Tomey UD-600, Operator'S Manual, Page: 235 / 262

6-21
6. Troubleshooting
<Biometry function>
z z
z z z Axial length measurement cannot be taken.
Cause 1
The biometry probe is not properly connected.
Remedy
Connect the biometry probe until you hear
click sound to be locked. See "3.2.1 b) Con-
necting of the biometry probe" for details.
Cause 2
The condition is not suitable for immersion mode.
Remedy
The immersion mode allows taking data, when
the corneal echoes are within the range of
1.8 to 3.2mm. Apply the ultrasound
media(such as BSS or Ethylcellouse) to the
face of the probe so that the data can be
taken by immersion mode.
Cause 3
The probe tip is directly touching cornea with the
immersion mode without any ultrasound media.
Remedy
While setting the immersion mode, use the
immersion attachment or the gel for mea-
surement in the procedures prescribed in
"3.6.6 a) How to use the biometry probe in
the contact or immersion mode". In case of
carrying out measurement by directly touch-
ing the cornea, select it as contact mode.
z z z z z
The fixation light is OFF.
Cause 1
The fixation light is turned OFF.
Remedy
See fixation light settings "3.11.3 m) ON/OFF
switching of the fixation light for biometry
probe (Fix Light)" in order to turn it ON.
z z
z z
z
No auto measurement can be made.
Cause 1
The measurement mode is set as "Manual".
Remedy
Set the measurement mode as the auto mea-
surement. “Chin” or “Hand”. (See "3.6.3 e)
Setting of the measuring method".