MEGOHMMETER E N G L I S H User Manual
Contents
1. 1015 MEGOHMMETER AEMC MODEL 1015 User Manual INSTRUMENTS N Ce CS 2 Statement of Compliance Chauvin Arnoux Inc d b a Instruments certifies that this instrument has been calibrated using standards and instruments traceable to international standards We guarantee that at the time of shipping your instrument has met its published specifications An NIST traceable certificate may be requested at the time of purchase or obtained by returning the instrument to our repair and calibration facility for a nominal charge The recommended calibration interval for this instrument is 12 months and begins on the date of receipt by the customer For recalibration please use our Calibration services Refer to our repair and calibration section at www aemc com Serial Catalog 1403 01 Model 1015 Please fill in the appropriate date as indicated Date Received Date Calibration Due Chauvin Arnoux Inc d b a AEMC Instruments INSTRUMENTS www aemc com Table of Gontents INTR0DUCTI0N 3 1 1 International Electrical 3 1 2 Definition of Measurement Categories 4 1 3 Receiving Your 4 1 4 Ordering2. 4 1 4 1 Accessories and Replacement Parts 4 PRODUCT FEATURES 5 2 1 Description een 5 2 25 NN 5 2 9 Gontrol Features ernennen 6 SPECIFICATI0NS 7 3 1 Electrical Specifications 7 3 2 General Specifications 8 3 3 Safety Specifications 8 OPERATION J J J J J 9 4 1 Safety Check Voltage Test 9 4 2 Insulation Resistance Testing MO Range 9 42 1 Test Voltage ua u einen 9 4 2 2 Spot Testing 10 42 3 Ratio Testing u 10 4 24 Tips For Successful Insulation Resistance Testing 11 4 2 5 Insulation Measurement Connections 11 4 2 6 Insulation Resistance Measurements on Motors 14 4 3 Continuity iint eene ted ge nn 15 MEASUREMENTS ur uu unus e OM e EMT SER 15 44 Resistance Measurement 15 MAINTENAN GI 16 5 1 Maintenances et e e reet ns 16 5 121 Batey Test oe oe eee eine
3. Position Horizontal 5 33 Safety Specifications IEC 1010 1 Safety requirements for electrical equipment for measure ment control and laboratory use VDE 0413 1 Insulation testers D VDE 0413 4 Ohmmeters VDE 0100 Specifications for the creation of high current installations of nominal voltage less than 1000V IEC 801 Electromagnetic compatibility for measurement and control equipment in industrial processes Part 2 Sections relating to electrostatic discharges Part 3 Sections relating to radiated electric fields Part 4 Sections relating to electrostatic discharges Part 5 Sections relating to electric shocks IEC 68 2 6 Vibrations IEC 68 2 27 Shocks IEC 68 2 29 Shakes IEC 68 2 31 Bumps IEC 68 2 32 Free fall UL 94 Self extinguishing capability Specifications are subject to change at any time without notice 8 Megohmmeter Model 1015 CHAPTER 4 OPERATION 41 Safety Check Voltage Test WARNING MAKE SURE THE JACKS ARE FIRMLY INSERTED INTO THE TOP OF THE MEGOHMMETER PRIOR TO PERFORM ING ANY ELECTRICAL TESTS Before measuring insulation resistance confirm that the sample is fully discharged particularly in dielectric and capacitance samples and that the sample is not connected to an energized circuit To perform the voltage test Setthe range selection to MQ 500V or 1000V Connect and read on the voltage scale 600 You do not need to press the yellow button to m
4. at 500V and 1000V The scale is linear with a range from 0 to 100 white background To use the 0 10000 scale take the reading on the 0 to 100 range and multiply the reading by 100 The AC voltage scale is linear with a range of 0 to 600VAc white background Continuity tests are done with a test current of 200mA The colored battery scale has a range of green for a good battery and a range of red or lower for a defective battery A built in battery tester is provided by simply pressing the yellow push button when the selector switch is in the OFF position Voltmeter safety check with a range of 0 to 600VAc is standard and works when the selector switch is in the 500V position or the 1000V position 22 Features Measures insulation at 1000V Oto 10000 resistance range Push button for battery check Designed for harsh environments offshore mining heavy duty field industrial commercial electrical and military use 10Q and 0 to 10Q continuity ranges Continuity 200mA test current Small and lightweight Large direct reading colored scale e 600V test voltage range safety check Yellow non slip shockproof case Megohmmeter Model 1015 5 2 3 N O QO N Control Features mo 500 V Check M2 1000 V 10000 10000 MEGOHMMETER INSTRUMENT MODEL 1015 Figure 2 Line terminal Earth Ground terminal
