AEMC instruments 1015 User manual

ENGLISH
Megohmmeter
Model 1015
User Manual
ENGLISH
MEGOHMMETERS
WITH AEMC
®
INSTRUMENTS

Copyright©Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments. All rights reserved.
No part of this documentation may be reproduced in any form or by any means (including electronic
storage and retrieval or translation into any other language) without prior agreement and written consent
from Chauvin Arnoux®, Inc., as governed by United States and International copyright laws.
Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
15 Faraday Drive • Dover, NH 03820 USA
Tel: [phone] or [phone] • Fax: [phone]
This documentation is provided “as is,” without warranty of any kind, express, implied, or otherwise.
Chauvin Arnoux®, Inc. has made every reasonable e󰀨ort to ensure that this documentation is accurate;
but does not warrant the accuracy or completeness of the text, graphics, or other information contained
in this documentation. Chauvin Arnoux®, Inc. shall not be liable for any damages, special, indirect,
incidental, or inconsequential; including (but not limited to) physical, emotional or monetary damages
due to lost revenues or lost prots that may result from the use of this documentation, whether or not the
user of the documentation has been advised of the possibility of such damages.

Statement of Compliance
Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments
certies 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 specications.
An NIST traceable certicate 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 ll in the appropriate date as indicated:
Date Received:
Date Calibration Due:
Chauvin Arnoux®, Inc.
d.b.a AEMC®Instruments
www.aemc.com

TABLE OF CONTENTS
1. INTRODUCTION ................................................................................ 5
1.1 PRECAUTIONS FOR USE ........................................................ 6
1.2 RECEIVING YOUR SHIPMENT................................................ 6
1.3 ORDERING INFORMATION..................................................... 7
1.3.1 Accessories and Replacement Parts............................................. 7
2. PRODUCT FEATURES ..................................................................... 8
2.1 DESCRIPTION ........................................................................... 8
2.2 FEATURES ................................................................................. 8
2.3 CONTROL FEATURES ............................................................. 9
3. SPECIFICATIONS ............................................................................ 10
3.1 ELECTRICAL SPECIFICATIONS ........................................... 10
3.2 GENERAL SPECIFICATIONS ................................................ 11
3.3 SAFETY SPECIFICATIONS ................................................... 11
4. OPER ATION ..................................................................................... 12
4.1 SAFETY CHECK (VOLTAGE TEST)....................................... 12
4.2 INSULATION RESISTANCE TESTING (MΩRANGE).......... 12
4.2.1 Test Voltage ................................................................................. 12
4.2.2 Spot Testing................................................................................. 13
4.2.3 Ratio Testing................................................................................ 13
4.2.4
Tips For Successful Insulation Resistance Testing .......................... 14
4.2.5 Insulation Measurement - Connections....................................... 14
4.2.6 Insulation Resistance Measurements on Motors ........................ 17
4.3 CONTINUITY MEASUREMENTS .......................................... 18
4.4 RESISTANCE MEASUREMENTS.......................................... 19
5. MAINTENANCE ............................................................................... 20
5.1 BATTERY TEST ....................................................................... 20
5.1.1 Battery and Fuse Replacement.................................................... 20
5.2 CLEANING ............................................................................... 21
5.3 REPAIR AND CALIBRATION ................................................. 22
5.4 TECHNICAL ASSISTANCE .................................................... 22
5.5 LIMITED WARRANTY............................................................. 23
5.5.1 Warranty Repairs ......................................................................... 23

Megohmmeter Model 1015 5
1. INTRODUCTION
Thank you for purchasing an AEMC®Instruments Megohmmeter Model 1015.
For the best results from your instrument and for your safety, you must
read the enclosed operating instructions carefully and comply with the
precautions for use. Only qualied and trained operators should use this
product.
Symbols
Signies that the instrument is protected by double or reinforced insulation
CAUTION - Risk of Danger! Indicates a WARNING. Whenever this symbol is
present, the operator must refer to the user manual before operation
Indicates a risk of electric shock. The voltage at the parts marked with this
symbol may be dangerous
Important information to acknowledge
This product complies with the Low Voltage & Electromagnetic Compatibility
European directives (73/23/CEE & 89/336/CEE)
In the European Union, this product is subject to a separate collection system
for recycling electrical and electronic components in accordance with directive
WEEE 2002/96/EC
Denition of Measurement Categories (CAT)
CAT IV corresponds to measurements performed at the primary electrical
supply (< 1000 V).
Example: primary overcurrent protection devices, ripple control units, and
meters.
CAT III corresponds to measurements performed in the building installa-
tion at the distribution level.
Example: hardwired equipment in xed installation and circuit breakers.
CAT II corresponds to measurements performed on circuits directly con-
nected to the electrical distribution system.
Example: measurements on household appliances and portable tools.

