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Related Manuals for AEMC 5100
Summary of Contents for AEMC 5100
- Page 1 5000V Megohmmeters Models 5000N/5100/5110 USER MANUAL...
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Page 3: Limited Warranty
Limited Warranty The Megohmmeters Model 5000N, 5100 and 5110 are warranted to the owner for a period of 2 years from the date of original purchase against defects in manufacture. This limited warranty is given by ® AEMC Instruments, not by the distributor from whom it was pur- chased. -
Page 4: Table Of Contents
Specifications - Model 5110 ..........15 Control & Connector Identification ........17 AC Supply Module .............18 Disassembly...............19 Using the Clock/Timer............20 Operation: Models 5000N, 5100 & 5110........22 The Analog Scale...............22 Preliminary Check ..............23 How to use the Push-To-Test Button.........23 Utilizing the Guard Terminal..........24 Voltage Measurements (Safety Check) ......25... - Page 5 Understanding Insulation Testing ........32 Ratio Testing ..............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 Calibration............40 Technical And Sales Assistance...........40 - 3 -...
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Page 6: Warning
Megohmmeter Models 5000N/5100/5110 Warning These safety warnings are provided to ensure the safety of personnel and proper operation of the instrument. WARNING: HIGH VOLTAGE PRESENT • Do not attempt to perform any tests with these instruments until you have read the instruction manual. -
Page 7: Megohmmeter Model 5000N
AC supply module............Cat. #100.438 Fuse, set of one, 0.3A ............Cat. #100.429 Replacement lead, (green and blue clips) ......Cat. #1017.23 7-pin shielded lead, 10 ft for Models 1000N/5000N/5100 ..........Cat. #2950.10 Probe and clip for Model 1000N/5000N....... Cat. #100.404 - 5 -... -
Page 8: Description
Megohmmeter Models 5000N/5100/5110 Description ® AEMC Instruments Model 5000N (Cat. #186.100) is a portable, multi- range, high-sensitivity megohmmeter capable of measuring a wide range of insulation resistances from 10 kilohms to 3000 gigohms (3,000,000 megohms). The Model 5000N has four test voltages of 500, 1000, 2500, and 5000 volts. -
Page 9: Specifications
Megohmmeter Models 5000N/5100/5110 Specifications INSULATION TESTS DC Test Voltages: 500, 1000, 2500, 5000V Megohm Ranges: For each test voltage two direct reading ranges: 30 to 30,000MΩ 3 to 3000GΩ (3000 to 3,000,000MΩ) Short Circuit Current: 3mA (max) Accuracy: 5% of reading typical Charging Time: MΩ... - Page 10 Megohmmeter Models 5000N/5100/5110 GENERAL SPECIFICATIONS Audible Test Signal: Ten beeps per minute Power Supply: Eight 1.5V “AA” alkaline batteries (NEDA 15A). Typical battery life: 350 one-minute tests; power consumed only when test button is depressed; built-in battery check by green LED.
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Page 11: Control & Connector Identification
Megohmmeter Models 5000N/5100/5110 Control & Connector Identification Bat. MEGOHMMETER MODEL 5000N TURN TO LOCK + EARTH GΩ MΩ kΩ - LINE - GUARD 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. -
Page 12: Battery Replacement
Megohmmeter Models 5000N/5100/5110 Battery Replacement The Model 5000N is powered by eight 1.5V “AA” batteries. To replace the batteries, disconnect the instrument from any circuits, verify the PUSH-TO-TEST button is in the OFF position and proceed as follows: • Unscrew the four standard... -
Page 13: Megohmmeter Model 5100/5110
Ordering Information Megohmmeter Model 5100 ..........Cat. #1396.07 Megohmmeter Model 5110 ..........Cat. #1396.08 Both models include megohmmeter, set of three leads, hex key, 12V NiCad battery, 110V US line cord and instruction manual. -
Page 14: Description
Each test voltage setting has two overlapping resistance ranges of 3MΩ to 3000MΩ and 3GΩ to 3000GΩ (3,000,000MΩ). The Models 5100 and 5110 have a unique low insulation test range of 10 to 30,000kΩ with a constant current of 33µA (maximum voltage of ), which is useful for testing old or flooded installations. -
Page 15: Specifications - Model 5100
Megohmmeter Models 5000N/5100/5110 Specifications - Model 5100 INSULATION TESTS DC Test Voltages: 500, 1000, 2500, 5000V Megohm Ranges: For each test voltage two direct reading ranges: 30 to 30,000MΩ 3 to 3000GΩ (3000 to 3,000,000MΩ) Short Circuit Current: 6mA (max) - Page 16 Megohmmeter Models 5000N/5100/5110 GENERAL SPECIFICATIONS Audible Test Signal: Ten beeps per minute approx. (signal may be disabled) Power Supply: Rechargeable 12V NiCad battery Typical life: 500 to 2500 1 min tests (depending on test voltage) Recharging time: 14 hrs (max) for full charge Fuse protection: 3.15A fast blow...
