RH490 V2.0 12/06

2

Introduction

Congratulations on your purchase of the Extech RH490 Precision Hygro-

Thermometer. This device measures Humidity, Air Temperature, Dew Point

temperature, Wet Bulb temperature and Grains of Water Vapor Per Pound of Air.

Advanced features include Data Hold, Auto Power Off, and MAX/MIN reading. This

meter is shipped fully tested and calibrated and with proper use will provide years

of reliable service.

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free

of defects in parts and workmanship for one year from date of shipment (a six

month limited warranty applies to sensors and cables). If it should become

necessary to return the instrument for service during or beyond the warranty

period, contact the Customer Service Department at (781) 890-7440 ext. 210 for

authorization or visit our website www.extech.com for contact information. A

Return Authorization (RA) number must be issued before any product is returned

to Extech. The sender is responsible for shipping charges, freight, insurance and

proper packaging to prevent damage in transit. This warranty does not apply to

defects resulting from action of the user such as misuse, improper wiring,

operation

outside

of

specification,

improper

maintenance

or

repair,

or

unauthorized modification. Extech specifically disclaims any implied warranties

or merchantability or fitness for a specific purpose and will not be liable for any

direct, indirect, incidental or consequential damages. Extech's total liability is

limited to repair or replacement of the product. The warranty set forth above is

inclusive and no other warranty, whether written or oral, is expressed or implied.

Copyright © 2006 Extech Instruments Corporation

All rights reserved including the right of reproduction in whole or in part in any form.