General Tools and Instruments CT6235B - Manual (Page 9)

Also note that releasing the MEM button powers off the dis-
play and the instrument.
Now press the MEM button twice and
hold it. This again illuminates the display,
but now it shows the last reading you
stored, indicated by and alternating with the letters “LA”.
Finally, press the MEM button three times and hold it. This
retrieves the slowest of the three speeds you measured and
stored. This value is shown alternating with the letters “dn”,
signifying the minimum speed.
To try out other memory-related features,
you can now press the Measurement
button on the right side. Now press the
MEM button once, twice and three times
(holding it in each time) and note from the display that all
three of your stored measurements have been erased (indi-
cated by “0.0” readings for UP, dn and LA). You can confirm
this by pressing and holding the MEM button until the display
begins counting down from 20. When the count reaches 0,
the display immediately switches to showing the letters “AN”
on the left side and a number (in this case, “0”) on the right.
(The letters “AN” are an abbreviation for the Ancient Greek
word for “recall.”)
To complete this simulation exercise and put your new expert-
ise to the test, make and store a set of five simulated meas-
urements by hand-spinning the tachometer’s shaft and using
the MEM button. Then, remembering not to press the Meas-
urement button, press and hold the MEM button as many
times as needed to make the display go into countdown mode.
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