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Page 17: Specifications - Model 5110
Megohmmeter Models 5000N/5100/5110 Specifications - Model 5110 INSULATION TESTS DC Test Voltages: 500, 1000, 2500, 5000V Megohm Ranges: For each test voltage two direct reading ranges: 3 to 3000MΩ 3 to 3000GΩ Short Circuit Current: 6mA (max) Accuracy: 5% of reading typical Charging Time: 0.5 to 5 seconds/µF typical... - Page 18 Megohmmeter Models 5000N/5100/5110 GENERAL SPECIFICATIONS Audible Test Signal: Ten beeps per minute approx. (signal may be disabled) Power Supply: Rechargeable 12V NiCad battery Typical life: 500 to 2500 1 min tests (depending on test voltage) Recharging time: 14 hrs (max) for full charge Fuse protection: 3.15A fast blow...
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Page 19: Control & Connector Identification
Megohmmeter Models 5000N/5100/5110 Control & Connector Identification 50/60/400Hz AEMC MEGOHMMETER MODEL 5100 CHARGING I N S T R U M E N T S 110V Ñ LINE – + GUARD + EARTH 660V max. Ω CLOCK / TIMER RESET PUSH AND TURN TO LOCK "ON"... -
Page 20: Ac Supply Module
14. LCD Display: Clock or timer. 15. Selection Switch AC Supply Module Models 5100 and 5110 may be powered by 110V or 220V (47 to 450Hz). The instrument includes a 110V supply cord, which provides power to the instrument as well as charging voltage for the rechargeable battery. -
Page 21: Disassembly
Unhinging the cover to be removed. To Force detach cover from Models 5100 or 5110, open lid to a horizontal position and apply Force downward pressure to the hinge side of the cover while gripping it firmly. To re-attach the cover, position... -
Page 22: Using The Clock/Timer
Megohmmeter Models 5000N/5100/5110 Using the Clock/Timer The clock/timer function may be used in three ways. First, a clock and calendar indicate the current time (12-hour format). Second, a timer may be used when performing insulation resistance tests that are dependent upon an accurate time reading (e.g. - Page 23 Megohmmeter Models 5000N/5100/5110 Using the Timer The timer portion may be used in two different ways: First, Voltage Timer indicates time elapsed since the application of the selected test voltage. The timer begins the count (to a hundredth of second) when the PUSH-TO-TEST button is pressed. Releasing the PUSH-TO-TEST button suspends the timer operation.
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Page 24: Operation: Models 5000N, 5100 & 5110
Megohmmeter Models 5000N/5100/5110 OPERATION: MODELS 5000N, 5100 & 5110 The Analog Scale Before taking any measurements, verify that the pointer is zeroed correctly (red AC scale "0"). If it is not, adjust with the mechanical zero adjust screw. The analog scale serves two functions: First, it indicates the actual resistance of the insulating material under test (black scales). -
Page 25: Preliminary Check
The green neon “Bat.” lamp should light up (Model 5000N) or the red neon light will blink (Models 5100 and 5110). MODEL 5000N: Note: Ensure that the “Bat.” light (green) does not go out at any point during the testing. -
Page 26: Utilizing The Guard Terminal
Megohmmeter Models 5000N/5100/5110 Utilizing the Guard Terminal Guard terminals are useful when measuring high resistance values and for stabilizing readings. Outer jacket The guard terminal is useful when Exposed measuring very Surface high resistance Conductor Insulation Shield values. Line (-) -
Page 27: Voltage Measurements (Safety Check)
Megohmmeter Models 5000N/5100/5110 When the guard terminal is To Guard connected “B”, Terminal instrument measures the current “I” and not the surface leakage current “i ”, which is not included in measurement. Figure 9. This type of measurement will give the true value of the resistance “Rx”, providing the “Ry”... -
Page 28: Audible Signal
DC test voltage may be present on the terminals of the instrument. Note: On the Models 5100 and 5110, the audible signal may be disconnected by means of a jumper located on the main circuit board. Connector to... -
Page 29: Precautions When Making Dc Insulation Tests
Megohmmeter Models 5000N/5100/5110 Precautions When Making DC Insulation Tests • The equipment should be taken off the line sufficiently in advance to permit it to cool to ambient temperature. • When you are testing windings, they should be clean and dry; let solvents and cleaners evaporate. - Page 30 Megohmmeter Models 5000N/5100/5110 Figures 13 and 14 show the connection for testing insulation from a supply conductor to a ground (motor frame). The connection to the guard terminal 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).
