AEMC instruments 6505 User manual

MEGOHMMETER 6505
User ManualENGLISH

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®󰀨
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,


user of the documentation has been advised of the possibility of such damages.

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 #: 2130.18
Model #: 6505
Please fill 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 ................................................................................ 6
1.1 PRECAUTIONS FOR USE .................................................. 7
1.2 RECEIVING YOUR SHIPMENT................................................ 7
1.4 ORDERING INFORMATION ..................................................... 8
1.4.1 Accessories....................................................................................8
1.4.2 Replacement Parts.........................................................................8
2. PRODUCT FEATURES...................................................................... 9
2.1 DESCRIPTION ........................................................................... 9
2.2 CONTROL FEATURES............................................................ 10
2.3 SWITCH FUNCTIONS ............................................................. 11
2.4 BUTTON FUNCTIONS ............................................................ 11
2.5 DISPLAY ................................................................................... 12
2.5.1 Digital Display ..............................................................................12
2.5.2 Bargraph Display..........................................................................12
2.5.3 Display Symbols...........................................................................12
3. OPERATION ..................................................................................... 13
3.1 SERIAL NUMBER .................................................................... 13
3.2 SOFTWARE VERSION............................................................ 13
3.3 VOLTAGE MEASUREMENT ................................................... 13
3.4 INSULATION MEASUREMENT ............................................. 14
3.5 PI MEASUREMENT ................................................................. 16
3.5.1 Adjustments of the PI ...................................................................17
3.6 ADJUSTMENT OF THE VARIABLE TEST VOLTAGE........... 18
3.7 ADJUSTMENT OF THE MAXIMUM TEST VOLTAGE........... 18
3.8 ERROR MESSAGES ............................................................... 19
4. SPECIFICATIONS............................................................................ 20
4.1 REFERENCE CONDITIONS................................................... 20
4.2 VOLTAGE.................................................................................. 20
4.3 INSULATION RESISTANCE ................................................... 20
4.3.1 Accuracy in Variable Mode...........................................................21
4.3.2 Measurement of the Test Voltage after a Capacitive Insulation
Measurement ........................................................................................21
4.3.3 Calculation of Terms DAR and PI.................................................21
4.3.4 Typical Change Curve for Test Voltages according to Load.........22
4.4 CAPACITANCE......................................................................... 23
4.5 POWER SUPPLY ..................................................................... 23
4.6 ENVIRONMENTAL SPECIFICATIONS .................................. 23
4.7 MECHANICAL SPECIFICATIONS.......................................... 24

4.8 SAFETY SPECIFICATIONS.................................................... 24
4.9 VARIATIONS IN OPERATING RANGE .................................. 24
5. MAINTENANCE................................................................................ 25
5.1 RECHARGING THE BATTERY............................................... 25
5.2 FUSE REPLACEMENT............................................................ 25
5.3 CLEANING................................................................................ 25
5.4 STORAGE................................................................................. 26
5.5 REPAIR AND CALIBRATION .................................................. 26
5.6 TECHNICAL ASSISTANCE ..................................................... 26
5.7 LIMITED WARRANTY.............................................................. 27
5.8 WARRANTY REPAIRS ............................................................ 27

6 Megohmmeter Model 6505
1. INTRODUCTION
Thank you for purchasing a Megohmmeter Model 6505.
For best results from your instrument and for your safety, read the enclosed
operating instructions carefully and comply with the precautions for use. These

Symbols
Instrument is protected by double or reinforced insulation.
CAUTION - DANGER! Read the User Manual.
Risk of electric shock. The voltage at the parts marked with this
symbol may be dangerous.
Important instructions to read and to fully understand.
Useful information or tip to read.
Battery.
Fuse.
USB socket.
The CE Mark guarantees conformity with European directives and
with regulations covering EMC.


regarding Low-Voltage Safety, Electromagnetic Compatibility, and
the Restriction of Hazardous Substances.
The trash can with a line through it means that, in the European
Union, this product must undergo selective disposal for the recycling
of electric and electronic material in compliance with Directive
WEEE 2002/96/EC.

CAT IV corresponds to measurements taken at the primary electrical supply
(<1000V).
Example: primary overcurrent protection devices, ripple control units, and meters.
CAT III corresponds to measurements taken in building installations at the
distribution level.
Example: distribution panel, circuit-breakers, machines, and xed industrial
devices.
CAT II corresponds to measurements taken on circuits directly connected to low-
voltage installations.
Example: power supple to domestic electrical appliances and portable tools.

