General Tools and Instruments CT6235B - Manual (Page 12)

Set the function switch to the “m/min” position. Then,
cradling the tachometer in your right hand, press the edge of
the surface wheel against the moving object whose linear
speed you wish to measure. Note that the circumference of
the wheel has a 1/8-in.-wide slot into which wire, cable or
rope of that diameter fits snugly.
Taking care to keep the tachometer perpendicular to the mov-
ing conveyor, use the function and MEM buttons to make and
store as many measurements of linear speed as you wish.
Linear speed measurements of moving objects obtained by
placing them in contact with the outer diameter of the surface
speed measurements are accurate as displayed. However, to
compensate for the smaller inner diameter of the wheel
within its slot, measurements made by placing wire, cable or
rope within the slot should be multiplied by 0.9.
MEASURING SURFACE DIMENSIONS
The CT6235B can also serve as a metric ruler. To operate it
in that mode, move the function switch to the “m” position
and install the surface speed wheel directly onto the instru-
ment’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 can-
not be stored, and disappear from the display when the
Measurement button is released.
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