Checkline TI-CMXDL - Manual (Page 9)

Known Coating Thickness
When the exact velocity of a coating is unknown, the user has
the option of performing a one point calibration on a sample of
the coating with a known thickness to determine the sound
velocity. It would be very handy to carry a set of mechanical
calipers to use in conjunction with the TI-CMXDL for calibra-
tion in the field:
1. Physically measure a location on a coating sample using a set
of calipers or a digital micrometer.
IMPORTANT NOTE: In PECT (pulse-echo coating) mode, the
coating sample must be coupled to metal in order to calibrate
successfully. Simply place a drop of couplant on a piece of
metal, lay the coating sample over the couplant on the metal and
proceed to step 2.
2. Apply a drop of couplant on the transducer and place the transducer in steady contact
with the coating (on metal) sample or actual test material. Be sure that the reading is
stable and the repeatability indicator, in the top left corner of the display, is fully lit and
stable. Press the MENU key once to activate the menu items tab. Press the MENU key
multiple times to tab right and the ESC key multiple times to tab left until the CAL
menu is highlighted and displaying the submenu items.
3. Use the UP and DOWN arrow keys to scroll through the
sub menu items until COATING 1PT is highlighted.
4. Press the ENTER key to display the Digits Edit Box.
5. Press the UP and DOWN arrow keys to scroll the
highlighted value.
6. Press the LEFT and RIGHT arrow keys to scroll the digit
locations.
7. Repeat steps 5 & 6 until the known thickness value is
correctly displayed.
8. Press the OK key to calculate the coating velocity and return
to the menu screen, or ESC to cancel the one point calibration.
9. Finally, press the MEAS key to return to the measurement screen and begin taking
readings.
NOTE: CHECK YOUR CALIBRATION! Place the transducer back on the calibration
point. The coating thickness reading should now match the known coating thickness sam-
ple. If the thickness is not correct, repeat the steps above.
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12.0 S ETUPS , C REATE , S TORE , E DIT & R ECALL
12.1 Introduction to Setups
Often times, users are faced with a variety of tasks and applications that are sometimes
similar, but often times very different. With a standard thickness gauge, the user would
have to recalibrate for each individual application respectively. With all the features of th
TI-CMXDL, the number of potential applications also increases based on ability alone.
This is primarily in reference to the addition of those very difficult applications, where a
standard thickness gauge would not be feasible, or capable of accomplishing the tasks.
The increased number of features and parameters also adds to the overall setup time, or
amount of time to set up marginal applications with perfection and understanding. Becau
of the additional time involved, the TI-CMXDL has been equipped with the ability to sa
these setups to memory and be recalled at any time. The TI-CMXDL can store up to 64
custom setups. These setups can be bi-directionally transferred to and from a PC.
Therefore, the user can save as many setups as necessary for all their individual applica-
tions requirements. This saves a great deal of time and knowledge for future inspections
the same job or project. This feature also eliminates error between two or more users du
ing the setup and calibration process.
12.2 Opening a Setup
Once user setups are saved (refer to Section 11.3, p. 47), they are opened (recalled for u
using the following procedure. Please make sure that the correct probe is connected and
matches the probe selection stored in this setup.
1. Press the MENU key once to activate the menu items tab.
Press the MENU key multiple times to tab right and the
ESC key multiple times to tab left until the SETUP menu is
highlighted and displaying the submenu items.
2. Use the UP and DOWN arrow keys to scroll through the
sub menu items until OPEN is highlighted.
3. Press the ENTER key to display the Setup List Box.
4. Use the UP and DOWN arrow keys to scroll through the
setups until the target setup is highlighted.
5. Press the ENTER key to activate the confirmation screen.
6. Press the OK key to load the setup
from memory.
7. Press the MEAS key to return to the
measure screen.
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