AEMC 5100 User manual

5000V Megohmmeters
Models 5000N/5100/5110
USER MANUAL
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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. 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.
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 with your records.
What AEMC®Instruments will do:
If a malfunction occurs within the warranty 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 number
on the outside of the shipping container. Return the instrument, postage or
shipment pre-paid to:
Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments
Service Department
15 Faraday Drive • Dover, NH 03820 USA
Tel: [phone] (Ext. 360)
[phone] (Ext. 360)
Fax: [phone] or [phone]
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.

- 2 -
Table of Contents
Warning ......................................................................................4
International Electrical Symbols .................................................4
Megohmmeter Model 5000N....................................................5
Receiving Your Shipment.....................................................5
Ordering Information ............................................................5
Accessories And Replacement Parts...................................5
Description ...........................................................................6
Specifications .......................................................................7
Control & Connector Identification .......................................9
Battery Replacement..........................................................10
AC Supply Module .............................................................10
Megohmmeter Model 5100/5110............................................11
Receiving Your Shipment...................................................11
Ordering Information ..........................................................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 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
Audible Signal ....................................................................26
Precautions when making DC Insulation Tests .................27
Insulation Measurement - Connections .............................27
Insulation Resistance Measurements on Motors...............30

- 3 -
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

Megohmmeter Models 5000N/5100/5110
- 4 -
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.
•Safety is the responsibility of the operator!
•Tests are to be carried out only on non-energized circuits!
Check for live circuits before making resistance measure-
ments (safety check).
•These Megohmmeters 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.
•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.
Dielectric insulation samples should be short-circuited for at
least five times the amount of time they were energized.
•Megohmmeters should never be used in an explosive
environment.
•Use the leads supplied with the megohmmeters. If they are
defective or worn, replace before testing.
International Electrical Symbols
This symbol signifies that the instrument is protected by double
or reinforced insulation. Use only specified replacement parts
when servicing the instrument.
This symbol signifies CAUTION! and requests that the user refer
to the user manual before using the instrument.
Risk of electric shock. The voltage at the parts marked with this
symbol may be dangerous.

Megohmmeter Models 5000N/5100/5110
- 5 -
MEGOHMMETER MODEL 5000N
Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are
consistent 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.
Ordering Information
Megohmmeter Model 5000N................................................ Cat. #186.100
Includes 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 Replacement Parts
AC power supply module with line cord and plug
for switch-selectable 110/220VAC at 47 to 400Hz................ Cat. #100.142
Protective rubber case with handle, safety yellow ............... Cat. #2980.02
Fuse, set of five, 0.1A slow blow
for 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

Megohmmeter Models 5000N/5100/5110
- 6 -
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. Each test voltage setting has two overlapping resistance
ranges of 30MΩ to 30,000MΩ and 3GΩ to 3000GΩ on a long (9.4") dial.
In addition, the Model 5000N has a unique low insulation test range of 10
to 30,000kΩ with a constant current of 33µA (maximum 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 power is
supplied by eight 1.5V alkaline “AA” batteries. As an option, an AC line
supply module and cord for 110/220VAC at 47 to 400Hz can be inserted
in the battery compartment.
An audible signal, consisting of approximately ten beeps per minute, is
present when the megohmmeter is ON, and serves as a time base for
tests of long duration. A green LED, when ON, indicates that the
batteries are good when the push-to-test button is depressed. It also
serves as a warning light when the instrument is in use, indicating that
the selected test voltage is present at the terminals.

Megohmmeter Models 5000N/5100/5110
- 7 -
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 range: 0.3 seconds/µF
GΩ range: 3 seconds/µF
Discharging Time:
Automatic discharge when test button is released; 0.1 seconds/µF
Scale:
Two large overlapping scales: 4.7" (119 mm) for each range
Test Voltage Generation:
Solid state circuitry generating rated test voltage across the full range
RESISTANCE TESTS
Test Current: Constant 33 µA DC
Kilohm Range: 10 to 30,000kΩ (30MΩ)
Maximum Test Voltage: 1300VDC
Accuracy: 5% of reading typical
VOLTAGE TESTS (SAFETY CHECK)
Voltage Range: 0 to 600VAC/DC
Accuracy: 3% of full scale

Megohmmeter Models 5000N/5100/5110
- 8 -
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.
Option:
110/220V selectable
47 to 400Hz AC supply module
Dielectric Test: 4000VAC, 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)
Weight: 2.2 lbs (1 kg)
Temperature Range: 23° to 122°F (-5° to +50°C)
Case: High impact gray polycarbonate
Terminals:
Color-coded safety terminals; guard terminal eliminates surface
leakage errors
Electromagnetic Compatibility:
CEI 801-2: Electrical Discharge
Class II
CEI 801-3: Magnetic Fields 3 V/m
CEI 801-4: Rapid Transients Class II
CEI 801-5: Electrical Shock (5KV 2 Joules)

