Checkline TI-25DL-MMX - Manual (Page 15)

– 15 –
6 .0 QU I CK START I N ST RU CT I ON S — ST EEL T H I CK N ESS
These Quick Start procedures are intended for those applications where the thick-
ness of steel is to be measured. If a material other than steel will be measured, the
gauge must be calibrated for use on this particular material. Refer to Sections 5.0
for additional details.
Quick Start Instructions
1. Turn on the power by pressing the ON/OFF key.
2. Plug the probe cable into the receptacle at the top of the gauge.
3. Place a drop of coupling fluid on the built-in Probe Zero Plate.
4. Grasp the probe and place it on top of the Probe Zero Plate.
Apply moderate pressure to the top surface of the probe with
your index finger or thumb to stabilize the probe and to keep
the wearface seated flat against the measurement surface.
5. The display will show some thickness value and the Stability Indicator
will have most of its bars illuminated.
6. While keeping the probe on the Probe Zero Plate, press the PROBE 0 key.
The display will show a value that can be recorded for future use.
7. Remove the probe from the Probe Zero Plate. The gauge is now ready to
perform thickness readings on steel samples.
8. Place a small amount of coupling fluid on the steel surface to be
measured and proceed as explained in step #4 above.
9. The gauge will display the thickness of the steel wall along with the
Stability Indicator showing the relative stability of the reading. If fewer
than five (5) bars are illuminated, the thickness reading displayed is most
likely inaccurate.
Notes
a. When the probe is removed from the sample after a measurement, the
last reading will be retained on the display.
b. Occasionally, a small film of couplant will be drawn out between the
probe and the surface as the probe is removed. When this happens, the
TI-25DL-MMX may perform a measurement that is larger or smaller than it
should be. This phenomenon is obvious when one thickness value is
observed while the probe is in contact with the material, and another
value after the probe is removed.
c. The gauge will automatically power off after 5 minutes of non-use.
– 18 –
1 1 .0 D U AL -M U LT I M ODE
Often times users and inspectors in the field are faced with coated materials such
as pipes and tanks. Typically inspectors will need to remove the paint or coating
prior to measuring, or allow for some fixed amount of error introduced by the
paint or coating thickness and velocity. An A-Scan scope with a special echo-echo
mode is generally used in order to accurately perform measurements through
paints and coatings. However, In order to inspect for blind wall pitting and inter-
nal flaws, both echo-echo (thru-paint / coatings), and pulse-echo (locate flaws &
pits) modes are needed. Special high damped dual element transducers are also a
must when performing inspections using both modes without an a-scan scope for
verification. A highly damped transducer rings for a much shorter time, allowing
the TI-25DL-MMX to measure thinner material thicknesses in echo-echo mode.
This same transducer is equally effective when used in pulse-echo mode,
eliminating the need to use different transducers for each mode. The new
TI-25DL-MMX gives you all these features in a simple to use, one button toggle,
digital thickness gauge. The following steps outline the procedure for setting up
this feature:
1. Press ON/OFF key to power up the TI-25DL-MMX.
2. Press MODE key to activate features and settings.
3. Press the UP or DOWN arrow keys to scroll to GAtE.
4. Press the SEND key to toggle between modes ( E-E, P-E).
5. Press the MODE key once again to return to measurement mode.