18
Screw the helmet adapter to the helmet. Unscrew the knurled screw to open
the bracket slightly, thus enabling it to be slid easily over the rim of the hel-
met. Arrange the helmet adapter in such a way that the side slots of the tube
point towards the sound inlet apertures on the helmet Now tighten the knurled
screw.
8.3.4 Assembling to the MSA Galett Supra F1S
The Ex-TRA 300 headset with Supra adapter is a special receive/transmit
headset set for the MSA Galett Supra F1S and Supra S F1SA helmet. The
bracket for the Ex-TRA 300 headset with Supra adapter is a specially machi-
ned component.
Grasp the bracket in your right hand, you can now easily insert this into the
designated fixture at the right inner side of the helmet. The helmet can be
removed in seconds by loosening the watertight plug connection between the
receive/transmit unit and the transmit button. The headset upper part remains
attached to the helmet.
8.3.5 Application
After assembling the helmet bracket insert the microphone/receiver unit into
the helmet adapter. To do this hold the helmet adapter firmly and press the
microphone/receiver unit on the aluminium sleeve into the adapter.
Arrange the microphone/receiver unit so that the cable entry point of the alu-
minium sleeve is located on the outer side of the helmet adapter. Pay attention
to the speaker side of the goose neck microphone. An arrow (TALK), which
indicates the speaker side of the microphone, is located on the windscreen.
This should always point towards the mouth. Only by doing this is optimal
speech transmission ensured. The distance between the mouth and micropho-
ne should be approx. 2 cm.
Now connect the set‘s radio connector to the jack on the radio unit. Only
switch on the radio unit when the Ex-TRA 300 fire brigade headset has been
connected correctly.
CAUTION
Check the receiving volume every time before using the headset; adjust if
necessary. Signals that are too loud can permanently damage your hearing.
Press the PTT button to transmit. The radio unit switches from receive to
transmit. Release the transmit button after transmitting your message. The
radio unit once again reverts to the receive mode.
9. Repair
