Checkline TI-45N - Manual (Page 9)

TI-45N Operating Instruction Guide
9
N OTES
a. When the probe is removed from the sample after a measurement, the last reading
will be stored.
b. The gauge will power off automatically after 3 minutes of non-use. To manually turn
off the power, press and hold the POW key for 3 or more seconds and then release.
c. Refer to Trouble-shooting Guide, section 8.0 if any problems occur.
TI-45N Operating Instruction Guide
16
7.0 T AKING M EASUREMENTS
After setting the gauge for the correct acoustic velocity for the material to be measured
or retaining the factory preset value of 5930 m/sec for measurement of steel, the gauge
is ready to take measurements.
A coupling fluid must be used between the probe and the sample to obtain measure-
ments. A two (2) ounce bottle is supplied with the gauge. We highly suggest using this
water soluble couplant. Long-term use of petroleum-based couplants (grease, oil, etc.),
salt water or chemical solvents will eventually damage the probe. Additional bottles of
coupling fluid are available from the gauge supplier.
1. Turn the power on by pressing the POW key.
2. Place a small amount of coupling fluid on the calibration disc located on the
face of the instrument.
3. Grasp the probe by the holding the spring-loaded centering shell and place it on
the calibration disc. Press the shell down until it contacts the surface.
4. Confirm that the calibration disc measures 0.197" (± 0.001") or 5.0 mm (± 0.01mm)
or the “Equivalent Value” as found in the Acoustic Velocity Selection Table for
non-steel materials.
5. Place a small amount of coupling fluid on the surface to be measured, press
probe onto the surface and proceed as indicated in step 3 above.
The gauge will display the thickness of the material or wall along with the Good
Coupling Indicator. The Indicator will remain on the display while the probe is in
contact with the sample.
If the Good Coupling Indicator is not displayed, then the measurement was not success-
ful and should be repeated. If this problem persists then the surface may not be in
acceptable condition for measurement. Refer to Preparing The Surface For
Measurement, section 7.2.
Good Coupling
Indicator