Aemc instruments 1100N, 1000N User Manual

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USER MANUAL

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- GUARD- LINE

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The Megohmmeter Models 1000N and 1100N are warranted to the
owner for a period of 1 year 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 purchased. This
warranty is void if the unit has been tampered with, abused or if the
defect is related to service not performed by AEMC

®

What AEMC

Instruments Will Do:

If a malfunction occ urs within the 1

®

Instruments.

year period, you may return the instrument to us for repair or
replacement free of charge, provided we have your REGISTRATION
CARD on file. AEMC

®

Instruments will, at its opt ion, repair or repl ace the

faulty material.

Note: If a registration card is not on file, we will require a dated
proof of purchase as well as your REGISTRATION CARD
accompanied by the defective material.

REGISTER ON LINE AT:

www.aemc.com

®

What You Must Do:

or by fax from AEMC

First request a return authori zation form by phone

®

Instruments, then return the instrum ent along with
the signed authorization repair form. Return material, postage pre-paid
to:

Chauvin Arnoux
d.b.a. AEMC

®

, Inc.

®

Instruments
Service Department
15 Faraday Drive
Dover, NH 03820 USA
Tel: [phone] (X360)

[phone] (X360)

Fax: [phone]

Caution:

To protect against in-transit loss, we recommend you insure

your returned material.

For full warranty coverage, please r ead the Warranty Ca rd which is
affixed to the Warrant y Regist ratio n Card . Pleas e keep t he W arrant y
Card with your records.

- 1 -

Table of Contents

Warning ........................................................................................... 4

International Electrical Symbols ...................................................... 4

Megohmmeter Model 1000N

Receiving Your Shipment ......................................................... 5

Packaging ................................................................................. 5

Accessories and Replacement Parts........................................ 5

Description ................................................................................ 6

Specifications............................................................................ 7

Control and Connector Identification......................................... 9

Battery Replacement .............................................................. 10

AC Supply Module .................................................................. 10

......................................................... 5

Operation

Understanding Insulation Testing

...................................................................................... 11

The Analog Scale.................................................................... 11

Preliminary Check................................................................... 12

How to use the Push-to-Measure Button................................ 12

Utilizing the Guard Terminal ................................................... 13

Voltage Measurements (Safety Check).................................. 14

Audible Signal......................................................................... 15

Precautions When Making DC Insulation Tests ..................... 15

Insulation Measurement - Connections .................................. 16

Insulation Resistance Measurements on Motors.................... 19

............................................. 21

Types of Tests......................................................................... 22

Spot Reading Test............................................................ 22

Ratio Testing .................................................................... 22

Dielectric Absorption Test................................................. 23

Step Voltage Test............................................................. 24

Effects of Temperature ........................................................... 25

Interpreting the Results........................................................... 26

- 2 -

ESD Conductivity Test Kit Megohmmeter Model 1100N

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 ............................................................ 34

Maintenance................................................................................... 35

Cleaning................................................................................... 35

Repair and Calibration .................................................................. 36

Technical Assistance .................................................................... 36

......... 27

- 3 -

Megohmmeter Model 1000N/1100N

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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
measurements (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 em ploy all
safety precautions to prevent electrical shock to themselves
and to others.

•

AEMC

•

When testing capaci tance sam ples , m ak e sure that they h ave

•

Megohmmeters should never be used in an explosive

•

Use the leads supplied with the megohmmeters. If they are

®

considers the use of rubber gloves to be an excellent
safety practice even if the equipment is pro per l y oper ate d and
correctly grounded.

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.

environment.

defective or worn, replace before testing.

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This symbol signif ies that the instrument is protected b y double
or reinforced insulation. Use only specified replacement parts
when servicing the instrum ent.

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.

- 4 -

Megohmmeter Model 1000N/1100N

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Upon receiving your shipment, make sure that the contents are
consistent with the packing list. Notify your distributor of any missing
items. If the equipm ent appears to be damaged, f ile a c laim immediatel y
with the carrier and notify your distributor at once, giving a detailed
description of any damage.

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The Megohmmeter Model 1000N (Cat. #185.100) is ship ped with eight

1.5V “AA” batteries, two color- coded safety leads with insulated all igator
clips, a separate shielded lead, a separate insulated alligator clip, test
probe, one spare fuse, carrying case and instruction manual.

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AC power supply module with line cord and plug for
switch-selectable 110/220V

AC

at 47 to 400Hz.....................

Cat. #100.142

Protective rubber case with handle ......................................

Rugged plastic carrying case, 19 x 14 x 7" ..........................

Fuse, set of five, 0.1A slow-blow for AC supply module ......

Fuse, set of one, 0.3A, for Model 1000 ................................

One test probe and one insulated alligator clip....................

Replacement leads for Models 1000N/1100N/5000N..........

7-pin shielded lead, 10 ft, for Models 1000N/5000N/5100...

Replacement Leads for Model 1000

Coaxial shielded lead ...........................................................

Set of leads: one coaxial shielded lead, pair of

safety leads, alligator clip, and test probe ............................

