AEMC 6524, 6522 Operating Manual

Megohmmeters
Model 6522 & 6524

User Manual

ENGLISH

www.aemc.com

®

CHAUVIN ARNOUX GROUP

Statement of Compliance

Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments
certifies 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 specifications.

An NIST traceable certificate 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 #: 2155.51 / 2155.52

Model #: 6522 / 6524

Please fill in the appropriate date as indicated:

Date Received: _________________________________

Date Calibration Due:

_______________________

Chauvin Arnoux®, Inc.
d.b.a AEMC® Instruments

www.aemc.com

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.

Chauvin Arnoux®, Inc and AEMC® are registered trademarks of AEMC® Instruments.

Thank you for purchasing the Megohmmeter Model 6522 or 6524.

For best results from your instrument:

■ Read these operating instructions carefully

■ Comply with the precautions for use

WARNING, risk of DANGER! The operator must refer to these
instructions whenever this danger symbol appears

WARNING, risk of electric shock. The voltage applied to parts
marked with this symbol may be hazardous

Equipment is protected by double insulation

> 700V

The voltage on the terminals must not exceed 700V

Ground/Earth

Battery

Information or useful tip

Remote test probe

The product is recyclable in accordance with standard ISO14040

This instrument exceeds regulatory requirements with respect to
recycling and reuse

Indicates conformity with European directives, in particular LVD and

EMC

Indicates that, in the European Union, the instrument must undergo

selective disposal in compliance with Directive WEEE 2002/96/EC.

This instrument must not be treated as household waste

Denition of Measurement Categories (CAT)

■ CAT II corresponds to measurements taken on circuits directly connected to
low-voltage installations.
Example: power supply to electro-domestic devices and portable tools.

■ CAT III corresponds to measurements on building installations.
Example: distribution panel, circuit-breakers, machines or xed industrial

devices.

■ CAT IV corresponds to measurements taken at the source of low-voltage

installations.
Example: power feeders and protection devices.

PRECAUTIONS FOR USE

This instrument is compliant with safety standard IEC 61010-2-030, and the leads
are compliant with IEC 61010-031, for voltages up to 600V in CAT IV or 1000V in

CAT III.

Failure to observe the following safety instructions may result in electric shock,

re, explosion, and damage to the instrument and installation.

■ Carefully read and understand all precautions for use.

■ Be aware of all electrical hazards when using this instrument.

■ Using this instrument other than as specied may compromise its user

protection features.

■ The safety of any system in which this instrument is incorporated is the

responsibility of the integrator of the system.

■ This instrument can be used on CAT IV installations, for voltages

not exceeding 600V

RMS

with respect to ground or 700V

between terminals.

■ Do not use the instrument on networks whose voltage or category

exceeds those specied in this manual.

■ Observe all environmental conditions of use (see § 3).

■ Except for voltage measurements, take no measurements on

electrically “live” systems.

■ Do not use the instrument if it appears damaged, incomplete, or poorly

closed.

■ Before each use, check the condition of the insulation on the leads,

housing, and accessories. Any part on which the insulation is
deteriorated (even partially) must be set aside for repair or scrapping.

■ Using the instrument without its battery compartment cover may result

in electric shock to the user.

■ Before using your instrument, ensure it is completely dry.

■ Use only the leads and accessories supplied. The use of leads (or

other accessories) of a lower voltage rating or category limits the use
of the instrument/leads (or accessories) combination to the lowest
category and service voltage.

■ When handling the leads, test probes, and alligator clips, keep your

ngers behind the physical guards.

■ Before removing the battery compartment cover, ensure all

measurement leads and accessories are disconnected. Replace all
batteries at once. Use alkaline batteries.

■ Use personal protection equipment where appropriate.

■ All troubleshooting and metrological checks must be done by

competent, accredited personnel.

RMS

maximum

Table of Contents

1. INTRODUCTION .....................................................................4

1.1 Receiving Your Shipment......................................................................4

1.2 Accessories...........................................................................................5

1.3 Replacement Parts ...............................................................................5

1.4 Description ............................................................................................5

1.4.1 Model 6522 (Front) ...................................................................6

1.4.2 Model 6524 (Front) ...................................................................7

1.5 Back of Instrument ................................................................................8

1.6 Terminals ..............................................................................................9

1.7 Function Buttons ...................................................................................9

1.8 LCD Display .......................................................................................10

2. OPERATION .......................................................................... 11

2.1 Setting Up the Instrument ...................................................................11

2.1.1 Conguration Settings ...........................................................11

2.1.2 Alarms.....................................................................................12

2.1.2.1 Activating/Deactivating the Alarm Function ....................12

2.1.2.2 Setting an Alarm Threshold ............................................13

2.1.2.3 Viewing Alarms ..............................................................14

2.1.3 ∆REL Function (Model 6524) .................................................15

