The Ground Resistance Tester Model 6418 measures ground rod, busbar, and grid resistance and impedance without the use of auxiliary rods. Clamp-on ground resistance testers can be used in multi-grounded systems without disconnecting or de-energizing the ground system under test. The Model 6418 simply clamps around the grounding electrode or conductor and measures the resistance to ground. By performing measurements on intact ground systems, the user also verifies the quality of the grounding connections and bonds. Resistance and continuity of grounding loops around pads and buildings may also be measured.
Ground Resistance Measurement
Measurement Range
Resolution
Accuracy
0.010 to 0.099Ω
0.001Ω
±(1.5%Reading +0.01Ω)
0.10 to 0.99Ω
0.01Ω
±(1.5%Reading +0.02Ω)
1 to 49.9Ω
0.1Ω
±(1.5% Reading +0.1Ω)
50.0 to 149Ω
1Ω
±(2.5% Reading +2Ω)
150 to 245Ω
5Ω
±(5% Reading +10Ω)
250 to 440Ω
10Ω
±(10% Reading +20Ω)
450 to 640Ω
10Ω
±(15% Reading +20Ω)
650 to 1200Ω
50Ω
±(20% Reading +100Ω)
Test Frequency
2083Hz
Maximum Overload
Permanent current: 100 max. 50/60Hz; 20A at 800Hz
Current Measurement Range (Auto-Ranging)
Measurement Range
Resolution
Accuracy
0.50 to 9.995mA
50µA
±(2% Reading +200µA)
10.00 to 99.90mA
100µA
±(2% Reading +100µA)
100.0 to 299.0mA
1mA
±(2% Reading +1mA)
0.300 to 2.990A
10mA
±(2% Reading +10mA)
3.000 to 20.00A
100mA
±(2% Reading +100mA)
General Features
Display
OLED, 152 segments 48x39mm
Memory
300 measurements
Alarm
2 separate alarms (Ω and A)
Power Source
4x1.5V LR6 (AA) alkaline batteries or 4 NiMH batteries
Battery Life
12 hours or 1440 30-seconds tests approx.
Jaw Opening
1.26” (32mm) max or 1.18 1.57" (30 x 40mm) or 0.79 x 2.17" (20 x 55mm) bar
Dimensions
11.8 x 4.2 x 2.2” (300 x 106 x 56mm)
Weight (with Battery)
2.6 lbs (1.2Kg)
Operating Temperature
-4° to +131°F (-20 to +55°C)
Storage Temperature
-22° to +158°F (-30 to +70°C)
Relative Humidity
Up to 90% @ 40°C
Ingress Protection (IP)
IP 40
EMC
EN 61326-1
Safety Compliance
IEC 61010-1, EN 61010-2-32, Pollution Degree 2, 100V CAT IV
