AEMC 6418 User Manual

ENGLISH

User Manual

■

GROUND TESTER

6418

2 Clamp-On Ground Tester Model 6418

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 #: 2141.03

Model #: 6418

Please fill in the appropriate date as indicated:

Date Received:

Date Calibration Due:

Chauvin Arnoux®, Inc.
d.b.a AEMC

®

Instruments

www.aemc.com

Clamp-On Ground Tester Model 6418 3

Table of Contents

PRECAUTIONS FOR USE ..................................................... 5

1. I

NTRODUCTION ................................................................... 7

1.1. Function Keys .................................................................. 8

1.2. Display ............................................................................. 8

1.3. Inserting Batteries ............................................................ 9

1.4. Date and Time Setup ....................................................... 9

2. OPERATION .................................................................... 10

2.1. General .......................................................................... 10

2.2. Impedance and Current Measurement .......................... 10

2.3. Current Measurement .................................................... 12

2.4. Configuring (Set-up) ....................................................... 13

2.5. Errors ............................................................................. 15

2.6. Automatic Stop .............................................................. 15

2.7. Storage .......................................................................... 16

3. TECHNICAL CHARACTERISTICS ................................. 18

3.1. General Reference Conditions ...................................... 18

3.2. Electrical Characteristics ............................................... 18

3.3. Influences ...................................................................... 19

3.4. Power Supply................................................................. 22

3.5. Environmental Conditions .............................................. 22

3.6. Mechanical Characteristics ............................................ 22

3.7. Compliance with International Standards ...................... 23

3.8. Electromagnetic Compatibility (EMC) ............................ 23

4. MAINTENANCE ............................................................. 24

4.1. Cleaning ......................................................................... 24

4.2. Battery Replacement ..................................................... 24

LIMITED WARRANTY .......................................................... 26

4 Clamp-On Ground Tester Model 6418

Thank you for purchasing the AEMC Clamp-On Ground Tester Model

6418.

F

or 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.

Equipment is protected by double insulation.

Battery.

Application or withdrawal authorized on conductors carrying

dangerous voltages. Type A current sensor per IEC 61010-2-

032.

U

seful information or tip to read.

The product has been declared recyclable after analysis of its

life cycle in accordance with the ISO14040 standard.

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.

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.

Clamp-On Ground Tester Model 6418 5

PRECAUTIONS FOR USE

This instrument is compliant with safety standard IEC 61010-2-032, for
voltages up to 100V in category IV or 150V in category III. Failure to
observe the safety instructions may result in electric shock, fire,
explosion, and destruction of the instrument and of the installations.

 The operator and/or the responsible authority must carefully read an

d

c

learly understand the various precautions to be taken in use. T

he

oper

ator and/or the responsible authority must carefully read an

d

c

learly understand the various precautions to be taken in use. Sou

nd

k

nowledge 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.

 The safety of any system in which this instrument might

be

i

ncorporated is the responsibility of the integrator of the system.

 Do not use the clamp above its rated frequency, since this might

cause it to overheat dangerously.

 Do not use the instrument on networks of which the voltage or

category exceeds those mentioned.

 Observe the environmental conditions of use.

 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 housing.

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.

 When handling the instrument, keep your fingers behind the physical

guard.

 Avoid impacts on the measurement head, in particular the air gap.

 Keep the surfaces of the air gap clean; even a little dirt can cause the

clamp to malfunction.

 Use personal protection equipment systematically.

 All troubleshooting and metrological checks must be done by

competent accredited personnel.

6 Clamp-On Ground Tester Model 6418

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

Clamp-On Ground Tester Model 6418 .............................. Cat. #2141.03

Includes hard carrying case, 5

Ω

calibration loop, four 1.5V AA batteries,
wrist strap, Bluetooth adapter, multilingual safety sheet, Quick Start
Guide, and USB drive containing User Manual.

Replacement Parts

Hard Carrying Case .......................................................... Cat. #2141.52

5 Ω Calibration Loop ......................................................... Cat. #2141.51

F

or the accessories and replacement parts, visit our web site:

www.aemc.com

Clamp-On Ground Tester Model 6418 7

1. INTRODUCTION

The simple-to-use Clamp-On Ground Tester Model 6418 makes ground
impedance measurements in a parallel earth network, such as power
distribution poles and overhead ground conductors. These
measurements are simpler to perform than traditional measurements
with two auxiliary rods.

