12
D-0126050 rev 1 -
270+ Operating Manual
conditions than the actual use conditions no special precaution is required before use. Always ensure proper
operation of the instrument by following routine check procedures for audiometric equipment.
2.3.10.
MAINS SUPPLY OPERATION
The audiometer is designed for continuous operation and is powered by a mains adapter which is supplied
and specified as part of the equipment. If a replacement is required, please contact your Amplivox distributor.
All other connections must be made
before
connecting the output lead from the adapter into the POWER input
socket on the back of the audiometer. Switch on the mains supply - the POWER indicator on the audiometer
will illuminate green, showing that the instrument is ready for use.
The output from mains adapter is fitted with electronic circuit protection. In case of overload the adapter will
shut down. When the fault is cleared the adapter will operate as normal. However, the input to the mains
adapter is protected with a non-replaceable fuse. If this fails, the adapter will not operate.
The mains adapter is the mains disconnect device and therefore the audiometer should be positioned such
that easy access to the mains adapter is possible.
2.4.
CONNECTIONS
All connections are made to the rear panel of the audiometer as shown below.
1
MIC 1
3.5 mm jack
Operators Live Speech/External Talkover Microphone
2
Monitor
3.5 mm jack
Operators Monitor Earphone
3
Bone (Grey)
6.3 mm jack
Bone Vibrator Headset
4
Insert
3.5 mm jack
Masking Earphone
5
Right (Red)
6.3 mm jack
Air Conduction Headset (Right Ear)
6
Left (Blue)
6.3 mm jack
Air Conduction Headset (Left Ear)
7
MIC 2
3.5 mm jack
Patient Talkback Microphone
8
Power
2.5 mm DC jack
Mains AC/DC Adapter
9
Response (Black)
6.3 mm jack
Patient Response Switch
1 2 3 4 5 6 7 8 9 10 11 12 13
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