The AEMC Digital Ground Resistance Tester Model 4620 performs earth ground resistance and soil resistivity tests

This direct reading tester measures from 0 to 2000Ω, and is auto-ranging, so it automatically seeks outs the optimum measurement range. The Model 4620 is rugged, easy-to-use and is ideal for maintenance crews performing numerous tests. It exceeds mechanical and safety specifications for shock, vibration and drop tests specified in IEC standards. It is designed to reject high levels of interference, so it can be used under difficult conditions such as high stray currents that normally affect accuracy.

The Model 4620 is also available in complete Kits (150ft, 300ft and 500ft).

Features / Specs:

Range (Auto-ranging)	0 to 2000Ω
Resolution	0.01 to 1Ω
Test Current	0.1 to 10mA
Accuracy Typical	±(2% Reading +1ct)
Open Voltage	42V peak
Withstanding Voltage	250V AC or 100V DC
Operating Frequency	128Hz square wave
Interference	Rejection to high levels of interference voltage (DC, 50/60Hz, harmonics)
Maximum Auxiliary Rod Resistance	Current Circuit: 3kΩ @ 20Ω range 30kΩ @ 200Ω range 50kΩ @ 2000Ω range
	Voltage Circuit: 50kΩ on all ranges
Response Time	4 to 8 seconds for a stabilized measurement
Display	200 counts, 7 segment LCD, backlight
Power Source	8 x 1.5V C alkaline batteries
Battery Life	4500 15-seconds tests, low battery indicator
Dimensions	10.8 x 9.7 x 5.0” (273 x 247 x 127mm)
Weight (with Battery)	6.28 lbs (2.85kg)
Operating Temperature	14° to 131°F (-10° to 55°C)
Storage Temperature	-40° to 158°F (-40° to 70°C)
Relative Humidity	Up to 90%
Ingress Protection (IP)	IP 65 (closed); IP 63 (open)
EMC	EN 61326-1
Safety Compliance	EN 61557, EN 61010-1, 30V CAT III, Pollution Degree 2