- Page 31 Megohmmeter Models 5000N/5100/5110 Figure shows connections to a transformer. Make sure that the switches and/or circuit breakers on Winding under test both sides are open. Check the high voltage winding to ground, voltage ground, and the resistance between them with winding grounded.
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Page 32: Insulation Resistance Measurements On Motors
Megohmmeter Models 5000N/5100/5110 Insulation Resistance Measurements on Motors Figure 17 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. - Page 33 Megohmmeter Models 5000N/5100/5110 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. Connect to one leg on the motor side of the switch...
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Page 34: Understanding Insulation Testing
Megohmmeter Models 5000N/5100/5110 UNDERSTANDING INSULATION TESTING Insulation is the material between two points of different potential which, through high resistivity, prevents the flow of current between those points. Insulation failure is one of the most common problems associated with electrical equipment breakdown. -
Page 35: Ratio Testing
Megohmmeter Models 5000N/5100/5110 RATIO TESTING In time resistance reading (dielectric absorption ratio), readings are taken at 30 seconds and 60 seconds to obtain the dielectric absorption ratio. Insulation resistance @ 60s = Dielectric Absorption Ratio (DAR) Insulation resistance @ 30s This test is useful for increasing the accuracy of spot testing. -
Page 36: Types Of Tests
Megohmmeter Models 5000N/5100/5110 TYPES OF TESTS Spot Reading Test Method For this test, the megohmmeter is connected across the insulation of the windings of the machine being tested. A test voltage is applied for a fixed period of time, usually 60 seconds, and a reading is taken. The spot... -
Page 37: Polarization Index
Megohmmeter Models 5000N/5100/5110 Polarization Index Method This test is based on the comparison of absorption characteristics of good insulation vs. the absorption characteristics of humid or otherwise contaminated insulation. During the test, a test voltage is applied for an extended period, usually 10 minutes. The operator takes a reading every 10 seconds for the first minute, and then every minute up to 10 minutes. -
Page 38: Step Voltage Test
Megohmmeter Models 5000N/5100/5110 Step Voltage Test Method In this test, the operator applies two or more test voltages in steps. The recommended ratio for the test voltage steps is 1 to 5. At each step, test voltage should be applied for the same length of time, usually 60 seconds. -
Page 39: The Effects Of Temperature
Megohmmeter Models 5000N/5100/5110 THE EFFECTS OF TEMPERATURE Insulation resistance measurements are changed by variations in temperature of the insulation material. Typically, when the temperature goes up, the insulation resistance will go down. Inversely, when the temperature drops the insulation resistance will increase in value. -
Page 40: Interpreting The Results
Megohmmeter Models 5000N/5100/5110 INTERPRETING THE RESULTS Insulation resistance values are a function of the type of insulating material. The actual value you read may vary greatly and is not as important as the trends of the values over time. This is why the resistance measurement must be taken in a greater context. -
Page 41: Maintenance
Megohmmeter Models 5000N/5100/5110 MAINTENANCE Warning: • For maintenance use only original factory replacement parts. • To avoid electrical shock, do not attempt to perform any servicing unless you are qualified to do so. • Do not perform any service while the Megohmmeter is on any circuit. -
Page 42: Repair And Calibration
Megohmmeter Models 5000N/5100/5110 Repair and Calibration To ensure that your instrument meets factory specifications, we recommend that it be submitted 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#). - 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...