IP ( Ingress Protection ) Rating

Latar Belakang:
IP57 dan IP67. Dua kode tersebut pernah saya dengar dari sebuah spesifikasi smartphone Android seperti Motorola Defy, Xperia Active, dan yang terakhir adalah hp sangat powerful saat tulisan ini ditulis yaitu Sony Xperia Z.
Sejauh yang saya tau jarang ada hp dengan sertifikasi IP57 namun memiliki hardware yang sangat high end (Xperia Z)
Ok, cukup promosinya mungkin, yang saya mao dokumentasikan disini adalah tentang sertifikasi tersebut.

IP atau Ingress Protection adalah sertifikasi suatu benda terhadap material debu dan air.
IP rating ini di develop oleh European Committee for Electro Technical Standardization (CENELEC) (NEMA IEC 60529 Degrees of Protection Provided by Enclosures - IP Code) yang biasanya ditunjukkan oleh 2 atau 3 angka.
contoh: IP56, dll
Angka pertama menunjukkan rating terhadap benda/objek padat (solid objects). Sedangkan angka kedua menunjukan rating terhadap objek cair.
Angka ketiga (jika ada) menunjukkan ketahanan terhadap benturan mekanik (biasanya dihilangkan karena tidak sesuai spesifikasi IEC.

Berikut tabelnya yang saya ambil dari sumber terpercaya (tanpa diterjemahkan lagi)

IP First number - Protection against solid objects
0  No special protection
1  Protected against solid objects over 50 mm, e.g. accidental touch by persons hands.
2  Protected against solid objects over 12 mm, e.g. persons fingers.
3  Protected against solid objects over 2.5 mm (tools and wires).
4  Protected against solid objects over 1 mm (tools, wires, and small wires).
5  Protected against dust limited ingress (no harmful deposit).
6  Totally protected against dust.

IP Second number - Protection against liquids
0  No protection.
1  Protection against vertically falling drops of water e.g. condensation.
2  Protection against direct sprays of water up to 15o from the vertical.
3  Protected against direct sprays of water up to 60o from the vertical.
4  Protection against water sprayed from all directions - limited ingress permitted.
5  Protected against low pressure jets of water from all directions - limited ingress.
6  Protected against temporary flooding of water, e.g. for use on ship decks - limited ingress permitted.
7  Protected against the effect of immersion between 15 cm and 1 m.
8  Protects against long periods of immersion under pressure.

IP Third number - Protection against mechanical impacts (commonly omitted, the third number is not a part of IEC 60529)

0  No protection.
1  Protects against impact of 0.225 joule (e.g. 150 g weight falling from 15 cm height).
2  Protected against impact of 0.375 joule (e.g. 250 g weight falling from 15 cm height).
3  Protected against impact of 0.5 joule (e.g. 250 g weight falling from 20 cm height).
4  Protected against impact of 2.0 joule (e.g. 500 g weight falling from 40 cm height).
5  Protected against impact of 6.0 joule (e.g. 1.5 kg weight falling from 40 cm height).
6  Protected against impact of 20.0 joule (e.g. 5 kg weight falling from 40 cm height).

Jika dilihat, Xperia Z memiliki sertifikasi IP57 maka:
5 --->  Terlindung dari debu dalam jumlah terbatas dan aman?
7 -->   Terlindung jika ditenggelamkan / didiamkan antara 15cm - 1meter kedalaman air

Semoga informasi berguna buat saya dan juga buat pembaca.
Thanks!

Source:
http://www.engineeringtoolbox.com
http://gerranek.blogspot.com
http://www.sensorsone.co.uk

Just collecting notes and sharing..