14
D-0126050 rev 1 -
270+ Operating Manual
1
Clear
Clears all displayed test results
2
Signal
Switch between tone and speech testing
3
Ear
Change ear
4
Mask
Activate masking
5
Output
Select transducer to present signal
6
> 100 dB
Test above 100 dB
7
Auto
Start auto test
8
Special
Select special test
9
Menu
Change instrument settings, save and reload tests
10
Power
Switch device on or off
11a Frequency
Decrease and increase test frequency
In Speech Assessment used for ‘Yes and No’
11b Talkover/Talkback
Pressing both frequency buttons to activate talkover and talkback
12
Present
Present test stimulus
13
Store
Save measured point
2.6.
LIGHT INDICATORS
The indicators on the 270+ show the status of the selected ear and test mode.
LIGHT
LIGHT RING LEFT
LIGHT RING RIGHT
Red light: Right ear selected as test ear.
Blue light: Left ear selected as test ear.
White light: Masking
Blue and white lights: Both channels active.
2.7.
HARDWARE INSTALLATION
Connect the relevant transducers, the patient response switch and, if used, the speech and freefield with the
device, before connecting the power adapter.
The instrument is designed for continuous operation and is powered by a mains adapter. Connect the output
lead from the adapter into the
POWER
input socket on the back of the 270+.
Summary of Contents for 270+
Page 1: ...270 Operating Manual...
