Epson TM-U230 Developer's Manual page 33

Confidential
IP
The ability of an enclosure to keep out dirt and water is defined in IEC 529. When an enclosure
protects the equipment from water and particles of dirt, it also protects people from any
potential hazard inside the equipment.
The degree of protection is designated by the letters "IP" followed by two digits such as "IP01" or
"IP34." The first digit indicates the degree that the equipment is protected from solid foreign
objects. The second digit indicates the degree that the equipment is protected from water. The
details are described in the tables below. The first digit, protection from solid foreign objects, is
divided into "protection from human contact" and "protection from foreign bodies."
First Digit Protection From Human Contact
0 No protection
1 Protection from the palm of a hand
2 Protection from fingers
3 Protection from tools and thin wires, etc. with
a diameter more than 2.5 mm
4 Protection from tools and thin wires, etc. with
a diameter more than 1 mm
5 Complete protection
6 Complete protection
Second Digit Ability to keep water out
0 No protection
1 Keeps out water coming from directly above
2 Keeps out water coming from an angle up to 15 from vertical
3 Keeps out water sprayed at an angle of 60 from vertical
4 Keeps out water sprayed from all directions (only a certain amount of water
penetrating the enclosure is permitted)(*)
5 Keeps out low pressure water jet sprayed from all directions (only a certain amount of
water penetrating the enclosure is permitted)(*)
6 Keeps out high pressure water jet sprayed from all directions (only a certain amount of
water penetrating the enclosure is permitted)(*)
7 Keeps out water during temporary immersion
8 Keeps out water during permanent immersion
(*) : Only a certain amount of water may enter though the printer can continue printing.
TM-U230 Developer's Guide
Protection From Foreign Bodies
No protection
Protection from foreign bodies with a
diameter greater than 50 mm
Protection from foreign bodies with a
diameter greater than 12.5 mm
Protection from foreign bodies with a
diameter greater than 2.5 mm
Foreign body with a diameter greater
than 1 mm
Protection from grainy foreign bodies
(only a certain amount is permitted)
Complete protection from grainy foreign
bodies
Handling 2-3