Model 380652 Version 3.0 June 2005 5
Support line (781) 890-7440
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
Measurement Considerations
The core of the current jaw may retain magnetism after use. If this happens the display
may not reach zero when adjusting the DCA zero dial. To correct this, either:
a. Change the direction of the measured DC current, or
b. Forcefully snap the jaws open and close several times.
Data Hold
While taking measurements slide the Off/On/hold switch to the Hold position to freeze the
displayed reading. To return to normal operation, slide the switch to the ON position.
Maintenance
Battery Replacement
When the battery power drops below the acceptable operating voltage (approx. 7V), the
LO BAT icon appears on the LCD display. This indicates that the battery needs to be
replaced soon. However, in-spec measurements can still be made for several hours after
the low battery indicator appears. To replace the battery:
1. Open the battery compartment with a screwdriver or small coin.
2. Replace the 9V battery and secure the compartment cover.
Cleaning
Use only a dry cloth to clean the plastic case. Do not use solvents, abrasives, or harsh
detergents.
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.
Copyright © 2005 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
