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Dakota Ultrasonics
7) The zero probe warning screen will be displayed. Press the OK key,
followed by pressing the MEAS key to return to the main measurement
screen and proceed to the probe zero section that follows.
6.2 Probe zero
The next step is to perform a probe zero.
and periodically performed during an inspection to account for temperature
variations. If the MMX-7 is not zeroed correctly, all measurements may be in error by
some fixed value. In order to perform a zero, the gauge must be set to pulse-echo
measurement mode. If the MMX-7 is currently set to echo-echo mode, the menu
item "transducer zero" will be grayed out and inactive.
The procedure to perform a zero is outlined below:
1) Apply a drop of couplant on the transducer and place the transducer in
steady contact with the probe zero disk at the top of the gauge.
This must be done prior to calibration,
Probe Zero
30
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