Extech 380320 Analog Insulation Tester Manual
Contents
1. Set the FUNCTION switch to the desired test range Connect the test leads to the circuit to be tested CAUTION If the LIVE CIRCUIT indicator lights up at this point DO NOT operate the TEST key Remove the test leads and disconnect all power from the circuit Press and hold the TEST key to make the measurement Turn the key clockwise to lock the test on Read the value on the MQ scale and apply the range multiplier to determine the Megohm resistance reading Release or unlock the TEST key and allow the device to discharge before removing the test leads Range Reading Multiplier 250V 0 5 500V 1 1000V Resistance Measurements WARNING Do not run this test unless the voltage on the device under test is zero If the Live Circuit status LED lights when a test is initiated immediately abort the test and check that the circuit under test is not powered 1 Ol ON 7 Set the Function select switch to the appropriate Resistance 3Q or 500Q position Connect the red test lead to the VQ input and the black lead to the COM input Perform a zero adjustment using the 0 ADJ screw on the unit as described below Connect the test lead tips to the circuit under test Press the TEST key Lock by rotating clockwise if desired Read the resistance on the appropriate green display scale 3Q or 500Q Release or unlock the Test key Zero Adjust f 2 3 4 5 Set the range selector switch to the 3Q or 50002. LED is lit voltage is present on the device under test DO NOT proceed to test with voltage present Shock to the user and damage to the meter or device under test can result if testing is done with voltage present Proceed with testing only when the voltage is removed from the device under test Connecting Test Leads For all measurements connect the red test lead to the VQ input terminal and the black test lead to the COM input terminal Battery Check Set the range selector switch to the BATT CHECK position Press and hold the TEST key Press the Batt Check key Observe the meter pointer If the pointer falls in the BATT GOOD range of the bottom scale batteries are good If the pointer falls outside of to the left of the BATT GOOD area replace the batteries Test Lead Check Set the FUNCTION switch to the 3Q range Touch the test lead tips together and press the TEST key Resistance should read less than 0 50 With the leads not touching the display should read infinity Readings displayed other than the readings described above are indicative of a test lead problem The test leads must be replaced before using the meter Failure to do so could result in damage to equipment and electrical shock PONS ARON 4 380320 V1 0 06 09 Megohm Measurements 1 2 5 Disconnect all power from the circuit to be tested Connect the red test lead to the VQ input terminal and the black test lead to the COM input terminal
3. Road Waltham MA 02451 Copyright 2009 Extech Instruments Corporation a FLIR company All rights reserved including the right of reproduction in whole or in part in any form 8 380320 V1 0 06 09
4. x 2 200 x 92 x 50mm Approx 24 7 oz 700g with batteries 6 380320 V1 0 06 09 Resistance Specifications Range Resolution Accuracy MIN Open Circuit MIN Circuit Current Voltage 30 0 050 a 4 1V SOORA 5000 10 oe 4 1V i AC Voltage Range Res Accuracy Input impedance Overload Protect 600VAC 20V 5 1 2MQ 1000Vrms Megohmmeter Specifications Range Accuracy Terminal voltage 0 2MQ to 5 MQ 5 100MQ 250VDC 250V 10 0 5M to 100 MQ 10 0 5MQ to 10MQ 5 200MQ 500VDC 500V 10 0 10MQ to 200MQ 10 1 MQ to 20 MQ 5 400MQ 1000VDC 1000V 10 0 20 MQ to 400 MQ 10 Range Test Current Load Short circuit Current 100MQ 250VDC 250KQ 200MQ 500VDC 1mA 500KQ Approx 1 3mA 400MQ 1000VDC 1MQ 380320 V1 0 06 09 Warranty EXTECH INSTRUMENTS CORPORATION A FLIR COMPANY 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 to 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 www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for s
5. User s Guide EXTECH INSTRUMENTS A FLIR COMPANY Analog High Voltage Megohmmeter Model 380320 Analog Insulation Tester In 1mA 250VX 500VX 1 9 5 1000vX2 Q 0 0300 400 7 DE Of BITT OR LIVE CIRCUIT Introduction Congratulations on your purchase of the Extech 380320 Analog High Voltage Megohmmeter The 380320 features three Insulation test ranges with a live circuit indicator as well as low resistance and AC voltage measurements The Power Lock On featu re allows hands free operation This professional meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Safety International Safety Symbols A This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information A This symbol adjacent to a terminal indicates that under normal use hazardous Oo voltages may be present Double insulation Safety Notes Do not exceed the maximum allowable input range of any function Set the function switch OFF when the meter is not in use Remove the battery if meter is to be stored for longer than 60 days Circuits under test must be de energized and isolated before connections are made except for voltage measurements Circuit connections must not be touched during a test Use extreme caution when working near bare conductors and bus bars Accidental contact with conductor could r
