User's Manual

55
HEARING SAFETY FEATURES
Audiometer
Alert situations: audible signal levels higher than 100 dB HL
(IEC 60645-1)
Safety measures:
1) Activation of “higher dB” button required to raise
intensity beyond 100 dB HL
2) Warning on test screen
3) Activation of channel "Norm. ON" function inhibited
REM
Alert situations: audible signal levels above UCL thresholds,
or above a customized value between 110 and 130 dB SPL,
registering in the auditory canal
Safety measures:
1) Warning of level higher than UCL threshold and
interruption of measurement (if threshold set at UCL)
2) Warning of level above customized threshold (between
110 and 130 dB SPL) in the auditory canal and
interruption of measurement (if threshold set at
customized value)
3) Warning if control is deactivated
SPECIFICATIONS OF INPUT TRANSDUCERS
Input
Type of connector
Electrical specifications
Power supply
DC plug 2.5mm
Centre pin +15V, outer collar negative
Patient response
button
Mono jack, 6.3mm
Switches 3V at logic input (switching
current: 10mA)
Impedance: 10KΩ
RECD speaker
6 pin DIN connector
-
Talk over
Mono jack, 3.5mm
Dynamic microphone, Electret or 200 Ω
Impedance: 47KΩ
Frequency response: 100-12KHz +/- 3dB
Electret bias: 2.2V with 2.2KΩ
Talk back
Mono jack, 3.5mm
REM probe
8 pin DIN connector
4 x omnidirectional microphone, Back
Electret Condenser
Impedance 2.2KΩ
Frequency range: 20 – 16000 Hz
Standard working voltage: 2 V
Maximum working voltage: 10V
Current draw: 0.5 mA max