Checkline TI-45N - Manual (Page 3)

TI-45N Operating Instruction Guide
3
2.0 P RECAUTIONS
1. The probe surface is fabricated from acrylic resin and care should be taken to
insure that it is not scratched by sliding over rough surfaces. The probe should
be placed down for measurements and lifted vertically when complete. Do not
slide over rough surfaces.
2. Do not use this gauge where material temperatures exceed 140 °F (60 °C) as the
probe will be damaged. Use the CHECK•LINE Model TI-25H High Temperature
Thickness Gauge for these applications.
3. Keep the gauge free of dust (especially metal powders, carbon, etc.) as they will
damage the PC Board. Use a damp cloth to clean the gauge after use. DO NOT
USE CHEMICAL SOLVENTS OF ANY KIND.
TI-45N Operating Instruction Guide
22
A PPENDIX
The TI-45N Thickness Gauge is supplied from the factory set for an acoustic velocity
of 5930 m/sec for the measurement of steel. To measure the thickness of any other
material, the acoustic velocity must be changed. When checking the built-in calibration
sample, the gauge will display the “Equivalent Value” listed in the Table in section 6.4,
instead of 0.197" (or 5.0 mm)
ACOUSTIC VELOCITY SELECTION TABLE
Material Acoustic Equivalent Equivalent
Type Velocity Value Value Of
(meters/sec) Of Calibration Calibration Disc
Disc (Inch) Disc (mm)
Aluminum 6260 .208 5.3
Acrylic (Plexiglass) 2700 .090 2.3
Cast Iron 4400-5000 .148 - .168 3.8 - 4.3
Ceramics 10000 .332 8.4
Copper 4700 .156 3.9
Duralumin (17S) 6320 .211 5.3
Ebonite 2500 .083 2.1
Glass 5570 .185 4.7
Nickel 6040 .201 5.1
Polyethylene (Soft) 1900 .063 1.6
Polyvinyl Chloride (PVC) 2300-2500 .077-.083 1.9 - 2.1
Quartz (X cut) 5720 .191 4.9
Stainless Steel (SUS304) 5790 .193 4.9
Stainless Steel (SUS403) 6100 .205 5.2
Stainless Steel (SUS410) 7390 .246 6.2
Steel 5930 .197 5.0
Tin 3320 .110 2.8
Zinc (Zn) 4170 .139 3.5
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◆ Denotes one of the 10 preset values in Mode C.