Megohmmeter Model 6505 7
1.1 PRECAUTIONS FOR USE
This instrument is protected against accidental voltages of not more than 1000V
with respect to earth in measurement Category III. The protection provided by

manufacturer, or improper ways.
■Make no measurements on conductors likely to be connected to a live source.
■Comply with the rated voltage, maximum current, and measurement category.
■
■Comply with the conditions for use: temperature, humidity, altitude, degree of
pollution, and place of use.
■Do not use the instrument or its accessories if they seem damaged.
■Use only the accessories delivered with the unit compliant with safety
standards (IEC/EN 61010-2-031 or BS EN 61010-2-031).
■Respect the value and type of the fuse (see §5.2) to avoid damaging the
instrument and voiding the warranty.
■Set the switch to OFF when the instrument is not in use.
■
personnel.
■Wear the appropriate protective gear (insulated boots & gloves).
1.2 RECEIVING YOUR SHIPMENT
Upon receiving your shipment, make sure that the contents are consistent with
the ordering information. Notify your distributor of any missing items. If the

notify your distributor at once with a detailed description of any damage. Save
the damaged packing container to substantiate your claim.

8 Megohmmeter Model 6505
1.4 ORDERING INFORMATION
Megohmmeter Model 6505............................................................. Cat. #2130.18
Includes extra-large tool bag, set of 3 color-coded 10ft leads with clips [5000V]
(red, blue, black), one blue guard terminal jumper lead, fuse 0.1A 380V,
rechargeable battery pack (installed), US 115V power cord, and user manual.

Lead – Set of 3, 25 ft (5kV) Safety with Clips................................... Cat. #2151.32
Megohmmeter Calibration Checker.................................................. Cat. #5000.66
1.4.2 Replacement Parts
Fuse – Set of 3, 0.1A, 380V, 5 x 20, 10kA.........................................Cat. #2119.84
Extra Large Tool Bag ........................................................................ Cat. #2133.73
Lead – Replacement set of 3, 10ft (5kV) Color-coded Safety
with Clips (JUMPER LEAD NOT INCLUDED).................................. Cat. #2151.30
Lead – Replacement 1ft Jumper Lead ............................................. Cat. #2151.31
9.6V rechargeable NiMH battery pack.............................................. Cat. #2960.21
Power Cord 115V US Plug ............................................................... Cat. #5000.14

Check our Storefront at www.aemc.com/store for availability

Megohmmeter Model 6505 9
2. PRODUCT FEATURES
2.1 DESCRIPTION

case and operates on battery or line power. It performs voltage, insulation, and
capacitance measurements. This instrument contributes to the safety of electrical
installations and equipment.
Features include automatic calculation and presentation of the Dielectric
Absorption Ratio (DAR) and Polarization Index (PI). The Model 6505 displays
the test voltage, insulation resistance, and leakage current during the test.
Capacitance of the sample and discharge voltage present at the test leads is
displayed at the test’s conclusion.
The Model 6505 is designed with the highest level of built-in safety features. This
meter incorporates test inhibit capabilities that will not allow test voltages to be
generated if a live sample is detected. The test terminals are recessed to ensure
operating safety.
Features:
■Test voltage combination of 500V, 1000V, 2500V, and 5000V.
■
■Adjustable and programmable test voltage (40 to 5100V).
■Automatic calculation of DAR and PI values.
■Direct measurement and display of capacitance and leakage current.
■Display of resistance, test voltage, and run time.
■Programmable test run times and PI ratio times.
■Automatic test inhibition if live sample >40% of test voltage.
■Automatic discharge and display of discharge voltage.
■Large dual-display with time, voltage, and measurements.
■
■Designed and built to IEC safety standards.
■EN 61010-1, 1000V CAT III.

10 Megohmmeter Model 6505
2.2 CONTROL FEATURES
Item 
1Access to the protective fuse and connection terminals “+”, “G”, and
“-”.
2 AC power plug (direct operation on AC and battery recharge).
3 Back-lit crystal display (see §2.5).
4 Serial interface male plug (9-pin) for calibration only.
5 Rotary selector switch with 8 positions (see §2.3).
6 START/STOP button.
7 Two function buttons (see §2.4).
( )
FF 0.1A
380V - 10kA
5x20mm
110 - 230V
50/60 Hz
20 VA max
CALIBRATION
MEGOHMMETER
MODEL 6505
1000V CAT III
2500V
G
DISPLAY
START/STOP
(>2s:DAR-PI )
1
6
7
5
32 4
OFF
M Ω -1000V
M
Ω -2500V
M
Ω - 5000V
M Ω 50-5000V
SET V VAR
SET V LOCK
M Ω - 500V

Megohmmeter Model 6505 11
2.3 SWITCH FUNCTIONS
Range 
OFF Instrument powered down.
 
 
 
 
 Insulation measurement with variable test voltage.
SETV 
position
SETV 
regardless of the insulation measurement positions
2.4 BUTTON FUNCTIONS
Range 
ON/OFF
This button is pressed to start and then stop the
measurement. A long press starts the measurement of the
DAR and PI.
DISPLAY Before, during, or after the measurement, pressing this key
displays the various measurement parameters.

