Welch Allyn TM286 Auto Tymp - User Manual User Manual

Page 51

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Directions for Use

Routine Maintenance

(during reflex) and to determine if the air pressure system is working properly. Keep a
copy of the tests for a day-to-day reference in checking the instrument.

To perform a biological check in Audiometry, select the Audiometry (AUD) mode button.
The display changes from the tympanogram format to an Audiogram format. Select
Headphone or Insert Phone. (When changing transducers, the icon for the new
transducer will flash on the LCD until the button is pushed again. The

and

buttons determine each frequency and the dB HL knob alters the intensity of each
frequency. Position the test headset so that each earphone is covering the appropriate ear
(i.e., red is right and blue is left). Select the right earphone by pressing the front panel
button labelled R and check for the following while depressing the Present bar:

Pressing the

Hz button changes to a lower frequency.

Pressing the

Hz button changes to a higher frequency.

Each frequency or tone is pure (i.e., there is no distortion or crackling sound
present).

Rotating the dB HL knob in a clockwise direction increases the intensity (louder).
Rotating the dB HL knob in a counterclockwise direction decreases the intensity
(quieter).

Since individual thresholds can shift up or down as much as 5 dB from one day to the
next, variation within this range may be considered acceptable. Variations that exceed this
range, however, are likely to reveal problems that require attention. The routine
maintenance checks described in this chapter, may suggest the source and solution to the
problem. If they do not, the instrument should receive technical service by a Welch Allyn
certified technician before further use.

Preventive Maintenance

Preventive maintenance does not require access to the interior of the instrument and may
be performed by the operator.

For the TM286, preventive maintenance consists of periodically cleaning and inspecting
the exterior of the instrument. We also recommend cleaning and inspecting the
accessories such as the probe and/or earphones. It is recommended a routine schedule is
implemented for these purposes.

Cleaning the system

Turn OFF the system power before cleaning the instrument. Do not permit solutions or
sterilization agents to seep into the electronic portions of the system. Take special care
around controls, connectors and panel edges. Do not use any abrasive cleaners.

Remove any dust from the exterior of the system with a soft brush or cloth. Use a brush
to dislodge any dirt on or around the connectors and panel edges. Remove stubborn dirt
with a soft cloth slightly dampened with a mild detergent solution or cold sterilization
agent.