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Megohmmeter Models 5000N/5100/5110

- 31 -

Figure 19 shows connections for testing insulation from a supply

conductor in a switchbox to ground (motor frame). An identical test may

be carried out from the motor starter.

Starter in

+ EARTH

- LINE

MEGOHMMETER

GUARD

Grounded

motor frame

Connect to one leg on

the motor side of the switch

Figure 19

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Summary of Contents for 5000N

Page 1: ...5110 USER MANUAL 0 100 200 300 400 500 60 30k 20k 10k 5k 2k 1000 500 200 100 50 20 1 3 5 10 20 50 100 200 500 1000 2k 3k G M k V 5 30 50 100 200 500 1000 2k 5k 10k 20k 30k 5 0 0 V 1000V 2500V 5 0 0 0...

Page 2: ......

Page 3: ...y 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 materia...

Page 4: ...nformation 11 Accessories And Replacement Parts 11 Description 12 Specifications Model 5100 13 Specifications Model 5110 15 Control Connector Identification 17 AC Supply Module 18 Disassembly 19 Using...

Page 5: ...sting 33 Types of Tests 34 Spot Reading Test 34 Polarization Index 35 Step Voltage Test 36 The Effects of Temperature 37 Interpreting the Results 38 Maintenance 39 Warning 39 Cleaning 39 Repair And Ca...

Page 6: ...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 discha...

Page 7: ...ncludes megohmmeter eight 1 5V AA batteries one shielded lead two color coded safety leads insulated alligator clip test probe batteries spare fuse carrying case and user manual Accessories and Replac...

Page 8: ...m voltage of 1300VDC which is useful for testing old or flooded installations A voltmeter safety check with a range of 0 to 600 volts is standard The Model 5000N may be powered by either AC or DC DC p...

Page 9: ...e 0 3 seconds F G range 3 seconds F Discharging Time Automatic discharge when test button is released 0 1 seconds F Scale Two large overlapping scales 4 7 119 mm for each range Test Voltage Generation...

Page 10: ...000VAC 60Hz 1 minute Fuse Protection 0 3A high interrupting capacity fuse between line and guard terminals Meter Movement Rugged taut band suspension Dimensions 7 7 x 5 2 x 3 75 196 x 132 x 95mm Weigh...

Page 11: ...7 8 3 1 PUSH TO TEST button Lock ON by turning button a quarter turn to the right OFF Position Voltmeter position ON Position Test position with voltage present at outputs 2 EARTH terminal green Conne...

Page 12: ...e Model 5000N at 110 or 220VAC The AC power supply module is designed to plug into the back portion of the instrument directly replacing the batteries The module is protected by a 0 1A slow blow fuse...

Page 13: ...eter Model 5100 Cat 1396 07 Megohmmeter Model 5110 Cat 1396 08 Both models include megohmmeter set of three leads hex key 12V NiCad battery 110VAC US line cord and instruction manual Accessories and R...

Page 14: ...ature a digital clock timer that indicates time and date The timer allows accurate testing on time based test applications The timer may be programmed in one of two modes to indicate the elapsed time...

Page 15: ...ical Charging Time 0 5 to 5 seconds F typical Discharging Time Automatic discharge when test button is released 0 1 seconds F Discharge voltage displayed on meter Test Voltage Generation Solid state c...

Page 16: ...Rugged taut band suspension 4 4 x 2 2 112 x 55mm meter with 4 scales Clock Timer Test voltage ON activates timer automatically Dimensions 9 8 x 10 2 x 15 4 250 x 260 x 390mm Weight 14 8 lbs 6 7kg Tem...

Page 17: ...ng Time 0 5 to 5 seconds F typical Discharging Time Automatic discharge when test button is released 0 1 seconds F Discharge voltage displayed on meter Test Voltage Generation Solid state circuitry ge...

Page 18: ...Rugged taut band suspension 4 4 x 2 2 112 x 55mm meter with 4 scales Clock Timer Test voltage ON activates timer automatically Dimensions 9 8 x 10 2 x 15 4 250 x 260 x 390mm Weight 14 8 lbs 6 7kg Tem...

Page 19: ...ST button Lock ON by turning button a quarter turn to the right OFF Position Voltmeter position ON Position Test position with voltage present at outputs 2 EARTH terminal green Connects to ground for...

