Welch Allyn TM286, Directions For Use Manual

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Directions for Use Routine Maintenance 49
The O-Ring
There is an O-Ring seated at the end of the threads on the probe. As a preventative
maintenance measure, and to ensure that the nose cone of the probe unscrews easily, do
not clean or remove the lubricant from the O-Ring. If the O-Ring appears to be void of any
lubricant, or if the nose cone itself was difficult to remove, apply a high-quality synthetic
lubricant such as those considered "food-grade." Refer to
“O-Ring care” and apply as
described in the instructions that follow.
Figure 18. O-Ring care
1. Place a small drop of lubricant at the front outer surface of the O-Ring.
2. Using a finger or a cotton swab, spread a thin layer of lubricant completely around the
front and outer surface of the O-Ring. Ensure that no lubricant spreads into the
threaded area of the nose cone. Only a thin layer of lubricant is necessary. Excessive
application or build-up may affect test results.
The probe wire
Inside the probe body, there is a metal tube that contains a wire required for cleaning
purposes.
1. Carefully remove this wire from the metal tube (See “Probe wire removal” below).
This will pull any cerumen out of the metal tube.
Figure 19. Probe wire removal
2. Examine the wire for cerumen.
3. If necessary, clean the wire with a lint-free tissue.
4. Reinsert the wire into the metal tube and push it in as far as it can go.
A: Cotton swab
B: Lubricant
C: O-Ring (enlarged for detail)
Note
The wire must be inserted into the metal tube for the instrument to function
properly.