LW Measurements MRW 33 Mid Resolution Washdown - Manual (Page 7)

7
1.3 IP65 protection
Your MRW weighing machine is rated to IP65.
The IP rating system

IP stands for Ingress Protection
 The rating’s first digit e.g. IP65 relates to the ingress protection against dust (6 means dust tight,
see the table below)

The second digit e.g. IP65 relates to the ingress protection against water (5 means protected
against water jets, see the table below)
Protection against solid objects
1st Digit Description Definition
0 Non-protected No special protection
1
Protected against solid objects greater than
50 mm A large surface of the body such as the hand (no protection against
deliberate access). Solid objects exceeding 50mm diameter
2
Protected against solid objects greater than
12 mm Fingers or other objects not exceeding 80 mm in length. Solid objects
exceeding 12 mm diameter
3
Protected against solid objects greater than
2.5 mm Tools, wires, etc of diameter or thickness greater than 2.5 mm. Solid
objects exceeding 2.5 mm diameter.
4
Protected against solid objects greater than
1.0 mm Wires or strips of thickness greater than 1.0 mm. Solid objects exceeding
1.0 mm
5 Dust protected
Ingress of dust is not totally prevented but dust does not enter in
sufficient quantity to interfere with satisfactory operation of the equipment
6 Dust-tight
No ingress of dust
Protection against liquids
2nd Digit Description Definition
0 Non-protected No special protection
1 Protected against dripping water
Dripping water (vertically falling drops)
2
Protected against dripping water when tilted
up to 15º Vertically dripping water shall have no harmful effect when the enclosure
is tilted at any angle up to 15º from its normal position
3 Protected against spraying water
Water falling as spray at an angle up to 60º from the vertical shall have
no harmful effect
4 Protected against splashing water
Water splashed against the enclosure from any direction shall have no
harmful effect
5 Protected against water jets
Water projected from a nozzle against the enclosure from any direction
shall have no harmful effect
6 Protected against heavy seas
Water from heavy seas or water projected in powerful jets shall not enter
the enclosure in harmful quantities
7 Protected against the effects of immersion
Ingress of water in a harmful quantity shall not be possible when the
enclosure is immersed in water under defined conditions of pressure and
time
8 Protected against submersion
The equipment is suitable for continuous submersion in water under
conditions, which shall be specified by the manufacturer