382356

User’s Manual Ground Resistance Clamp On Tester MODEL 382356 WARRANTY EXTECH INSTRUMENTS CORPORATION 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 (781) 890-7440 for authorization. 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 382356 Ground Resistance Tester. This Clamp-on device allows the user to measure the ground resistance of a ground rod 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. Proper use and care of this meter will yield years of reliable service. Safety Safety is the responsibility of the operator. 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. 2 382356 V2.0 5/03 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 Meter Description 1. 2. 3. 4. 5. Jaw Assembly Hold Button Rotary Selector Switch LCD Display Measurement Trigger Display Symbols Ω mA, A •))) NOISE Ohms. milliamps, Amps. Continuity. Annunciator for excessive noise on the ground conductor or rod. Indicates that the clamp jaws are not fully closed. Low Battery. 3 382356 V2.0 5/03 Specifications General Specifications Resistance Test Frequency: Max Conductor size Display Sampling rate Power supply Power consumption Temp. Coefficient 1.667KHz (15mV rms approx.) 0.9” (23mm) 4-digit (9999 count) display 0.4 seconds One 9V battery 40mA 0.15 times the specified accuracy per degree o centigrade (from 39 to 64ºF (4 to 18 C) and 82 to o 122ºF (28 to 50 C)) Protected to 100A Continuous; 200A for less than 60 seconds (50/60Hz) Audible tone if reading is less than approx. 40Ω Automatic ranging Meets the requirements for IEC1010-1 Category III 300V and Category II 600 V 4 to 122 F (-20 to 50 C) with < 85% RH -20 to 140 F (-28 to 60 C) with < 75% RH 10.2 x 4.4 x 1.9” (258 x 110 x 47mm) 24.7oz (700g) Resistance check plate, 9V battery, carrying case o o o o Current Overload Continuity check Range selection Safety Operating conditions Storage conditions Dimensions Weight Accessories Ground Resistance (Autorange) Specifications Range 0.03 to 9.99Ω 10.0 to 99.9 Ω 100.0 to 199.9 Ω 200.0 to 399.9 Ω 400.0 to 599.9 Ω 600.0 to 999.9 Ω 1000 to 1500 Ω Resolution 0.02 Ω 0.1 Ω 0.4 Ω 2Ω 5Ω 10 Ω 30 Ω Accuracy (of reading) ± (1.5% + 0.1 Ω) ± (2.0% + 0.3 Ω) ± (3.0% + 1 Ω) typical ± (5.0% + 5 Ω) typical ± (10% + 10 Ω) typical Not specified Not specified Accuracy Note: Loop resistance non-inductive, external field < 50A/m, external electrical field