CEN-TECH 66400 User Manual

Digital Contact Tachometer
Item 66400
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.
Visit our website at: http://www.harborfreight.com
Copyright
©
2008 by Harbor Freight Tools
®
. All rights reserved. No portion of this manual 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 manual 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.
Specications
Display LCD 5 Digits
RPM Range 2.5 - 19,999 RPM
Accuracy ± 0.05 plus 1 RPM
Power Source
4x ‘AA’ Batteries
(Not Supplied)
Operating
Environment
32° - 104° F; 0 - 50° C
< 85% Humidity
IMPORTANT SAFETY
INFORMATION
1. When in use, this tool is in contact with rotating parts.
2. 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.
Email tech support at: tech@harborfreight.com
Manual Revised 11f

CEN-TECH 66400 Specifications

General

Model	66400
Brand	CEN-TECH
Category	Measuring Instruments
Type	Digital Multimeter
Display	LCD
Continuity Test	Yes
Diode Test	Yes
Battery Type	9V
Auto Power Off	Yes
Low Battery Indicator	Yes
Overload Protection	Yes
Current Range	200μA to 10A DC
Resistance Range	200Ω to 2MΩ
Operating Temperature	0°C to 40°C

Summary

Specifications

Display

LCD 5 Digits

RPM Range

2.5- 19,999 RPM

Accuracy

± 0.05 plus 1 RPM

Power Source

4x 'AA' Batteries (Not Supplied)

Operating Environment

32° - 104° F; 0 - 50° C < 85% Humidity

IMPORTANT SAFETY INFORMATION

Important Components and Controls

Axle

Part of the tachometer where adapters are installed.

TEST Button

Activates the measurement function.

LCD Display

Information is displayed on this screen.

MEMORY Button

Recalls last, minimum, and maximum readings.

Function Switch

Selects measurement mode: FT/MIN, M/MIN, or RPM.

Set Up

Battery Installation

Step-by-step guide to installing batteries correctly.

Installing Adapters

Instructions on fitting the correct adapter to the axle.

Operation

RPM Measurement

Procedure for measuring rotational speed in RPM.

Linear Speed Measurement

Procedure for measuring surface speed in feet or meters.

Memory Function

Assembly Diagram

Limited 90 Day Warranty