RH520 V2.9 3/07

2

Introduction

Congratulations on your purchase of the Extech RH520 Temperature + Humidity Chart

Recorder. The RH520 measures and displays Temperature, Humidity, and Dew Point.

The remote (detachable) probe senses the ambient conditions while the LCD display

graphs and provides numerical representation of the readings. Programmable audio-

visual alarms alert the user when ambient conditions reach alarm presets. The optional

alarm module permits automatic relay switching when alarm presets are reached.

The RH520 Internal Memory can store up to 49,152 measurements for later transfer to a

PC. Careful use of this instrument 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.