Welch Allyn TM286 Auto Tymp - User Manual - Manual (Page 30)

26 Operation Welch Allyn TM286 Auto Tymp
is selected along with 1000 Hz, the label "I 1000" will appear at the top of the first
column of numbers for reflex and "I 2000" will appear directly below it. If 500 is also
selected, the screen will be modified so that "I 500" appears at the top of the first
column of reflex numbers, "I 1000" will appear directly below "I 500" and "I 2000" will
appear at the top of the second column of reflex numbers and directly to the right of "I
500" and so on.
To change the default setting, see “Program Mode” on page 33 of this manual.
Exit tympanometry/reflex
To exit Tymp Only Mode:
Select Tymp Reflex or Audiometry Mode. Note that the appropriate screen appears on
the display.
To exit Tymp/Reflex Mode:
Select Tymp or Audiometry Mode. Note that the appropriate screen appears on the
display.
Audiometry Test Sequence
To enter the Audiometry mode
1. Press the AUD button. Note that the display changes from a Tympanogram or Tymp/
Reflex format to an audiogram format.
Transducer Selection
Select the transducer to be used for the Audiometric testing. Press to select
headphones or to select insert phones. The LCD will flash a picture of the
transducer choice until the transducer button is pressed a second time. With one set of
output jacks for the transducers, two buttons allow separate calibration files to be
accessed. Be sure that the transducers that are connected to the back of the TM286 are
the same as the selected transducer from the front panel. If Headphones are selected, a
will appear in the center of the LCD. If Insert Phones are selected, a will appear
in the center of the LCD.
The settings for the frequencies available during audiometry are defined in the Program
mode as 125 through 8000 Hz (normal) or 500 through 6000 Hz (narrow). The factory
default setting is the normal frequency range of 125 through 8000 Hz. Upon entering the
audiometry mode, the starting frequency is automatically selected to be a steady signal of
1000 Hz at 0 dB HL.
The signal format can be temporarily changed from steady (continuous) to a pulsed or
frequency modulated tone. These alternative tone formats remain selected until a
different test is selected. The display indicates a continuous bar when steady is
selected, a dashed bar when pulsed is selected, and the letters FM when frequency
modulation is selected.
The audiometry defaults to testing the right ear first. To start with the left ear, it is
necessary to press the L button after entering the audiometry mode. Since the
Note The second or third intensity level presentations occur only if a response is not
detected at the prior intensity level. The test is over when the green lamp on the
probe is no longer illuminated.