Related Manuals for AEMC 1000N
Summary of Contents for AEMC 1000N
- Page 1 90HJRKPPHWHU 0RGHO1 (6'&RQGX.WLYLW\7HVW.LW 0RGHO1 USER MANUAL Bat. MEGOHMMETER MODEL 1000N TURN TO LOCK + EARTH GΩ MΩ kΩ Ω - LINE - GUARD...
- Page 2 Instruments, not by the distributor from whom it was pur- chased. This warranty is void if the unit has been tampered with, ® abused or if the defect is related to service not performed by AEMC Instruments. ® Instruments Will Do: If a malfunction occurs within the 2...
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Page 3: Table Of Contents
Table of Contents Warning ................... 4 International Electrical Symbols ............4 Megohmmeter Model 1000N ............5 Receiving Your Shipment ............5 Packaging ................. 5 Accessories and Replacement Parts ........5 Description ................6 Specifications ................7 Control and Connector Identification......... 9 Battery Replacement .............. - Page 4 ESD Conductivity Test Kit Megohmmeter Model 1100N ..27 Receiving Your Shipment ............27 Packaging ................27 Accessories and Replacement Parts ........27 Description ................28 Specifications ................. 29 Battery Replacement ............. 31 AC Supply Module ..............31 Resistance Testing of Conductive Flooring ......32 Measurement Results ............
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Page 5: Warning
(safety check). • The Megohmmeters Models 1000N and 1100N are sources of high voltage, as is the sample connected to them. All persons performing or assisting in the tests must employ all safety precautions to prevent electrical shock to themselves and to others. -
Page 6: Megohmmeter Model 1000N
3D.NDJLQJ The Megohmmeter Model 1000N (Cat. #185.100) is shipped with eight 1.5V “AA” batteries, two color-coded safety leads with insulated alligator clips, a separate shielded lead, a separate insulated alligator clip, test probe, one spare fuse, carrying case and instruction manual. -
Page 7: Description
50, 100, 250, 500 and 1000V. Each test voltage setting has two resistance ranges: 1 to 1000MΩ and 1 to 1000GΩ. In addition, the Model 1000N has a unique low insulation test range of 1 to 1000kΩ with a constant current of 1mA (maximum voltage of ), which is useful for testing old or flooded installations. -
Page 8: Specifications
Megohmmeter Model 1000N/1100N 6SH.LIL.DWLRQV INSULATION TESTS DC Test Voltages: 50, 100, 250, 500, 1000V Megohm Ranges: For each test voltage two direct reading ranges: 1 to 1000MΩ 1 to 1000GΩ Short Circuit Current: 5mA (max) Accuracy: 5% of reading typical 15% of reading between 100 and 1000GΩ... -
Page 9: Specifications
Megohmmeter Model 1000N/1100N VOLTAGE TESTS (SAFETY CHECK) Voltage Range: 0 to 600V Accuracy: 3% of full scale GENERAL SPECIFICATIONS Audible Test Signal: Ten beeps per minute (constant tone for continuity resistance under 200Ω) Power Supply: Eight 1.5V “AA” alkaline batteries (NEDA 15A). Typical battery life: 350 one-minute tests;... -
Page 10: Control And Connector Identification
Megohmmeter Model 1000N/1100N &RQWURO &RQQH.WRU,GHQWLIL.DWLRQ Bat. MEGOHMMETER MODEL 1000N TURN TO LOCK + EARTH GΩ MΩ kΩ Ω - LINE - GUARD 1. Analog Measurement Scale 2. Battery Power Indicator: Green lamp ON indicates batteries are good when PUSH-TO-TEST button is depressed. Audible “beep” is also emitted approximately every 6 seconds. -
Page 11: Battery Replacement
Megohmmeter Model 1000N/1100N %DWWHU\5HSOD.HPHQW The Model 1000N 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. Access panel • Unscrew... -
Page 12: Operation
Megohmmeter Model 1000N/1100N 23(5$7,21 7KH$QDORJ6.DOH Before taking any measurements, verify that the pointer is zeroed correctly (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 13: Preliminary Check
Megohmmeter Model 1000N/1100N 3UHOLPLQDU\&KH.N When the PUSH-TO-TEST button is in the OFF position, the pointer should be on zero of the voltmeter scale, and on three of the GΩ scale. If it is not, use the mechanical zero adjust on the front of the instrument. -
Page 14: Utilizing The Guard Terminal
Megohmmeter Model 1000N/1100N Utilizing the Guard Terminal Guard terminals are useful when measuring high resistance values and for stabilizing readings. When testing the insulation at the end of a cable, it is necessary to eliminate the error from surface leakage which occurs, particularly at high resistance values. -
Page 15: Voltage Measurements (Safety Check)
Megohmmeter Model 1000N/1100N When the guard terminal is connected at “B”, the instrument measures the current “I” and not the surface leakage current “i ”, which is not included in the measurement. See Figure 5. This type of measurement To Guard... -
Page 16: Audible Signal
Megohmmeter Model 1000N/1100N $XGLEOH6LJQDO When the PUSH-TO-TEST button is in the ON or LOCK-IN position, an audible signal will result. This signal consists of approximately one beep every six seconds (ten beeps per minute). The signal can be used as a time base for monitoring the duration of the test. -
Page 17: Insulation Measurement - Connections
Megohmmeter Model 1000N/1100N ,QVXODWLRQ0HDVXUHPHQW&RQQH.WLRQV Figure 7 shows the con- Conductor under test nections to measure the insulation of one conductor to the other conductors. cable should disconnected at both ends to avoid leakage through switchboards and panels. GUARD - LINE... - Page 18 Megohmmeter Model 1000N/1100N Conductor under test GUARD - LINE + EARTH MEGOHMMETER Figure 9 Figure 10 shows the connections to a transformer. 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.
