Extech Instruments TKG100 User Manual page 25

2. After three seconds the gauge automatically
begins to zero the transducer. During the delay
line calibration a screen appears displaying the
message "Performing Auto Zero".
3. A warning message will appear on the display
screen if the delay line is below the acceptable
limit for accurate thickness measurements. You
will need to replace the transducer or select the
F1 key to acknowledge the warning message
and continue using the same transducer, which
may have a worn surface.
4. After three seconds or after acknowledging the
warning message, the display shows the
instrument parameters for 3 seconds before
going to
Measurement
mode.
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