The Model 6418 can make accurate low value ground impedances
measurements and AC current measurements. Its large oblong
measurement head can clamp around bars up to 1.18 x 1.57” (30 x
40mm). Its memory function records measurements for later viewing.
The instrument’s OLED (Organic Light Emitting Diode) display screen is
easy to read, even in direct sunlight.

8 Clamp-On Ground Tester Model 6418

1.1. FUNCTION KEYS

As a general rule, functions shown in white on the keys are available
when the switch is set to Ω+A or A. The yellow arrow keys (▲, ▼ and

►) are available when the switch is set to MR or SET-UP.

Key Function

Switch the display unit backlighting ON and OFF.

MEM

Record the measurement displayed.

HOLD

Freeze/unfreeze the display of the measurement.

▲

▼

Browse in:

 SET-UP menu and change the value of the parameter

selected.

 Memory read (MR).

►

When switch is set to:

 Ω+A or A: a long press on ► activates/deactivates the

audible signal.

 SET-UP: ► browses in the menu and confirms the changes

made.

 MR: ► toggles the display between the measurement and

the date/time.

1

.2. DISPLAY

When the measurement exceeds the limits of the measurement range,
the instrument displays OR.

Clamp-On Ground Tester Model 6418 9

1.3. INSERTING BATTERIES

Refer to §4.2.

1.4. DATE AND TIME SETUP

The first time you turn ON the instrument by turning the switch to Ω+A,
the instrument prompts you to set the date.

The year blinks, indicating it can

be edited. Set it using the ▲ and
▼ keys

.

Then press the ► key; the month

blinks. Set it using ▲ and ▼.

P

ress ►. The date blinks; set it

using ▲ and ▼ and confirm by
pressing ►.

The instrument then displays the
time format. Choose 24h or 12h (A

or P) using ▲ and ▼.

Confirm by pressing ►. The

hours reading blinks. Set it

using ▲ and ▼ and confirm
by pressing ►.

The minutes reading blinks. Set

it using ▲ and ▼ and confirm
with ►.

10 Clamp-On Ground Tester Model 6418

2. OPERATION

2.1. GENERAL

When turned ON, the instrument performs self-calibration. The jaws of
the clamp must therefore be closed and not clamped around any
conductor.

If the instrument fails to complete self-calibration, the error message Err.
CAL is displayed. If this happens, turn the instrument OFF and ensure
the air gaps are clean. Then turn the instrument ON.

2.2. IMPEDANCE AND CURRENT MEASUREMENT

Set the
switch to
Ω+A.

Press the trigger to open the jaws,
and clamp around the conductor
that is part of the ground system
to be measured.

When the jaws are open, the
symbol

is displayed and the

instrument cannot make a
measurement.

Clamp-On Ground Tester Model 6418 11

2.2.1. CONNECTION

The ground electrode to be measured (RX) is in a series/parallel
arrangement with other ground electrodes via the earth impedance (Z

E

)

and physical connection to other resistance paths (Z

S

). The measured

impedance will be slightly greater than R

X

assuming the downstream

impedance is very low. For example: If R

X

is 21Ω and ZS/R1-Rn is

effectively 0.6Ω, the Model 6418 will read 21.6Ω.

During the impedance measurement, the instrument emits an

intermittent audible “beeping” signal. This is caused by the
measurement frequency that flows in the measurement head.
The sound can vary as a function of the frequency and amplitude
of the current measured. This sound is normal and cannot be

eliminated.

2.2.2. FREEZING AND/OR STORING A MEASUREMENT

When the measurement has stabilized, you can press the HOLD key to
freeze it and/or MEM to record it.

12 Clamp-On Ground Tester Model 6418

2.2.3. AUTO-HOLD FUNCTION

The AUTO-HOLD function (see §2.4), freezes the measurement
automatically when the jaws of the clamp are opened. This can be useful
when you have only one hand free to make a measurement.

2.2.4 ALARMS

To facilitate making measurements, you can program an alarm on the
impedance measurement (see §2.4) and/or the current measurement
(see §2.4). You can then be aware whether the measurement is
acceptable without looking at the display.

The alarm indicator on the display
blinks and the instrument emits a
continuous audible signal.

To eliminate the audible signal, press

and hold the ► key.

I

f you set alarms on both the
impedance and the current, and both
alarm thresholds are exceeded, the
alarm on the current has priority.

