Check-line TI-CMX User Manual page 25

C. Velocity – The material velocity value the TI-CMX is currently using or calibrated for.
Displayed in English or Metric units, depending on the what units the gauge is set for.
D. Feature Status Bar – Indicates the features currently enabled and in use in the
following order:
• Measurement Mode
• Differential Mode
• High Speed Scan Mode
• Alarm Mode
• Gain Setting
E. Digital Material Thickness Value – Extra large font size for viewing ease.
F. Scan Bar – Another view of material thickness in a deflection style horizontal bar. This
is another visual tool that would enable the user the ability to see thickness changes during
high speed scans from flaws and pits.
G. Units – The current measurement units being used (English, Metric).
H. Coating Thickness Value – Displays the actual thickness of any coating adhered to a
metallic material surface (PECT Mode), or a coating adhered to a non-metallic surface (CT
Mode).
I. Minimum Material Thickness – Part of the Alarm feature. Displays the
minimum thickness value found during a scan.
J. Maximum Material Thickness – Part of the Alarm feature. Displays the maximum
thickness value found during a scan.
B-Scan
The B-Scan displays a time based cross section
view of test material. This is a visual tool that
enables the user to see the contour of the blind,
or underside, surface of a pipe or tank applica-
tion. It is very similar to a fish finder. If a flaw
or pit is located during a scan, the B-Scan will
draw the pit on the screen.
The solid black rectangle in the diagram at
location K represents the cross section, or side
view of the material. The B-Scan view draws
at a rate of 7 seconds per screen from right to
left. Also notice at location K, the pits and
corroded bottom surface of the material.
It's important to note that the measurement range on the display be set wide enough, so
that the maximum thickness of the material can be viewed on the display. Using the dia-
gram above, if the material thickness was actually 1.75", the underside of the material
would not be viewable according to the current range at 0.00" – 1.00". All the user would
see is a black screen from 0.00" – 1.00" with no view of the bottom contour at 1.75".
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B-Scan View
2. Assuming the TI-CMX recognized the probe and the OK key
was pressed, the TI-CMX will advance to a Zero Probe menu.
If the transducer was identified as a special transducer capable
of measuring coating thickness, a menu will be displayed
allowing the user the ability to toggle the coating thickness
display on/off as follows:
3. Press the UP and DOWN arrow keys to toggle the coating
option on/off.
4. Wipe all couplant from the transducer face and proceed to the
Probe Zero section that follows.
In this second example the transducer was not identified and will force the user to sel
the transducer type from a predefined list of transducers:
1. Press the OK or ESC keys to display the factory list of
transducer types (by diameter and frequency).
2. Press the UP and DOWN arrow keys to scroll through the
transducer list until the appropriate type is highlighted.
3. Press the ENTER key to select the transducer type and
display overwrite existing probe screen.
4. Press the OK key to overwrite the existing probe type with
the newly selected probe type. The zero probe screen will be
displayed. Proceed to the zero probe section that follows.
6.2 Probe zero
The next step is to perform a probe zero. The zero function is
a very important and necessary function that must be done prior
to calibration. It should be done on a regular basis. In fact, the
TI-CMX has been programmed to force this issue at regular
intervals during operation if it hasn't been done. If the TI-CMX
is not zeroed correctly, all the measurements taken may be in
error by some fixed value. When the TI-CMX is using the auto
zero (electronic zero), the TI-CMXº can be in any measurement
mode. However, when the manual zero is being used, the TI-CMX must be in pulse-ech
mode in order to perform the zero. The TI-CMX will also see to it that this occurs by
simply forcing the gauge into this mode when zero. Therefore, if the TI-CMX is in the
echo-echo measurement mode and a manual zero is being performed, the TI-CMX will
the gauge into pulse-echo mode automatically before performing the zero. While this is
very convenient feature of the TI-CMX, the user should be sure to check the measureme
mode following calibration to be sure the TI-CMX is in the desired mode. The following
steps outline both of these techniques.
The TI-CMX is equipped with two zero options:
1. Off Block Zero (Automatic Probe Zero) – When this feature is enabled the TI-CMX
will do an electronic zero automatically, eliminating the need for a zero disk or block
2. On Block Zero (Manual Probe Zero) – When this feature is enabled the transducer
must be placed on the probe zero disk (battery cover located on the top of the unit.
Both zero procedures are outlined as follows
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