Dakota Ultrasonics MMX-6 - Manual (Page 25)

MMX-6 Ultrasonic Thickness Gauge
21
However, In order to inspect for blind wall pitting and internal 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 MMX-6 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 MMX-6 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:
Dual-Multi Mode
1) Press ON/OFF key to power up the MMX-6.
2) Press the DUAL-MULTI key to toggle between E-E (echo-echo)
thru-paint/coatings mode and P-E (pulse-echo) flaw and pit mode.
3) The MMX-6 is now ready to perform measurements in the current
mode setting.