Welch Allyn MicroTymp Operating Instructions Manual page 12

1.5
0.5
The admittance measurement (Peak Ya) has exceeded the scale
maximum (1.5 mmho). Points which are over the limit are plotted at
0 mmho.
The test cannot progress because the measured admittance is less
than 0.2 mmho. This can be caused by:
probe tip lodged against canal wall
l
ear canal occlusion
l
collapsed ear canal
l
extremely small ear
l
Repositioning probe tip will usually alleviate this condition.
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