ENGLISH
■
GROUND TESTER
6422
6424
User Manual
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 N.I.S.T. 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 #:
Model #: 6422 / 6424
Please fill in the appropriate date as indicated:
Date Received:
Date Calibration Due:
Chauvin Arnoux®, Inc.
d.b.a AEMC
®
Instruments
www.aemc.com
2 Ground Tester Models 6422/6424
CONTENTS
1. INTRODUCTION .................................................................................. 8
1.1. Battery Installation ......................................................................... 8
1.2. Battery Charging (Model 6424) .................................................... 10
1.3. Desktop Stand ............................................................................. 11
1.4. Instrument Interface ..................................................................... 11
1.5. Instrument Functions ................................................................... 13
1.6. Buttons and Keys ......................................................................... 13
1.7. LCD Display ................................................................................. 15
2. OPERATION ............................................................................... 16
2.1. Voltage Measurement .................................................................. 16
2.2. Resistance Measurement (2P) .................................................... 17
2.3. Grounding Resistance Measurement (3P) ................................... 20
2.4. AC Current Measurement (Model 6424) ...................................... 30
3. SPECIFICATIONS ...................................................................... 32
3.1. General Reference Conditions ..................................................... 32
3.2. Electrical Specifications ............................................................... 32
3.3. Influences ..................................................................................... 24
3.4. Uncertainty ................................................................................... 36
3.5. Environmental Conditions ............................................................ 37
3.6. Power Supply ............................................................................... 37
3.7. Mechanical Specifications ............................................................ 38
3.8. International Standards ................................................................ 38
3.9. Electromagnetic Compatibility (CEM) .......................................... 38
4. MAINTENANCE ......................................................................... 39
4.1. Cleaning ....................................................................................... 39
4.2. Replacing the batteries ................................................................ 39
REPAIR AND CALIBRATION .............................................................. 40
TECHNICAL AND SALES ASSISTANCE ............................................. 40
LIMITED WARRANTY ........................................................................ 41
Ground Tester Models 6422/6424 3
Thank you for purchasing the AEMC Ground Tester Model 6422 or 6424. For
best results from your instrument and for your safety, read the enclosed
operating instructions carefully and comply with the precautions for use. These
products must be only used by qualified and trained users.
WARNING, risk of DANGER! The operator must refer to these
instructions whenever this danger symbol appears.
CAUTION! Risk of electric shock. The voltage at the parts marked
with this symbol may be dangerous.
Useful information or tip.
Earth/ground.
Current clamp.
The product is declared recyclable following a life cycle analysis in
accordance with standard ISO 14040.
Battery.
Guarantees conformity with European directives and with
regulations covering EMC.
In the European Union, the product must undergo selective disposal
for the recycling of electric and electronic material, in compliance with
Directive WEEE 2002/96/EC.
4 Ground Tester Models 6422/6424
Precautions
This instrument is compliant with safety standard IEC 61010-2-030 for voltages
up to 600V in category IV. Do not use the instrument for measurements on
circuits that are not in measurement categories II, III, or IV or that might be
connected inadvertently to circuits that are not in measurement categories II, III,
or IV.
The operator and/or the responsible authority must carefully read and
clearly understand the various precautions to be taken in use. Sound
knowledge and a keen awareness of electrical hazards are essential
when using this instrument.
If you use this instrument other than as specified, the protection it
provides may be compromised, thereby endangering you.
Do not use the instrument on networks of which the voltage or category
exceeds those mentioned.
Do not use the instrument if it seems to be damaged, incomplete, or
poorly closed.
Before each use, check the condition of the insulation on the leads,
housing, and accessories. Any item of which the insulation is
deteriorated (even partially) must be set aside for repair or scrapping.
Before using your instrument, check that it is perfectly dry. If it is wet, it
must be thoroughly dried before it can be connected or used.
The use of leads (or accessories) of a lower voltage or category limits the
voltage or category of the combined instrument and leads (or
accessories) to that of the leads (or accessories).
Use personal protection equipment systematically.
When handling the leads, test probes, and alligator clips, keep your
fingers behind the physical guard.
All troubleshooting and metrological checks must be performed by
competent and accredited personnel.