2.1.4 HOLD Function.......................................................................16

2.1.5 Backlighting ............................................................................16

2.1.6 Standby Mode ........................................................................16

2.2 Taking Measurements .........................................................................17

2.2.1 Voltage Measurement.............................................................17

2.2.2 Insulation Measurement .........................................................18

2.2.2.1 TEST Button Operation ..................................................20

2.2.2.2 Timed Tests ...................................................................21

2.2.2.3 Remote Control Probe (Optional) ..................................22

2.2.3 Continuity Measurement.........................................................23

2.2.3.1 Lead Compensation .......................................................23

2.2.3.2 Continuity Measuring .....................................................24

2.2.4 Resistance Measurement (Model 6524).................................25

2.3 Recording Data (Model 6524).............................................................26

2.3.1 Recording a Measurement .....................................................26

2.3.2 Viewing Stored Recordings ....................................................27

2

Megohmmeter Model 6522/6524

2.3.3 Deleting Recordings ...............................................................28

2.3.3.1 Deleting a Single Recording ..........................................28

2.3.3.2 Deleting All Recordings ..................................................28

3. SPECIFICATIONS ................................................................. 29

3.1 General Reference Conditions ...........................................................29

3.2 Electrical Specications ......................................................................29

3.2.1 Voltage Measurement.............................................................29

3.2.2 Frequency Measurement........................................................30

3.2.3 Insulation Measurement .........................................................30

3.2.4 Continuity Measurement.........................................................32

3.2.5 Resistance Measurement (Model 6524).................................32

3.2.6 Timer.......................................................................................32

3.2.7 Storage Memory (Model 6524) ...............................................33

3.3 Operating Environment .......................................................................33

3.3.1 Voltage Measurement.............................................................33

3.3.2 Insulation Measurement .........................................................34

3.3.3 Resistance and Continuity Measurement ...............................35

3.3.4 Intrinsic Uncertainty and Operating Uncertainty .....................36

3.4 Power Supply......................................................................................36

3.5 Environmental Conditions ...................................................................36

3.6 Mechanical Specications .................................................................37

3.7 Safety Standards ................................................................................37

4. MAINTENANCE & TROUBLESHOOTING ...............................38

4.1 Maintenance .......................................................................................38

4.1.1 Cleaning .................................................................................38

4.1.2 Replacing the Batteries ..........................................................38

4.2 Troubleshooting ..................................................................................40

4.2.1 Errors ......................................................................................40

4.2.1.1 Voltage present before an insulation measurement.......40

4.2.1.2 Range exceeded during an insulation measurement.....40

4.2.1.3 Voltage during continuity/resistance/measurement .......41

4.2.1.4 Memory full (Model 6524) ..............................................41

4.2.2 Resetting the Instrument ........................................................41

4.3 Repair and Calibration ........................................................................42

4.4 Technical and Sales Assistance ..........................................................42

4.5 Limited Warranty .................................................................................43

4.6 Warranty Repairs ................................................................................43

Megohmmeter Model 6522/6524

3

1. INTRODUCTION

1.1 Receiving Your Shipment

Upon receiving your megohmmeter product package, ensure 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 carrier

and notify your distributor at once, providing a detailed description. Save the
damaged packing container to substantiate your claim.

Ordering Information:

Megohmmeter Model 6522.............................................................. Cat. #2155.51

Megohmmeter Model 6524.............................................................. Cat. #2155.52

Shipping Contents:

One of the following:

Megohmmeter Model 6522

Megohmmeter Model 6524

Both models also include 6 AA batteries and a user manual.

4

or

Soft Carrying Case

Two 1.5m test leads (red/black), two alligator clips

(red/black), 1 test probe (black)

Megohmmeter Model 6522/6524

1.2 Accessories

Megohmmeter Test Probe ................................................................ Cat. #2155.75

Case - Field Case (Waterproof) ........................................................ Cat. #2118.98

Case - Hands Free Carrying Case ................................................... Cat. #2118.99

Continuity Pole .................................................................................Cat. #2138.54

Probe - Set of 2, Color-coded (Red/Black) Grip Probes ................... Cat. #2152.26

1.3 Replacement Parts

Lead - Set of 2, Color-coded 5 ft (Red/Black) Silicone Leads, Test Probes &

Alligator Clips {Rated 1000V CAT IV} ............................................... Cat. #2152.05

For accessories and replacement parts, visit our store at www.aemc.com.

1.4 Description

The Megohmmeters Models 6522 and 6524 are portable measuring instruments

with digital displays. They are powered by batteries. These instruments can
check the safety of electrical installations. For example, they can be used to test
new installations before they are powered up, check an existing installation in a

power-o󰀨 condition, or troubleshoot an installation.

