Before we discuss the importance of Outdoor LCD displays IP Ratings (Ingress Protection), let’s first examine what an IP rating is and how it works.
The standard known as IEC 60529 defines different levels of ingress protection. This standard makes it easy for users to judge the ingress protection of a product so they don’t have to rely on vague marketing terms like “waterproof”. IEC 60529 promotes uniformity in describing the protection provided by enclosures.
An IP rating is a two digit number and describes protection levels for electronic equipment.
The two digits represent different types of environmental influence. The first digit represents protection against ingress of solid objects, while the second digit represents protection against the ingress of liquids.
The table below outlines the protection requirements for both the first and second digit in an IP rating.
|IP Rating||First Digit: Ingress of solid objects||Second digit: Ingress of liquids|
|Object size protection||Effective against|
|0||N/A||No protection against contact or ingress of objects.||No protection|
|1||>50mm||Any large surface of the body, such as the back of a hand.||Protected against vertically falling drops of water or condensation|
|2||>12.5mm||Fingers or similar objects||Protected against vertically dropping water when the enclosure is tilted by up to 15o from the normal position.|
|3||>2.5mm||Tools, thick wires, etc||Protected against water falling as a spray at any angle up to 60o from the vertical position.|
|4||>1mm||Most wires, screws, etc||Protected from water splashed from any direction.|
|5||Dust protected||Limited protection against dust ingress (no harmful deposits)||Protected against low pressure water jets sprayed from any direction. Limited ingress is permitted provided it has no harmful effects.|
|6||Dust tight||Totally protected against dust ingress.||Protected against high pressure water jets sprayed from any direction. Limited ingress is permitted provided it has no harmful effects.|
|7||N/A||Protected against submersion (up to 1 meter) for short periods of time. Limited ingress is permitted, provided it has no harmful effects.|
|8||N/A||Protected against submersion (up to 3 meters) for long periods of time.|
|9||N/A||Protected against close-range (0.1 to 0.15 meters) high pressure, high temperature spray downs.|
A rating of “X” is sometimes describes one or more of the protection criteria. This “X” rating represents no test data. However, this does not mean “no protection”. For example, a piece of electronic equipment rated IPX7 demonstrates a robust resistance to the ingress dust because it has strong liquid protection, even though a rating for the ingress of solids has not been formally assigned. Therefore, an X designation shouldn’t be misconstrued as a lack of protection.
So, Why is the Outdoor LCD Displays IP Rating an important consideration?
Outdoor environments present a different set of challenges for Outdoor LCD Displays IP Ratings compared to the TV in your living room. These environmental challenges include.
- Dust and dirt
- High levels of moisture
- Wider temperature ranges
- Insects and other small animals.
In this article, we will focus on physical elements interfering with the operation of an outdoor LCD display. A separate article will discuss temperature.