When the “IN” indicator is illuminated,
the TI-25M is displaying a wall thickness
measurement in INCH units.
When the “MM” indicator is illuminated, the
TI-25M is displaying a wall thickness measure-
ment in MM units.
When the “IN” and the “µs” indicators are
illuminated simultaneously, the TI-25M is
displaying an acoustic velocity in inches per
microsecond.
When the “M” and the “s” are illuminated
simultaneously, the TI-25M is displaying an
acoustic velocity in meters per second.
3.6 Probe ZeroPlate
When first connecting the probe supplied with the TI-25M, the user should
perform a “Probe Zero” as described in Section 4.3. The Probe Zero Test
Plate is used for this task. It is located on the top edge of the gauge as
shown in the photo below. It also serves as the battery compartment cover
Note: The thickness of this plate is not imporatnt, and it should not be
used as a Calibration Test Plate. A precision 4-step Test Block is optionally
available for this purpose.
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