This function is available only in the SET position of the

Used to navigate the list of interval insulation measurements
in the R(t) function.

This function is available only in the SET position of the

Used to navigate the list of interval insulation measurements
in the R(t) function.
NOTE:
parameters will increase.

12 Megohmmeter Model 6505
2.5 DISPLAY


Indicates:
■Value of insulation measurement (resistance, DAR and PI, or capacitance).

Indicates:
■Voltage measured or applied by the instrument.
■Elapsed time or the output voltage during insulation measurement.

Indicates:
■
■Battery charge at start-up.


External voltage present, symbol is activated after pressing START if
V > 25V ± 3V or > 35V
Indicates the duration of the measurement or the time remaining in
the case of PI measurement.
Indicates the battery is low and must be recharged (§5.1).

Megohmmeter Model 6505 13
3. OPERATION
NOTE: Charge the instrument fully before use (see §5.1).
3.1 SERIAL NUMBER
To view the serial number of the instrument, keep the DISPLAY button pressed
and turn the switch to the  position.
3.2 SOFTWARE VERSION
To view the internal software version of the instrument, keep the DISPLAY button
pressed and turn the switch to the position.
Technical documentation on Understanding Insulation Resistance
Testing is available at www.aemc.com/understanding-irt.
3.3 VOLTAGE MEASUREMENT
As soon as the switch is set to an insulation measurement position, the
instrument automatically measures the presence of any AC/DC voltage. This
voltage is measured at all times and indicated on the small display unit.
The instrument automatically determines AC or DC. The AC measurement is an
RMS value.
If an excessively high external voltage is present on the terminals (> 0.4 Un),
pressing the START/STOP󰀨
will be made. Similarly, if an excessively high erroneous voltage (> 0.4 Un) is
detected during the measurement, the measurement will automatically stop.

14 Megohmmeter Model 6505
3.4 INSULATION MEASUREMENT
Depending on the type of measurement, there are three ways to connect the
instrument.
In all cases, disconnect the device to be tested from the source.

Connect the red high-voltage
lead between earth and the +
terminal of the instrument.
Connect the black high-voltage
lead between one phase of the
motor and the - terminal of the
instrument.
M
+
-

For a very high insulation value,
connect the small blue high-
voltage lead between the rear
earth pick-up jack of the black
lead and the Gterminal of the
instrument.
This serves to reduce any

more stable measurement.
M
G
+
-
Cable
Connect the red high-voltage
lead between the braid and the
+terminal of the instrument.
Connect the black high-voltage
lead between the core and the -
terminal of the instrument.
G
+
-
Connect the blue high-voltage lead between the insulation and the Gterminal of
the instrument.
󰀨

Megohmmeter Model 6505 15
Once the connections have been made, choose the desired test voltage on the
rotary switch.
When powered up, the instrument displays the following:
• Condition of the battery.
• Test voltage.
• Voltage present on the object to be tested.
■Press the START/STOP button to start the measurement.
■During measurements, the instrument will beep every 10 seconds to alert the
user that a high voltage is present.
■Press the START/STOP button again to stop the measurement. The
instrument will continue to measure external voltages, but the test result will
remain displayed on the main display unit.
To ensure your safety, the instrument will automatically discharge the
circuit under test, allow for the voltage displayed to fall back below 25V
before disconnecting the leads.

Before the measurement
(2 Presses)
■Voltage present on the device to be tested.
■Test voltage.
■Surface leakage current.
During the measurement
(2 Presses)
■Test voltage.
■Instantaneous insulation resistance value.
■Duration of the measurement.
■
measured.
After the measurement
(5 Presses)
■Voltage present on the device tested.
■Insulation resistance value just before the
measurement was stopped.
■Duration of the measurement.
■Test voltage generated during the measurement.
■
■Surface leakage current.
■Capacitance.

16 Megohmmeter Model 6505
3.5 PI MEASUREMENT
M Ω -1000V
M Ω -1000V
■Set the switch to one of the insulation
measurement positions.
■Start the measurement with a long press (>2s)
on the START/STOP button. The long press will
be acknowledged by an audible beep.
■The measurement starts the default duration
of 10 min. A countdown will display the
time remaining. The measurement will stop
automatically.

Before the measurement
(2 Presses)
■Voltage present on the device to be tested.
■Test voltage.
■Leakage current present.
During the measurement
(4 Presses)
■Measurement time remaining.
■Instantaneous insulation resistance value.
■Test voltage.
■
measured.
■Value of PI (available at the end of 10 minutes).
■Value of DAR (available at the end of one
minute).
After the measurement
(6 Presses)
■Test voltage generated during the measurement.
■PI and DAR.
■Duration of the measurement.
■Insulation resistance value just before the
measurement was stopped.
■
■Voltage present on the device being tested.
■Capacitance.
■Surface leakage current.

