Analog High Voltage Megohmmeter
Contents
1. Selects desired range and function Top View 1 2 VQ Test Lead Input COM Test Lead Input Display Description th 2 3 4 a Red Megohmmeter Scale Multiply reading by 0 5 for 250V range 1 500V 2 1000V Green Low Resistance Scale 0 to 3Q In 1mA 250V X Green Resistance Scale 0 to 5000 array d 10000 x 2 Blue AC Voltage Measurement Scale 0 to 600V 2 BATT GOOD indicator 3 LIVE CIRCUIT Indicator LED A 5 6 3 380320 en GB_V1 5 9 15 Operation CAUTIONS A Observe all safety precautions when the FUNCTION switch is set to the 250V 500V or 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 grounding A 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 any A 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 st2. EXTECH User s Guide INSTRUMENTS Analog High Voltage Megohmmeter Model 380320 Analog Insulation Tester 1n 1mA 250VX 9 5 1000vX2 amp e UNSS 6X 200300 400 MONK oo 50gf SAN QQ Barr coe 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 feature allows hands free operation This profe ssional meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Safety Intern A o ational 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 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 result in electrical sh
3. atus 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 1 Set the range selector switch to the BATT CHECK position 2 Press and hold the TEST key 3 Press the Batt Check key 4 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 5 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 CPO NS 4 380320 en GB_V1 5 9 15 Megohm Measurements 1 2 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 termina
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5. l 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 DIR ON 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 30 or 5000 Release or unlock the Test key Zero Adjust 1 EON Set the range selector switch to the 3Q or 5000 range Short
6. ock 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 en GB_V1 5 9 15 Meter Description 6 Analog display See Display Description below Batt Check key Checks battery level with TEST key 0 ADJ key Adjusts Zero point for Analog display Backlight key Turns on Backlight TEST LOCK key Enables Battery Check Resistance and Megohmmeter functions can be locked by rotating clockwise Function Selector knob
7. ons General Specifications Display Live Circuit Indicator Power supply Power consumption Fuse Protection Operating Temperature Operating Humidity Altitude Storage Temperature Storage Humidity Dimensions Weight CAT rating Resistance Specifications Multiband analog display with zero adjust LED lights when live circuit is sensed 6 x 1 5V AA batteries 32mA 500mA 600V 0 to 40 C 32 to 104 F Below 80 RH Up to 2000 meters 10 to 60 C 14 to 140 F Below 70 RH 200 x 92 x 50mm 7 9 x 3 6 x 2 Approx 700g 24 7 oz with batteries CATIII 1000V amp CATIV 600V Range Resolution Accuracy MIN Open Circuit Voltage MIN Circuit Current 30 0 050 ay 4 1V SOAR 5000 10 a 4 1V m 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 200M2 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 Copyright 2012 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form IS0 9001 Certif
8. 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 5000 scale Release or unlock the Test key AC Voltage Measurements Pooh 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 meter 5 380320 en GB_V1 5 9 15 Battery Replacement Oo ON Oo e ON gt 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 You as the end user are legally bound Battery ordinance to return all used batteries and accumulators disposal in the household garbage is prohibited You can hand over your used batteries accumulators at collection points in your community or wherever batteries accumulators are sold Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle 6 380320 en GB_V1 5 9 15 Specificati
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