Tomey UD-600, Operator'S Manual

Page: 134 / 262

3-106
3.6.7 Measurement
„ „ „ „ „
Make sure before taking measurement that the converted
sound velocity has been set as desired, since the con-
verted sound velocity has direct influence on measure-
ment data.
„ „
„ „ „ Make sure also before measurement that the settings of
contact mode and immersion mode have been set prop-
erly. As for the immersion mode, the protective media
applied between the eye contact part of the probe and the
cornea shall be in a range of approximately 2.2 to 5.0mm.
„ „ „ „ „ Care must be taken not to apply an excessive pressure to
the cornea.
In case of measuring with the chin rest, care must be
given not to apply an undue pressure to the cornea
which exceeds the slider moving range.
Do not also apply an excessive amount of the protective
media for cornea, which may otherwise affect measure-
ment data.
„ „
„ „
„
The auto measurement function is a sub-function which
makes measurement easy, but is not intended for clinical
evaluation for practical application.
„ „ „ „ „ In case of measuring for a new patient, always press the
NEW key to delete all the data for previous patient. Mea-
surement for a new patient without deleting data taken for
the previous patient, data for the new patient may be dis-
ordered with those taken for the previous patient.
a) Auto measurement (Hand/Chin)
<Hand measurement>
In the hand measurement, 15 pieces of measured data which
satisfy the waveform recording conditions are taken and the
data which are within the range of ±0.2mm to the average value
are displayed in the display screen. The message of "ERROR"
is displayed if measured data are largely fluctuated out of the
allowable range.
The error message in this case may have been caused by im-
proper probe application. Press the Retake key to re-take mea-
surement. See "3.6.9 b) Deletion of measured data for single
eye (Preparation for re-measurement for identical patient)".
3.6 Biometry