AU/NZ
TECHNICAL DATA (D)
Hearing protector Class 5 tested to AS/NZS 1270:2002. When selected, used and maintained as specified in AS/
NZS 1269.3:2005, this protector may be used in noise up to 110 dB(A) assuming an 85 dB(A) criterion. A lower
criterion may require a higher protector class.
MT1H7F*-50
SLC
28 dB
80
Frequency
125
Mean attenuation (dB)
13.6
Standard Deviation (dB)
5.4
Mean - SD
8.2
MT1H7B*-50
SLC
29 dB
80
Frequency
125
Mean attenuation (dB)
12.2
Standard Deviation (dB)
6.3
Mean - SD
5.9
MT1H7P3*-50
SLC
31 dB
80
Frequency
125
Mean attenuation (dB)
14.6
Standard Deviation (dB)
3.2
Mean - SD
11.4
(D:2) Sound exposure when using the auxilary input
1. Level under the ear-muff [dB(A)]
2. Input voltage [mVrms]
A. External volume normal, mode 1
B. External volume normal, mode 2
C. External volume normal, mode 3
D. External volume high, mode 1
E. External volume high, mode 2
F. External volume high, mode 3
G. Power off (failsafe mode)
(D:3) Criterion level
The criterion level is the noise (mesured as A-weighted sound pressure level) outside the hearing protector that
gives 85 dB(A) inside. The outside level depends on the type of noise: H is high – frequency dominated noise, M is
noise that is not dominated by any given frequency and L is low – frequency dominated noise.
FITTING/ADJUSTMENT(E)
Adjusting the helmet attachment
(E:1) Snap the helmet attachment into the slot on the helmet. To switch the unit from ventilation to working position,
press the headband wires inwards until you hear a click on both sides. Ensure that the shell and the headband wires
in working mode do not bump or snag on anything so that noise leakage can occur.
Note: The shells can be set in three positions: (C:2) working position, (E:3) ventilation position and (E:4) parking
position.
Adjusting the neckband
(E:5) Adjust the shells so the ears are completely surrounded by the ear cushions.
(E:6) Adjust the height using the headband until you have a snug, comfortable fit.
(E:7) The headband should lie across the top of the head.
250
500
1000
2000
18.2
29.4
32.0
35.3
4.5
4.2
3.3
2.9
13.7
25.2
28.7
32.4
250
500
1000
2000
21.8
30.7
34.7
33.5
5.1
4.5
2.3
3.6
16.7
26.2
32.4
29.9
250
500
1000
2000
22.4
31.3
35.7
32.8
3.5
2.7
2.9
2.5
18.9
28.5
32.8
30.3
4000
8000
35.8
37.9
3.1
5.6
32.7
32.3
4000
8000
35.0
37.3
3.0
2.9
32.0
34.4
4000
8000
37.0
37.7
2.4
3.9
34.6
33.8
152