5. and rewinding or replacing should be considered It is not unusual for a winding to be 10 to 100 times the recommended minimum value IEEE Std 243 1974 Recommended Practice for Testing Insulation Resistance of Rotating Machinery but this varies with tem perature and humidity 4 2 3 Ratio Testing In time resistance reading Dielectric Absorption Ratio readings are taken at 30 and 60 seconds to obtain the dielectric absorption ratio Insulation resistance 60s Dielectric Absorption Ratio DAR Insulation resistance 30s P This test is useful to increase the accuracy of spot testing general ratio of 1 25 2 or better should be required A ratio below this indicates that repair is probably needed Remember a DC insulation test may be used for acceptance testing but is more commonly used to check the gradual deterioration of equipment over its life Consult your equipment manufacturer for specific test or test voltage if not known Insulation resistance decreases with moisture temperature and age and should be recorded over time at a given temperature and corrected 10 Megohmmeter Model 1015 4 2 4 4 2 5 Tips For Successful Insulation Resistance Testing Check with the equipment manufacturer for factory insulation resistance readings Do not rely on insulation resistance testing alone as proof of wind ing conditions Do not expect the same value for all parts of all machines Observe consisten
6. her eR RAE 16 5 1 2 Battery and Fuse Replacement 17 9 1 3 Cleaning oer ete 17 Repair and Calibration 18 Technical and Sales 18 Limited Warranty en eee tine eee e eeu 19 Warranty RepallS ip iier t trei certet itte i fonde 19 CHAPTER 1 INTRODUCTION N WARNING N These safety warnings are provided to ensure the safety of personnel and proper operation of the instrument Read this instruction manual completely and follow all the safety infor mation before attempting to use or service this instrument Safety is the responsibility of the operator Tests are to be carried out only on dead circuits Check for live circuits before making resistance measurements safety check Always make connections from the instrument fo the circuit under test These megohmmeters are sources of high voltage as is the sample connected to them All persons performing or assisting in the tests must follow all safety precautions to prevent electrical shock to themselves and to others AEMC considers the use of rubber gloves to be an excellent safety practice even if the equipment is properly operated and correctly grounded When testing capacitance samples make sure that they have been properly discharged and that they are safe to touch Dielec
7. only specified replacement parts To avoid electrical shock do not attempt to perform any servicing unless you are qualified to do so To avoid electrical shock and or damage to the instrument do not get water or other foreign agents into the case Turn the instrument OFF and disconnect the unit from all the circuits before opening the case 5 1 1 Battery Test Check that the batteries are in good working condition prior to using the instrument With the switch in the OFF position press the yellow button The batteries are good if the needle is in the green zone The batteries need replacement if the needle is the red zone or lower The average battery life is 1000 insulation measurements of 10 seconds the 500V range for R 500 200 insulation measurements of 10 seconds on the MQ 1000V range for R 1MQ 1500 continuity measurements of 1 0 seconds on the 1 00 RED zone below GREEN zone Battery needs to be replaced Battery is good range NOTE The instrument will operate correctly with a battery voltage range of 4 5 to 6 5V 16 Megohmmeter Model 1015 5 1 2 Battery Fuse Replacement WARNING Make sure that no terminals are connected and that the switch is in the OFF position before opening the back of the instrument Remove the yellow shockproof housing Remove the two screws from the back of the instrument Fig 11 Re
