Atec AEMC-4620, AEMC-4630 User Manual

Models 4620 & 4630 (pdf) 08/02

Technical Assistance [phone] www.aemc.com 1 of 6

Digital Ground Resistance Tester
Models 4620 and 4630 perform ground
resistance and soil resistivity tests.
These direct reading testers measure
from 0 to 2000Ω, and are auto­ranging, so they automatically seek out
the optimum measurement range.
Easy-to-use — simply connect the
leads, Press-to-Measure and read
the results.

The large LCD (nearly

3

/4" high
characters) is easy-to-read, and also
indicates low battery status, overrange
and test lead shorts and lead reversals.
Three LED indicators on the front panel
continuously warn the user of
measurement problems to ensure
accurate and reliable tests.

The Models 4620 and 4630 are fuse
protected up to >250V

AC against

accidental connection to live circuits.
In the event of a system fault, they can
withstand 250V

AC with spikes of

3000V

AC or 1000VDC.

The heavy-duty field case is sealed
against dust and water when closed.
The meter itself is self-contained within
an inner case providing additional
environmental and insulation protection.
The test button is also sealed against
the elements.

The Model 4620 is powered by eight,
C cell batteries.

The Model 4630 is powered by 9.6V,

3.5 Ah NiMH rechargeable batteries. A
built-in recharge circuit, powered from
120/230V 50/60Hz line, also provides
for testing while recharging.

Both models will perform over 2000
15 second tests between recharging
(Model 4630) or battery replacement
(Model 4620).

The Ground Resistance Tester
Models 4620 and 4630 are rugged,
easy-to-use instruments ideal for
maintenance crews performing
numerous tests. Both models exceed
mechanical and safety specifications
for shock, vibration and drop tests
called out in IEC standards. They are
designed to reject high levels of inter­ference, so they can be used under
difficult conditions such as high stray
currents that normally affect accuracy.

Digital Ground Resistance Tester
Models 4620 & 4630

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Features

• Measures soil resistivity (4-Point)

method

• Measures ground resistance (2- and

3-Point) Fall-of-Potential method

• Step voltage tests and touch

potential measurements

• Auto-Ranging: automatically selects

the optimum range

• Designed to reject high levels of

noise and interference

• Extremely simple to operate:

connect – press – read

• LED on faceplate informs operator of

high input noise, high auxiliary rod
resistance and fault connections

• Large easy-to-read backlit display

• Battery powered (Model 4620)

• AC powered with rechargeable

NiMH batteries (Model 4630)

• Rugged dustproof and rainproof

field case

• Can also be used for continuity

tests on bonding

• Color-coded terminals

Applications

• Three-Point measurements of

resistance to ground of ground
rods and grids. Three-Point mea-

surements are generally used when
the electrode or grid can be easily
disconnected, if corrosion is
suspected, or in circumstances where
ground faults are unlikely to occur.

• Four-Point tests or soil resistivity

measurements. Locating areas of
lowest soil resistivity is essential for
achieving an economical grounding
installation.

• Touch potential measurements, an

alternative to 3-Point tests in
evaluating electrical safety. This

test is recommended when the ground
cannot be disconnected, where
ground faults are highly likely to
occur, or when the “footprint” of
grounded equipment (the outline of
the part of equipment in contact with
the earth) is comparable to the size
of the ground to be tested.

• Two-Point tests for continuity tests

on bonding or on pre-established
grounds. This test is commonly

performed in urban environments
where proper auxiliary electrode
placement may be obscured by
confined real estate. Measurements
are referenced against a good local
ground conductor.

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Specifications

MODELS 4620 4630

ELECTRICAL

Ranges (Auto-Ranging 0 to 2000Ω)20Ω 200Ω 2000Ω
Measurement 0.00 to 19.99Ω 20.0 to 199.9Ω 200 to 1999Ω
Resolution 10mΩ 100mΩ 1Ω
Open Voltage ≤42V peak ≤42V peak ≤42V peak
Resistance Measurement

128Hz square wave 128Hz square wave 128Hz square wave

Frequency
Test Current 10mA 1mA 0.1mA
Accuracy ±2% of Reading ± 1ct ±2% of Reading ± 1ct ±2% of Reading ± 3cts
Auxiliary Electrode Influence

Max Res. in Current Circuit 3kΩ 30kΩ 50kΩ
Max Res. in Voltage Circuit 2000Ω 50kΩ 50kΩ

Interference Rejects high levels of interference voltage (DC, 50 to 60Hz, harmonics):

DC voltage in series with X: 20V; AC voltage in series with Y: 13V peak;

AC voltage in series with Z: 32V peak

Response Time Approximately 4 to 8 seconds for a stabilized measurement
Withstanding Voltage 250VAC or 100VDC
Power Source Eight C cell batteries; 120/230V 50/600Hz

Alkaline recommended; Rechargeable 9.6V, 3.5 Ah NiMH batteries

Battery Life 1800 15-second measurements; LO BAT indication on LCD
Fuse Protection 0.1A, >250V, 0.25 x 1.25"; 30kA Interrupt Capacity

