Dakota Ultrasonics MMX-6 - Manual (Page 9)

MMX-6 Ultrasonic Thickness Gauge
5
The ALRM key has two functions. By holding down the ALRM key
when powering up the MMX-6, the audible beeper will be turned on or off
accordingly. After the unit has been turned on, pressing the ALRM key will
toggle the alarm mode to the on/off positions and allow the user to enter a
nominal thickness value. Refer to page 19 for details on how to use the
alarm feature.
The DUAL-MULTI key is used to toggle pulse-echo ( flaw & pit
detection ), and echo-echo ( eliminate paint & coating thickness ). This
enables the user to very conveniently switch between modes depending on
application requirements. Refer to page 20 for a complete explanation of
this feature.
The SEND key is used to send the currently displayed thickness
measurement to an external storage device via the MMX-6's RS232 port.
Refer to page 22 for an explanation of how to use this feature.