Clamp type grounding resistance tester

The clamp type grounding resistance tester is widely used for measuring grounding resistance and loop resistance in power, telecommunications, meteorology, oil fields, buildings, and industrial electrical equipment. When measuring a grounded system with a circuit, there is no need to disconnect the grounding lead or auxiliary electrodes, which is safe and fast. It can measure grounding faults that cannot be measured by traditional methods and can be applied to situations where traditional methods cannot measure them, because the clamp type grounding resistance meter measures the comprehensive value of the grounding body resistance and grounding lead resistance. There are two types of clamp type grounding resistance meters: long clamp and round clamp. The long clamp is particularly suitable for flat steel grounding applications.

1. Range and accuracy

Measurement Mode	measurement range	resolution	accuracy
resistance	0.010Ω-0.099Ω	0.001Ω	±(1%+0.01Ω)
	0.10Ω-0.99Ω	0.01Ω	±(1%+0.01Ω)
	1.0Ω-49.9Ω	0.1Ω	±(1%+0.1Ω)
	50.0Ω-99.5Ω	0.5Ω	±(1.5%+0.5Ω)
	100Ω-199Ω	1Ω	±(2%+1Ω)
	200Ω-395Ω	5Ω	±(5%+5Ω)
	400-590Ω	10Ω	±(10%+10Ω)
	600Ω-880Ω	20Ω	±(20%+20Ω)
	900Ω-1200Ω	30Ω	±(25%+30Ω)
current	0.00mA -9.95mA	0.05mA	±（2.5%＋2mA）
	10.0mA -99.0mA	0.1mA	±（2.5%＋5mA）
	100mA -300mA	1mA	±（2.5%＋20mA）
	0.30A-2.99A	0.01A	±（2.5%＋0.1A）
	3.0A-9.9A	0.1A	±（2.5%＋0.3A）
	10.0A-19.9A	0.1 A	±（2.5%＋0.）
	20.0A-40.0A	0.1 A	±（3%＋1A）

2. Technical specifications

resistance range	0.01Ω-1200Ω
current range	0.00mA-40.0A
Resistance resolution	0.001Ω
Current resolution	0.05mA
data storage	99 groups
Interface	RS232 interface (USB port), software monitoring, data upload to computer, dynamic display
self-check time	≤1s， Quickly enter testing mode upon startup
power waste	≤50mA
Operation button	6 soft keys, performance straight through
Communication line length	1.8m (RS232 data cable)
sound and light	Beep beep beep beep "sound, press the AL key to turn on or off; LCD indicator
Critical value setting range	Resistance: 1-199 Ω; Current: 1-499mA
power supply	6VDC (4 No. 5 alkaline dry batteries), Continuous use for 40 hours
Operating temperature and humidity	-20℃-55℃； 10％RH-90％RH
liquid crystal display	4-digit LCD digital display, length and width 47mm × 28.5mm
Jaw size	Long jaw 65mm × 32mm; Round jaw Φ 32mm
Jaw opening size	Long jaw 28mm; Round jaw 32mm
Clamp gauge quality	Long jaw 1160g; Round jaw 1120g (including battery)
Clamp gauge size	Long jaw: length and width 285mm × 85mm × 56mm Round jaw: length, width, and thickness 260mm × 90mm × 66mm
Explosion-proof marking	Exia Ⅱ BT3
Fixing method of battery cover plate	Screw fixation for safer explosion-proof environments
protection level	Double insulation
structural characteristics	Clamp CT
Shift gears	Fully automatic gear shifting
External magnetic field, electric field	＜40A/m；＜1V/m
Single measurement time	0.5 seconds
Resistance measurement frequency	＞1KHz
Tested current frequency	50/60Hz automatic

Clamp type grounding resistance tester for oil fields

Clamp type grounding resistance tester