8. MODEL 1015 Figure 6 Figure 7 shows the connections for measuring the insulation of a three phase line to ground by connecting the jumpers between phases This gives a reading of all conductors at once If a load such as a motor heater etc is attached to the other end of the line it will read the load resistance to ground at the same time By removing the jumpers readings can be made between the individual conductors and ground 13 4 2 6 Insulation Resistance Measurements on Motors Figure 8 shows reading the resistance to ground of a three phase motor winding Since the three phase motors are internally connected it is only necessary to connect one lead to the motor lead and the other lead to the motor frame as shown Figure 8 Figure 9 shows the wind ings of a three phase motor separated Sometimes this can be done at the lead termi nals while other times the end bells must be removed to get at the lead wires of the coils By connecting the meg ohmmeter as shown the phase insulation resis tance value can now be determined Figure 9 Read between phases A and B then B and C then C and A 14 Megohmmeter Model 1015 Figure 10 shows Motor Side M tions for testing insulation Connection from a supply conductor in a switchbox to ground motor frame An identical test may be carried out from the motor st
9. Mechanical zero adjustment screws 4 position rotary switch Protective rubber housing Push to test button Battery check and indication display Megohmmeter Model 1015 CHAPTER 3 SPECIFICATIONS 31 Electrical Specifications INSULATION TESTS DC Test Voltage 500 V and 1000 V Megohm Range 0 1 to 1000 MO Short Circuit Current lt 6mA Accuracy 5 of reading Discharging Time Auto 1s uF CONTINUITY TESTS Range 0 to 100 O 100 Short Circuit Current gt 200mA Open Circuit Voltage 4 5 to 6 5V Accuracy 3 full scale RESISTANCE TESTS Range 0 to 1000Q Short Circuit Current gt 2mA Open Circuit Voltage 4 5 to 6 5V Accuracy 3 full scale VOLTAGE TESTS Safety Check Voltage Range 0 to 600VAC Frequency 45 to 400Hz Accuracy 3 of full scale Input Impedance 300kQ Megohmmeter Model 1015 32 General Specifications Power Supply Four 1 5V AA batteries Dielectric Test 6000V 50 60 Hz 1 minute Meter Movement Rugged taut band suspension Dimensions 6 6 x 4 2 x 2 2 167 x 106 x 55mm Weight 1 45 Ibs 650g Operating Temperature Range 14 to 131 F 10 to 55 C 20 80 RH Storage Range 40 to 158 F 40 to 70 C 10 90 RH Terminals Line black earth red accepts 4mm banana plugs Reference Conditions 63 to 73 F 17 to 23 C 45 55 RH Supply Voltage 5 3 to 5 7V Voltage Frequency 45 to 65Hz Electric Field lt 1V M Magnetic Field lt 40A M
10. arter 43 Continuity Once it has been verified that no voltage is present the continuity check may be per formed e of Switch to One Leg Starter In Measurements Grounded Motor Frame Set the switch to the 10Q position The measure ment is done automati cally you do not need to press the yellow button Read the value on the white scale 0 to 10Q Set the switch to the 100 position and make sure that the needle of the instrument reads the same value If the second value is different from the preceding one add up the two readings and divide by two The reason for taking two different readings is to comply with the inter national standard VDE 0413 4 If your work does not require you to conform to this standard only one measurement is necessary Return to OFF after use Figure 10 NOTE For better measurement accuracy on the 10Q and the 100 ranges measure the resistance of the leads by short circuit ing them then subtract this value from the measured values 4 4 Resistance Measurements Set the switch to the 10000 position measurement is done auto matically you do not need to press the yellow button Read the value on the white scale 0 to 100 then multiply the reading by 100 to get the actual value measured Return to OFF after use Megohmmeter Model 1015 15 CHAPTER 5 MAINTENANCE 51 Maintenance A WARNING For maintenance use
