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14. The microphone's wind protector, which eliminates wind noise etc., should be kept clean and changed when
necessary.
15. If the above mentioned recommendations are not followed, the protection and function afforded by the earmuffs
may be severly impaired.
4. STEREO BALANCE
The sound levels of the earmuffs can be set individually using the controls B-L (left) and B-R (right) (8). Use a small
screwdriver. To access the controls, remove the ear cushion and mounting plate from the right earmuff.
5. BATTERY REPLACEMENT
Unscrew the locking screw and open the battery lid. Remove the old batteries. Insert new 1.5 V AA-alkaline
batteries into the battery compartment (1) in accordance with the instructions inside the compartment. Ensure that
the battery lid is closed completely. It is time to change the batteries when the sound reproduction is weakened or
impaired. New alkaline batteries provide approx. 140 hours' operation.
6. ANTENNA
Bilsom ELECTO / ELECTO HF is equipped with a special antenna for best reception possibilities. In areas with
limited head space, it is possible to attach the antenna to the headband, but this will somewhat reduce the
reception sensitivity, especially if you are listening to a distant or weak transmitter.
7. APPROVAL
Bilsom ELECTO / ELECTO HF is tested and approved in accordance with the AS/NZS 1270:2002 Standard at
Michael & Associates Inc., USA.
ELECTO Attenuation data according to AS/NZS 1270:2002
(in passive mode, electronics switched off)
Frequency, Hz
Mean attenuation, dB
Standard Deviation, dB
Mean-Minus-Standard Deviation, dB
Class 4
ELECTO HF Attenuation data according to AS/NZS 1270:2002
(in passive mode, electronics switched off)
Frequency, Hz
Mean attenuation, dB
Standard Deviation, dB
Mean-Minus-Standard Deviation, dB
Class 5
Bilsom Electo HF was tested in combination with the following
industrial safety helmets, and may give different levels of
protection if fitted to different helmets:
AS/NZS 1270:2002
Helmet
Bicapa Balance AC
125
250
12.8
17.4
2.4
4.5
10.4
12.9
125
250
13.8
16.8
4.5
2.9
9.3
13.9
Bilsom ELECTO HF
500
1000
2000
25.6
24.9
27.8
4.4
2.9
3.3
21.2
22.0
24.5
500
1000
2000
29.3
28.7
29.4
5.8
4.7
3.6
23.5
24.0
25.8
71
SLC
4000
8000
38.7
43.1
5.0
4.2
24 dB
33.7
38.9
SLC
4000
8000
37.9
43.0
3.7
4.9
26 dB
34.2
38.1
80
80
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