6 Megohmmeter Model 1015
1.1 PRECAUTIONS FOR USE
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
information 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 to 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. Dielectric insulation
samples should be short-circuited for at least ve times the amount of
time they were energized.
Never open the back of the instrument while connected to any circuit or
input.
1.2 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, le a claim immediately with the car-
rier and notify your distributor at once, giving a detailed description of any
damage. Save the damaged packing container to substantiate your claim.

Megohmmeter Model 1015 7
1.3 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),
(4) 1.5 V alkaline AA batteries (not installed), and a user manual.
1.3.1 Accessories and Replacement Parts
Lead - set of 2, 5 ft silicone color-coded (red/black) with 4 mm
straight/right banana plugs (rated 1000 V, CAT IV, UL) ............Cat. #5000.94
Clip - Safety Alligator - black (1000 V CAT IV, 15 A, UL V2).....Cat. #5000.99
Probe - black test probe (rated 1000 V CAT IV, 15 A,UL V2).... Cat. #5000.97
Carrying Case ............................................................................Cat. #2119.02
Fuses, set of 5, 1.6 A................................................................. Cat. #2970.22
.
Order Accessories and Replacement Parts Directly Online
Check our Storefront at www.aemc.com/store for availability

8 Megohmmeter Model 1015
2. PRODUCT FEATURES
2.1 DESCRIPTION
The Megohmmeter Model 1015 is a True Megohmmeter®analog instru-
ment with four easy-to-read scales.
The MΩscale is an easy-to-read log scale graduated from 0.1 to 1000
MΩ(yellow background) at 500 V and 1000 V. The Ωscale is linear with a
range from (0 to 10) Ω(white background).
To use the (0 to 1000) Ωscale, take the reading on the (0 to 10) Ωrange
and multiply the reading by 100. The AC voltage scale is linear with a
range of (0 to 600) VAC (white background). Continuity tests are done with
a test current of 200 mA.
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 600) VAC is standard and
works when the selector switch is in the 500 V position or the 1000 V posi-
tion.
2.2 FEATURES
• Measures insulation at 1000 V
• (0 to 1000) Ωresistance range
• Push button for battery check
• Designed for harsh environments: o󰀨shore, mining, heavy-duty eld,
industrial, commercial electrical and military use
• (0 to 10) Ω+ and (0 to 10) Ω- continuity ranges
• Continuity 200 mA test current
• Small and lightweight
• Large, direct-reading, colored scale
• 600 V test voltage range (safety check)
• Yellow non-slip shockproof case
• True Megohmmeter®

Megohmmeter Model 1015 9
2.3 CONTROL FEATURES
Figure 2
1. Line (–) terminal
2. Earth/Ground (+) terminal
3. Mechanical zero adjustment screws
4. 4-position rotary switch
5. Protective rubber housing
6. Push-to-test button
7. Battery check and indication display
–
1 2
3
4
5
6
7

10 Megohmmeter Model 1015
3. SPECIFICATIONS
3.1 ELECTRICAL SPECIFICATIONS
INSULATION TESTS
DC Test Voltage: 500 V and 1000 V
Megohm Range: (0.1 to 1000) MΩ
Short Circuit Current: ≤ 6 mA
Accuracy: ±5 % of reading
Discharging Time (Auto): 1 s/µF
CONTINUITY TESTS
Range: (0 to 10) Ω-; (0 to 10) Ω+
Short Circuit Current: ≥ 200 mA
Open Circuit Voltage: (4.5 to 6.5) V
Accuracy: ±3 % full scale
RESISTANCE TESTS
Range: (0 to 1000) Ω
Short Circuit Current: ≥ 2 mA
Open Circuit Voltage: (4.5 to 6.5) V
Accuracy: ±3 % full scale
VOLTAGE TESTS (Safety Check)
Voltage Range: (0 to 600) VAC
Frequency: (45 to 400) Hz
Accuracy: 3 % of full scale
Input Impedance: 300 kΩ

Megohmmeter Model 1015 11
3.2 GENERAL SPECIFICATIONS
Power Supply: Four 1.5 V AA batteries
Dielectric Test: 6000 V, 50/60 Hz, 1 m
Meter Movement: Rugged taut band suspension
Dimensions: (6.6 x 4.2 x 2.2) in (167 x 106 x 55) mm
Weight: 1.45 lb (650 g)
Operating Temperature Range: ( 14 to 131) °F (-10 to 55) °C, (20 to 80) % RH
Storage Range: (-40 to 158) °F (-40 to 70) °C, (10 to 90) % RH
Terminals: “-” Line (black); “+” earth (red); accepts 4 mm banana plugs
Reference Conditions: (63 to 73) °F (17 to 23) °C, (45 to 55) % RH; Supply Voltage:
(5.3 to 5.7) V; Voltage Frequency: (45 to 65) Hz; Electric Field: < 1 V/M; Magnetic
Field: < 40 A/M; Position: Horizontal ± 5°.
3.3 SAFETY SPECIFICATIONS
IEC 1010-1: Safety requirements for electrical equipment for measure-
ment, control and laboratory use
VDE 0413-1: Insulation testers
VDE 0413-4: Ohmmeters
VDE 0100: Specications 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 elds
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
Specications are subject to change at any time without notice

