Fast and Easy Ground Resistance Measurement with AEMC 3711 and 3731 Clamp-on Ground Resistance Testers

  • Uncategorized

To check for the efficiency of electrical ground connections, technicians measure the ground resistance. Ideally, an electrical ground that has good contact with the Earth should have low resistance. The resistance of the ground connection may increase due to dry soil, corroded terminals or an uprooted stake. When this happens, the monitoring circuits may malfunction and not be able to protect the electrical system in case of a fault. There is also a high risk of personnel getting electrocuted when an insulator opens. It is a good idea to regularly measure the resistance of the electrical ground to ensure continuous operation of the electrical facility.

The common method of measuring ground resistance is using the 2, 3 or 4 wire method. This method can take too much time and effort because you need to use multiple leads and space them properly to measure ground resistance. The multiple wire method also uses bulky test equipment which can be difficult to carry around especially in the field. If you want a fast and simple way of measuring ground resistance, consider getting a clamp-on tester. This tester doesn’t use any leads which helps shorten set-up time and diagnostics.

When looking for a good clamp-on tester, you may want to consider AEMC’s 3711 or 3731 ground resistance testers. These devices can help you save time and effort measuring ground resistance because you just have to clamp the jaw to the ground connection. 

To help you choose which tester to get, read on for a short comparison of the AEMC 3711 and 3731.

AEMC 3711 Clamp-On Ground Resistance Meter

The 3711 features a simple and fast operation. Just clamp the jaw on and you can measure ground resistance in seconds. You don’t need any test of auxiliary leads or need to worry about proper spacing. 

Features

  •        Portable, lightweight and easy to use
  •        Measures ground resistance from 0.01 Ω up to 1200 Ω
  •        Can directly read ground loop resistance, ground leakage, phase current and continuity
  •        1.25″ jaw opening
  •        Has a display hold feature
  •        Included accessories:

o   9-Volt Battery

o   Carrying Case

o   Instruction Manual

o   Calibration loop

AEMC 3731 Clamp-On Ground Resistance Meter

The AEMC 3731 ground resistance meter is similar to the 3711 but with additional features like an alarm and an internal memory. The internal memory lets you store up to 99 test results for future reference. This makes a comparison of test results of various ground connections easy.

Features

  •        Portable, lightweight and easy to use
  •        Measures ground resistance from 0.01 Ω up to 1200 Ω
  •        Can directly read ground loop resistance, ground leakage, phase current and continuity
  •        1.25″ jaw opening
  •        Has a display hold feature
  •        Alarm function
  •        Internal memory storage of up to 99 test results
  •        EN 61010, CAT III Rating
  •        CE and UL approvde with double insulation
  •        Included accessories:

o   9-Volt battery

o   Carrying case

o   Instruction Manual

o   Calibration loop

The AEMC 3711 Clamp-on Ground Resistance tester is an ideal device for small electrical facilities that do not have many ground connections. It offers basic functionality and smooth operation.

Larger electrical facilities will greatly benefit from the AEMC 3731 because of its internal memory and alarm function. When you have a lot of electrical ground connections to test, the internal memory makes comparison of test results easy. Comparing test results can help a technician determine if a fault is isolated in one area or if there is a bigger problem that is affecting the whole electrical ground system.

For your electrical test equipment needs, consider Protec Equipment Resources. We provide various options in acquiring test equipment. We offer test equipment rental, leasing and equipment sales to suit your needs. You can be confident that you’ll receive test equipment in a timely manner. Our distribution centers are strategically located to ensure that we can deliver equipment promptly in any state. Contact a Protec representative today for more details or for a quote.