- 5 -

Cat. #2980.02
Cat. #2118.07
Cat. #100.438
Cat. #100.429
Cat. #100.404
Cat. #1017.23
Cat. #2950.10

Cat. #100.439

Cat. #100.482

Megohmmeter Model 1000N/1100N

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The AEMC® Model 1000N (Cat. #185.100) is a portable, multi-range,
high-sensitivity megohmmeter capable of measuring a wide range of
insulation resistanc es from 1 kilohm to 1000 gi gohms. The Model 10 00N
has five test voltages of 50, 100, 250, 50 0 and 1000V. E ach test vo ltage
setting has two resistance ranges: 1 to 1000MΩ and 1 to 1000GΩ.

In addition, the Mode l 1000N has a unique lo w insulat ion test ra nge of 1
to 1000kΩ with a constant current of 1mA (maximum voltage of

DC

1200V
voltmeter (safety check) with a range of 0 to 600V is standard.

The Model 1000N may be powered by either AC or DC. DC power is
supplied by eight 1. 5V alkaline “AA” batteri es. As an option, an AC line
supply module and c ord for 110/220V
in the battery compartment.

An audible signal consisting of approximately ten beeps per minute is
present when the megohmm eter 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-T O-T EST button is depress ed. It also
serves as a warning li ght when the instrument is in us e, indicating that
the selected test voltage is present at the terminals.

), which is useful for testing old or flooded installations. A

AC

at 47 to 400Hz can be i nserted

- 6 -

Megohmmeter Model 1000N/1100N

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INSULATION TESTS

DC Test Voltages:

50, 100, 250, 500, 1000V

Megohm Ranges:

For each test voltage two direct reading ranges:
1 to 1000M
1 to 1000G

Ω
Ω

Short Circuit Current:
Accuracy:

Charging Time:

1000 MΩ range: 0.3 seconds/µF
1000 GΩ range: 4 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

5% of reading typical
15% of reading between 100 and 1000GΩ on the 50V range

5mA (max)

RESISTANCE TESTS

Test Current:
Kilohm Range:
Maximum Test Voltage:
Accuracy:

Constant 1mA DC

1 to 1000kΩ (1MΩ)

1200V

5% of reading typical

DC

CONTINUITY TESTS

Resistance Range:

0.1 to 100Ω; 3Ω mid-scale

Accuracy:
Audible Tone:
Fuse:

6% of reading

Continuous for continuity resistances under 200

High interrupting capacity (0.315A)

Ω

- 7 -

Megohmmeter Model 1000N/1100N

VOLTAGE TESTS (SAFETY CHECK)

Voltage Range:
Accuracy:

3% of full scale

0 to 600V

AC/DC

GENERAL SP E CIFICATIONS

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; 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

AC

Dielectric Test:

4000V

Fuse Protection:

0.3A high interrupting capacity fuse between line and guard terminals

Meter Movement:
Dimensions:
Weight:

2.2 lbs (1 kg)

Rugged taut band suspension

7.7 x 5.2 x 3.75" (196 x 132 x 95mm)

Temperature Range:

, 50/60Hz, 1 minute

23° to 122°F (-5° to +50°C)

Case:

High impact gray polycarbonate

Terminals:

Color-coded safety terminals; guard terminal eliminates surface leakage
errors

- 8 -

Megohmmeter Model 1000N/1100N

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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.

3. Mechanical Zero Adjust

4. Selection Switch

5. GUARD terminal (blue):
Used to minimize the effect of leakage current.
Also used for the 10Ω range.

6. LINE terminal (black):
Connects to the equipment to be tested.

7. EARTH terminal (green):
Connects to ground for insulation testing.

8. 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

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- GUARD- LINE

- 9 -

Megohmmeter Model 1000N/1100N

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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

screws

Access panel

•

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.

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The optional AC supply module (Cat. #100 .142) provides power to the
Model 1000N at 110 or 220V
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 corn er screws, making sure not to p inch 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 AC supply cord into the appropriate voltage receptacle.

AC

. The AC power supply module is

- 10 -

Megohmmeter Model 1000N/1100N

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Before taking any measurements, verify that the pointer is zeroed
correctly (AC scale "0"). If it is not , adjust w ith th e mechanical zero
adjust screw.

The analog scale serves two functions. First, it indicates the actual
resistance of the insulating material under test (black scales). The top
scale is used for measur ement on the MΩ and GΩ ranges. The bottom
half (MΩ) covers the range of 1MΩ to 1000MΩ, reading from left to r ight
The upper portion of th e s c ale (GΩ) covers the rang e of 1GΩ to 1000G
and reads left to right.

The center scale is used for the low insulation test range of 1kΩ to
1000kΩ, reading from right to left.

The bottom arc is an AC/DC voltmeter which is divided into 10-volt
increments. The voltm eter function is operable any tim e the PUSH-TO­TEST button is out. The voltmeter detects th e pres ence of volt age on the
equipment to be test ed.

the insulation test.)

The voltmeter function also indicates if, after completing insulation
testing, the samp le un der tes t has s tore d a dangerous c a pac it i ve c harge.
The instrument disc harges th is capac itance intern ally an d the need le wil l
drop accordingly. Disconnect the meter when the sample is discharged.

(If voltage is detected, do not proceed with

Ω

Warning:

Electrical equipm ent an d cab les m a y have suff icient cap acit ance t o s tore
a dangerous charge from the instrument test current. For proper
discharge to occur the PUSH-TO-TEST button must be in the OFF
position with the sample connected between the EARTH and LINE
terminals.

On prolonged tests, the PUSH-TO-TEST button may be locked in the ON
position; care should be tak en in this m ode th at no d am age is do ne if the
instrument is left unattended.

- 11 -