Mobile One HMP-1 Series Instruction Manual

HEADSET INSTRUCTIONS
AND
USER GUIDE
HMP-1 SERIES
Thank you for choosing a quality communications headset
from Mobile One Australia. This Headset has been designed
and developed to maximise comfort, provide superior
electronic communications and to ensure excellent hearing
protection within environments of high ambient noise.

2
INDEX
CERTIFICATION DATA 2
WARNINGS 2
FITTING INSTRUCTIONS 3 - 7
CARE & MAINTENANCE 7
PARTS REPLACEMENT 8 - 9
NOISE EXPOSURE 10
WARRANTY 11
CONTACT DETAILS 12
CERTIFICATION DATA
Mobile One headsets are tested and comply with AS/NZS1270 -2002,
Acoustics - Hearing Protectors. NOTE: As hearing protectors, Headsets
must be selected, used and maintained according to AS/NZS 1269.
These instructions must be followed if the headset is expected to
perform as indicated by the SLC80 rating in the chart below:
MODEL
No.
SLC80
RATING
CLAMP
FORCE
MASS FREQUENCY
Hz
125 250 500 1000 2000 4000 8000
HMP-1 30 10.0 455 MEAN
STD. DEVTN.
MEAN – STD. DEV.
15.5
3.5
12.0
19.7
2.7
17.0
29.7
4.0
25.7
34.7
3.2
31.5
35.1
3.5
31.6
39.6
4.5
35.1
39.3
6.0
33.3
According to the Class rating system: The HMP-1 Headset is a Class 5
WARNINGS
This headset will only provide the hearing protection as indicated by the SLC80
rating when it is maintained in good working order and fitted correctly. Other
factors affecting the noise attenuation characteristics of the headset are items
which affect the seal between the Ear Cushion and the head e.g. thick framed
glasses, protective clothing such as balaclavas, thick beards, etc.
It is vitally important that you give consideration to the sound output produced
by the earphones in the headset itself. You must ensure that the volume setting
of the radio, or other connected device, is adjusted to a safe listening level as
there are no output limiting devices included within the electronic circuitry of the
headset.
For correct care of this Headset, you must refer to the Care and Maintenance
Instructions on page 7.

FITTING INSTRUCTIONS
The purpose of a Headset is to:
1. Protect your hearing
2. Provide electronic communications
Correct fitment of the Headset to your head is vital for maximum
hearing protection and to optimise communications ability.
A CORRECTLY FITTED HEADSET
Figure A Figure B
PARTS OF A HEADSET
3
1
1. Headband
2.
Adjusting Slide
2
3. Ear Cushion
4. Ear Cup
5. Mic. Boom
6. Mic. Boom
Clamping Nut
4
3
7.
Mic.Element
Figure C.
5
7
6

NB: The Headset Ear Cups must be fitted over your ears
covering and enclosing them completely
The Headset should be fitted so that the horizontal axis of the Ear Cup bisects the
approximate tip of the nose of the wearer. This usually means the Headband of the
headset will be located directly above the ears, however the headband may be
adjusted slightly forward or rearwards for maximum comfort. See figure D below.
Note:
1. The horizontal axis at the nose
shown as the solid black line
2. The vertical position of the
Headband on the top of the head
as compared the vertical white
dotted line
Figure D
STEP BY STEP USER GUIDE
NOTE: The Headset is intended to be worn with the microphone
and cable on the left side of the head.
STEP 1 Adjusting position of the Mic. Boom
Release the holding tension of the
Microphone Boom (Figure C, item 5)
by unscrewing clamping nut (Figure C,
item 6) counter clockwise just enough
to be able to move the boom. This usually
takes less then a one quarter turn. You
will see that the boom can rotate up or
down to select the best positioning
angle. It can also slide in or out to select
the correct length for your head size. Re-
tighten nut after adjustments
(see figure 1.1, right)
Figure 1.1
4

5
The Microphone Boom can be further
adjusted so that the Microphone element
(Figure C, item 7) can be correctly positioned
in the centre of the mouth opening. Move the
ball joint at the mid point of the Microphone
Boom to shape the Boom as required. Also,
the screw at the Microphone element can be
loosened by half a turn counter clockwise
to adjust it’s angle. Re-tighten screw after
adjustments. (see Figure 1.2, right)
Figure 1.2
STEP 2 Fitting the Headset
Holding the Ear Cups as shown, slightly stretch
Headset apart just enough place over your head
(see Figure 2.0). Release and make sure the Ear
Cups sit evenly over your ears and cover them
completely. Move the Headset so the Headband is
sitting correctly and comfortably on your head (see
again Figure D).
NB: Do not over-stretch headset
Figure 2.0
STEP 3 Adjusting the Ear Cups
a) Figure 3.1 below illustrates how the black Adjusting Slides can be moved up or
down on the Headband. This allows you to adjust the position of the Ear Cup to
provide better comfort and a more efficient seal on the head to keep out noise.
b) With one hand, hold the Headband steady at the top of your head (as shown in
Figure 3.2). Holding the Ear Cup with your other hand, move it up or down to find
the best position so that the Ear Cup completely seals onto your head, around your
ear. No part of the ear should be caught between the Ear Cushion and the head.
Make similar adjustments for both sides and ensure Headset fits snugly.
Figure 3.1 Figure 3.2

