Harbor Freight Tools 66632 User Manual

Digital Photo Sensor

Tachometer

Item 66632

INSTRUCTIONS AND

PRECAUTIONS

Visit our website at:

http://www.harborfreight.com

Read this material before
using this product.
Failure to do so can result
in serious injury.
SAVE THIS MANUAL.

When unpacking, make sure that the
product is intact and undamaged.
If any parts are missing or broken,
please call 1‑800‑444‑3353
as soon as possible.

Copyright© 2009 by Harbor Freight Tools®.
All rights reserved. No portion of this document
or any artwork contained herein may be
reproduced in any shape or form without the
express written consent of Harbor Freight
Tools. Diagrams within this document may
not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly
from the product described herein. Tools required
for assembly and service may not be included.

For technical questions,

please call 1‑800‑444‑3353.

Manual Revised 11g

Specications

Set Up

Display LCD 5 Digits

RPM Range 6 ‑ 99999 RPM

Accuracy ± 0.05% +1 RPM

Power
Source

Operating
Environment

Includes Reective Tape

(4) ‘AA’ Batteries or
6VDC (neither included)

32° ‑ 104° F,
< 85% Humidity

Important Safety Information

1. When in use, this tool is
near rotating parts.

Do not touch rotating parts.
Do not wear loose clothing when
working with rotating parts.

Contain hair, jewelry and any item that
may become entangled in rotating part.

2. This product is not a toy. Do not allow
children to play with or near this item.

3. Position batteries in proper polarity and
do not install batteries of different types,
charge levels, or capacities together.

4. Use as intended only.

5. Inspect before every use; do not use
if parts are loose or damaged.

6. Wear ANSI‑approved safety
goggles when working.

7. Maintain product labels and
nameplates. These carry important
safety information. If unreadable
or missing, contact Harbor Freight
Tools for a replacement.

Before rst use, remove clear

protective covering from Display.

Battery Installation

Note: Install batteries before

use and replace the batteries
when the Low Battery Indicator
(see Figure C) appears.

1. Remove Screw and Battery
Cover on back of Tachometer.

Figure A: Battery Compartment

2. Install 4 ‘AA’ batteries in battery
compartment, matching polarity
markings inside battery case.

3. Replace Battery Cover and
Screw. Do not overtighten.

Note: This tool may be used with a
6VDC power adapter instead.

Page 2 For technical questions, please call 1‑800‑444‑3353. SKU 66632

Operating Instructions

Read the ENTIRE IMPORTANT
SAFETY INFORMATION section

at the beginning of this
document including all text under
subheadings therein before set up or use
of this product.

1. Cut a 3/4″ length of reective tape

(included), 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. However, the tape must
not wrap all the way around the object.

2. Point the Tachometer at the reective

tape on the object, holding the tool

approximately 2″ to 8″ away.

3. Start the object turning.

4. Press and hold the Test Button,

keeping the tachometer perpendicular

to the reective tape surface.

Reective Tape

Note: If the reading fails to appear,
adjust the Tachometer’s angle so that it is

perpendicular to the reective tape on the

object and/or adjust the distance between

the Tachometer and the reective tape.

RPMMAX MIN PHOTO

Figure C: Display

Table A: Symbol Key

Low Battery Indicator;
batteries are low and need replacing

MAX Maximum reading is displayed

MIN Minimum reading is displayed

PHOTO Photo‑electricity mode symbol

RPM Revolutions per minute (RPM)

After the test button is released,

the maximum, minimum and last
measurements are stored.
To access previous measurements,
press and release the Memory
Button repeatedly to cycle through
the measurements. The indicators
above the digits will appear
as described in Figure C.

Spinning

Shaft

Figure B: Taking Measurement

5. After several seconds, a reading

will appear on the Display.
When the reading is stable, or almost
stable, note the reading on the Display
and then release the Test Button.

Page 3For technical questions, please call 1‑800‑444‑3353.SKU 66632

Record Serial Number Here:

Note: If product has no serial number, record

month and year of purchase instead.

Limited 90 Day Warranty

Note: Replacement parts are not

available for this item.

Harbor Freight Tools Co. makes every effort
to assure that its products meet high quality
and durability standards, and warrants to the
original purchaser that this product is free
from defects in materials and workmanship
for the period of 90 days from the date of
purchase. This warranty does not apply to
damage due directly or indirectly, to misuse,
abuse, negligence or accidents, repairs or
alterations outside our facilities, criminal
activity, improper installation, normal wear
and tear, or to lack of maintenance. We
shall in no event be liable for death, injuries
to persons or property, or for incidental,
contingent, special or consequential
damages arising from the use of our product.
Some states do not allow the exclusion
or limitation of incidental or consequential
damages, so the above limitation of
exclusion may not apply to you. THIS
WARRANTY IS EXPRESSLY IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS.

To take advantage of this warranty, the
product or part must be returned to us
with transportation charges prepaid. Proof
of purchase date and an explanation
of the complaint must accompany the

merchandise. If our inspection veries

the defect, we will either repair or replace
the product at our election or we may
elect to refund the purchase price if
we cannot readily and quickly provide
you with a replacement. We will return
repaired products at our expense, but if
we determine there is no defect, or that
the defect resulted from causes not within
the scope of our warranty, then you must
bear the cost of returning the product.

This warranty gives you specic legal

rights and you may also have other
rights which vary from state to state.

3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • [phone]