Harbor Freight Tools 66632 Automobile Parts User Manual


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SKU 66632 For technical questions, please call 1-800-444-3353. Page 3
OPERATION
Test Button
Display
Photo Source
Memory Button
Socket for
AC Adapter
Figure 2
1. Cut a 3/4” length of reective tape (in-
cluded), peel off the backing and attach the
reective tape to the object to be measured.
Note: The longer the piece of reective tape, the
easier it is to make the measurement.
Point the Tachometer’s Photo Source at the 2.
reective tape on the object, holding the tool
approximately 2” to 8” away.
Start the object turning.3.
Turning
Reective Tape
Figure 3
4. Press and hold the Test Button, keeping the
beam of light perpendicular to the reective
tape surface.
After several seconds, a reading will appear 5.
on the Display. When the reading is stable, or
near stable, note the reading on the Display
and then release the Test Butoon.
Note: If the reading fails to appear, adjust the
Tachometer’s angle so that it is perpendicu-
lar to the reective tape on the object and/or
adjust the distance between the Tachometer
and the reective tape.
After the test button is released, the maxi-6.
mum, minimum and last readings of the
measurements are stored.
Symbol Key
Low Battery Indicator:
-Batteries are low and need replacing
Maximum reading is displayed
Minimum reading is displayed
Photoelectricity mode symbol
Revolutions per minute (RPM)
Figure 4
7. To access the readings, press and release
the Memory Button repeatedly to cycle
through the readings on the Display. The
indicators above the digits will appear as
described in Figure 4.
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