TW-11A/B Single Clamp Earth Tester is widely used in the operation of earth resistance testing for the equipments of the fields of power, telecommunication, weather, as well as the other electrical equipments with the function of easy operation, high-accuracy and good adaptation of testing environment.

1. Beyond the limitation of the traditional method of earth resistance testing, no assistance poles, with easy and convenient operation.

2.      No error of electrodes arranging, which can get a results in good consistency under the condition of retesting;

3.      Equipped with standard testing wrapper which can be used to do the self-testing with accuracy..  

Type	Size of jaw（mm）	Measurement range	Description
TW-11A	Long jaw：32×65	0.01-1000(Ω)	Basic type
TW-11B	Long jaw：32×65	0.01-1000(Ω)；0-20（A）	Multifunction type

Measureme mode	Measurement range	Resolution	Accuracy
Resistance	0.010~0.099（Ω）	0.001（Ω）	±(1％+0.01Ω)
	0.10~0.99（Ω）	0.01（Ω）	±(1％+0.01Ω)
	1.0~49.9（Ω）	0.1（Ω）	±(1.5％+0.1Ω)
	50.0~99.5（Ω）	0.5（Ω）	±(2％+0.5Ω)
	100~199（Ω）	1（Ω）	±(3％+1Ω)
	200~395（Ω）	5（Ω）	±(6％+5Ω)
	400~590（Ω）	10（Ω）	±(10％+10Ω)
	600~1000（Ω）	20（Ω）	±(20％+20Ω)
* Electric current	0.00~99 mA	1 mA	±(5％+2 mA)
	100~299 mA	1 mA	±(5％+5 mA)
	0.30~2.99A	10 mA	±(5％+0.03 A)
	3.00~9.99 A	10 mA	±(5％+0.04 A)
	10.00~20 A	10 mA	±(5％+0.05 A)

Display screen	LCD Display screen with the accuracy of 4 bits.
Data storage function	50 groups for storage
limit value of resistance alarm	1-199Ω
limit value of current alarm	1-499mA
Dimension of tester	290mm(length)* 90mm(width)*65mm(height)
Working temperature	－15℃ ~ 60℃
Working humidity	10% ~ 90%RH
Weight of tester	1160g (including battery)
Power supply	4×1.5V AA alkaline dry battery
Protection grade	double insulation

 

 Standard Configuration

No.	Items	Qty.
1	TW-11A /B Single Clamp Earth Tester	1unit
2	Checking Wrapper	1pc 1
3	1.5V AA Dry Battery	4Cells 4
4	User’s Manual	1 brochure 1
5	Aalloy Box	1pc 1