2.3. CURRENT MEASUREMENT

The current measurement alone is identical to the current measurement
with the impedance measurement.

Set the switch to
A.

Press the trigger to open the jaws of the clamp and
clamp the conductor in which the current to be

measured flows.

Clamp-On Ground Tester Model 6418 13

When the measurement has stabilized, you can press the HOLD key to
freeze it and/or MEM to record it in memory. You can also use the
AUTO-HOLD function (see §2.4) to freeze the measurement
automatically when the clamp jaws are opened. This can be useful when
you have only one hand free to make a measurement. To facilitate
making measurements, you can configure an alarm on the current
measurement value (see §2.4).

2.

4. CONFIGURATION (SET-UP)

Set the switch to SET-UP.

Use the ▼ and ▲ keys to scroll through the screens of the SET-UP
menu.

CLR (erase memory) menu.

Press the ► key to enter the CLR menu.
To cancel, press ►.
To erase all records, press and hold the ▲ and ▼ keys

simultaneously. The instrument emits 5 audible beeps before
erasing the memory.

SND menu (activation of the sound).

Press ► to enter the SND menu. Use ▲ and ▼ to display or

hide the symbol.
When is displayed, the instrument emits an audible
signal when keys are pressed and when alarm thresholds are
crossed.
Confirm by pressing ►.

During the measurements (when the switch is set to Ω+A or

A), a long press on ► activates/deactivates the audible

signal.

STOP menu (automatic standby).

Press ► to enter the STOP menu. Use ▲ and ▼ to display

or hide the symbol (permanent operation).

When is displayed, automatic switching of the instrument to

standby at the end of 5 minutes is disabled. Confirm by
pressing ►.

ALΩ menu (impedance alarm).

Press ► to enter the ALΩ menu. Use ▲ and ▼ to scroll

through the display:

: no impedance alarm.
: impedance alarm activates when impedance >10Ω.

: impedance alarm activates when impedance <10Ω.

Press ►; the alarm threshold blinks. Set it using ▲ and ▼.
Acceptable values are between 1 and 199Ω. A long press

scrolls the values faster.

Confirm by pressing ►.

14 Clamp-On Ground Tester Model 6418

AL A menu (current alarm).

Press ► to enter the AL A menu. Use ▲ and ▼ to scroll
through the display:

: no current measurement alarm.

: current alarm activates when current >30mA.

Press ►; the alarm threshold blink. Set it using ▲ and ▼.

Acceptable values are between 1mA and 20.0A. A long press
scrolls the values faster.
Press ► to confirm.

DATE menu (setting of the date)

Press ► to enter the DATE menu. Use ▲ and ▼ to set the
year. Press ►; the month setting blinks. Set it using ▲ and
▼.

Do the same for the day setting and confirm with the ► key.
For a more detailed procedure, see §1.4.

HOUR menu (setting of the time)

Press ► to enter the HOUR menu. Use ▲ and ▼to choose

24h or 12h (A or P) form. Press ►; the hours setting blinks.
Set this using ▲ and ▼. Press ►; the minutes setting blinks.
Set this using ▲ and ▼; confirm by pressing ►.
For a more detailed procedure, see §1.4.

HOLD menu (activation of the AUTO-HOLD function)

Press ► to enter the AUTO-HOLD menu. Use ▲ and ▼ to display
or hide the symbol. When this symbol is displayed, the
AUTO-HOLD function is activated. In this mode, when the
measurement is stable, it is frozen when the clamp is opened.

Confirm by pressing ►.

VER menu (display of the software version)

Press ► to display the software version number.
Press ▼ to display the instrument serial number.

CAL menu (not used)

Clamp-On Ground Tester Model 6418 15

2.5. ERRORS

During the measurement, the instrument reports any errors.

Display of the NOISE symbol during the impedance

measurement indicates that the current (>5A) or voltage
(ZxI> 25V) is too high, making the accuracy of the
displayed measurement uncertain.

When the current exceeds 10A, the impedance

measurement is not displayed (dashes appear in the
measurement field).

When the impedance measurement is >1200Ω, the

instrument displays OR.

When the current measurement is >20A, the

instrument so indicates.

When the impedance measurement is <1Ω, the display

alternately indicates the measured value and LOOP,
indicating the value is very low for a valid ground
impedance measurement and most likely indicates the
measurement is through a wire loop rather than through
the earth.

