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Clamp On Earth Resistance Tester ST-CERT PLUS

New generation digital clamp on earth ground resistance tester, based on loop resistance principle that provides earth resistance measurements without using any auxiliary spike electrodes or unhooking ground earth wire. The unit simply has to be directly clamped onto the ground wire or stripped to obtain earth resistance value with high accuracy. 

Especially applicable to locations such as buildings with cemented or tiled floors where there is no ability to use earth spikes and direct clamping is the only option. On Site calibration is a standard feature and the instrument will recalibrate each time before use after the instrument has been switched on. The large jaw opening allows use on almost every type of earth ground wire or strip. The unit also measures leakage current.

Product Specification
Range Accuracy
Earth Resistance 0.010-0.099Ω 0.001Ω ± (1%+0.01Ω)
0.10-0.99Ω 0.01Ω ± (1%+0.01Ω)
1.0-49.9Ω 0.1Ω ± (1.5%+0.1Ω)
50.0-99.5Ω 0.5Ω ± (2%+0.5Ω)
100-199Ω 1Ω ± (3%+1Ω)
200-395 Ω 5Ω ± (6%+5Ω)
400-590Ω 10Ω ± (10%+10Ω)
600-1000Ω 20Ω ± (20%+20Ω)
Current 0-299mA 1mA ± (2.5%+5mA)
0.30-2.99mA 10mA ± (2.5%+10mA)
3.00-20.00A 10mA  ± (2.5%+20mA)
Outer Magnetic Field  <40A/m
Outer Electric Field <1V/m
Unit Measuring Time  1s
Measurement Resistance Frequency  >1KHz
Maximum Resistance Measurement Resolution  0.001 Ω
Measured Current Frequency  45~65Hz
Measured Data Storage  50 units
Setting Range of Resistance Alarm Critical Value  1-199 Ω
Setting Range of Current Alarm Critical Value  1-499mA
Protection Scale  Double insulated
Operation Way  Auto Ranging
Width of Jaw  66 mm
Display Backlight  
Data hold/storage  
Auto Power Off  
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May 27 2019 10:57:10
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