Page 20: ...ch AC Supply Module Models 5100 and 5110 may be powered by 110V or 220VAC 47 to 450Hz The instrument includes a 110V supply cord which provides power to the instrument as well as charging voltage for...

Page 21: ...pressure to the hinge side of the cover while gripping it firmly To re attach the cover position the cover in a horizontal position and fit the hinges into the respective housing Apply strong rear to...

Page 22: ...m the clock hold the CLOCK TIMER button down continuously for approximately 4 sec The seconds portion of the display will begin to blink Reset to 00 with the RESET button Figure 6 Push and hold or loc...

Page 23: ...test voltage is applied Begin by toggling to the timer portion of the display using the CLOCK TIMER button this mode is indicated by the blinking segment s on the top portion of the display Reset to...

Page 24: ...hat is divided into 10 volt increments The voltmeter function is operable any time the PUSH TO TEST button is out The voltmeter detects the presence of voltage on the equipment to be tested If voltage...

Page 25: ...uminate stop the test and change the batteries before continuing MODELS 5100 and 5110 Note Ensure that the battery low light red is not illuminated at any point during the testing If the light illumin...

Page 26: ...at high resistance values The guard terminal provides a third terminal within the path of the surface leakage Connect the instrument as shown in Figure 7 If there is no shield at B use a copper wire...

Page 27: ...oviding the Ry and Rz are not too low Figure 9 Voltage Measurements Safety Check These instruments can measure AC or DC voltages For voltage measurements proceed as follows The push to test button sho...

Page 28: ...minute The signal can be used as a time base for monitoring the duration of the test On the M and G ranges the signal indicates that the instrument is in operation and that the selected DC test volta...

Page 29: ...ed is properly discharged and grounded before testing When testing individual windings connect all other windings not under test together and ground to motor frame When testing phases be sure they are...

Page 30: ...nal is used to eliminate the effects of surface leakage across exposed insulation at one end of the cable Refer to the section on Utilizing the Guard Terminal pg 24 The cable should be disconnected at...

Page 31: ...tions for measuring the insulation of a three phase line to ground by connecting the jumpers between phases This gives a reading of all con ductors at once If a load such as a motor heater etc is att...

Page 32: ...the other lead to the motor frame as shown Figure 17 Figure 18 shows the windings of a three phase motor separated Sometimes this can be done at the lead terminals while other times the end bells mus...

Page 33: ...for testing insulation from a supply conductor in a switchbox to ground motor frame An identical test may be carried out from the motor starter Starter in EARTH LINE MEGOHMMETER GUARD Grounded motor f...

Page 34: ...ormally be blocked by the insulation resistance Usually the resistance on degrading insulation will drop gradually providing plenty of warning Other times it will drop suddenly as when it is immersed...

Page 35: ...Below 1 1 is dangerous 1 1 to 1 25 is questionable 1 25 to 1 4 is fair and 1 4 to 2 and above is good A ratio below this indicates that repair is probably needed Remember that a DC insulation test may...

Page 36: ...be of the same duration Usually the reading is taken after 60 seconds Interpreting the Results Proper interpretation of spot reading tests requires access to records of results from previous spot read...

Page 37: ...under test A good insulation will show a continual increase in resistance for typically 10 to 15 minutes Contaminated moist or cracked insulation will produce a relatively flat curve A ratio known as...

Page 38: ...sulation which would not have been apparent at lower voltages Test Duration A series of steps each step lasting 60 seconds Interpreting the Results Compare the readings taken at different voltage leve...

Page 39: ...perature typically 68 F 20 C If the temperature of the material you are testing is either higher or lower than 68 F 20 C refer to the temperature correction chart see table As a general rule the insul...

Page 40: ...hic equipment failure Manufacturers Recommendations for Specific Equipment The definitive source for information on a specific piece of equipment is its manufacturer Most manufacturers will provide ba...

Page 41: ...not perform any service while the Megohmmeter is on any circuit To avoid electrical shock and or damage to the instrument do not get water or other foreign agents into the electronic module Cleaning...

Page 42: ...ou want a standard calibration or a calibration traceable to N I S T Includes Calibration Certificate plus recorded calibration data Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH...

Page 43: ...Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA www aemc com 99 MAN 100016 v7 02 18...

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