User`s Manual 10KV Digital High Voltage Insulation Tester
Contents
1. TEST button This message indicates that the insulation under test has broken down and the meter is trying to inject a high potential onto a short circuit If HIGH appears it is likely that the test configuration is open Check the test set up then test again Elapsed Timer The test duration is indicated on the display This is particularly useful in determining whether an insulating material under test will break down in a given amount of time 5 380385 V1 5 3 04 Manual Test STOP To stop a test in progress press the TEST button The test will immediately end and the system will automatically discharge Automatic Test STOP When in the default Enersave mode the test automatically stops after approx 10 seconds The test automatically stops after approx 100 seconds if the meter is not in the Enersave mode Live Circuit Warning If the test leads are connected to a live circuit approx 500V a warning beeper will sound and the meter will display Live Warning Circuit Live In this case correct the problem and retest Automatic Discharge At the end of a test the meter automatically discharges the high voltage The automatic discharge status is reflected on the display During discharge the beeper will sound and when completely discharged the HOLD icon appears on the display Applications Measuring Power Tools and Small Appliances For small appliances connect the Black EARTH lead to conducto2. KVDC such devices include power factor correction capacitors low voltage mineral insulated cables electronic light dimmers ballasts and starters for fluorescent lamps Connecting the Test Leads to the meter The Black Earth Red Line and Green Guard test leads connect to the meter directly above the dot matrix display the meter jacks are color coded NOTE The Green Guard lead is attached to the Red lead and should be used refer to applications section next Connecting the Test Leads to the device under test The Black Earth lead is connected to the conductive material The Red Line and Green Guard leads are connected to insulating sheathing and covering material as shown in the following applications section 4 380385 V1 5 3 04 Operation Powering the meter Press the ON button to turn the unit on Press the OFF button to turn the unit off Insulation Resistance Measurements Warning The circuit under test must be completely de energized and isolated before making test connections 1 After turning the unit on the display will prompt the user Select Voltage to select a test voltage diagram at right 250000MQ V 5000V 2 Select the test voltage by pressing one of the preset voltage buttons 1KV 2 5KV 5KV 10KV or by pressing the Voltage Adjust buttons 500 500 to step through the available test voltages in 500V steps 3 The resistance range for the selected voltage is indicated on the dot mat
3. User s Manual EXTECH INSTRUMENTS 10KV Digital High Voltage Insulation Tester Model 380385 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 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
4. lt gt 4 High voltage winding to ground 5 Low voltage winding to ground J eeo i 7 380385 V1 5 3 04 Maintenance Battery Replacement When REPLACE BATTERY appears on the display replace the eight 1 5V C batteries Ensure that the meter is powered down and that the test leads are not connected Close the instrument cover and turn the instrument upside down Remove the screw located on the bottom of the meter Remove the battery compartment cover CP ON os Replace the eight batteries ensuring proper polarity 6 Affix the rear cover and secure the rear screw Cleaning Periodically wipe the case with a dry cloth Do not use solvents or abrasives to clean this instrument Repair and Calibration Extech offers complete repair and calibration services for all of the products we sell For periodic calibration NIST certification or repair of any Extech product call customer service for details on services available Extech recommends that calibration be performed on an annual basis to insure calibration integrity T 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 8 380385 V1 5 3 04
5. mp manual stop or upon completion of test Low battery indicator Replace battery displayed when battery voltage is low Power source Eight 1 5V C cells Battery life 40 hrs no load at 10kV Auto Power off After 5 minutes of inactivity Enersave mode Shorter test time to conserve battery life Test Leads Supplied RED length 108 with GREEN guard lead BLACK lead is 42 Operating conditions 32 to 104 F 0 to 40 C lt 80 RH Storage conditions 14 to 140 F 10 to 60 C lt 80 RH Dimensions 13 x 10 2 x 6 3 330 x 260 x 160mm Weight 7 9 Ibs 3 6kg Range Specifications DC Test Resistance Short Circuit Accuracy Resolution Voltages Ranges in GQ Current 0 5KV 25 1KV 50 100mA 1 5KV 75 2KV 100 2 5KV 125 3KV 150 3 5KV 175 120mA 4KV 200 4 5KV 225 5KV 250 3 2d 1MQ 5 5KV 275 6KV 300 6 5KV 325 7KV 350 7 5V 375 170mA 8KV 400 8 5KV 425 9KV 450 9 5KV 475 10KV 500 360mA Note Voltage Regulation is 20 5 unless current limited 3 380385 V1 5 3 04 Meter Description 1 Test lead jacks 2 Dot Matrix Display 3 Keypad 4 Battery compartment on bottom 5 Test lead compartment latch 6 Preparation Warning Ensure that the circuit under test does not include devices or components that can be damaged by 10