2.6. AUTOMATIC STOP

After 5 minutes of inactivity, the instrument enters to standby mode.
Press any key or turn the switch to any setting to exit standby. The
instrument restarts without repeating the calibration procedure if it has not
been on standby for more than 15 minutes. It is possible to disable
automatic standby; refer to §2.4 (STOP menu). The symbol is then
displayed.

16 Clamp-On Ground Tester Model 6418

2.7. STORAGE

2.7.1. RECORDING A MEASUREMENT

To record a measurement, press the MEM key.

You can first press the HOLD key to freeze the measurement.

To record a measurement, the batteries must not be

discharged (the symbol must not be displayed).

The measurement is

recorded in the memory slot
of which the number is
displayed (in this example,
slot number 2).

I

t is recorded with all

accompanying information:

 date and time
 any alarms and their

status (triggered or not)

 any errors (NOISE, OR,

LOOP)

 ancillary displays (HOLD,

)

2.7.2. VIEWING RECORDINGS

Set the

switch to MR.

The instrument displays the last measurement
recorded. Press ► to display the date and time.

U

se ▲ and ▼ to scroll through all of the recorded measurements.

Clamp-On Ground Tester Model 6418 17

2.7.3. ERASING ALL RECORDINGS

Set the switch to SET-UP.,

then follow the procedure
described in

§2.4 in the CLR

menu.

When you return to the MR
setting, the instrument
indicates that the memory is

empty.

2.

7.4. MEMORY FULL

You can record up to 300 measurements (numbered from 0 to 299).

If yo

u continue recording, measurement number 300 overwrites
measurement number 0, measurement 301 overwrites measurement 1,
and so on.

The instrument reports this by alternately displaying FULL and the
memory slot number.

Y

ou can continue in this way up to number 9999, at which point
recording becomes disabled and you must erase the memory to be able
to resume recording.

18 Clamp-On Ground Tester Model 6418

3. TECHNICAL CHARACTERISTICS

3.1. GENERAL REFERENCE CONDITIONS

Quantities of influence

Reference values

Temperature

73 ±5°F (23 ±3°C)

Relative humidity

50 ±10%RH

Supply voltage

6 ±0.2V

Electric field

<1V/m

Magnetic field

<40A/m

Operating position

clamp horizontal

Position of the conductor in the jaws

centered

Adjacent conductors carrying current in
impedance measurement

At least 3.9” (10cm)

Magnetic mass

At least 3.9” (10cm)

Frequency

50Hz, sinusoidal

Level of distortion

<0.5%

Current present in impedance measurement

0mA

The intrinsic uncertainty is the error defined under the conditions of
reference.

The operational uncertainty is the intrinsic uncertainty plus the
variation of the quantities of influence (position, supply voltage,
temperature) as defined in standard IEC 61557. The uncertainties are
expressed as a percentage of the reading (R) and as a number of
display counts (ct): ±(a%R+# ct).

3.2. ELECTRICAL CHARACTERISTICS

3.2.1. IMPEDANCE MEASUREMENTS
Particular conditions of reference

Inductance in series with the resistance: zero.

Specified
measurement

range

0.010 to

0.099Ω

0.10 to

0.99Ω

1.0 to

49.9Ω

50 to

149Ω

Resolution (ct) 1 mΩ 10 mΩ 100 mΩ 1 Ω

Intrinsic
uncertainty (δ)

± (1.5%R +

0.01Ω)

± (1.5%R + 2

ct)

± (1.5%R +

2 ct)

± (2.5%

R +

2 ct)

No-load voltage ≤ 45 mV to 2083 Hz

Clamp-On Ground Tester Model 6418 19

Specified
measurement

range

150 to

245Ω

250 to 440Ω 450 to

640Ω

650 to

1200Ω

Resolution (ct) 5 Ω 10 Ω 10 Ω 50 Ω

Intrinsic
uncertainty (δ)

± (5%R +

2 ct)

± (10%R +

2 ct)

± (15%R +

2 ct)

± (20%R

+ 2 ct)

No-load voltage ≤ 45 mV to 2083 Hz

3.2.2 CURRENT MEASUREMENTS
Particular conditions of reference

Frequency of the signal 47 to 800Hz

Specified
measurement

range

0.500 to

9.950mA

10.00 to

99.90mA

100.0 to

299.0mA

0.300 to

2.990A

Resolution (ct)

50 µA

100 µA

1 mA

10 mA

Intrinsic
uncertainty (δ)

± (2%R +

200 µA)

± (2%R + 1 ct)

± (2%R +

1 ct)

± (2%R +

1 ct)

Specified measurement range 3.00 to 20.00 A

Resolution (ct)

100 mA

Intrinsic uncertainty (δ)

± (2%R + 1 ct)

Beyond 20A and 800Hz, the clamp may overheat dangerously.