12 Megohmmeter Model 1015
4. OPERATION
4.1 SAFETY CHECK (VOLTAGE TEST)
WARNING: Make sure the jacks are rmly inserted into the top of
the megohmmeter prior to performing any electrical tests!
Before measuring insulation resistance, conrm 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:
• Set the range selection to MΩ500 V or MΩ1000 V
• Connect and read on the voltage scale (600 VAC max)
You do not need to press the yellow button to measure voltage.
NOTE: If measuring voltage on a DC circuit, the pointer will deect
but the measurement may be inaccurate.
4.2 INSULATION RESISTANCE TESTING (MΩ 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 115 250 V
115 250 V or 500 V
230 500 V
460 500 V or 1000 V

Megohmmeter Model 1015 13
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 xed 60 sec-
onds.
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 2MΩ
460 2MΩ
There is no xed gure 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 gure. This applies to motors and
transformers. When the insulation resistance gets this low, an electri-
cal breakdown can be expected at any time, 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. #43-1974: 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 @ 60 s = Dielectric Absorption Ratio (DAR)
Insulation resistance @ 30 s
This test is useful to increase the accuracy of spot testing. In general, a
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 specic 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.

14 Megohmmeter Model 1015
4.2.4 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 winding
conditions.
• Do not expect the same value for all parts of all machines.
• Observe consistent 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.
4.2.5 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.
Figure 3
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
Cable Insulation
Conductor Under Test
+
-

Megohmmeter Model 1015 15
Figures 4 and 5 show the connections for testing insulation from a supply
conductor to ground (motor frame).
Figure 4
Figure 5
Cable Insulation
Conductor Under Test
+
-
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
Cable Insulation
Conductor Under Test
+
-
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ

16 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
+
-
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
Tested Winding
Transformer
Grounding Lug
-+
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
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 conduc-
tors 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.
Figure 6
Figure 7

Megohmmeter Model 1015 17
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.
Read between phases “A” and “B”,
then “B” and “C”, then “C” and “A”.
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
A
B
C
+
-
Figure 9
+
-
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ

18 Megohmmeter Model 1015
Figure 10 shows connec-
tions 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.
4.3 CONTINUITY MEASUREMENTS
Once it has been veried that no voltage is present, the continuity check
may be performed.
• Set the switch to the 10 Ω+ position. The measurement is done
automatically; you do not need to press the yellow button.
• Read the value on the white scale (0 to 10) Ω.
• Set the switch to the 10 Ω– position and make sure that the needle of the
instrument reads the same value. If the second value is di󰀨erent from the
preceding one, add up the two readings and divide by two. The reason for
taking two di󰀨erent readings is to comply with the international 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.
NOTE: For better measurement accuracy on the 10 Ω+ and
the 10 Ω– ranges, measure the resistance of the leads by short-
circuiting them, then subtract this value from the measured values.
Motor Side
of Switch:
Connection
to One Leg
Grounded
Motor Frame
Starter In
+
-
OFF
MΩ- 1000 V
MΩ- 500 V
1000 Ω
AEMC
INSTRUMENTS
MEGOHMMETER
MODEL 1015
Battery
Check
10 Ω +
10 Ω −
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
Figure 10

Megohmmeter Model 1015 19
4.4 RESISTANCE MEASUREMENTS
• Set the switch to the 1000 Ωposition. The measurement is done
automatically; you do not need to press the yellow button.
• Read the value on the white scale (0 to 10) Ω, then multiply the reading by
100 to get the actual value measured.
• Return to OFF after use.

20 Megohmmeter Model 1015
5. MAINTENANCE
The device does not contain any parts that can be replaced by untrained
or unaccredited personnel. Any unauthorized work or part replacement
with equivalents may seriously compromise safety.
WARNING:
• For maintenance use only specied replacement parts.
• To avoid electrical shock, do not attempt to perform any servicing unless
you are qualied 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 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 in the red zone or lower.
The average battery life is:
• 1000 insulation measurements of 10 s on the MΩ-500 V range for R = 500 kΩ.
• 200 insulation measurements of 10 s on the MΩ-1000 V range for R = 1 MΩ.
• 1500 continuity measurements of 10 s on the 10 Ωrange.
NOTE: The instrument will operate correctly with a battery voltage
range of (4.5 to 6.5) V.
5.1.1 Battery and Fuse Replacement
0
.
1
0
.
5
1
5
1
0
5
0
1
0
0
5
0
0
1
0
0
0
0
1
2
3
4
5
6
7
8
9
1
0
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
V
600V
-
+
6
!
MΩ
RED zone or below:
Battery needs to be replaced
GREEN zone:
Battery is good