11. easure voltage NOTE If measuring voltage on a DC circuit the pointer will deflect but the measurement may be inaccurate 42 Insulation Resistance Testing Range After checking for a live circuit see Safety Check above connect the megohmmeter Several connection examples are illustrated in Figures 3 through 10 4 2 1 Test Voltage No published standard tells which voltage to choose for any given winding However published recommendations could be summarized as follows Rated Voltage of Motor Test Voltage Below 115 250V 115 250V or 500V 230 500V 460 500V or 1000V Megohmmeter Model 1015 9 4 2 2 Spot Testing As a general rule in spot testing test voltage should be applied until no variation in reading is noted for 15 seconds or applied for a fixed 60 seconds What minimum value should be measured The IEEE standard No 43 1974 states that it is impossible to specify the value of insulation resistance at which a winding will fail electrically but on motors minimum readings generally stated are Rated Voltage R Minimum 250 or less 2MO 460 2MO There is no fixed figure for determining what is good and bad in resistance readings but a good guide would be 1 megohm for every one hundred applied operating volts as a minimum figure This applies to motors and transformers When the insulation resistance gets this low an electri cal breakdown can be expected at any time
12. ith your records What Instruments will do Ifamalfunction occurs within the one year period you may return the instrument to us for repair provided we have your warranty registration information on file or a proof of purchase AEMC Instruments will at its option repair or replace the faulty material REGISTER ONLINE AT www aemc com Warranty Repairs What you must do to return an Instrument for Warranty Repair First request a Customer Service Authorization Number CSA by phone or by fax from our Service Department see address below then return the instrument along with the signed CSA Form Please write the CSA on the outside of the shipping container Return the instrument postage or shipment pre paid to Ship Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 800 945 2362 Ext 360 603 749 6434 Ext 360 Fax 603 742 2346 603 749 6309 E mail repair aemc com Caution To protect yourself against in transit loss we recommend you insure your returned material NOTE You must obtain a CSA before returning any instrument Megohmmeter Model 1015 19 Notes EJAEMC INSTRUMENTS 02 13 99 MAN 100089 v9 Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 603 749 6434 Fax 603 742 2346 www aemc com
13. move the back cover Replace the fuse or batteries A NOTE There is a spare fuse installed in the back cover Reverse the above procedure to install the back cover and the shock proof housing To close the back stand flush with the back cover apply light pressure at Point A in Fig 11 Cover screws Point 1 5 V batteries LR6 Figure 11 5 1 3 Cleaning Clean the body of the instrument with a cloth lightly moistened with soapy water Wipe clean with a cloth moistened with clean water and dry Do not use solvent Megohmmeter Model 1015 17 Repair and Calibration To ensure that your instrument meets factory specifications we recommend that it be scheduled back to our factory Service Center at one year intervals for recalibration or as required by other standards or internal procedures For instrument repair and calibration You must contact our Service Center for a Customer Service Authorization Number CSA This will ensure that when your instrument arrives it will be tracked and processed promptly Please write the CSA on the outside of the shipping container If the instrument is returned for calibration we need to know if you want a standard calibration or a calibration traceable to N I S T Includes calibration certificate plus recorded calibration data Ship To Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 800 945 2362 Ex
14. such as on primary overcurrent protection devices ripple control units or meters 1 3 Receiving Your Shipment Upon receiving your shipment make sure that the contents are consis tent with the packing list Notify your distributor of any missing items If the equipment appears to be damaged file a claim immediately with the carrier and notify your distributor at once giving a detailed description of any damage Save the damaged packing container to substantiate your claim 1 4 Ordering Information Megohmmeter Model 1015 Cat 1403 01 Includes a carrying case shockproof rubber housing set of black and red leads black test probe red alligator clip spare fuse inside megohmmeter four 1 5V alkaline AA batteries not installed and a user manual 1 41 Accessories Replacement Parts Set of replacement Cat 2119 01 Case u ide olt E kasan aa Cat 2118 40 F ses2set of Cat 2970 22 Order Accessories and Replacement Parts Directly Online Check our Storefront at www aemc com for availability 4 Megohmmeter Model 1015 CHAPTER 2 PRODUCT FEATURES 2 1 Description The Megohmmeter Model 1015 is an analog instrument with four easy to read scales The scale is easy to read log scale graduated from 0 1 to 1000 yellow background
