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CET 500 Digital Clamp Earth Resistance Tester

CET500 Clamp Earth Ground Tester based on the rogowski coil principle provides a quick & safe method for measuring earth ground resistance without disconnecting circuit earthing / ground lines or without stakes & wires. Simply clamp the meter around the earthing strip wire and measure within range of 0.01 to 1200 ohms.

The double insulation design ensures instrument durability for outdoor work and effectiveness in blocking interference signals from the environment.

The CET500 stake-less earth resistance tester provides additional feature of measuring leakage current upto 30A.

The CET500 digital clamp on earth tester features a built in EBTN display to allow use in dark environments.

The Jaw size of 65X32 mm has been designed to easily accommodate earth strips. A test ring is provided to allow test & confirm instrument status before actual operation to ensure accurate results.

The CET500 is ideal for use in power plants & substations, Telecommunication installations, checking building lighting protection & grounding in industrial installations.

The CET500 clamp on earth resistance tester comes in an ergonomic carry case which includes 4 X 1.5 V batteries, 1 calibration test ring & user manual. 

Product Specification
Model Selection Range CET500
Auto Range  
Display Count 4 Digits LCD Display  
Jaw Size 32mm  
Earth Ground Resistance (Ω) 0.01~0.099Ω ±(1%+0.01)
0.1~0.99Ω ±(1%+0.01)  
1~49.9Ω ±(1%+0.1)  
50~99.5Ω ±(2%+0.5)  
100~199Ω ±(3%+1)  
200~395Ω ±(6%+5)  
400~590Ω ±(10%+10)  
600~800Ω ±(20%+20)  
600~1000Ω -  
800~1200Ω ±(25%+30)  
Leakage Current (A) 0mA~9mA ±(2.5%+1mA)
10mA~99mA ±(2.5%+5mA)  
100mA~299mA ±(2.5%+10mA)  
0mA~299mA -  
0.3A~2.99A ±(2.5%+0.1A)  
3A~9.9A ±(2.5%+0.3A)  
10A~20A ±(2.5%+0.5A)  
3A~30A ±(2.5%+0.5A)  
Resistance Measurement Frequency >1kHz
Single Measurement Time 1 Second
Current Limit Alarm 1mA~499mA
Current Measurement Frequency 50Hz/60Hz
Auto Power Off -  
Visual and Audible Alarm  
Jamming Signal Recognition  
Over-Range Display  
Data Storage 300 Data Sets  
Category Safety Ratings CAT III 300V  
General Characteristics    
Power 1.5V Battery (Lr6) x 4  
Display EBTN Display  
Product Net Weight 1160g  
Product Size 285mm x 85mm x 56mm  
Standard Accessories Batteries, Test Ring, Toolbox  
  • Resistance limit alarm
  • Auto range
  • Low battery indication
Frequently Asked Questions (5 answered questions)
Yes, It measures Leakage Current Up to 30 A.

Person name: Asian

Yes, It stores upto 300 data sets.

Person name: Asian


Person name: Asian

Safety Category ratings is CAT III 300V

Person name: Asian

Yes, it is an ideal solution for the same

Person name: Asian

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August 04 2021 16:52:51
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