Megohmmeter Models 5000N/5100/5110
- 9 -
Control & Connector Identification
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- GUARD- LINE
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TURN TO
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ON
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MEGOHMMETER
MODEL 5000N
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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)
Connects to ground for insulation testing.
3. LINE terminal (black)
Connects to the equipment to be tested.
4. Analog Measurement Scale
5. Battery Power Indicator
Green light ON indicates that the batteries are good when the
PUSH-TO-TEST button is depressed. Audible “beep” is also
emitted approx every 6 seconds.
6. Mechanical Zero Adjust
7. Selection Switch
8. GUARD terminal (blue)
Used to minimize the effect of leakage current.

Megohmmeter Models 5000N/5100/5110
- 10 -
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
screws on the four corners of
the battery pack and remove
the battery pack.
• Replace the batteries,
observing the proper
polarities.
• Replace the battery case,
taking care not to pinch the
connecting wire, and tighten
the four screws.
Figure 2
AC Supply Module
The optional AC supply module (Cat. #100.142) provides power to the
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.
Note: Cat. #100.142 is supplied with 110V US plug.
• Unscrew the four screws on the corners of the back panel battery
pack.
• Disconnect and remove the battery pack.
• Connect the AC supply module to the power supply connector.
• Place the AC supply module into the back of the instrument and
tighten the four corner screws, making sure not to pinch the wires of
the power supply connector.
• With the tip of a screwdriver, select the proper voltage with the
110/220 supply switch on the back panel of the AC supply module
• Plug the AC supply cord into the appropriate voltage receptacle.
Access panel
Access panel screws

Megohmmeter Models 5000N/5100/5110
- 11 -
MEGOHMMETER MODEL 5100/5110
Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are
consistent 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.
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, 110VAC US line cord and instruction manual.
Accessories and Replacement Parts
7-pin shielded lead, 10 ft,
for Models 1000N/5000N/5100 ............................................ Cat. #2950.10
Color-coded safety leads, set of two, 10-ft........................... Cat. #2950.09
7-pin Shielded lead, 25 ft,
for Models 1100N/5000N/5100 ............................................ Cat. #2118.26
Safety leads, set of two 25 ft with alligator clips................... Cat. #2118.27
Fuse, set of five, 3.15 A .......................................................Cat. #1007.26
Rechargeable 12V NiCad battery ........................................ Cat. #2960.10
Safety leads,
set of two 10 ft with heavy duty alligator clips ...................... Cat. #2950.23

Megohmmeter Models 5000N/5100/5110
- 12 -
Description
AEMC® Models 5100/5110 are portable, multi-range, high-sensitivity
megohmmeters capable of measuring a wide range of insulation
resistances from 10 kilohms to 3000 gigohms. The Model 5100 has four
test voltages of 500, 1000, 2500, and 5000 volts. Each test voltage
setting has two overlapping resistance ranges of 30MΩ to 30,000MΩ and
3GΩ to 3000GΩ (3,000,000MΩ). The Model 5110 features a color
display and also has test voltages of 500, 1000, 2500, and 5000 volts.
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
1300VDC), which is useful for testing old or flooded installations. A
voltmeter (safety check) with a range of 0 to 600 volts is standard.
Both models feature 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 of applied test voltage, or the time elapsed since the test voltage
has been stopped (discharge time).
An audible signal consisting of approximately ten beeps per minute is
present when the test voltage has been applied, and also serves as a
time base for tests of long duration.
The Models 5100/5110 may be powered by either AC or DC. DC power
is supplied by a 12V rechargeable nickel-cadmium battery. AC supply
voltage may be either 110V or 220V via the removable line cord, which
plugs directly into the front of the instrument. Neon lamps on the front
panel indicate battery status; a green light indicates battery charge/AC
supply, while a red light indicates the battery charge status.
The rugged field case in safety yellow is weatherproof and rainproof
when closed. The instrument cover is also removable. The Models
5100/5110 are specifically designed for field, utility, and industrial use.

