In past engineering practice, it's common to encounter hidden risks in the pipeline installation of anti-theft alarm systems. These aren’t fire hazards, but rather vulnerabilities caused by human interference. For instance, at certain detector installation sites, you might find PVC pipe sleeves or exposed alarm cables. If the pipeline is installed too low, it can be easily reached by hand, making it a potential target for deliberate damage.
Some people may downplay the importance of proper pipeline installation, thinking that the system’s host has a tamper detection function that can alert them to any damage. However, this oversight can significantly reduce system efficiency or even cause a system shutdown, requiring engineers to spend extra time locating the fault. If the issue isn't resolved quickly, users might not be able to arm the system within the required warning time, as the system may still believe a failure exists.
Using PVC pipes or plastic conduits to protect alarm system cables is, in my view, clearly inappropriate. It's unprofessional from both the construction and investor perspective. Compared to galvanized steel pipes, PVC is far more susceptible to manual damage. Although cheaper, it lacks the durability and hardness of metal alternatives. In many overseas projects, you can see images of alarm probes with metal conduit running from the detector, connected via special connectors to a sealed metal box, which then links to a galvanized steel pipe—showing a much more secure approach.
The concealment of pipelines is another critical aspect, especially in new buildings. During design and installation, the routing of detector cables should be fully considered. Pre-embedding protective pipes during concrete pouring ensures maximum concealment of the entire transmission path. It’s also important to ensure that these pre-buried pipes can be easily connected to the main conduit. Placing a small-diameter steel pipe inside each sleeve makes future cable threading easier.
In some past installations, indoor wall-mounted detectors were installed without brackets due to cost concerns. This led to instability and increased difficulty in calibration, as the bracket wasn't adjustable. The cost of labor for installation, commissioning, and future maintenance often outweighs the savings from skipping the bracket. A project manager should always consider the long-term implications.
Sometimes, brackets are unnecessary. For example, if a detector is mounted on a wall at a 90-degree angle, you can drill holes, install expansion plugs, and secure the probe directly. This method avoids using a bracket, but the decision should depend on the specific installation environment.
When installing a detector, it's crucial to calculate the correct amount of cable length to leave. Too short a cable can make adjustments difficult, while too long a cable may create safety hazards. After installation, you can measure the actual length needed and trim the excess carefully to avoid exposing extra wires.
Connecting the tamper switch is another often-neglected step. Ideally, the tamper switch should be wired into the system to enhance security. However, many contractors use only a four-core RVV4x0.5 cable, reserving only two cores for power and two for the alarm signal. This leaves no room for the tamper switch, making the system vulnerable. If the tamper switch isn’t properly connected, a thief could disable the system during non-operational periods. To ensure full protection, the tamper switch should be connected to a 24-hour zone on the control panel. Unfortunately, very few projects implement this correctly.
Lastly, determining the installation location of the detector is often overlooked. Unlike camera placement, improper positioning can lead to high false alarm rates and missed detections. Moving a detector after installation can cause issues like rerouting pipelines, extending cables, and creating junction boxes—each introducing new risks. Moreover, changing the location can damage the building's interior, such as when moving a ceiling-mounted detector from a seamless wooden surface. Early and careful planning is essential to avoid these problems.
Pressure Transmitter,Pressure Transducer Sensor,Micro Pressure Sensor,Vacuum Pressure Transducer
Jiangsu Pinpai Technology Co., Ltd. , https://www.jspingpa.com