Definition of Measurement Categories (CAT)
CAT IV Measurement category IV corresponds to measurements taken at the
source of low-voltage installations.
Example: power feeders, counters and protection devices.
CAT III Measurement category III corresponds to measurements on building
installations.
Example: distribution panel, circuit-breakers, machines or fixed
industrial devices.
CAT II Measurement category II corresponds to measurements taken
on circuits directly connected to low-voltage installations.
Example: power supply to domestic electrical appliances and
portable tools.
Ground Tester Models 6422/6424 5
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. Save the
damaged packing container to substantiate your claim.
Ordering Information
Ground Tester Model 6422…………………..…….……............... Cat. #2135.55
Includes 6 AA alkaline batteries, carrying bag and user manual
Ground Tester Model 6422 Kit-150 ft …………………..….......... Cat. #2135.56
Includes ground tester, two 150 ft color-coded leads on spools (red/blue),
one 30 ft lead (green), two T-shaped auxiliary ground electrodes, set of two
5 ft color-coded (red/blue) leads, one 100 ft AEMC® tape measure, 6 AA
batteries, carrying bag and user manual
Ground Tester Model 6424…………………..…….……............... Cat. #2135.57
Includes 6 AA rechargeable NiMH batteries, USB to wall charger, 5V, 2A,
USB charger cable, carrying bag and user manual
Ground Tester Model 6424 Kit-150 ft …………………..….......... Cat. #2135.58
Includes ground tester, two 150 ft color-coded leads on spools (red/blue), one
30 ft lead (green), two T-shaped auxiliary ground electrodes, set of two 5 ft
color-coded (red/blue) leads, one 100 ft AEMC
rechargeable NiMH batteries, USB to wall charger, 5V, 2A, USB charger
cable, carrying bag and user manual
®
tape measure, 6 AA
Ground Tester Model 6424 Kit-300 ft …………………..….......... Cat. #2135.59
Includes ground tester, two 300 ft color-coded leads on spools (red/blue), two
100 ft color-coded leads (hand-tied, green/black), four T-shaped auxiliary
ground electrodes, set of two 5 ft color-coded (red/blue) leads, one 100 ft
®
AEMC
charger, 5V, 2A, USB charger cable, carrying bag and user manual
tape measure, 6 AA rechargeable NiMH batteries, USB to wall
Accessories
Ground Rod – Set of 2, 17” stainless steel T-shaped
auxiliary rods ………………..……………………………….......... Cat. #2135.44
AC Current Probe Model MN72 for use with Model 6424 only... Cat. #2153.06
Calibration checker for ground tester
models 6422/6424…….… Cat. #5000.92
6 Ground Tester Models 6422/6424
Replacement Parts
Bag – Multi-purpose large canvas bag
(replacement for ground kits) …………..………..…….….......... Cat. #2119.82
Case – Replacement carrying case for Models 3620, 3640,
4600, 4610, AN1, 6422, 6424, 6501 & 6503…………….……... Cat. #2126.71
Tape measure – AEMC
Test Kit for 3-Point Testing ………………………………….…..… Cat. #2135.35
Includes two 150 ft color-coded leads on spools (red/blue), one 30 ft lead
(green), two T-shaped auxiliary ground electrodes, set of two 5 ft colorcoded (red/blue) leads, one 100 ft AEMC
Ground Rod – Set of 2, 14.5” T-shaped auxiliary rods …..…..… Cat. #2135.39
Cable – Replacement USB charger cable w/wall plug
for Model 6424 ……………………………………………….…..… Cat. #2135.93
®
100 ft ………………………….……..… Cat. #2130.60
®
tape measure, and carrying bag
Ground Tester Models 6422/6424 7
1. INTRODUCTION
1.1 Battery Installation
1. Open the battery compartment cover.
2. With your fingers on either side of the cover, insert a tool (for example a
screwdriver) in the latching system, and lift up.
3. Remove the battery compartment cover.
8 Ground Tester Models 6422/6424
4. Pull open the rubber seal covering the battery compartment.
5. Insert the batteries, ensuring correct polarities. We recommend
disposable batteries for the Model 6422 (for example alkaline) and
rechargeable batteries for the Model 6424. The Model 6422 comes with
alkaline batteries installed, and the Model 6424 with rechargeable
batteries installed.
