Maintenance; Calibration And Repair Services - Extech Instruments RH390 User Manual

Maintenance

Cleaning and storage
1. The meter should be cleaned with a damp cloth and mild detergent when
necessary. Do not use solvents or abrasives.
2. Store the meter in an area with moderate temperature and humidity (refer to
the operating and storage range in the specifications chart earlier in this
manual).
Battery Replacement
When the battery power falls low, the battery symbol will appear on the LCD.
Replace the 9 Volt battery by removing the Philips head screw holding the rear
battery compartment cover to access the battery compartment. Ensure that the
compartment cover is securely fastened when finished.

Calibration and Repair Services

Extech offers repair and calibration services for the products we sell. Extech
also provides NIST certification for most products. Call the Customer Service
Department for information on calibration services available for this product.
Extech recommends that annual calibrations be performed to verify meter
performance and accuracy.
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User's Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Copyright © 2005 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
Support line (781) 890-7440
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RH390 V2.0 03/05