Extech 380560 MilliOhm Meter Manual PDF
Contents
1. 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 Specifications General Specifications Custom one chip LSI microprocessor circuit Display 0 8 20 mm 2000 Count LED Display Connection type 4 Terminal Kelvin Measurement ranges Seven ranges see listing below Test voltage 5V DC Built in HI LO GO testing with audible beeper Display reads 1___ when the reading is out of range 32 F to 122 F 0 C to 50 C Max 807 RH 110V 380560 or 220V 380562 15 50 60Hz 11 x 8 3 x 3 5 280 x 210 x 90mm Range Specifications TN 45v DC Note Specifications based on RF Field Strength lt 3V m and frequency lt 30MHz International Symbols DC Voltage Refer to explanation in DC Current owners manual AC Voltage Dangerous voltage risk AC Current of electrical shock 2 380560 Version 1 7 01 07 Meter Description 1 LED Display HI LO GO Status Indicators Power and Range pushbuttons i Miliohm Meter Comparator Set Lo Hi Kelvin clip leads SET TEST and HI LO pushbutton2. User s Guide EXTECH INSTRUMENTS High Resolution Benchtop MilliOhm Meter Models 380560 and 380562 Milliohm Meter Comparator Set Hi Introduction Congratulations on your purchase of the Extech 380560 117V or 380562 220V High Resolution MilliOhm Meter This device offers seven resistance ranges with resolution as low as 0 01mQ The 4 wire Kelvin clip connection ensures optimum accuracy The built in comparator feature offers HI LO GO testing Typical applications include transformer motor coil and PC Board resistance measurements Careful use of this meter will provide years of reliable service 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
3. ew to the desired high limit Position the SET TEST pushbutton to TEST ee P o oe pP COUN Set the rear buzzer switch ON or OFF When ON the meter will sound an audible tone for each GO measurement Each time a measurement is taken the appropriate Comparator status LED will light If the measurement is lower than the LO setting the LO LED will light If the measurement is higher than the HI setting the HI LED will light If the reading is between the HI and LO settings the green GO LED will light If the rear beeper pushbutton is set ON an audible tone will sound each time a GO reading is detected Measurement Principles The test current flows through the resistance from the FORCE F terminal to the FORCE F terminal The S and S SENSE terminals measure the voltage drop across the device under test only thus eliminating the lead and contact resistances The meter displays the resistance based on the test current and the measured voltage refer to the equation below Rx Vx Is F Where a Vx is the voltage drop across the device under test Volts lt Current Is is the test current aw Rx is the resistance of the device under test F Calibration and Repair Services Extech offers complete repair and calibration services for all of the products we sell For periodic calibration NIST certification on most products or repair of any Extech product call customer service for details on services availab
4. le Extech recommends that calibration be performed on an annual basis to ensure calibration integrity Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2002 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 4 380560 Version 1 7 01 07
5. s Comparator adjustment screws a eS E Kelvin clip lead input terminals Note The power cable input and audible alert button are on the rear of the instrument Measurement Precautions Ensure that the meter is connected to the correct power source 110V for model 380560 or 220V for model 380562 AN Do not apply voltage to the meter input terminals Meter damage may result Measurement Procedure 1 Connect the Kelvin test leads to the meter 2 Press the POWER pushbutton to turn power on 3 Position the SET TEST pushbutton to the TEST position F F 4 To check the meter zero clip the test leads together as shown at right S4 5 N 5 Select the desired measuring range using White Bands the labeled black pushbuttons When the resistance of the device is unknown start with the highest range and work downward 6 Clip the leads onto the device under test as shown below 7 Observe the reading on the LED display F 4 S S F 3 380560 Version 1 7 01 07 Comparator Operation HI LO GO The meter is equipped with a Comparator function allowing the user to sort resistance measurements against programmable HIGH and LOW limits To program the comparator 1 Position the SET TEST pushbutton to SET Position the LO HI pushbutton to LO Adjust the LO comparator screw to the desired low limit Shown on the LED display Position the LO HI pushbutton to HI Adjust the HI comparator scr
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