|
|
MEANING OF THE PROTECTION SYMBOLS(as per UNE 20 - 3248 REGULATION)
 |
Protected against dust (without damaging sediments). |
 |
Fully protected against dust. |
 |
Protected against raining water upto 60° in vertical. |
 |
Protected against water coming in all directions. |
 |
Protected against electric discharge with double
insulation. |
RANGES
| MAXIMUM RANGES IN METERS DEPENDING ON AREAS, FOR AUDIBLE WARNINGS |
| DECIBELS
at 1 m of transceiver |
115 |
110 |
105 |
100 |
95 |
90 |
85 |
80 |
75 |
|
Quiet areas without noise, wind and obstacles (sea, country).
|
300 |
250 |
200 |
150 |
100 |
60 |
50 |
40 |
30 |
|
Areas with noise of ~ 70 dB (at city street).
|
100 |
80 |
65 |
45 |
30 |
18 |
15 |
12 |
8 |
|
Crowded areas and high noise level (stadiums).
|
30 |
25 |
20 |
15 |
10 |
7 |
5 |
4 |
3 |
|
