Ground Testers Archives - rapid-tech

Extech CT70 AC Circuit Analyzer and GFCI (RCD) Tester

Mike — Thu, 10 Sep 2020 21:58:10 +0000

The Extech CT70 AC Circuit Analyzer can detect circuit and wiring problems such as: Poor ground impedance, false grounds, missing ground fault protection, low voltage availability under load, and high ground-to-neutral voltage. In addition, the CT70 tests GFCI and EPD circuits.

Circuit and wiring issues listed above can introduce shock hazards (from grounding issues) and can comprise performance of machinery and equipment (from poor ground impedance, lack of sufficient voltage under load and/or high ground-to-neutral voltage). In addition, fire can result from the heat generated by high resistance points in a circuit.

Proper wiring habits have been shown to greatly increase power quality performance

Extech CT70 AC Circuit Analyzer Features

True RMS measurements
Voltage drop measurements on 12A, 15A, and 20A loads for 120 V circuits
Voltage drop measurements on 5A, 8A, and 10A loads for 230 V circuits
Voltage measurements: Line, ground-to-neutral, and peak
Measures frequency of the voltage
Checks 3-wire receptacle configuration
Finds false grounds
Tests GFCI and EPD circuits
Complete with AC test cord (standard Australian 3 pin 10A plug).

Extech CT70 Measurement Specifications
	Range and Resolution	Accuracy
Line Voltage (Single phase)	100.0 to 250.0 VAC	± (1.0% + 0.2V)
Peak Line Voltage	121.0 to 350.0 VAC	± (1.0% + 0.2V)
Frequency	45.0 to 65.0 Hz	± (1.0% + 0.2Hz)
Voltage drop (%)	0.1 to 99.9%	± (2.5% + 0.2%)
Voltage (under load)	10.0 to 250.0 VAC	± (2.5% + 0.2V)
Neutral to Ground Voltage	0.0 to 10.0 VAC	± (2.5% + 0.2V)
Impedance	0.00 to 3.00 Ω (Hot)	± (2.5% + 0.02Ω)
Impedance	>3 Ω (Neutral, Ground)	Unspecified
GFCI Trip Current	6.0 to 9.0mA	± (1.0% + 0.2mA)
EPD Trip Current	30.0 to 37.0mA	± (1.0% + 0.2mA)

General Specifications
Display	128 x 64 LED with backlighting
Voltage display update rate	2.5 seconds max.
Over range indication	‘OL’ display
Equipment Power Rating	100 to 250 VAC 3.9 VA, 45 to 65Hz, 18.0mA
Operating Temperature	0°C to 50°C
Operating Humidity	Max 80%
Dimensions	203 x 71 x 51 mm
Weight	317.5g
Safety approvals	CE, ETL

The post Extech CT70 AC Circuit Analyzer and GFCI (RCD) Tester appeared first on rapid-tech.

EXTECH 382357 Clamp-on Ground Resistance Tester

Mike — Thu, 17 Mar 2016 06:44:26 +0000

Additional Features of the Extech 382357:

Measures resistance from 0.03Ω to 1500Ω and True RMS AC Leakage current from 0.2mA to 30.00A. It 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. Cat III-300V.

Applications

Clamp-On Ground Tester simplifies ground resistance measurements on multiple-point ground systems. Use to verify the resistance of cellular and communication tower ground grids, check utility transmission systems and grounding rods, perform maintenance on electrical transportation systems. Ideal for verifying ground systems in sub-stations, factories, and office buildings.

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

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 4 to 18°C and 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	-20 to 50°C with < 85% RH
Storage conditions	-28 to 60°C with < 75% RH
Dimensions	258 x 110 x 47mm
Weight	700g
Accessories	Resistance check plate, 9V battery, carrying case

The post EXTECH 382357 Clamp-on Ground Resistance Tester appeared first on rapid-tech.

EXTECH 382252 Earth Ground Resistance Tester Kit

Mike — Wed, 16 Mar 2016 19:18:53 +0000

The Extech 382252 Earth Ground Resistance Tester Kit. This device can measure Earth Ground Resistance (in 3 ranges), Earth Voltage and Resistance (up to 200kOhm and AC and DC voltage

The Extech 382252 includes all hardware necessary to measure earth ground in 3 ranges from 20 to 2000 Ohm

Extech 382252 Features:

Large dual display with backlight
Test Hold function for easy operation
Automatic Zero adjustment
AC/DC Voltage, Resistance, and Continuity
Auto Power off, Overrange and low battery indication
Complete with test leads, 2 auxiliary earth bars, carrying case, protective rubber holster and six 1.5V AA batteries

Extech 382252 Specifications:

Earth Ground Resistance ranges	20Ω/ 200Ω/2000Ω
Basic Accuracy	±(2%rdg+2d)
Resolution	0.01Ω/ 0.1Ω/1Ω
Test Current / Frequency	<2.5mA / 820Hz
AC Earth Voltage / Frequency	0 to 200VAC / 50 to 400Hz
Accuracy	±(3%rdg+3d)
DC Voltage	0 to 1000V
Accuracy	±(0.8%rdg+3d)
Resistance	0 to 200kΩ
Accuracy	±(2%rdg+2d)
Continuity	40Ω
Power supply	Six 1.5V AA Batteries
Dimensions	200 x 92 x 50mm
Weight	700g (meter only)

Cleaning and Storage

Periodically wipe the meter’s case with a damp cloth and mild detergent; do not use abrasives or solvents. If the meter is not to be used for a period longer than 60 days, remove the batteries and store them separately

The post EXTECH 382252 Earth Ground Resistance Tester Kit appeared first on rapid-tech.