I am often asked by people who have purchased any of the easytest range of Portable Appliance Testers, “my easytest tradie isn’t doing anything” or “my easytest mega display flashes between the normal screen and ‘connect probe to earth’”
The easytest range works differently to others. People who have used the normal range look for something hard, like a menu system to tell the unit what it is testing or a start button to tell it when to start. The easytest range doesn’t need any of this, it doesn’t care what the class is, and it is testing for all faults all of the time so it doesn’t need to be told when to start or stop. Below is a picture of the easytest tradie display. For a more detailed description go to the easytest tradie or easytest mega instructional video.
Notice the top line displays “CL1 EARTH FAIL” this is because there is no earth connected at this time, or the connected earth exceeds 1 Ohm. If you have done my on line testing and tagging training course you would know that the earth resistance must not exceed 1 Ohm. If there is no earth connected the earth resistance is infinity therefore it “FAILS” which is what the tradie displays. If an earth is connected with a resistance of less than 1 Ohm, the display will instantaneously change to “PASS”, because that is what it now sees. The same will display if you are testing a class 2 piece of apparatus. If you have done my on line testing and tagging training course you would know that class 2 doesn’t have an earth, so it displays “FAIL” and can be ignored.
The same for the second line. If nothing is plugged into the tradie, or the appliance under test does not have any earth leakage as described in detail in my on line testing and tagging course, the tradie will display “PASS” for both class 1 and class 2 because that is what it sees at that time. If the earth leakage exceeds 1 mA the display will instantly change to “CL2 FAIL”. If the earth leakage exceeds 5 mA it will display “CL2 FAIL CL1 FAIL”. If the earth leakage exceeds about 8 mA, the tradie or the mega will display “DANGEROUS FAULT” and automatically shut down and cannot be restarted until all power has been switched off.
This article was written by tom