.
  • Harsh environments: Rooms such as workshops, warehouses or garages can attract drafts which can cause standard PIR’s to false activate. Dual-technology (PIR and Microwave) detectors are recommended in harsh environments, where heat movement of a solid object is required to cause the sensor to trigger.

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Is it easy to change my Monitoring response when I go on holiday?

Just a simple phone call or email to us is all it takes. In addition, Fortress Monitoring customers can login to their Monitoring account, where logs can be viewed and response plans can be updated either permanently or temporarily at the click of a button.

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Can I change my own code?

Yes, the installer will demonstrate how to do this when the system is installed. You will also be given a user-friendly manual which clearly outlines the procedure .

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Can pets cause the alarm to trigger?

Yes they can… if you have pets we will design the system using Pet-immune detectors – these are immune to pets for a weight of up to 45KG’s. This means you can leave your pets indoors while the system is armed.

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CCTV

What is the difference between analogue & IP systems?

Analogue and IP cameras are similar in many ways; in both technologies the lens projects the image to the analogue image sensor where the signal is then converted to digital using an analogue-to-digital converter. The signal is then processed by the camera’s on-board digital circuitry (DSP). In IP cameras the video is compressed and encoded internally then sent to the Network Video Recorder (NVR) via IP protocol. In an analogue camera the signal is converted back to analogue and sent to theDigital Video Recorder (DVR) where it is compressed and encoded.


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What does CCTV stand for?

CCTV stands for Closed Circuit Television. It is a television system that operates on a “closed loop” basis. Unlike broadcast television, which is available to anyone with a suitable reciever, CCTV pictures are only available to those connected to the loop.

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Advantages of Analog systems over IP systems:

  1. Analog systems are cheaper than IP systems - IP cameras can be up to 3 times more expensive than their analogue equivalent.Digital Video Recorders (DVR’)s are cheaper than Network Video Recorders ( NVR’s) and power supplies are cheaper than Power Over Ethernet (POE) switches. Generally there’s less hardware used on an analogue system. Analogue systems are also less labour-intensive, are easy to install and require little to no network and configuration skills.

  2. Analogue cameras cope with low-light and varying light conditions better than IP cameras - Wide Dynamic Range (WDR) cameras have superior image quality in varying light levels and compensates for bright background and low light conditions producing clearer images with greater contrast. To date, WDR technology has not been applied to any high definition megapixel IP cameras.

  3. IR (Infra-Red) technology is unavailable in IP cameras - IR cameras have built-in IR illuminators which allow the camera to see in zero lux or complete darkness. As IR cameras draw more current than standard cameras, the load is usually too great for an IP camera which draws its power from the network switch. Standalone IR illuminators have to be installed separately for IP cameras.

  4. Real-time images can be viewed from analogue systems - As the image from an analogue camera is compressed at the DVR, the image can be viewed live from the camera with no latency. IP cameras have latency and “lag” for up to two seconds which can lead to over-correction issues if an operator needs to track something from a PTZ camera.

  5. Cable distances to Analogue cameras can be greater - Using active Baluns on Cat5E cabling, the video signal can be transmitted up to 2 kilometers to the DVR. IP camera cable distances are restricted by structured cabling regulations which limit the cable distance to 100 metres between the camera and the network switch.

  6. Analogue video signals are more reliable - Analogue video traffic is not subject to any networking issues or risks such as bandwidth limitations, network congestion, varying bit rates, large file sizes, viruses and latency. Once installed, the analogue systems are very reliable and require little maintenance.

  7. Analogue systems are compatible with any brand of camera - Any analogue camera can plug into any DVR. IP systems use NVR’s which need the correct protocol installed to communicate with each camera. Different brands of NVR and camera may not be compatible with each other and may not be able to communicate.

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Advantages of IP systems over Analog systems:

  1. IP systems have superior image quality - IP cameras can deliver high definition images of up to 8megapixels in resolution, compared to a maximum of 650TVLine (equivalent to 0.4 megapixel) in analogue cameras.

