Model 380360 Version 1.7 September 2003
8
Support Hotline (781) 890-7440
Tech support: Ext. 200; Email: [email protected]
Repair/Returns: Ext. 210; Email: [email protected]
Website: www.extech.com
Application Note for Large Installations
In large wiring installations where the insulation of outlets is being tested, more than one
insulation resistance measurement may have to be made to take into account parallel
resistances. Divide large systems into subgroups and test subgroups individually. Also, in
large installations, the capacitance of the insulation will be high, thereby taking longer to
charge when being tested. Care must be taken not to finish a measurement until the
insulation capacitance is fully charged (a steady, stable reading is an indication that this is
the case). Be careful not to turn the range switch while the test button is pressed.
Repair and Calibration
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.
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 on 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 at www.extech.com (click on ‘Contact Extech’ and go to ‘Service
Department’ to request an RA number). 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 © 2003 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.