6. Press the rubber seal back in place, ensuring it correctly covers the
compartment.
7. Replace the battery compartment cover.
If you insert disposable batteries in the Model 6424, the batteries will
last longer but the battery level indicator will be inaccurate.
If you insert rechargeable batteries in the Model 6422, the battery level
indicator will always display low battery level and the batteries
will not last as long.
Ground Tester Models 6422/6424 9
1.2 Battery Charging (Model 6424)
Before using the Model 6424 for the first time, you should fully charge the
battery. Charging must be done in a location with the temperature between 32
and 104°F (0 and 40°C).
Do not perform the charging procedure if disposable batteries are
installed in the instrument.
1. Connect one end of the provided USB cable to the Model 6424 terminal
block and the other end to a wall outlet using the provided externalpower-to-USB adapter.
2. The instrument displays CHrG. While the battery charges, the battery
level indicator displays progress. Full charging requires approximately 6
hours.
3. When the battery level indicator shows full charge disconnect the
USB cable from the instrument.
10 Ground Tester Models 6422/6424
1.3 Desktop Stand
Terminal block:
Hazardous
Backlit LCD display
TEST button
ON/OFF button
The instrument is equipped with two back supports that enable desktop operation
from an angled position. Pull the supports out to lock them in place, then place
the instrument on a flat surface.
1.4 Instrument Interface
1.4.1 Model 6422
3 measurement
terminals
voltage indicator
Ground Tester Models 6422/6424 11
1.4.2 Model 6424
Terminal block
Battery charger
input
MN72 AC Current Probe
Measurement terminals
Backlit LCD display
ON/OFF button
Function keys
TEST button
Connector for optional
Hazardous voltage indicator
Measurement data storage location
12 Ground Tester Models 6422/6424
1.5 Instrument Functions
terminals to C, P, X (§2.3.2).
The Models 6422 and 6424 are battery-powered portable measuring instruments
with LCD displays.
These instruments check the safety of electrical installations. They can be used
to test a new installation before it is powered up. They can also check an existing
installation (after it has been disconnected) or diagnose a malfunction in an
installation.
Function 6422 6424
Ground resistance measurement (with three rods)
Voltage measurement
Resistance measurement
Average of ground measurements at 52, 62, and 72%
RH over limit detection
RE over limit detection
Stray or foreign voltage on USE detection
AC current measurement with current clamp
(optional)
1.6 Buttons and Keys
Both models:
Buttons Function
Long press (>2 seconds) turns instrument ON.
Second long press turns instrument OFF.
Short press starts ground measurements in automatic mode
(§2.3.3).
Long press starts ground measurements in permanent mode.
TEST
+ TEST
Pressing TEST during a measurement stops the
measurement (§2.3.5).
At the end of the measurement, pressing TEST exits the frozen
measurement display.
Pressing and TEST simultaneously for >5 seconds while
turning ON the instrument changes the names of the H, S, E
Ground Tester Models 6422/6424 13
Model 6424 only:
Ke ys Function
V/A takes voltage measurements (§2.1), or current
V/A
Ω
measurements if a current probe is connected (§2.4).
In the latter case, a second press forces voltage
measurements.
Ω takes resistance measurements (§2.2).
Ω and TEST pressed simultaneously takes ground resistance
measurements (§2.3).
stores the displayed measurement with the S rod at 52%
of the distance (§2.3.4).
52%
0
62%
Pressing and then activates/deactivates lead
compensation.
Pressing and then for >2 seconds compensates the
resistance of the leads for the resistance measurement
(§2.2.2).
stores the displayed measurement with the S rod at 62%
of the distance (§2.3).
Pressing and then turns on backlighting for one
minute, or turns backlighting off.
stores the displayed measurement with the S rod at 72%
72%
CLR
of the distance (§2.3.4).
Pressing and then deactivates the Auto Off feature.
activates the “second” functions of the 52%, 62%, and
72% keys (§2.3).
Pressing for >2 seconds erases the values stored in
memory.
14 Ground Tester Models 6422/6424
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