Security Camera

Why does my camera all of a sudden have a yellow color 
What is the megapixel security camera field of view resolution
What is Protection Classification IP 68? 
What is Protection Classification IP 66?
What is "Lux" for cameras?
What is Automatica Gain Control? 
What is an Auto Iris Lens? 
What is the camera format? 
What is BLC "Back Light Compensation"?
__________________________________________________________________________
Why does my camera all of a sudden have a yellow color?

unplug the power to the camera and then power it back up for it to reset.
BACK TO TOP
__________________________________________________________________________
What is the megapixel security camera field of view resolution?

- 2048x1536 3MP
- 1920x1200 WUXGA
- 1920x1080 ADTV-1080p
- 1280x720 HDTV-720p
- 1024x768 XGA
- 800x600 SVGA
- 704x570 PAL
- 704x480 NTSC
- 640x480 VGA
- 352x288 CIF
- 320x240 SIF
- 1280x1024 1.3 MP
- 1600x1200 2 MP

BACK TO TOP
__________________________________________________________________________
What is Protection Classification IP 68?

The protection classification offered by an enclosure is shown by the letter IP (Ingress Protection) and two digits. The first digit indicates two factors:

 1. Protection for persons
 2. Protection for equipment

The second digit indicates the protection against water.

First digit: 6

Protection for persons:

Protection against a wire touching dangerous parts.

Definition:

A body 1,0 mm in diameter must not be able to enter.

?

Test conditions:

The accessing probe is pushed against every opening of the enclosure with a standardised force or is inserted through the opening.

?

Conditions for acceptance:

The protection is satisfactory if a sufficient distance between the accessing probe and dangerous parts is kept.

?

Protection for equipment:

Sealed against dust

?

Definition:

Dust must not enter at all.

?

Test conditions:

The test is carried out in a dust chamber in which talcum powder is being kept suspended in the air by means of a dust distributor or similar device. The enclosure which is being tested is placed in the test chamber while a vacuum pump keeps the pressure in the enclosure below the atmospheric pressure of the environment according to the standard.

?

Conditions for acceptance:

The protection is satisfactory if there is no visible dust deposit within the enclosure after completion of the test.

?

Second digit: 8

Protection against water :

Protection against the effects of constant submersion in water.

Definition:

Water must not enter in a quantity that could have harmful effects if the enclosure is kept permanently under water under conditions agreed between the manufacturer and the user; however, these must be more difficult than those under Fig. 7.

?

Test conditions:

The enclosure is completely immersed in a water basin. The immersion depth as well as the test time are dependent on the conditions agreed on between manufacturer and user.

?

Conditions for acceptance:

Should water have penetrated, it must not

- be present in quantities which impair the good working order of the operating material or represent a safety hazard;
- deposit on non-conducting parts where it could lead to creep currents;
- come in contact with live parts or coils which are unsuitable for operating in wet conditions;
- collect near the wire end or possibly penetrate the wire.

?

BACK TO TOP
__________________________________________________________________________
What is Protection Classification IP 66?

The protection classification offered by an enclosure is shown by the letter IP (Ingress Protection) and two digits. The first digit indicates two factors:

? ? ? 1. Protection for persons
? ? ? 2. Protection for equipment

The second digit indicates the protection against water.

First digit: 6

Protection for persons:

Protection against a wire touching dangerous parts.

Definition:

A body 1,0 mm in diameter must not be able to enter.

?

Test conditions:

The accessing probe is pushed against every opening of the enclosure with a standardised force or is inserted through the opening.

?

Conditions for acceptance:

The protection is satisfactory if a sufficient distance between the accessing probe and dangerous parts is kept.

?

Protection for equipment:

Sealed against dust

?

Definition:

Dust must not enter at all.

?

Test conditions:

The test is carried out in a dust chamber in which talcum powder is being kept suspended in the air by means of a dust distributor or similar device. The enclosure which is being tested is placed in the test chamber while a vacuum pump keeps the pressure in the enclosure below the atmospheric pressure of the environment according to the standard.

?

Conditions for acceptance:

The protection is satisfactory if there is no visible dust deposit within the enclosure after completion of the test.

?

Second digit: 6

Protection against water :

Protection against powerful water jet.

Definition:

A strong water jet directed at the enclosure from any direction must not have any harmful effects.

?

Test conditions:

A jet nozzle with an inside diameter of 12.5 mm splashes a volume flow of 100 litres per minute from a distance of 2.5 - 3 metres from all sides onto the enclosure. The test time is 3 minutes.

?

Conditions for acceptance:

Should water have penetrated, it must not

- be present in quantities which impair the good working order of the operating material or represent a safety hazard;
- deposit on non-conducting parts where it could lead to creep currents;
- come in contact with live parts or coils which are unsuitable for operating in wet conditions;
- collect near the wire end or possibly penetrate the wire.

?

BACK TO TOP
__________________________________________________________________________
What is "LUX" for cameras?

LUX is defined as "Relative amount of light that will produce a viewable image." Cameras actually work in the opposite of the ratings of LUX. LUX is actually amount of light created where cameras are capturing light.

Below is a general reference of amount of light created in LUX ratings.

A few lux ratings for reference;
The sun - 100,000,
Sun with light cloud - 70,000,
Sun with heavy cloud - 20,000,
Home/office lighting - 100-1000,
Sunrise/sunset - 500,
Street Lighting - 1-10,
60 Wt. Bulb 10 ft. away - 10
Twilight - 4,
Full moon - 0.2,
Quarter moon - 0.02,
Overcast moon - 0.007,
Clear night sky - 0.001,
Average starlight - 0.0007,
Overcast night sky - 0.00005
BACK TO TOP
__________________________________________________________________________
What is Automatica Gain Control?

Most cameras come with an AGC circuit. This circuit examines brightness level of the video signal to keep it at a consistent level. For example, if the video signal is dark, it will attempt to increase the gain to bring the brightness up to a normal level.
BACK TO TOP
__________________________________________________________________________
What is Auto Iris Lens?

An automatic iris lens is a lens with a motorized iris that automatically adjusts to only allow a specific amount of light to reach the image sensor. When there is too much light, the iris will close to reduce the amount of light let in. Auto iris lenses are primarily used in applications where light levels vary and it would be impracticable to manually adjust the lens. Automatic iris lenses are generally more efficient than the electronic shutter since they actually control the amount of light reaching the sensor as opposed to simply adjusting the shutter speed.
BACK TO TOP
__________________________________________________________________________
What is the camera format?

Refers to the size of the imaging sensor. Common formats are 1/4", 1/2", 1/3", 2/3", and 1". The size of the sensor directly affects the field of view obtained. When using the same size lens on different format sensors, different viewing areas are obtained. For example, using a 6 mm lens on a 1/3" sensor will give you a 37 degree field of view. Using the same lens on a 1/2" sensor will increase the field of view to 56 degrees and 74 degrees on a 2/3" sensor. It is important to make sure you have a lens that was designed for at least the size of your sensor. For instance, you can use a 1" format sensor on a 1/3" camera, but you cannot use a 1/3" lens on a 1" camera. If you use a lens designed for a smaller format camera, the image will be vignetted. Also, by using a lens designed for a larger format sensor, the field of view will be greater than what is specified.
BACK TO TOP
__________________________________________________________________________
What is BLC " Black Light Compensation"

Many cameras included a BLC circuit. This circuit is used to help correct an image with more light behind the subject being viewed. Without backlight compensation, the subject appears dark with little detail. Using backlight compensation will reduce the brightness of the light to allow the subject to appear brighter and bring out the details.
BACK TO TOP
__________________________________________________________________________