Technical Assistance (800) 343-1391 www.aemc.com
FEATURES
• Measures ground resistance
(2- and 3-Point) Fall-of-Potential method
• Large analog display (Model 3620)
• Large LCD digital display (Model 3640)
• Designed to reject high levels of noise
and interference
• Auto-Ranging: automatically selects the
optimum range (Model 3640)
•Battery powered
• Extremely simple to operate:
connect - press - hold - read
•Error indicator lights
•Rugged dustproof and rainproof case
• Color-coded terminals and lead
identification
Performs ground resistance
measurement with speed and accuracy
Models 3620 & 3640
GROUND RESISTANCE TESTERS
Analog/Digital Tester
SPECIFICATIONS
MODELS 3620 3640
Types of Measurements 2- and 3-Point
Display Analog Digital
Soil Resistivity Test No
Measurement Ranges
0.5 to 1000Ω
20Ω:
0.00 to
19.99Ω
200Ω:
20.0 to
199Ω
2000Ω:
200 to
1999Ω
Resolution 10mΩ10mΩ100mΩ1Ω
Test Current 10mA 10mA 1mA 0.1mA
Open Voltage ≤24V peak 42V peak
Operating Frequency 128Hz square wave
Accuracy 5% of Reading ± 0.1%
scale length
3% of Reading ± 3cts;
5% of Reading ± 3cts
Interference All models reject high levels of interference voltage
(DC, 50 to 60Hz, harmonics)
Power Source Eight 1.5V AA batteries (included)
Battery Life Approx. 1680
15-second
measurements
Approx. 1800
15-second
measurements
Low Battery Indication Yes
Fuse Protection High breaking capacity, 0.1A, >250V
CATALOG NO. DESCRIPTION
2114.90 Ground Resistance Tester Model 3620 (Analog, 3-Point)
2114.92 Ground Resistance Tester Model 3640 (Digital, 3-Point)
2135.10 Ground Resistance Tester Model 3620 Kit – 150 ft (Model 3620 and Catalog #2135.35)
2135.11 Ground Resistance Tester Model 3620 Kit – 300 ft (Model 3620 and Catalog #2135.36)
2135.13 Ground Resistance Tester Model 3640 Kit – 150 ft (Model 3640 and Catalog #2135.35)
2135.14 Ground Resistance Tester Model 3640 Kit – 300 ft (Model 3640 and Catalog #2135.36)
2130.59 Calibration Checker – 25Ω for Models 3620, 3640, 4620 and 4630
Model 3640 Kit – 300 ft shown
Test Kit descriptions on next page
IP
Rated
50
www.aemc.com
Technical Assistance (800) 343-1391
GROUND RESISTANCE TESTERS
2 Clamp Method Setup
Selective 3-Point Testing of Multiple Rods
Bonding
Fall-of-Potential, Step-Touch Potential
4-Point Bonding For Very Low Resistance
Soil Resistivity
Typical DataView® Functional Displays
OPTIONAL KITS
Catalog #2135.35
Test Kit for 3-Point
testing includes
carrying bag, two 150 ft
color-coded leads on spools (red/blue), two 5
ft color-coded leads (red/blue), one 30 ft lead
(green), two 14.5" T-shaped auxiliary ground
electrodes, one set of five spaded lugs and
100 ft tape measure.
Catalog #2135.36
Test Kit for 4-Point
testing includes
carrying bag, two 300
ft color-coded leads on spools (red/blue), two
5 ft color-coded leads (red/blue), two 100 ft
color-coded leads (green and black), four 14.5"
T-shaped auxiliary ground electrodes, one set
of five spaded lugs and 100 ft tape measure.
Catalog #2135.37
Test Kit for 4-Point
testing includes carrying bag,
two 500 ft color-coded leads on
spools (red/blue), two 5 ft color-coded leads
(red/blue), two 100 ft color-coded leads (green
and black), one 30 ft lead (green), four 14.5"
T-shaped auxiliary ground electrodes, one set
of five spaded lugs and 100 ft tape measure.
150 ft Kit 300 ft Kit 500 ft Kit
GROUND RESISTANCE TESTERS
