General Tools and Instruments CT6235B - Manual (Page 10)

Note that because you have stored five measurements, the
display will read “AN 5” once the countdown reaches zero. If
you release the MEM button and then press and hold it again,
the display will first read “1” and then the value of the first
of the five measurements you stored. If you release the MEM
button and then press and hold it again, the display will then
show “2”, followed by the value of your second measure-
ment. Release, press and hold again, and the display will
show “3”, followed by the value of your third measurement.
By repeating this sequence, you can retrieve up to 96 meas-
urements in the order in which they were stored. Once all of
the stored measurements have been displayed, the tachome-
ter will return to the mode in which pressing the MEM button
once, twice or three times calls up the minimum, maximum
and last values of the set of measurements you have stored.
With this simulated experience under your belt, you can now
confidently measure the rotational speed of a spinning motor or
generator shaft, or the linear speed of virtually any conveyor belt.
MEASURING ROTATING SPEEDS
To measure the speed of a rotating shaft, first make sure
that the black plastic sleeve (see Fig. 1 (B) ) is installed on the
tachometer’s shaft (callout C of Fig. 2), with the slot of the
sleeve over the shaft’s metal pin. To measure the speed of a
motor’s or generator’s shaft with a hollowed (concave) end,
determine which of the two supplied cone-tipped rpm
adapters (see Fig. 1) fits more snugly in the hollow. Push the
flat end of that adapter into the end of the plastic sleeve. Then
slide the function switch on the front panel (callout E of Fig.2)
to the “rpm” position.
10