  2. IP systems can use the existing network infrastructure - Unlike analogue cameras, IP cameras don’t have to be wired back directly to the recording device, they can be wired to the nearest network hub or switch and the existing network infrastructure can be used to carry video signals to the NVR, eliminating the need for un-necessary wiring.

  3. IP systems have superior wireless capabilities - IP cameras have the flexibility to integrate with a wireless network and are virtually unlimited in terms of expansion. Analogue wireless cameras use radio frequencies and are limited to about sixteen cameras before they reach full capacity.

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Is it best to install dome cameras or full-body cameras?

Dome cameras are becoming increasingly popular and many customers and security companies are opting to install dome cameras instead of full body cameras. It may be said that full body cameras offer more of a deterrent as they are usually more visible than dome cameras; on the other hand, dome cameras can be favorable as they are more discreet and aesthetically pleasing. Dome cameras can also be more cost effective, as all of the components such as the camera, lens and housing are manufactured in one product. The Field of view in dome cameras is often unknown and the public are usually unaware of which area they cover. Full body cameras are more prone to vandalism or theft and can be tampered with easily; they can be pointed in another direction or removed using a rope.

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How do I view my cameras remotely?

By connecting your DVR to your home broadband or office network it is possible to view your cameras from virtually anywhere, as long as there’s a broadband connection or mobile phone signal. You can even view your cameras from your Smart phone such as iPhone or windows Mobile.
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Do cameras need lighting to see?

It is always best to ensure the camera field of view is adequately lit, however, with the introduction of Infra-Red (IR), lighting is not essential. Many cameras now have built-in IR illuminators which claim to produce effective images in zero light conditions for distances up to 50metres.

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How do I keep my cameras recording during a mains failure?

An Uninterruptable Power Supply (UPS) can be in installed as part of your CCTV system’s hardware. A UPS is basically a battery backup and is a cost-effective way of ensuring your CCTV system has enough power to keep running in the event of a power cut. A UPS Also acts as a surge protection unit and regulates the supply to the equipment, reducing the risk of damage from electrical surges or spikes.

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HVAC


Postup montáže klimatizácie


Mnohí domáci majstri si myslia, že namontovať klimatizáciu je hračka a podľa pár prečítaných článkov na internete sa do toho pustia na vlastnú päsť. Na našej stránke si môžete pozrieť, čo všetko montáž klimatizácie obnáša http://www.dobraklima.sk/montaz-klimatizacie. S trochou optimizmu im treba veriť že to zvládnu sami, aj keď v mnohých prípadoch je výsledok montáže skôr neuspokojivý a napokon zavolajú na pomoc montéra. Potom je druhá skupina, ktorá montáž klimatizácie radšej zverí do rúk montérovi – odborníkovi, pretože zastáva názor, že montáž je odborná záležitosť. Však posúďte sami – znalosti z chladiarenstva, znalosti termodynamiky a k tomu aj logické myslenie naozaj nemá každý. Vyspovedali sme za vás skúseného montéra, ktorý si želal ostať v anonymite, a dal nám za pravdu, že často krát sú ľudia prekvapení, čo sa u nich doma robí.

Začneme pekne od začiatku – je vždy potrebná prehliadka miesta montáže?

Určite áno, ja chodím osobne k zákazníkom domov, aby som si mohol zamerať trasy a určiť aký materiál si mám na montáž doniesť. Niekedy postačujú aj dobre nafotené fotky miestnosti, kde chce klient namontovať klimatizáciu a jej rozmery.

Čo z takej prehliadky viete zistiť?

Základná vec je dohodnúť sa s klientom, kde si želá vnútornú a vonkajšiu jednotku umiestniť. Ľudia si často určia sami, kam chcú klímu namontovať, ale nie vždy si zvolia správne miesto na stene. Vtedy sa im snažím vysvetliť, že je potrebné umiestniť to tak, aby vzduch v miestnosti cirkuloval. Musím si tiež zistiť kde sa bude klimatizácia napájať na zdroj energie, teda ako ďaleko je zásuvka. Ďalšia dôležitá vec je určiť kde bude odvod vody, teda kam sa bude odvádzať kondenz. V panelových domoch môže kondenz stekať z vonkajšej jednotky voľne po stene z paneláku alebo si ľudia nechávajú vedierko na balkóne, ktoré pravidelne vyprázdňujú.