6. nce measurement indicates a weakness raise the brushes off of the commutator and separately test the armature field coils and brush rigging by connecting one lead to each individually leaving the other connected to the grounded motor housing This also applies to DC Generators Testing Single Conductor Cables Core Insulation Sheath Covering 1 Completely disconnect the cable under test from its source and destination 2 Connect the test leads to the cable as shown at right EARTH GUARD LINE Testing Multi Conductor Cables 1 Completely disconnect the cable under test from its source and destination Refer to the diagrams below for three possible tests GUARD 2 EARTH EARTH LINE 1 LINE GUARD EARTH LINE Testing one conductor to Testing one conductor One conductor to all all of the conductors to earth minus ground Transformer Testing Transformer tests are performed with the transformer completely disconnected from the line and the load Note that the case ground should not be removed The five tests listed below will completely test a single phase transformer Note that at least 1 minute should be allowed oo fo 4 between each test f lt gt f 1 High voltage winding to low voltage Connectthe gt Comestthe winding and grouno gt BLACK lead here RED lead here 2 Low voltage winding to high voltage winding and ground 3 High voltage winding to low voltage winding pictured at right
7. rix display as shown above Press the TEST START STOP button again The display will prompt the user to connect the leads Connect Leads Press the TEST START STOP button to start testing Press TEST 6 The elapsed test time appears on the upper line right hand side of the display The resistance reading is shown on the upper left hand side of the display The lower line shows the test voltage in bargraph format see diagram at right R 9 998MQ 6 8s 7 The HOLD icon will appear in place of the bargraph o gt BBE lt 500v when the test is complete and the voltage has been discharged WARNING DO NOT REMOVE THE TEST LEADS BEFORE THE HOLD DISPLAY APPEARS 8 The meter automatically discharges the system at the end of the test 9 The meter automatically powers down after 5 minutes The Enersave Mode Enersave mode conserves battery life by performing a relatively short test 10 seconds The Enersave mode is the default test mode To bypass this mode and run a longer test 100 seconds max press and hold the TEST button for 3 seconds when starting a test Bargraph Voltage Display The bargraph represents the voltage present on the test leads as it rises soaks and decays The bargraph appears on the lower left of the dot matrix display during a test Automatic Under Over Range Resistance Detect If the display shows the message LOW MQ the test should be interrupted immediately by pressing the
8. rs and the Red LINE lead to insulating material For single or double insulated power tools one lead should be connected to the device s chuck blade etc and the other lead to one of the AC power cord conductors test both conductors in turn Refer to the power tool application diagram below e SI For 2 or 3 prong plugs connect the _l4 RED lead to one conductor at a time l Connect the BLACK lead to the chuck Testing Motors AC Motors Disconnect the motor from the line by a Disconnecting the wires from the motor terminals or b Opening the main switch If the main switch is opened and the motor also has a motor starter then the starter must be held in the ON position With the main switch opened the measured resistance will include the resistance of the motor wire and all other components between the motor and the main switch If a weakness is indicated the motor and other components should be checked individually If the motor is disconnected at the motor terminals connect the RED lead to the grounded motor housing and the BLACK lead to one of the motor leads lt lt Connect BLACK lead to the motor leads Connect RED lead to grounded housing 6 380385 V1 5 3 04 DC Motors 1 Disconnect the motor from the line 2 To test the brush rigging field coils and armature connect the RED lead to the grounded motor housing and the BLACK lead to the brush on the commutator 3 Ifthe resista
9. your purchase of the Extech High Voltage Insulation Tester This device has four pre set voltage test ranges up to 10kV and measures insulation resistance to 500GQ Other voltage test values can be selected using the 500V step buttons This professional meter with proper care will provide years of safe reliable service Safety 1 Circuits under test must be de energized and isolated before connections are made 2 Circuit connections must not be touched during a test 3 After insulation tests capacitors must be discharged 4 Test leads including alligator clips must be in good working order clean and without broken or cracked insulation a When servicing use only specified replacement parts 6 Environmental conditions e Indoor use only Installation category III 300V Pollution degree 2 e Altitude up to 2000 meters e Relative Humidity 80 max Temperature 0 to 40 C International Safety Symbols Caution refer to this manual before using this meter Dangerous Voltages risk of electric shock Meter is protected throughout by double or reinforced insulation 2 380385 V1 5 3 04 Specifications General specifications Display 2 x 20 character alphanumeric multi function dot matrix Range selection 20 ranges in 500V steps with automatic ranging Preset buttons for 1KV 2 5KV 5KV and 10KV Bargraph Displays voltage ramp soak and decay Automatic discharge After automatic a
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