CLAMP METER
The Extech 382357 clamp-on ground resistance tester allows the user to measure ground resistance without the use of auxiliary ground rods. The Extech 382357 clamp-on ground resistance tester measures resistance from 0.03Ω to 1500Ω and True RMS AC Leakage current from 0.2mA to 30.00A. The Extech 382357 clamp-on ground resistance tester features programmable datalogging with 116 points, programmable hi/lo alarms, 0.9" jaw size, self-calibration when powered on, and verification resistors to confirm the accuracy of the meter.
The Extech 382357 clamp-on ground resistance tester ships complete with 9V battery, resistance check plate, and durable metal storage case.
Applications:
Verify resistance of cellular and communication tower ground grids
Check utility transmission systems and grounding rods
Maintenance on electric transportation systems
Ideal for grounding systems in sub-stations, factories and office buildings
Features
Autoranging ground resistance measurements from 0.025Ohm to 1500Ohm with 0.002Ohm resolution
True RMS AC Leakage current range of 0.2mA to 30A with 1.000mA resolution
Programmable Datalogging with 116 data points
Programmable Hi/Lo Alarm
0.9" (23mm) Jaw size for large ground rods
Specification:
Resistance Test Frequency 1.667KHz (15mV rms approx.)
Max Conductor size 0.9” (23mm)
Display 4-digit (9999 count) display
Sampling rate 0.4 seconds
Power supply One 9V battery
Power consumption 40mA
Temp. Coefficient 0.15 times the specified accuracy per degree centigrade (from 39 to 64°F (4 to 18°C) and 82 to 122°F (28 to 50°C))
Current Overload Protected to 100A Continuous, 200A for less than 60 seconds (50/60Hz)
Continuity check Audible tone if reading is less than approx. 40 Ω
Range selection Automatic ranging
Safety Meets the requirements for IEC1010-1 Category III 300V and Category II 600 V
Operating conditions 4 to 122°F (-20 to 50°C) with < 85% RH
Storage conditions -20 to 140°F (-28 to 60°C) with < 75% RH
Dimensions 10.2 x 4.4 x 1.9” (258 x 110 x 47mm)
Weight 24.7oz (700g)
Accessories Resistance check plate, 9V battery, carrying case