Koľko času zaberá montáž klimatizácie a musí byť klient pri samotnej montáži?

Montáž klasického MONOSPLITU, teda jednej vnútornej a jednej vonkajšej jednotky, mi zaberá tak 3-4 hodinky. Ľudia sú rôzni – niektorí chcú byť pri montáži prítomní, zaujímajú sa o každý krok čo robím a iným stačí, keď sú doma, ale v inej miestnosti. Nemám problém ani s jedným ani s druhým postojom.

Zatiaľ sa rozprávame o montáži klimatizácie v panelákoch, tak mi napadá otázka, či je samotná montáž hlučná? Je potrebné, aby klient upozornil susedov na možný hluk?

Susedia by mali byť určite upozornení na prípadný hluk. Jednoznačne neodporúčam plánovať si montáž na 8. hodinu večer, kedy vám môže hroziť rušenie nočného pokoja. Pri nasadzovaní vnútornej jednotky nevzniká veľký hluk, tam sa len namontujú konzoly na stenu. No pri vonkajšej jednotke je potrebné urobiť prieraz cez stenu, ktorý má priemer aj 50 cm. To ako dlho to trvá závisí od toho či sa vŕta do betónu, kedy montáž zaberie aj hodinu alebo do tehly, kedy je to vyvŕtané za pár minút.

Keďže sa vŕta do steny predpokladám, že vzniká nejaký neporiadok. Asi je dobre keď si klient vopred zakryje nábytok.

Presne tak, ja si so sebou nosím aj igelit, ktorým zakrývam najbližšie časti nábytku, ktoré môžu byť zasiahnuté. Pri vŕtaní používame priemyselný vysávač, ktorým odsávame prach, takže prašnosť sa snažíme maximálne obmedziť. No niekedy, hlavne pri vŕtaní do betónu sa stáva, že odskakujú kamienky, preto, je v aj záujme domácich pozakrývať si nábytok.
Nábytok máme zakrytý, poďme na samotnú montáž a popíšme si jednotlivé kroky.
Ako prvá prichádza na rad príprava miesta pre vnútornú jednotku, ktorá sa osadí pomocou plechu (súčasťou balenia) a konzol. Nasleduje prieraz cez stenu pre medené (CU) potrubie, kondenz a káble. Používajú sa dva druhy káblov – napájacie káble, pre napojenie jednotky do elektriny a komunikačné káble, pre komunikáciu vnútornej a vonkajšej jednotky. Ďalej sa natiahne trasa, čo znamená montáž líšt od vnútornej jednotky k vonkajšej (v panelákoch si ľudia väčšinou vyberajú natiahnutie trasy cez lišty a nie cez zasekanie do muriva, ktoré je zložitejšie a vyžaduje si menšie stavebné úpravy, napr. opätovné sadrovanie miesta, kde sa zasekávalo). Do líšt sa následne uloží CU potrubie. Až potom môžem zavesiť samotnú vnútornú jednotku na pripravené konzoly a pripojiť ju na CU potrubie, kondenz a káble.
Takže, keď máme hotový interiér, môžeme sa presunú k vonkajšej jednotke, čomu predchádza vŕtanie prierezu do steny.
Správne a nič nám nebráni namontovať vonkajšie konzoly, ktoré budú držať vonkajšiu jednotku tak povediac vo vzduchu. Vonkajšiu jednotku treba rovnako pripojiť na CU potrubie, káble a poprípade kondenz. Hovorím poprípade, pretože keď klimatizácia funguje ako chladenie kondenz ide z vnútornej jednotky, ale keď je nastavená na kúrenie, tak kondenz ide z vonkajšej jednotky. Preto niekedy v zime vidíte na vonkajších jednotkách ľad, lebo ľudia klimatizáciou prikurujú a voda, ktorá je odvádzaná von pri nízkych teplotách zamŕza.

