Checkline TI-25S - Manual (Page 5)

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The BACKLIGHT key switches the display backlight between three avail-
able settings. OFF will be displayed when the backlight is switched off.
AUTO will be displayed when the backlight is set to automatic mode, and
ON will be displayed when the backlight is set to stay on. In the AUTO
setting, the backlight will illuminate when the TI-25S is actually making a
measurement.
3.2 The Display
Numerals: The numeric portion of the
display consists of 4 complete digits
preceded by a leading “1”, and is used
to display numeric values, as well as
occasional simple words, to indicate
the status of various settings. When
the TI-25S is displaying thickness
measurements, the display will hold the
last value measured, until a new measure-
ment is made. Additionally, when the
battery voltage is low, the entire display
will begin to flash. When this occurs, the
batteries should be replaced.
Stability Indicator: These 8 vertical
bars form the Stability Indicator. When the
TI-25S is idle, only the left-most bar and
the underline will be on. When the gauge
is making a measurement, six or seven of
the bars should be on. If fewer than five
bars are on, the TI-25S is having difficulty
achieving a stable measurement, and the
thickness value displayed will most likely
be erroneous.
IN Symbol: When the IN symbol is on,
the TI-25S is displaying a thickness value
in inches. The maximum thickness that
can be displayed is 19.999 inches.
MM Symbol: When the MM symbol is
on, the TI-25S is displaying a thickness
value in millimeters. If the displayed
thickness exceeds 199.99 millimeters, the
decimal point will shift automatically to
the right, allowing values up to 1999.9
millimeters to be displayed.
1.8.8.8.8
+ INMM/ µs
1.8.8.8.8
+ INMM/ µs
1.8.8.8.8
+ IN MM/ µs
1.8.8.8.8
+ IN MM / µs
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An additional important consideration when measuring laminates is that
any included air gaps or pockets will cause an early reflection of the
ultrasound beam. This effect will be noticed as a sudden decrease in thick-
ness in an otherwise regular surface. While this may impede accurate
measurement of total material thickness, it does provide the user with
positive indication of air gaps in the laminate.