15. t 360 603 749 6434 Ext 360 Fax 603 742 2346 or 603 749 6309 E mail repair aemc com Or contact your authorized distributor Costs for repair standard calibration and calibration traceable to 1 5 are available NOTE You must obtain CSA before returning any instrument Technical and Sales Assistance If you are experiencing any technical problems or require any assistance with the proper operation or application of your instrument please call mail fax or e mail our technical support team Chauvin Arnoux Inc d b a AEMC Instruments 200 Foxborough Boulevard Foxborough MA 02035 USA Phone 800 343 1391 508 698 2115 Fax 508 698 2118 E mail techsupport aemc com www aemc com NOTE Do not ship Instruments to our Foxborough MA address 18 Megohmmeter Model 1015 Limited Warranty The Model 1015 is warranted to the owner for a period of one year from the date of original purchase against defects in manufacture This limited warranty is given by Instruments not by the distributor from whom it was chased This warranty is void if the unit has been tampered with abused or if the defect is related to service not performed by Instruments For full and detailed warranty coverage please read the Warranty Coverage Information which is attached to the Warranty Registration Card if enclosed or is available at www aemc com Please keep the Warranty Coverage Information w
16. t test time duration recognizing that total current through insulation under test will vary with time Correct all readings properly to a standard reference temperature see IEEE Std 43 1974 Temperature Correction Curve Know what you are testing Isolate the piece of equipment from other circuitry Watch trends rather than relying on single spot readings Insulation Measurement Connections Figure 3 shows the connections to measure the insulation of one conduc tor to the other conductors The cable should be disconnected at both ends to avoid leakage through switchboards and panels Conductor Under Test Cable Insulation MEGOHMMETER MODEL 1015 Figure 3 Megohmmeter Model 1015 11 Figures 4 and 5 show the connections for testing insulation from a supply conductor to ground motor frame Conductor Under Test Cable Insulation MEGOHMMETER MODEL 1015 Figure 4 L Under Test Cable Insulation D MEGOHMMETER AEMC MODEL 1015 Figure 5 12 Megohmmeter Model 1015 Figure 6 shows the connections to a transformer lighting or distribu tion Make sure that the switches and or circuit breakers on both sides are open Check the high voltage winding to ground low voltage to ground and the resistance between them with no winding grounded Jumpers Figure 7 Megohmmeter Model 1015 Tested Winding Transformer Grounding Lug oe ARMS
17. tric insula tion samples should be short circuited for at least five times the amount of time they were energized Never open the back of the instrument while connected to any circuit or input 1 1 International Electrical Symbols This symbol signifies that the instrument is protected by double or rein forced insulation This symbol on the instrument indicates a WARNING and that the operator must refer to the user manual for instructions before operating the instrument In this manual the symbol preceding instructions indicates that if the instructions are not followed bodily injury installation sample and product damage may result Risk of electric shock The voltage at the parts marked with this symbol may be dangerous b gt en In conformity with WEEE 2002 06 Megohmmeter Model 1015 3 1 2 Definition of Measurement Categories CAT For measurements on circuits not directly connected to the AC supply wall outlet such as protected secondaries signal level and limited energy circuits CAT Il For measurements performed on circuits directly connected to the electrical distribution system Examples are measurements on household appliances or portable tools CAT For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers CAT IV For measurements performed at the primary electrical supply lt 1000V
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