Atec AEMC-3620 User Manual

Models 3620 & 3620 Kit (pdf)

Rev. 02

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The Analog Ground Resistance Tester
Model 3620 performs ground resistance
measurements from 0.5 to 1000Ω with
speed and accuracy.

The Model 3620 features three-terminal
operation for Fall-of-Potential earth/
ground resistance and also may be
used for 2-Point tests.

The large 3.1" logarithmic analog scale
is easy to read, with a separate mark­ing for 25Ω.Alarge Press-to-Measure
button allows for easy measurements.
A manual zero adjust is provided for
accurate readings. Color-coded
binding post terminals are easy-to-use
with banana plug and spade lug inputs.

The heavy duty ABS case is O-ring
sealed against dust and water, and the
Press-to-Measure button is also sealed.
The Ground Tester Model 3620 is
battery powered, for convenient use in
remote field applications. Mechanical
and safety specifications, such as
vibration and drop test, meet or exceed
IEC standards, to ensure safe and
reliable field use.

The Ground Resistance Tester Model
3620 is the ideal instrument for electrical
contractors, power utilities, REAs,
telephone and CATV technicians, and
inspectors who must check ground to
determine compliance with NEC

®

,

OSHA and other specifications.

The Model 3620 is also available in
a complete kit form, which includes
meter, 16 ft lead, two 150 ft leads on
spools with wind-up handles to reduce
lead tangling and two auxiliary ground
electrodes packaged in a high-impact
molded hard carrying case.

Ground Resistance Tester
Model 3620 & 3620 Kit

Model 3620 Kit (optional)

Catalog #2114.91

Models 3620 & 3620 Kit (pdf)

Rev. 02

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Model 3620 shown in

standard soft carrying case

Catalog #2114.90

Features

• Fall-of-Potential method for 2- and

3-Point ground resistance tests

• Direct reading on large analog

display 0.5 to 1000Ω and easy
25Ω readings

• Large 3.1" (77mm), easy-to-read

scale for accurate readings

• Built-in battery check

• Three color-coded terminals

• Large Press-to-Measure button

• Portable and compact

• Extremely simple to operate:

connect – press – read

• Designed to reject high levels

of noise and interference

Applications

• Measuring earth resistance of the

type of single rod or small ground
grids often found in remote
telecommunication switching sites

• Measuring ground electrode

resistance of lightning protection
equipment

• Measuring the earth electrode

resistance of equipment in
recreational areas

• Testing electrode resistance

of ground rods and grids at
new construction sites, when
utility supplied power has not
been supplied

• Testing earth electrode resistance

of grounded towers at cellular
phone remote installations

Models 3620 & 3620 Kit (pdf)

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Specifications

ELECTRICAL

Range 0.5 to 1000Ω
Resolution 10mΩ
Test Current 10mA
Resistance Measurement

Frequency

128Hz square wave

Accuracy ±5% of Reading + 0.1% of galvanometer scale length
Auxiliary Electrode Influence Rz 3000 times the reading up to 50kΩ Ry 50kΩ
Withstanding Voltage 250Vrms with spikes of 3000VAC

or 1000VDC

Power Source Eight 1.5V “AA” Alkaline batteries
Battery Life 1680 15-second tests (approximately)
Fuse Protection High breaking capacity 0.1A, >250V, 0.25 x 1.25"

MECHANICAL

Display Analog Pivot movement
Connection Color-coded terminals accept spade lugs with minimum gap of 6mm or

standard 4mm banana jacks

Scale 3.1" (77mm) white scale with black pointer; one scale per range
Operating Temperature 14° to 131°F (-10° to 55°C)
Storage Temperature -40° to 158°F (-40° to 70°C), 0 to 90% RH with batteries removed
Temperature Influence 5% per 10°C
Relative Humidity 20 to 90% maximum
Dimensions 8.7 x 5.4 x 5.9" (220 x 136 x 150mm)
Weight 2 lbs (1.3kg)
Case Heavy-duty, ABS
Colors Case safety yellow; Front panel gray
Mechanical Shock IEC 68-2-27
Vibration Test IEC 68-2-6
Drop Test IEC 68-2-32
Environmental O-ring sealed against dust and water to IP50

SAFETY

Rating EN 61010-1, Cat. III, Pollution Degree 2, 24V
Agency Approval Emission: EN 50081-1

Immunity: EN 50082-1

CE Mark Yes

Test Kit for Model 3620 includes

16 ft lead, two 150 ft leads on spools, two wind-up

handles, two auxiliary ground electrodes and

molded hard carrying case with slot for meter

Catalog #2114.96

Model 3620 Kit

Catalog #2114.91

Accessories

Models 3620 & 3620 Kit (pdf)

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25Ω Calibration Checker

Catalog #2118.58

11. Input terminal X (C1)

12. Input terminal Y (P2)

13. Ground resistance shorting link

14. Input terminal Z (C2)

15. Display

16. Zero adjustment screw

17. Low battery indicator

18. X-Z fault indicator

19. X-Y high resistance indicator

10. X-Y high noise indicator

11. Press-to-Measure button

ORDERING INFORMATION CATALOG NO.

Ground Resistance Tester Model 3620 (3-Point Analog) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2114.90

Includes soft carrying case, batteries and user manual

Ground Resistance Tester Model 3620 Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat.#2114.91

Includes meter, one 16 ft lead, two 150 ft leads on spools with wind-up handles, two auxiliary ground
electrodes, molded hard carrying case, batteries and user manual

Accessories (Optional)

25Ω Calibration Checker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.59

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

Test Kit for 3-Point Testing (supplemental for 4-Point testing) includes two 100 ft color-coded leads,

one 16 ft lead, two 16" T-shaped auxiliary ground electrodes and carrying case . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.61

Test Kit for 3-Point Testing includes two 150 ft color-coded leads on spools, one 16 ft lead, two 16" T-shaped

auxiliary ground electrodes, 100 ft AEMC tape measure and carrying case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.62

Test Kit for 4-Point Testing includes two 300 ft color-coded leads on spools, two 100 ft color-coded leads, one 16 ft lead,

four 16" T-shaped auxiliary ground electrodes, 100 ft AEMC tape measure and carrying case. . . . . . . . . . . . . . . . . Cat. #2130.63

Ground Tester Video/Workbook set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cat. #2130.64

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Models 3620 & 3620 Kit (pdf)

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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