Vnútorná a vonkajšia jednotka sú osadené, medené potrubie je natiahnuté, miesto pre kondenz určené, vyzerá to, že môžeme začať chladiť, resp. kúriť. Je teda ešte niečo čo treba pred spustením urobiť?

To, že toto je záverečná fáza si myslí veľa ľudí a preto sa púšťajú do montáže sami. Zabúdajú, resp. nevedia, že je potrebné vákuovanie vonkajšej jednotky- z vonkajšej jednotky sa musí odsať vzduch. Robí sa to pomocou manometra a vákuovej pumpy (pomerne drahá záležitosť). Vákuová pumpa sa nasadí na medené potrubie z vonkajšej strany a postupne sa z nej odsáva vzduch, trvá to cca 10 minút, no závisí to od dĺžky trasy. Manometer pri tom ukazuje koľko vzduchu je v potrubí. Keď je vákuovanie ukončené, je potrebné skontrolovať či nie je niekde únik vzduchu. Ak je všetko v poriadku, odpojí sa vákuová pumpa a otvoria sa ventily na vpustenie chladiva (najnovšie typy chladiva R410). V každej klimatizácií je väčšinou preplnené chladivo na 5 metrovú trasu.

Tak teraz je už klimatizácia pripravená na prvé zapnutie?

Áno, zapojí sa do elektrickej siete a spustí sa do prevádzky. Klimatizácia sa môže začať hneď používať, pričom ja vždy klientom vysvetlím ako používať ovládač, pretože nie vždy je to intuitívne používanie.

Ako vidím, je to celkom zložitý mechanizmus, ktorý si iste vyžaduje servis a údržbu. Ako často treba vykonávať servis klimatizácie?

Pre domácnosti odporúčam vykonávať servis raz ročne. V komerčných prevádzkach ako sú napríklad kaviarne, reštaurácie alebo dokonca serverovne, kde sú klimatizačne zariadenia v prevádzke non-stop je potrebné vykonávať servis aj 2-3 krát ročne. Servis spočíva predovšetkým vo vyčistení filtra, demontáži krytu vnútornej jednotky a dezinfekcií výparníka. Údržba vonkajšej jednotky je tiež dôležitá, robí sa jej očistenie zo zadnej strany a premeranie tlaku v jednotke.
Dúfame, že ste si urobili vlastnú predstavu o tom, ako prebieha montáž klimatizácie a milí páni, veríme, že po prečítaní článku zveríte montáž do rúk skúseného odborníka. Ušetríte si tak čas, peniaze a možno aj nervy.

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Čo je to Split?

Jedná se o anglický výraz delenia klimatizačnej jednotky. Ta sa skladá z vnútornej a vonkajšej klimatizačnej jednotky, ktoré sú mezi sebou spojené technologickým vedením (vnější a vnitřní jednotka jsou prepojené medeným potrubím s chladivom vrátane izolácie a komunikačného kábla).

Vnútorná jednotka obsahuje: výparník s velkou plochou, tichý obehový ventilátor a riadiacuí elektroniku celého systému.
Vonkajšia jednotka obsahuje: kondenzátor, ventilátor, rotační kompresor s vysokou účinnosťou, spínacie relé – prípadne ovládaciu elektroniku kompresoru.

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What happens if a Proximity card is lost or stolen?

Proximity cards can be easily deleted or void from the system which instantly disables the user from accessing any doors. Cards can be made void through the system’s keypad or through the management software. If the system is set-up for remote off-site connection the card can be deleted remotely without the need for a visit to site. It is recommended that the card is not carried with ID badges (which could potentially display details of the premises), and that the loss or theft of a card is reported immediately.

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2012 January -Media Release - Crimes generally increase in the summer months. Are you 2-3 times more likely to be targeted than your neighbour?

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