- Page 19 Megohmmeter Model 1000N/1100N Figure 11 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...
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Page 20: Insulation Resistance Measurements On Motors
Megohmmeter Model 1000N/1100N ,QVXODWLRQ5HVLVWDQ.H0HDVXUHPHQWVRQ0RWRUV Figure shows reading 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 21 Megohmmeter Model 1000N/1100N Figure 14 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 22: Understanding Insulation Testing
Megohmmeter Model 1000N/1100N 8QGHUVWDQGLQJ,QVXODWLRQ7HVWLQJ 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 23: Types Of Tests
Megohmmeter Model 1000N/1100N 7\SHVRI7HVWV 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 24: Dielectric Absorption Test
Megohmmeter Model 1000N/1100N Remember that a DC insulation test may be used for acceptance testing, but is more commonly used to check the gradual deterioration of equipment over its lifetime. Consult your equipment manufacturer for specific test or test voltage if not known. -
Page 25: Step Voltage Test
Megohmmeter Model 1000N/1100N 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 26: Effects Of Temperature
Megohmmeter Model 1000N/1100N 7KH(IIH.WVRI7HPSHUDWXUH 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 27 Megohmmeter Model 1000N/1100N ,QWHUSUHWLQJWKH5HVXOWV 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.
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Page 28: Esd Conductivity Test Kit Megohmmeter Model 1100N
3D.NDJLQJ ESD Conductivity Test Kit Megohmmeter Model 1100N (Cat. #2110.03) ® is shipped with the AEMC Model 1000N megohmmeter, two floor weights, 25-foot shielded lead, two safety leads, an alligator clip, test probe, batteries, carrying case and instruction manual. $..HVVRULHV 5HSOD.HPHQWVIRU0RGHO1 1000V Megohmmeter ............Cat. - Page 29 The Model 1100N is useful for testing effectiveness of conductive carpets, mats, tables, chairs, etc. The Model 1000N is especially suited for this type of measurement, due to high accuracy and resolution in the megohm and gigohm ranges.
- Page 30 Megohmmeter Model 1000N/1100N 6SH.LIL.DWLRQV INSULATION TESTS DC Test Voltages: 50, 100, 250, 500, 1000V Megohm Ranges: For each test voltage two direct reading ranges: Ω) 1 to 1000MΩ (10 to 10 Ω) 1 to 1000GΩ (10 to 10 Short Circuit Current: 5mA (max)
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Page 31: Specifications
Megohmmeter Model 1000N/1100N VOLTAGE TESTS (SAFETY CHECK) Voltage Range: 0 to 600V Accuracy: 3% of full scale GENERAL SPECIFICATIONS Audible Test Signal: Ten beeps per minute (constant tone for continuity resistance under 200Ω) Power Supply: Eight 1.5V “AA” alkaline batteries (NEDA 15A). Typical battery life: 350 one-minute tests;... -
Page 32: Ac Supply Module
Megohmmeter Model 1000N/1100N %DWWHU\5HSOD.HPHQW The Model 1100N 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 screws on the four corners of the battery pack and remove the battery pack. - Page 33 Megohmmeter Model 1000N/1100N 5HVLVWDQ.H7HVWLQJRI&RQGX.WLYH)ORRULQJ Background There are numerous standards currently being developed for measuring conductive flooring resistance under 100V and 500V. Actual resistance Ω are values vary from specification to specification, but 10 to 10 typical values. The following simplified procedure is an extrapolation from the ASTM standard F 150-72.
- Page 34 Megohmmeter Model 1000N/1100N 4. Repeat the above procedure with the megohmmeter connected between one weight and a known electrical ground (see Figure 17). In the case of an uninstalled floor sample as in step #1, the ground should be part of the sample panel. In the case of an installed floor sample as in step #2, the ground should be a water pipe or known electrical ground.
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Page 35: Measurement Results
Megohmmeter Model 1000N/1100N Table Top Electrode Groundable Points GUARD - LINE + EARTH MEGOHMMETER Figure 17 0HDVXUHPHQW5HVXOWV Specific measurement results for each individual application of the Model 1100N are difficult to determine. The definitive information on which voltage level to apply, as well as which measurement values will indicate a proper resistivity, should be determined by the manufacturer of the conductive flooring or tiles. -
Page 36: Maintenance
• Do not perform any service while the Megohmmeter Model 1000N/1100N is on any circuit. • To avoid electrical shock and/or damage to the instrument, do not let water or other foreign agents into the electronic module. -
Page 37: Repair And Calibration
Megohmmeter Model 1000N/1100N 5HSDLUDQG&DOLEUDWLRQ To guarantee that your instrument complies with the factory specifications, we recommend that the megohmmeter be submitted to our factory service center at one-year intervals for recalibration, or as required by other standards. For instrument repair and calibration: Call (800) 945-2362 (X360) •... - Page 38 ® ® Chauvin Arnoux , Inc. d.b.a AEMC Instruments 15 Faraday Drive • Dover, NH 03820, USA www.aemc.com 99-MAN 100020 v8 08/18...