Features Include:

Model 6522 Model 6524

Insulation test voltages 250, 500, and

1000V

PI and DAR ratios calculation

Continuity measurement

Resistance measurement

Programmable alarms

Frequency measurement

Storage of the measurements

Megohmmeter Model 6522/6524

 

50, 100, 250, 500, and

1000V








5

1.4.1 Model 6522 (Front)

<

ALARM

HOLD

G VHz
M mAµA

G
M
k

P

1

M

%

G

2

DC
AC

V

HOLD

SET-UP

0

TEST

MΩ

V

Ω

OFF

MEGOHMMETER

MODEL 6522

250V

500V

1000V

Figure 1

1. Input terminals

2. Blue backlit LCD

3. Four function buttons (see § 1.7)

4. TEST button to start insulation measurements (see § 2.2.2.1)

3

4

5

5. Six-position rotary switch to choose the function or to turn the instrument

OFF

6

Megohmmeter Model 6522/6524

1.4.2 Model 6524 (Front)

1

ALARM

HOLD

HOLD

V

Ω

Ω

k

MR

MEM

>

<

DARPI

MEM

REL

TEST

OFF

T1T2

SET-UP

%

G VHz
M mAµA
k

G
M

DC
AC

V

k

P

0

REL

CLR

MΩ

50V

100V

250V

500V

1000V

MEGOHMMETER

MODEL 6524

M

G

2

3

4

5

Figure 2

1. Input terminals

2. Blue backlit LCD

3. Six function buttons (see § 1.7)

4. TEST button to start insulation measurements (see § 2.2.2.1)

5. Ten-position rotary switch to choose the function or to turn the instrument

OFF

Megohmmeter Model 6522/6524

7

1.5 Back of Instrument

1

2

3

4

5

Figure 3

1. Captive quarter-turn screw

2. Battery compartment cover

3. Mounting magnets, molded into instrument case (Model 6524)

4. Non-skid pads

5. Stand

8

Megohmmeter Model 6522/6524

1.6 Terminals

0

> 700V

600V CAT IV

Figure 4

The instrument has one positive ( + ) terminal and one negative ( - ) terminal. The
negative terminal also supports the remote probe accessory (see § 2.2.2.3).

1.7 Function Buttons

In general, each button has two functions. One is marked on the button, and is
enabled via a short press. The second function is marked under the button, and

is enabled by a long (>2 seconds) press.

BUTTON

DESCRIPTION

Selects the , , PI, and DAR functions (§ 2.2.2).

Toggles backlighting ON and OFF (§ 2.1.5).

HOLD

SET-UP

Freezes/unfreezes the displayed measurement on the LCD (§

2.1.4).

Accesses the instrument’s setup parameters and information (§

2.1.1).

Applies lead compensation in continuity testing (§ 2.2.3.1).

(Model 6524) Activates/deactivates alarms (§ 2.1.2).

Modify the display and program the durations of insulation

measurements (§ 2.2.2.2).

 

Choose the continuity test current (§ 2.2.3).

Program the alarm thresholds on the Model 6524 (§ 2.1.2).

∆Rel

(Model 6524) Displays the di󰀨erence between the present
measurement and a stored reference measurement (§ 2.1.3).

MEM (Model 6524) Records measurements (§ 2.3).

CLR (Model 6524) Erase recorded measurements (§ 2.3.3).

Megohmmeter Model 6522/6524

9

1.8 LCD Display

V

%

nF
µF

DC
AC

M

1

G

2

3

4

VAR

MEM

ALARM

>

<

DARPI

T1T2

G VHz
M mAµA
k nF/ km

G
M
k

HOLD

1. Logarithmic bar graph displays insulation measurements

2. Secondary display area

3. Main display area

4. Icons/indicators

When the measured value is below the minimum, the instrument displays - - - - .

When measuring voltage, if the reading falls outside the range dened by the

positive and negative limits, the instrument displays OL or – OL.

REL

Figure 5

P

10

Megohmmeter Model 6522/6524

2. OPERATION



SET-UP

Except when measuring voltage, all measurements must be made on powered­off systems. Therefore check to ensure there is no voltage on the system under
test before making a non-voltage measurement. When the rotary switch is set
to the voltage or an insulation testing position, the instrument measures and
displays any voltage present at the input terminals prior to the user pressing the
test button.

2.1 Setting Up the Instrument

2.1.1 Configuration Settings

A >2 second press of the SET-UP button enables you to
change conguration settings on the instrument. You can
then use the ▲ and ► buttons to scroll through and modify

> 2s

parameters.

In Set-Up mode, the ▲ button performs the following functions:

1st press
on 

Megohmmeter Model 6522/6524

The alarm buzzer is active. To
deactivate it:

1. Press . On will blink to

indicate it is selected.

2. Press  to change the

setting to OFF.

3. Press  to validate the

change.

The symbol disappears from the

display when you exit Set-Up.

Note that this setting reverts to On
when you turn OFF the instrument.

11