BA 9213 en 03/2012
1.1.1
Measuringsurface soundpressure level
The gear unit has a measuringsurface soundpressure level at a distance of 1 m, which can be found in
table 1.
The measurement is carried out to DIN EN ISO 9614 Part 2, using the soundintensity method.
The workplace of the operating personnel is defined as the area on the measuringsurface at a distance
of 1 metre in the vicinity of which persons may be present.
The soundpressure level applies to the warmedup gear unit at input speed n
1
and output power P
2
stated
on the rating plate, as measurement obtained on the Siemens test bench. If several figures are given, the
highest speed and power values apply.
The measuringsurface soundpressure level includes addon lubrication units, if applicable. With
outgoing and incoming pipes, the interfaces are the flanges.
The soundpressure levels stated in the table were obtained by statistical calculation by our Quality Control
Dept. The gear unit can be statistically expected to comply with these soundpressure levels.
Table 1:
Measuringsurface soundpressure level
Type
i
N
Gearunit size
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
38
40
42
PBUC
112 ... 160
97
97
98
98
99
99 100 100 101 101 102 102 103 103 104 104 105 106 106
180 ... 250
95
95
96
96
97
97
98
98
99
99
100 100 101 101 102 102 103 103 103
280 ... 450
93
93
94
94
95
95
96
96
97
97
98
98
99
99
100 100 102 102 102
The measuringsurface soundpressure levels shown apply with a tolerance of + 3 dB(A) for
n
1
= 1500 1/min.
At n
1
= 750 1/min, the values will be appr. 2 to 3 dB(A) lower.
