• Clamp-on ground resistance measurement without auxiliary rods, on multi-grounded and energized systems
• Ground resistance auto-ranging 0.010 to 1500 ohms; jaw opening 1.38 in (35 mm)
• Leakage current measurement auto-ranging 0.200 mA to 39.99 A
• Loop inductance measurement 10 to 500 uH; calculated contact (touch) voltage 0.1 to 75 V
• Ground voltage indication warns of possible unsafe conditions; noise icon and buzzer for dangerous voltage and current
• Selectable test frequency (50, 60, 128 or 2083 Hz) for impedance calculation in inductive environments
• 3 separate alarms (ohms, volts, amps) with adjustable set point and buzzer
• Storage of up to 300 time-stamped measurements on a bright yellow OLED display
• Rugged Lexan head and body; 600 V CAT IV safety rating

• Utilities and substations: verify ground rod and grid resistance without disconnecting the ground system
• Grounding and bonding maintenance: check connection quality, bonds, and continuity of loops around pads and buildings
• Lightning protection and industrial sites: field checks of electrode resistance with alarm-based pass or fail
• Traffic and DOT signal grounding: quick clamp-on measurement of ground integrity

• Type: clamp-on ground resistance tester (measures resistance and leakage current, no auxiliary rods)
• Ground resistance range: auto-ranging 0.010 to 1500 ohms; resolution from 0.001 ohm; accuracy from plus or minus (1.5 % Reading + 0.01 ohm)
• Current measurement: auto-ranging 0.200 mA to 39.99 A; accuracy from plus or minus (2 % Reading + 50 uA)
• Loop inductance: 10 to 500 uH; resolution 1 uH
• Contact (touch) voltage: calculated, 0.1 to 75 V
• Frequency selection: 50, 60, 128 or 2083 Hz for impedance calculation
• Maximum overload: permanent current 100 A max (50/60 Hz)
• Display: OLED, 152 segments (48 x 39 mm)
• Memory: 300 measurements
• Alarm: 3 separate alarms (ohms, V and A), adjustable set point
• Power source: (4) 1.5 V LR6 (AA) alkaline or (4) NiMH batteries; battery life 12 h or approx. 1440 30-second tests
• Jaw opening: 1.38 in (35 mm) max
• Dimensions: 2.16 x 3.74 x 10.31 in (55 x 95 x 262 mm); weight 2.06 lb (935 g) with battery
• Operating temperature: -4 to 131 F (-20 to 55 C); storage: -22 to 158 F (-30 to 70 C)
• Relative humidity: up to 90 % at 40 C; ingress protection IP40

Safety: IEC 61010-1, EN 61010-2-30, EN 61010-2-32, Pollution Degree 2, 600 V CAT IV; EMC EN 61326-1

The AEMC 6416 answers a simple field question without the setup a fall-of-potential test requires: what is the resistance of this ground, and is it safe. Clamp the tester around a grounding electrode or conductor and it measures the resistance to ground on multi-grounded systems, so you keep the ground bonded and energized while you test. Because you are measuring an intact ground, you also verify the quality of the connections and bonds, and you can check resistance and continuity of grounding loops around pads and buildings.

The 6416 measures ground resistance by auto-ranging from 0.010 to 1500 ohms, reads leakage current from 0.200 mA to 39.99 A, measures loop inductance, and calculates contact (touch) voltage. A ground voltage indication warns of possible unsafe conditions, and a noise icon and buzzer flag dangerous voltage and current. Three separate alarms (ohms, volts, amps) with an adjustable set point give you quick pass or fail checks, and up to 300 readings store with a time stamp on the bright OLED display.

Rated 600 V CAT IV with a rugged Lexan head and body, it is built for substations, utilities, and industrial sites.