What is CCTV? Why is there a need for CCTV?

CCTV or Closed Circuit Television is a visual surveillance technology system designed to monitor the desired surrounding environment and its activities. CCTV plays a more important role in assisting the police and security organizations in their investigations. It has become an icon for security and its presence is guaranteed to generate a sense of security and is now welcomed by many industries.

How to choose a suitable CCTV camera for your needs.

The important point to be noted is, Selecting the right CCTV Camera that fits your digital surveillance requirements. These are the set of guidelines to be noted when choosing the correct CCTV camera for your application:

  • Location: Indoor or outdoor application
  • Requirement for day and night surveillance
  • The angle of view requirement. Wide angle coverage or a narrow field of view is required.
  • Budget

What is Day and Night Camera?

These cameras can provide video surveillance even at low levels of illumination. This camera displays a full color image during the day & when the lighting is poor, monochrome (Black and white) video images are displayed. It is designed to increase its light sensitivity in poor lighting conditions and at the same time reduce noise level in the images. However, the day and night camera will fail if the illumination (Lux) level is too low. 

What is IR camera?

IR or Infrared cameras have image sensors that are designed to sense & process infrared light emitted from IR LEDs. Similar to Day & Night cameras, IR cameras turned to monochrome mode when illumination falls below a certain Lux. Unlike the Day & Night camera, an IR camera will be able to capture video images in absolute darkness with the help of infrared light source. 

How many days/weeks of recording can I store?

This depends on the size of your hard drive, the number of cameras, which recording mode (on  motion, on alarm, continuously, etc.), what type of video compression you are using, quality of  resolution used. Please contact our technical support directly for assistance on the calculation. 

I have installed a new camera and lens why am I unable to obtain a sharp image?

The most common resolve to this is to ensure that both camera and lens are the same mount i.e. ‘CS’ mount lens on a ‘CS’ mount camera and a ‘C’ mount lens on a ‘C’ camera.

Why do I have a clear sharp picture during the day and it is out of focus at night?

This is due to the depth of field changing as the light conditions change and can be easily overcome by following set procedures.

How do I back focus a camera fitted with a fixed focal length lens?

This is achieved by following five simple steps.

  • Set the physical focus of the lens to infinity (clockwise from the front).
  • Aim the camera at the subject to be viewed.
  • Release the camera back focus mechanism.
  • Adjust the back focus to obtain the best possible picture.
  • Secure the cameras back focus mechanism.

How do I choose the correct camera for my application?

A high resolution camera should be considered where greater detail of scene is required. Choosing a more sensitive camera will improve reproduction in poorly lit areas, which is indicated by the minimum amount of light in order for the camera to produce a usable picture. A conventional camera produces a pale backdrop when an object is shot against a bright background. BLC (Back Light Compensation) will counter strong light sources retaining picture quality.

How do I set up a camera and lens for use in Low Light conditions and or with Infra Red Lighting?

When setting the back focus of a Color camera for low light conditions you should place an ND1 (Neutral Density) filter in front of the lens. When setting the back focus of a Mono camera for low light conditions you should place an ND3 (Neutral Density) filter in front of the lens. When setting the back focus of a Mono camera fitted with I/R lighting for low light conditions you should place an IRP (Infra- Red Pass) filter in front of the lens.
Should you not have any of the above filters you may have to attend site during the hours of darkness.

What size monitor should I be using?

The correct size monitor is dependent on its use e.g. the number of images to be displayed at any given time, the viewing distance and the available space.

Do I have to use a Regulated Power Supply?

In general the answer is yes. Most manufacturers will recommend the use of such power supplies as standard with their equipment. You should always consult the manufacturer’s specifications prior to the connection of any power supply.

Why does the alarm go off during cold weather?

The unit may go into alarm only when it is very cold out or if a door adjacent to a heated area is opened, such as in an entry way.  This is due to condensation (water vapor) in the detection chamber. The sensor is a particle-sensing device and when water condenses in the sensor, the unit will go into alarm.  The operating temperature on FireX smoke alarms is between 40 and 100 degrees Fahrenheit (4 - 38 degrees Celsius).  If the unit is in a garage or attic, you may consider replacing it with a heat alarm which is not effected by condensation.

How often should the battery be changed in my smoke alarm?

It is recommended that the battery in every smoke alarm be replaced at least once a year to ensure it is operating properly or any time the unit indicates that the battery is weak. The general rule is to replace the batteries when we switch to daylight savings time and / or when we switch back. When the battery requires replacement, the alarm will sound a short beep or chirp approximately once every minute. At this time you must remove the old battery and replace it with a fresh battery of the correct type.

What is DVR?

A digital video recorder (DVR), sometimes referred to by the merchandising term Personal video recorder (PVR), is a consumer electronics device or application software that records video in a digital format to a disk drive USB flash drive, SD memory card or other local or networked mass storage device.

What type of monitor can be connected to a DVR?

This depends on which DVR. There are three types of video outputs that vary by DVR model. The three types of video output connections are: BNC, S-Video, and VGA. 

  • A BNC video output can be connected to CCTV monitors (BNC inputs) or connected to a standard television with RCA video input but using a BNC to RCA male converter. 
  • An S-Video outputs can be connected to a standard television monitor which has an S-Video input. Most modern televisions have s-video inputs and/or RCA video inputs. 
  • A VGA output can be connected to a standard VGA computer monitor. 

What is Access Control?

When combined with a barcode reader and Electronic Door Controller can provide access control for your facility entrance doors together is termed as Access Control.  Members swipe a card and then pass through a turnstile, swing gate or half-height door. Install an electronically-controlled door lock on the outside entrance for 24-hour access.

What type of lock should I purchase?

You can use any time of lock that works for your physical layout, but the most common types are electric door strikes and magnetic locks.

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