Megohmmeter Models 5000N/5100/5110
- 13 -
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)
Accuracy: 5% of reading typical
Charging Time:
0.5 to 5 seconds/µF typical
Discharging Time:
Automatic discharge when test button is released; 0.1 seconds/µF.
Discharge voltage displayed on meter.
Test Voltage Generation:
Solid state circuitry generating rated test voltage across the full range
RESISTANCE TESTS
Test Current: Constant 33 µA DC
Kilohm Range: 10 to 30,000kΩ (30MΩ)
Maximum Test Voltage: 1300VDC
Accuracy: 5% of reading typical
VOLTAGE TESTS (SAFETY CHECK)
Voltage Range: 0 to 600VAC/DC
Accuracy: 3% of full scale

Megohmmeter Models 5000N/5100/5110
- 14 -
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
Low battery indicators
AC Supply: 110/220V, 47 to 450Hz AC ± 20%
Dielectric Test: 4000VAC, 60Hz, 1 minute
Overload: 600Vrms between one terminal and the other two
Meter Movement/Display:
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)
Temperature Range: 14° to 131°F (-10 to 55°C)
Field Case:
High impact, fiberglass charged polycarbonate (fire resistant UL94);
sealed and weatherproofed; rainproof when closed
Terminals:
Color-coded safety terminals; guard terminal minimizes surface
leakage errors
Safety Standards:
4000V dielectric test
Double insulation
IEC 348
Electromagnetic Compatibility:
CEI 801-2: Electrical Discharge. Class II
CEI 801-3: Magnetic Fields 3V/m
CEI 801-4: Rapid Transients class II
CEI 801-5: Electrical shock (5KV 2 Joules)

Megohmmeter Models 5000N/5100/5110
- 15 -
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
Discharging Time:
Automatic discharge when test button is released; 0.1 seconds/µF.
Discharge voltage displayed on meter.
Test Voltage Generation:
Solid state circuitry generating rated test voltage across the full range
RESISTANCE TESTS
Test Current: Constant 33 µA DC
Kilohm Range: 10 to 30,000kΩ (30MΩ)
Maximum Test Voltage: 1300VDC
Accuracy: 5% of reading typical
VOLTAGE TESTS (SAFETY CHECK)
Voltage Range: 0 to 600VAC/DC
Accuracy: 3% of full scale

Megohmmeter Models 5000N/5100/5110
- 16 -
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
Low battery indicators
AC Supply: 110/220V, 47 to 450Hz AC ± 20%
Dielectric Test: 4000VAC, 60Hz, 1 minute
Overload: 600Vrms between one terminal and the other two
Meter Movement/Display:
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)
Temperature Range: 14° to 131°F (-10 to 55°C)
Field Case:
High impact, fiberglass charged polycarbonate (fire resistant UL94);
sealed and weatherproofed; rainproof when closed
Terminals:
Color-coded safety terminals; guard terminal minimizes surface
leakage errors
Safety Standards:
4000V dielectric test
Double insulation
IEC 348
Electromagnetic Compatibility:
CEI 801-2: Electrical Discharge. Class II
CEI 801-3: Magnetic Fields 3V/m
CEI 801-4: Rapid Transients class II
CEI 801-5: Electrical shock (5KV 2 Joules)

Megohmmeter Models 5000N/5100/5110
- 17 -
Control & Connector Identification
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PUSH AND TURN
TO LOCK "ON"
!
OFF
ON
V
Ω
660V max.
+ EARTH
GUARD
Ñ LINE
– +
LOW CHARGING
!
50/60/400Hz
CLOCK / TIMER RESET
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MEGOHMMETER MODEL 5100
AEMC
INSTRUMENTS
110V
1
2
3
4
5 6 7 8 9
12
13
10
11
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):
Connects to ground for insulation testing.
3. GUARD terminal (blue):
Used to minimize the effect of leakage current.
4. LINE terminal (black):
Connects to the equipment to be tested.
5. High Voltage Indicator:
Red light blinks when the measurement voltage is on the output
terminals. An audible “beep” is also emitted approx. every 6
seconds.
6. Battery Low Indicator:
Light OFF: battery good
Light ON: battery partially discharged. (Measurements possible for
20-60 minutes depending on voltage selection. Clock and voltmeter
still operational).

Megohmmeter Models 5000N/5100/5110
- 18 -
7. Charging Light:
Indicates the battery is charging or operation from AC supply
8. Power Line Socket
9. Fuse Socket:
Select 110/220V with small connector in this socket.
NOTE: When switching the power supply between 110V and 220V,
the selection module must be changed accordingly. Change fuse
before making any connections.
10. Analog Measurement Scale (Model 5110 has color scale)
11. Zero Adjust
12. Reset Button:
Resets chronometer and selects time values during programming.
13. Clock/Timer:
Toggles between the clock and timer on the display.
14. LCD Display: Clock or timer.
15. Selection Switch
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 the rechargeable
battery. Verify that “110V” appears in the power supply module window
opening; this will permit operation with the 110V supply cord.
To change the power supply voltage selection, push the tab on the
selection module to the right and remove the module. Remove the
portion of the module that contains the fuse assembly and rotate 180° to
display “220V” in the module window. A 220V supply cord (not supplied)
is required for 220V operation.
CAUTION: Do not change the power supply voltage while operating
either Model 5100 or Model 5110 from the AC supply.
Both Models are protected by a 3.15A, 250V fuse (Cat. #1007.26).