Instruction manual

25
 e display of one of four horizontal bars located along the
lower border of the LCD block indicates the statistical reli-
ability of the averaged measurement. For example, if the 5%
bar is displayed, the standard deviation of the valid measure-
ments is 5% or less of the number shown.
If the reliability measure is 20% or > 20%, a repeat measure-
ment is recommended.
A single row of dashes [- - - -] indicates that the instrument
is activated.
Two rows of dashes [====] followed by a “beep” indicates
that the instrument is ready to take measurements.
“
CAL
” indicates that the instrument is in the process of cali-
bration check or the instrument needs to undergo calibration
check procedure. If “CAL” is displayed following a long beep
and “- - - -”, the latter is the case. A “Good” calibration check
must be obtained.
“
Lob
” indicates the need to replace both batteries prior to
using the instrument (see Section 3).
“
UP
” indicates that the instrument is being calibrated and
the probe tip should be turned from pointing down to point-
ing up.
“
Good
” indicates the calibration check procedure was suc-
cessful. A er two “Good” calibration checks, the Tono-Pen
XL unit is ready for use in patient examinations.
“
bAd
” indicates the calibration check procedure was unsuc-
cessful and must be repeated.