PI = R 10 min / R 1 min (2 values to be recorded during a measurement
lasting 10 min).*
DAR = R 1 min / R 30 sec (2 values to be recorded during a measurement
lasting 1 min).
*For the calculation of the PI, the times of 1 and 10 minutes can be modied by the user, if required, for
a particular application. See §3.5.1.

Megohmmeter Model 6505 17
They are especially useful for monitoring insulation deterioration of revolving
machines or very long cables.
On items of this type, the measurement is initially disturbed by spurious currents
(capacitive charging current, dielectric absorption current) that gradually cancel
out. To measure the leakage current representative of the insulation accurately,
measurements with long durations are necessary.
The quality of the insulation is a function of the results found.
DAR PI 
< 1.25 < 1 Inadequate, even dangerous.
< 2
> 1.6 < 4 Good.
> 1.6 > 4 Excellent.


Reminder: PI = R 10 min / R 1 min.

steps.
■Press and hold the DISPLAY button. Turn the rotary switch to the SET V
position. Hold the DISPLAY button until PI_1 appears in the display.
■
■To save changes, simply turn the switch.
■
59 min in 1 min steps.
■Press and hold the DISPLAY button. Then, turn the rotary switch to the SET
V position.
■
■To save changes, simply turn the switch.

18 Megohmmeter Model 6505
3.6 ADJUSTMENT OF THE VARIABLE TEST VOLTAGE
SET V VAR
SET V VAR
This function makes it possible to use test voltages
other than the 4 preset values of 500, 1000, 2500,
and 5000.
■Set the switch to SET V.
■
■
buttons.
■Set the switch to  to make the
measurement.
■This value will be retained in a non-volatile
memory.
M Ω 50-5000V
M Ω 50-5000V
3.7 ADJUSTMENT OF THE MAXIMUM TEST VOLTAGE
The user can set a maximum generated voltage to prevent any accidental over-
voltage tests from being conducted in error.
SET V LOCK
SET V LOCK
■Set the switch to SET V .
■

■Turn the switch to an insulation measurement
setting to make measurements.
■The maximum test voltage value will be retained
in a non-volatile memory. It will be displayed
󰀨
selected (e.g. if the maximum voltage is 750V,
it will be applied and displayed on all switch
settings from 1000V up).

Megohmmeter Model 6505 19
3.8 ERROR MESSAGES
0.1M
1M
10M
100M
1G
10G
100G
1T
V
■The insulation resistance is too low.
■Check your connections. The +and
-terminal of the instrument may be
short-circuited.
0.1M
1M
10M
100M
1G
10G
100G
1T
V
■The insulation resistance is outside
the measurement range.
■Check your connections. One of
the terminals of the instrument
may be disconnected, or the value
measured is > 4TΩ.
V AC
■The voltage present on the terminals
is greater than 25VAC or 35Vpeak.
■The instrument will alert you but
does not prevent making the
measurement.
V AC
■The voltage present on the terminals
is too high for a measurement to be
made:
peak V > 0.4 Un.
The test voltage, Un, is indicated by
the setting of the switch.
■Eliminate the voltage and restart the
measurement.
■Indicates that the protective fuse of
the Gterminal is defective.
■Replace the fuse as indicated in
§5.2.

20 Megohmmeter Model 6505
4. SPECIFICATIONS
4.1 REFERENCE CONDITIONS
 
Temperature 23 ± 3°C
Relative humidity 45 to 55% RH
Supply voltage 9 to 12V
Frequency range DC and 15.3 to 65Hz
Capacity in parallel on resistor 0µF
 nil
 < 40 A/m
4.2 VOLTAGE
Measurement
Range 1.0 to 99.9V 100 to 999V 1000 to 2500V 2501 to 5100V
Frequency
Range* DC and 15 to 500Hz DC
Resolution 0.1V 1V 2V 2V
Accuracy
1% of
Reading ±
5 cts
1% of Reading ± 3cts
Input
Impedance 
*Over 500Hz, the small display will indicate “- - - -”, and the main display will give
an assessment of the measured voltage’s peak value only.
4.3 INSULATION RESISTANCE
Method: Voltage-current method according to EN 61557-2 (ed. 02/97)

500, 1000, 2500, 5000VDC (or adjustable from 40 to 5100V)

10V from 40 to 1000V
100V from 1000 to 5100V
 >1mADC
 <1.6mA ± 5%
Load Current: 3mAdc approx when starting measurement
Max. Acceptable Voltage: Upeak = 0.4Un