Product Manual

382357 V2.2 09/10 2
Warranty
EXTECH INSTRUMENTS CORPORATION (a FLIR company) warrants the basic 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 [phone] EXTENSION 210 for authorization or visit
www.extech.com for more 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.
Introduction
Congratulations on your purchase of Extech’s 382357 Ground Resistance Tester. This
Clamp-on device allows the user to measure ground resistance without the use of
auxiliary ground rods. This device can only be used on multi-grounded systems. It is not
necessary to disconnect the ground under test. This meter is shipped fully tested and
calibrated and, with proper use, will provide years of reliable service.
Safety
 Only qualified technicians should operate this meter.
 Use extreme caution when operating the meter near energized electrical equipment.
 Do not attempt to use this meter to twist or pry the ground electrode or ground wire
away from grounded equipment.
 All metal objects or wires connected to the electrical system under test should be
assumed to be lethal until tested. Grounded systems are no exception.
 Ensure that the batteries are inserted correctly in the battery compartment.
 Remove the batteries from the meter if the meter is to be stored for long periods.
WARNING: If the meter is used in a manner not specified by the manufacturer, the built
in protections provided by the meter may be impaired.
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user
must refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use,
hazardous voltages may be present