MECHANICAL

Display 3

1

/2 digit, 0.71" (18mm) high; 2000-counts; electroluminescent blue backlight

LCD also indicates overrange, test lead shorts and lead reversals

Connection Color-coded terminals accept spade lugs with min. gap of 6mm or

standard 4mm banana jacks

LED Indication Three LEDs indicate high input noise, high auxiliary rod resistance,

open leads, blown fuse

Operating Temperature 14° to 131°F (-10° to 55°C), 20 to 90% RH
Storage Temperature -40° to 158°F (-40° to 70°C), 10 to 90% RH with batteries removed
Dimensions 10.8 x 9.7 x 5.0" (273 x 247 x 127mm)
Weight 6.28 lbs (2.85kg) 7.38 lbs (3.35kg)
Case Heavy duty o-ring sealed field case
Mechanical Shock IEC 68-2-27
Vibration Test IEC 68-2-66
Drop Test IEC 68-2-32
Dielectric Test 3kV, 50/60Hz, 1 min. between four interconnected measuring terminals

and any external metal ground

Environmental O-ring sealed against dust and water to IP50 (Protection Index)

when case is closed

SAFETY

Rating EN 61010-1, Cat. III, Pollution Degree 2
CE Mark Yes

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Ground Resistance Tester Model 4630 Kit

includes meter, two 300 ft color-coded

leads on spools, two 100 ft color-coded

leads, four 16" auxiliary ground

electrodes, one 16 ft lead with Mueller

®

clip, carrying bag, one 100 ft tape

measure, one AC power cord,

ground workbook and user manual

Test Kit – 4-Point includes carrying bag, two 300 ft color-

coded leads on spools, two 100 ft color-coded leads, four

16" auxiliary ground electrodes, one 16 ft lead with

Mueller

®

clip and one 100 ft tape measure

Catalog #2130.63

Test Kit – 3-Point includes carrying bag,

two 150 ft color-coded leads on spools,

two 16" auxiliary ground electrodes, one 16 ft lead with

Mueller

®

clip and one 100 ft tape measure

Catalog #2130.62

Ground Test Kit – 3-Point (supplemental 4-Point) includes

carrying bag, two 100 ft color-coded leads,

one 16 ft lead and two 16" auxiliary ground electrodes

Catalog #2130.61

The Models 4620 and 4630 are

built into a double case.This extra

rugged construction provides

double insulation, maximum field

durability and ease of serviceability.

Accessories

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ORDERING INFORMATION CATALOG NO.

Ground Resistance Tester Model 4620 (4-Point, Digital, Battery Powered). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.43

Includes meter, eight C cell batteries and user manual

Ground Resistance Tester Model 4630 (4-Point, Digital, Rechargeable Battery). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.44

Includes meter, battery, AC Power cord and user manual

Ground Resistance Tester Model 4620 Kit (4-Point, Digital, Battery Powered) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.45

Includes meter, 8 C cell batteries, two 300 ft color-coded leads on spools, two 100 ft color-coded leads, four 16" auxiliary
ground electrodes, one 16 ft lead with Mueller

®

clip, carrying bag, one 100 ft tape measure, ground workbook and user manual

Ground Resistance Tester Model 4630 Kit (4-Point, Digital, Rechargeable Battery). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.46

Includes meter, two 300 ft color-coded leads on spools, two 100 ft color-coded leads, four 16" auxiliary ground electrodes,
one 16 ft lead with Mueller

®

clip, carrying bag, one 100 ft tape measure, one AC power cord, ground workbook and user manual

Accessories (Optional)

25Ω Calibration Checker (for Model 4620 and Model 4630). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.59

Tape Measure (100 ft). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.60

Ground T est Kit – 3-Point (supplemental 4-Point) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.61

Includes carrying bag, two 100 ft color-coded leads, one 16 ft lead and two 16" auxiliary ground electrodes

Test Kit – 3-Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.62

Includes carrying bag, two 150 ft color-coded leads on spools, two 16" auxiliary ground electrodes,
one 16 ft lead with Mueller

®

clip and one 100 ft tape measure

Test Kit –4-Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.63

Includes carrying bag, two 300 ft color-coded leads on spools, two 100 ft color-coded leads, four 16" auxiliary
ground electrodes, one 16 ft lead with Mueller

®

clip and one 100 ft tape measure

11

11. Low battery indicator

12. Display

13. Fuse holder

14. Test button

15. Xv-Y high noise indicator

16. Xv-Y high resistance indicator

17. X-Z fault indicator

18. Electrode terminal X (E)

19. Electrode terminal Xv (ES)

10. Electrode terminal Y (S)

11. Electrode terminal Z (H)

12. AC power input

1 2

10

9

8

7

3

4

5

6

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Technical Assistance [phone] www.aemc.com 6 of 6

Contact Us

United States & Canada:

Chauvin Arnoux

®

, Inc.

d.b.a. AEMC

®

Instruments
200 Foxborough Blvd.
Foxborough, MA 02035 USA
[phone] • Fax [phone]
www.aemc.com

Customer Support – for placing an order, obtaining price & delivery:

[e-mail]

Sales Department – for general sales information:

[e-mail]

Repair and Calibration Service – for information on repair & calibration, obtaining a user manual:

[e-mail]

Technical and Product Application Support – for technical and application support:

[e-mail]

Webmaster – for information regarding www.aemc.com:

[e-mail]

South America, Central America, Mexico, Caribbean, Australia & New Zealand:

Chauvin Arnoux

®

, Inc.

d.b.a. AEMC

®

Instruments
15 Faraday Drive
Dover, NH 03820 USA
[phone] • Fax [phone]
[e-mail]
www.aemc.com

All other countries:

Chauvin Arnoux SCA
190, rue Championnet
75876 Paris Cedex 18, France
33 1 44 85 45 28 • Fax [phone]
[e-mail]
www.chauvin-arnoux.com