Welch Allyn TM 262 Auto Tymp - User Manual - Manual (Page 43)

Revised 4/11/08 3-9
Operation
1. Slip the appropriate size eartip onto the nose cone of the probe, making sure the rounded
tip of the eartip sits flush with the tip of the nose cone (Figure 4).
Figure 4: Positioning the eartip
2. Move any hair away from the ear and pull upward and back on the pinna of the ear on an
adult (pull downward and back on the pinna of a young child.) This tends to straighten out
the ear canal and ensure better results. Keep the pinna in this position throughout the test
sequence.
3. Make sure that the green lamp on the probe is blinking.
4. Position the probe up against the entrance of the ear canal, applying a gentle pressure to
maintain a tight seal (Figure 5).
Figure 5: Positioning the probe.
5. Watch the probe lamp. As soon as a good seal is obtained, the blinking green lamp will
change to a steady glow and remain steady while the test is in progress.
6. Once the test sequence is over, all lamps on the probe will be turned off and the test result
can be viewed on the instrument display before printing it out. It is now possible to
remove the probe from the ear canal.
7. Note that the green lamp is now blinking again, signifying that you can run another test.
Should you run into difficulty during the test, the probe lamps will inform you of a
problem as follows:
• Green lamp: Still blinking - seal has not been obtained to initiate the test sequence.
• Orange lamp: The ear canal is not properly sealed and a large pressure leak exists.
• Yellow lamp: The probe tip is occluded with cerumen or you are pressing too hard
against the ear canal so that you have collapsed the canal at the tip of the probe.
In all cases, it is best to remove the probe, examine the tip for cerumen and clean it if
necessary. A change of eartip size may also be appropriate. Start the test again.