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To ensure optimal performance of night vision cameras and the overall security system, it's essential to follow proper technical guidelines. Here are key considerations for installation and equipment selection:
1. **Sufficient Power Supply**:
When using infrared lights like the KL-5975 series, which includes 45 high-power 8mm diameter infrared LEDs, each group consumes about 90–100mA. With 7 groups, total power consumption is approximately 700mA. Adding the CCD board’s 110mA, the total is around 810mA. To account for fluctuations and safety, a power supply of at least 1A (810mA × 1.3) is recommended. Insufficient power can lead to poor night vision performance or even damage to the camera.
2. **Choose Reliable Power Adapters**:
Always use power supplies from well-known manufacturers with 3C certification. Many low-quality adapters use refurbished components that may fail prematurely or cause voltage instability. These can lead to equipment damage, especially when the mains voltage fluctuates. A stable power source is crucial to avoid long-term issues and costly repairs.
3. **Use Switching Power Supplies in Rural Areas**:
In rural environments where the AC voltage may drop below 180V, standard power supplies may not provide enough output. This can result in insufficient DC voltage (below 12V), causing the camera to freeze or malfunction. Long-term low voltage operation can also burn out the camera, leading to expensive replacements.
4. **Proper Wiring for Centralized Power Supply**:
Ensure that all power cables are of sufficient gauge to handle the required current. For example, 1mm² copper wire can carry up to 3A. If the camera consumes around 1A, using undersized wires can cause voltage drops and affect normal operation. Proper wiring is essential for consistent performance.
5. **Use Standard Video Cables and Connectors**:
Non-standard cables made from poor materials (like non-oxygen-free copper) can increase signal resistance and reduce video quality, resulting in blurry images. Poor shielding also increases the risk of interference and failure. Use BNC connectors made from pure copper with gold plating to ensure good conductivity and prevent virtual connections.
6. **Lightning Protection Is Critical**:
As thunderstorms become more frequent, lightning protection must be considered during system design. Even if customers do not opt for it, installers should check the grounding and polarity of the main power supply before installation. Grounding is essential for surge protection, regardless of the internal circuit design.
7. **Select High-Quality Video Recorders and Capture Cards**:
Choose reliable video recorders and capture cards to ensure smooth playback. Different compression formats like CIF, HalfD1, D1, and D4 offer varying levels of quality. D1 provides the best clarity, making it ideal for security systems. Understanding these differences helps manage customer expectations and avoid disputes during project acceptance.
8. **Video Compression Formats Comparison**:
H.264 offers superior image quality compared to MPEG4 and MJPEG under the same bitrate. For instance, at 100kbps, H.264 delivers about 3dB better than MPEG4 and 10dB better than MJPEG. This means H.264 can store twice as much footage as MPEG4 and ten times as much as MJPEG at the same quality level. Choosing the right format ensures efficient storage and transmission without compromising video quality.
By following these guidelines, you can ensure a stable, high-performance surveillance system that meets both technical and customer expectations.
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