Tomey UD-800 Instruction Manual page 159

When too much cornea protective agent is applied, a
gap is formed between the biometry probe and
cornea, and the measurement result may tend to be
longer. Apply appropriate amount of cornea protective
agent.
The immersion attachment is used. (In the case of
contact mode)
Select immersion mode and take measurements.
The biometry probe is directly applied to the cornea
without using the cornea protective agent. (In the case
of immersion mode)
Use the immersion attachment or cornea protective
agent for measurement in immersion mode.
The converted acoustic velocity is not set
appropriately.
Check the setting of the converted acoustic velocity.
A different converted acoustic velocity can be set for
right and left eyes. Check the setting for both eyes.
The contact section of the biometry probe is damaged.
If damaged, immediately stop measurement and
contact your local distributor.
 Monitoring sound does not stop.
Data is captured even while the probe does not contact the eyeball.
The tip of the biometry probe is wet.
Remove drops of water.
 Monitoring sound does not go off.
The measurement sound is set to "OFF."
Set the volume to an option other than "OFF" as
described in "3.9.1 General."
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