13
and then the display will look like example #1:
Note:
In example #1, the
Pachette 2
was pre-configured to obtain 25
measurements with standard deviation enabled. See section V for configuration
details. If standard deviation is disabled the display will look like example #2:
Avg of 25 = 540u
Std Dev = 0.3u
Meas #21 = 540u
Avg of 25 = 541u
The top line of the display in example #1 shows the average of the 25
measurements (in microns). The top line of the display in example #2 shows the
thickness of Measurement #21. All thickness measurements are based on a
corneal velocity of 1640 m/sec. The bottom line of the display in example #1
shows the standard deviation of the 25 measurements. The bottom line of the
display in example #2 shows the average of the 25 measurements.
6. To display and review each measurement and the standard deviation (if enabled),
use the
↑
or
↓
keys. If any measurement seems questionable to the operator, it can
be erased from memory by pressing the
DELETE MEAS
key. The standard
deviation will be updated with each deletion.
7. After the measurements have been reviewed, the operator can take more
measurements to replace the ones that were deleted or just accept the ones that
remain. In either case, the total average and standard deviation will be updated
accordingly.
Note:
Once the measurement memory is filled (i.e. 25 measurements have been
taken when the
Pachette 2
was pre-configured to obtain 25 measurements), no
more measurements can be taken unless a measurement is deleted or all
measurements are cleared from memory.
8. To begin a new measurement sequence, press the
CLEAR
key to erase all
measurements and re-initialize the
Pachette 2
. Measurements are also erased from
memory whenever the unit is turned off.