3.2.3. STORAGE

Number of records: 300.

3.

3. INFLUENCES

Z = impedance
I = current

δ = intrinsic uncertainty given in §3.2.
ct = resolution given in §3.2.

20 Clamp-On Ground Tester Model 6418

Impedance measurement:

Quantities of

influence

Range of
influence

Influence

Typical

Maximum

Temperature

-4 to 131°F (-20 to
+ 55 °C)

0.5 δ / 10°C ± ct 1.5 δ / 10°C + ct

Relative
humidity

10 to 90% RH

1 δ ± ct 2 δ ± ct

Supply
voltage

4 to 6.5 V

0.05 δ ± ct 0.1 δ ± ct

Position of
conductor

from the edge to

the center

Z < 450 Ω

0.2 δ ± ct

Z ≥ 450 Ω

0.5 δ ± ct

Z < 450 Ω

0.4 δ ± ct

Z ≥ 450 Ω

1 δ ± ct

Position of
clamp

+/- 180°

Z < 450 Ω

0.25 δ ± ct

Z ≥ 450 Ω

0.5 δ ± ct

Z < 450 Ω

0.5 δ ± ct

Z ≥ 450 Ω

1 δ ± ct

Proximity to

magnetic

mass

Sheet steel

1mm thick

against air gap

0.1 δ ± ct 0.5 δ ± ct

Magnetic field
50/60Hz

30 A/m

0.05 δ ± ct 0.1 δ ± ct

Adjacent
conductor

I < 40A

Z < 250 Ω

0.25 δ ± ct

Z ≥ 250 Ω

0.4 δ ± ct

Z < 250 Ω

0.5 δ ± ct

Z ≥ 250 Ω

0.8 δ ± ct

Leakage
current in the
grounding
system from
50 to 60Hz
I <10 A. ZxI
<75 V

Z <

100 Ω

Z x I <

20 V

0.5 δ ± ct 1 δ ± ct

20 V ≤ Z x

I < 40 V

1 δ ± ct 3 δ ± ct

40 V ≤

Z x I

2 δ ± ct 4 δ ± ct

Z ≥ 100 Ω

0.5 δ ± ct

1 δ ± ct

Ground
inductance

0 to 500 µH

Instrument displays Z at measurement frequency

(2083Hz)

Clamp-On Ground Tester Model 6418 21

Current measurement:

Quantities of

influence

Range of influence

Influence

Typic

al

Maxim

um

Temperature

-4 to 131 °F (-20 to +
55 °C)

0.5 δ / 10°C ± ct 1.5 δ / 10°C + ct

Relative
humidity

10 to 90% RH

0.5 δ ± ct 1 δ ± ct

Supply voltage 4 to 6.5 V

0.05 δ ± ct 0.1 δ ± ct

Position of
conductor

from the edge to the

center

0.05 δ ± ct 0.2 δ ± ct

Position of
clamp

+/- 180°

0.1 δ ± ct 0.25 δ ± ct

Proximity to
magnetic mass

Steel sheet 1mm

thick against air

gap

0.1 δ ± ct 0.2 δ ± ct

Magnetic field
50/60Hz

10 A/m 0.75 mA 1.5 mA

30 A/m 2 mA 4.5 mA

100 A/m 8 mA 15 mA

Deformation of
the leakage
current

IEC 61557-13

5% to 150 Hz

at 0°

6% to 250 Hz

at 180°

5% to 350 Hz

at 0°

0.05 δ ± ct 0.1 δ ± ct

Adjacent
conductor

I < 40A > 70 dB > 66 dB

Frequency of
the leakage
current

47 to 800 Hz 1

0.5 δ ± ct 1 δ ± ct

1:

For the whole current measurement range

22 Clamp-On Ground Tester Model 6418

3.4. POWER SUPPLY

The instrument is powered by four 1.5V AA batteries (LR6 alkaline; NiMH
rechargeable can also be used). The voltage range ensuring proper
operation is 4 to 6.5V. The battery life of the instrument is 12 hours
(approximately 1440 30-second measurements).

