install the surface speed wheel directly onto the instrument’s
metal shaft.
Cradling the tachometer in your right hand and pressing and
holding the
Measurement
button, roll the wheel across
the length, width or depth of the object you wish to measure.
The displayed value represents the dimension measured, in
meters. Measurements made in this mode of operation cannot
be stored, and disappear from the display when the
Measurement
button is released.
MAKING RPM MEASUREMENTS IN
NON-CONTACT MODE
To use the PCT2236B to make non-contact rpm
measurements, you must first remove the black plastic
housing at the top of the instrument that covers the laser light
source and lens.
To prepare to remove the housing, first remove the black
plastic sleeve and any rpm adapter attached to it (callout B of
Fig. 2) from the tachometer’s shaft (callout C). Then remove
the Phillips head screw securing the housing via a flange to
the back of the tachometer. Next, carefully lift both plastic
flanges (front and back) that keep the housing in place. Once
you have unsnapped the housing, pull it up and over the
tachometer’s shaft and place it to one side. Note that when
you now press the
Measurement
button, a red laser light
shines out of the top of the PCT2236B.
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