6. esult in electrical shock After insulation tests capacitors must be discharged Warnings Set function switch to the appropriate position before measuring When changing ranges always disconnect the test leads from the circuit under test Cautions Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter Always remove the test leads before replacing the battery Inspect the condition of the test leads and the meter itself for any damage before operating the meter Repair or replace any damage before use Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts Other means should be used to ensure that the terminals are not live If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 2 380320 V1 0 06 09 Meter Description Analog display See Display Description below 2 Batt Check key Checks battery level with TEST key 1 3 0 ADJ key Adjusts Zero point for Analog display 4 Backlight key Turns on Backlight 2 4 5 TEST LOCK key Enables Battery Check 3 5 Resistance and Megohmmeter functions can be locked by rotating cloc
7. hipping 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 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 Care Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy Seat a Support line 781 890 7440 Technical Support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User Guide Software updates and other up to the minute product information visit our website www extech com Extech Instruments Corporation 285 Bear Hill
8. kwise 6 Function Selector knob Selects desired range and function 6 ExTESH Top View 1 VQ Test Lead Input 2 COM Test Lead Input Display Description 1 Red Megohmmeter Scale Multiply reading by 0 5 for 250V range 1 500V 2 1000V Green Low Resistance Scale 0 to WEIMA OVX 0 3Q Lons 1000vx2 Zz Q Green Resistance Scale 0 to 5000 Blue AC Voltage Measurement Scale 0 to 600V BATT GOOD indicator LIVE CIRCUIT Indicator LED 42 1619 3 380320 V1 0 06 09 Operation CAUTIONS Observe all safety precautions when the FUNCTION switch is set to the 250V 500V or A 1000V positions A Connect the meter test leads to the circuit under test before operating the TEST key A Do not touch the clip ends of the test leads when the TEST key is pressed Some electrical equipment especially cables may retain an electrical charge when disconnected from the line It is good practice to discharge such equipment with A grounding straps or other suitable devices before touching or making connections The meter automatically discharges the test circuits when the spring loaded TEST key is released IMPORTANT NOTE Remove all power to the circuit under test when making resistance measurements If A any voltage is present in the test circuit the red on the meter scale plate will light Immediately disconnect test leads and turn off power to test circuit Live Circuit Indicator LED If the Live Indicator status
9. range Short the test leads together Press the Test key Lock by rotating clockwise if desired Use the 0 ADJ control to align the display pointer with the 0 point on the 30 or 500Q scale Release or unlock the Test key AC Voltage Measurements RON Set the Rotary switch to the OFF VAC position Connect the red test lead to the VQ input and the black lead to the COM input Connect the other end of the test leads to the circuit under test Read the voltage value on the LCD 5 380320 V1 0 06 09 Battery Replacement ON Oo PP ON If the Battery Check indicates low battery power the 6 AA batteries must be replaced Remove the test leads and turn the meter over Unsnap the tilt stand from the rear of the meter Remove the 4 Phillips head screws that secure the battery cover Remove the battery compartment cover Replace the batteries observing correct polarity Replace the battery compartment cover and secure the 4 screws Re attach the tilt stand Specifications General Specifications Display Live Circuit Indicator Power supply Fuse Protection Operating Temperature Operating Humidity Altitude Storage Temperature Storage Humidity Dimensions Weight Multiband analog display with zero adjust LED lights when live circuit is sensed 6 x 1 5V AA batteries 500mA 600V 32 to 104 F 0 to 40 C Below 80 RH Up to 2000 meters 14 to 140 F 10 to 60 C Below 70 RH 7 9 x 3 6
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