3.

5. ENVIRONMENTAL CONDITIONS

The conditions of ambient temperature and relative humidity are
illustrated in the following graph:

%RH

1 = Domain of reference

2 = Domain of use
3 = Domain of storage
without batteries.

Indoor use

Altitude <6500’ (<2000m)

Pollution degree 2

3.6. MECHANICAL CHARACTERISTICS

Dimensions (L x W x H): 11.8 x 4.2 x 2.2” (300 x 106 x 56mm)
Weight: approximately 2.6 lb (1.2kg)
Clamping diameter: 1.26” (32mm) or a 1.18 x 1.57” (30 x 40mm) or 0.79

x 2.17” (20 x 55mm) bar

Ingress protection: IP40 per IEC 60529

Clamp-On Ground Tester Model 6418 23

3.7. COMPLIANCE WITH INTERNATIONAL STANDARDS

The instrument is compliant with standard IEC 61010-1 and IEC 61010­2-032, 100V category IV or 150V category III.

3.8. ELECTROMAGNETIC COMPATIBILITY (EMC)

The instrument is compliant with standard IEC 61326-1.

24 Clamp-On Ground Tester Model 6418

4. MAINTENANCE

Except for batteries, the instrument contains no parts

replaceable by personnel who are not specially trained and
accredited. Any unauthorized repair or replacement of a
part by an “equivalent” may gravely impair safety.

4.1. CLEANING

Disconnect everything connected to the instrument and set the switch to
OFF. Use a soft cloth, dampened with soapy water. Rinse with a damp
cloth and dry rapidly with a dry cloth or forced air. Do not use alcohol,
solvents, or hydrocarbons. Do not use the instrument again until it has
completely dried. Keep the air gap of the clamp perfectly clean.

4.2. BATTERY REPLACEMENT

The symbol on the display screen blinks when batteries are low.

This symbol is displayed steadily when the batteries require

replacement.

1. Disconnect everything connected to the instrument and set th

e

s

witch to OFF.

2. Turn the instrument over and unscrew the 2 captive screws securing

the battery compartment cover.

Clamp-On Ground Tester Model 6418 25

3. Remove the battery compartment cover.

4. Remove the batteries from the compartment.

Spent batteries must not be treated as ordinary household
waste. Take them to the appropriate recycling collection

point.

5. I

nsert new batteries in the compartment, observing polarities.

6. Replace the battery compartment cover and ensure it is completely

and

co

rrectly closed.

7. Screw the two captive screws back in.

Instrument date and time settings are saved for several minutes,

long enough for you to change the batteries. If, however, the
date and time are lost, the instrument will prompt you to reset

them when it is turned ON (see §1.4).

26 Clamp-On Ground Tester Model 6418

LIMITED WARRANTY

Y

our AEMC instrument is warranted to the owner for a period of two
years 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

®

Instruments.
Full warranty coverage and product registration is available on our
website at:

w

ww.aemc.com/warranty.html.

Please print the online Warranty Coverage Information for your records.

W

hat AEMC

®

Instruments will do:

If a malfunction occurs within the two-year period, you may return the
instrument to us for repair, provided we have your warranty registration
information on file or a proof of purchase. AEMC

®

Instruments will, at its

option, repair or replace the faulty material.

WARRANTY REPAIRS

What you must do to return an Instrument for Warranty Repair:

F

irst, request a Customer Service Authorization Number (CSA#) by
phone or by fax from our Service Department (see address below), then
return the instrument along with the signed CSA Form. Please write the
CSA# on the outside of the shipping container. Return the instrument,
postage or shipment pre-paid to:

S

hip To: Chauvin Arnoux

®

, Inc. d.b.a. AEMC® Instruments
15 Faraday Drive • Dover, NH 03820 USA
Phone: [phone] (Ext. 360)

[phone] (Ext. 360)

Fax: [phone] • [phone]

E-m

ail: [e-mail]

C

aution: To protect yourself against in-transit loss, we recommend you

insure your returned material.

N

OTE: You must obtain a CSA# before returning any instrument.

Clamp-On Ground Tester Model 6418 27

NOTES:

04/19

99-MAN 100482 V2

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

15 Faraday Drive • Dover, NH 03820 USA

Phone: [phone] • Fax: [phone]

www.aemc.com