Checkline TI-25P - Manual (Page 5)

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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-25P is displaying thickness
measurements, the display will hold the
last value measured, until a new meas-
urement 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-25P 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-25P 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-25P 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-25P is displaying a thickness
value in millimeters. If the displayed
thickness exceeds 199.99 millimeters,
the decimal point will shift automatical-
ly to the right, allowing values up to
1999.9 millimeters to be displayed.
IN/µs Symbol: When the IN symbol
is on, in conjunction with the /µs
symbol, the TI-25P is displaying a
sound-velocity value in inches-per-
microsecond.
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
1.8.8.8.8
+ IN MM/ µs
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11.0 A PPENDIX B: S OUND V ELOCITIES OF C OMMON M ATERIALS
Aluminum 0.2500 6350
Bismuth 0.8600 2184
Brass 0.1730 4394
Cadmium 0.1090 2769
Cast Iron
0.18000 4572
Constantan 0.2060 5232
Copper 0.1840 4674
Epoxy resin
0.1000 2540
German silver 0.1870 4750
Glass, crown 0.2230 5664
Glass, flint 0.1680 4267
Gold 0.1280 3251
Ice 0.1570 3988
Iron 0.2320 5898
Lead 0.8500 2159
Magnesium 0.2280 5791
Nickel 0.2220 5639
Nylon 0.1020 2591
Paraffin 0.0870 2210
Platinum 0.1560 3962
Plexiglass 0.1060 2692
Polystyrene 0.0920
2337
Porcelain 0.2300 5842
PVC
0.0940 2388
Quartz glass 0.2220 5639
Rubber, vulcanized 0.0910 2311
Silver 0.1420 3607
Steel, common 0.2330 5920
Steel, stainless 0.2230 5664
Stellite 0.2750 6985
Tin 0.1310 3327
Titanium 0.2400 6096
Tungsten 0.2100 5334
Zinc 0.1660
4216
Water 0.058 1473
Material Velocity Velocity
Type Inches/µs Meters/s
Notes: 1. These values are to be used only when a suitable sample of known
thickness is not available for calibrating, as slight variations in material
composition, finishing (hardening, polishing, etc.) or shape can affect the
acoustic velocity.
...
Notes: 2. “✔ ”denotes the factory default setting for acoustic velocity.
✔