STEP 4 Ensuring Ear Cups seal against your head
Placing one hand against each Ear Cup, firmly p
both Ear Cups inwards against your head and hold
for 2 seconds. This action moulds and helps the Ea
Cushions to form an efficient seal against the head
around your ears improving both comfort and
hearing protection.
ush
r
6
Figure 4.0
STEP 5 Adjusting the Mic. for maximum clarity
(5a) ADJUSTING MIC. DISTANCE
Microphone must be positioned
as close to the lips as is comfortable.
This provides better voice clarity
See Figure 5.1.
Maximum Distance
From lips = 5 mm
Figure 5.1
(5b) ADJUSTING MIC. POSITION
Adjust windsock (Microphone) to be
directly in the centre of the mouth
opening.
See figure 5.2.
NB: Project your voice loudly and
clearly into the microphone
Figure 5.2

STEP 6 Checking electronic operation
Check Earphones (speakers)
You should hear sound from your radio in both Ear Cups. If this is not the
case, check the connection to the communications device or that the
device is operating properly
Check Microphone
Check that the speech you are attempting to transmit is reaching the
intended person, clearly.
Caution: Do not set the volume level of the radio, or other connected, device too
high! See paragraph 2, Warnings on page 2.
CARE & MAINTENANCE
We recommend that your headset be cleaned regularly, by wiping with a damp
sponge containing mild soap and water. Pay special attention to the Ear Cushions
to ensure removal of perspiration and skin oils which can reduce the service life of
the Cushions. These areas of the Headset that come into contact with the wearer’s
skin should also be regularly disinfected using isopropyl alcohol wipes.
When cleaning DO NOT allow moisture to enter the Ear Cup assemblies or any part
of the Microphone Assembly. UNDER NO CIRCUMSTANCES SHOULD YOU
IMMERSE THE HEADSET IN ANY LIQUID.
To maintain the noise attenuation properties of the Headset, the Ear Cushions (see
Figure 6.0, item 2) should be replaced every six months and the inner foam
assembly (see Figure 6.0, item 3) every twelve months. More frequent replacement
of these items may be required if the Headset is being used under extreme
conditions. Inspect the headset regularly for signs of damage or wear.
7
IMPORTANT: This Headset should not be stored in direct
sunlight or temperatures above 55 degrees C. as distortion
of the Ear Cushions may occur.

8
PARTS REPLACEMENT (See items 1 – 4 pictured in Figure 6.0)
The LEATHER HEAD BAND COVER (item 1) is simply wrapped around the Head
Band with the edges overlapping so that the Velcro seam can be evenly pressed
together. To remove the cover, pull the top overlap away from the bottom at the
Velcro seam.
The EAR CUSHIONS (item 2) are removed by placing one or two fingers inside the
Ear Cup and under the Ear Cushion’s rigid plastic plate. Hold the Ear Cup firmly
with the other hand and pull the Ear Cushion plate until it pops out of the Cup. The
new Cushions just clip back into place under the lip around the circumference of the
ear Cup opening. Ensure the Ear Cushion plate has seated and clipped-in properly
before use.
The INNER FOAM ASSEMBLY (item 3) also supports the Earphone and care
should be taken not to damage the wiring. With the Ear Cushions removed,
carefully take out the foam wafer and pull apart the two bottom layers where the
wires enter. Carefully remove the Earphone. Place the Earphone into the new foam,
remove paper cover and press both layers together. Install foam back in cup and
replace Ear Cushion.
The WIND SOCK (item 4) is the black foam cover for the Microphone at the end of
the Mic. Boom. To remove, simply pull the Wind Sock off the end of the Microphone
and gently stretch and pull the replacement Wind Sock over the Microphone again.

HEADSET PARTS – EXPLODED VIEW
1
3
2
4
Figure 6.0
REPLACEMENT PARTS LIST
Order Code
Item No:
NSN: Description
7432300147
1 Leather Headband Cover (item 1)
7432300178-K
2 5965-66-151-5602 Cushion Kit
(Pack of 2 x item 2)
7432300174-K
3 5965-66-151-5603 Foam & Cushion Kit
(Pack of 2 x items 2 & 3)
7432300179
4 Windsock for Microphone
(Pack of 1 x item 4)
9

NOISE EXPOSURE
There is considerable medical research data now available which clearly demonstrates a
link between the loss of hearing in humans as a result of exposure to noise. The factors
which contribute to this loss of hearing are many and complex, and as the Headset user
you should discuss your requirements with suitably qualified professionals to ensure that
the headset you have selected is suitable for the type (frequencies) of noise & level of
noise you may encounter as well as the period of exposure. The chart below should be
read in conjunction with AS/NZ standard 1269.
Noise Exposure Chart
85 90 95 100 105 110 115 120 12
5
0.01
0.05
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
16
14
12
10
8
7
6
5
4
3
2
1.5
1
50
40
30
0
15
20
30
40
50
1
1.5
2
3
10
9
8
7
6
5
4
20
seconds. minutes hours
Noise Level - Continuous (L ) dB(A)
Ae
q
,T, I
DURATION OF SEGMENT (T,i)
EXCESSIVE NOISE EXPOSURE
IN THIS REGION
NOISE
DOSE
10