This topic is too big, to write it down in one sentence, because anyone should have a pat tester: I couldn't believe it myself, how many electrical things in my household are rubbish and does not stand the simple PE test - and here comes another one, which I have used daily so far with my computer, as it runs without a problem: My first DJMixer!
Just as an example: This DJMixer, which is Class 1, does not stand the PE test, thus it is not save to use any longer and needs a check up!
Good to see, that both of my pat testers are showing the same values:
The Metratester 5+ (the black power outlet is only for testing purposes without mains, the white is with mains)
The Secutest Pro gives you two possibilities: The "Red Ring" is for one of several automatic test sequences such as the EN62368 for instance with saved limits, here: less than 100mOhm. When the result is above the limit and therefore not shown in green but red, you have to abort the test and cannot go any further (if you want to pay an extra sum, GMC sells you the ability to bypass this, to go any further). I could change the limit, to bypass this, but does not want to, as it is not save and correct to do so...
However, the "Green Ring" is the manual test of the Secutest Pro, which can be compared with the "Metratester 5+" itself. No measured value is coloured in "green" or "red", but simply "white" and you have to estimate the result on your own or whether you want to test any further...
There are special European Norms for testing Audio-Equipment EN62368 and EN62911 (production line) together with the known EN50678 (after repair) and EN50699 (recurrent tests):
The "Gossen Metrawatt Metratester 5+" is simple to use and has all you need. I was also able to play with a Fluke 6500-2 (therefore I know the differences to the Fluke 6200-2), I owned a "Benning ST 725" (which is and has several clones), which I sold a month ago and finally bought a used "Gossen Metrawatt Secutest Pro" for my private use, as I love testgear...
PS and only as a short note: My "Secutest Pro" has a successor called "Secutest ST Pro", with the newest "European Norms" already included, but as I paid for the update "EN50678/EN50699/EN62368/EN62911" to also use automatic sequences, mine is now identical to the ST-Version, so that I only refer to my unit, as there are too many other things to consider with locked and unlocked Firmware-Features as mentioned above to bypass a negative test for example...
However, the most important things are:1. different countries may have different limiting values, allthough the test equipment is the same brand and model
2. some pat testers have no automatic test sequence (Metratester 5+) and other units have both possibilities (Secutest Pro)
3. some pat testers can only measure with 500V (Fluke 6200-2), but other units are also able to measure with 250V (Fluke 6500-2, Benning ST 725) or the way you want from 50V to 500V (Secutest Pro), to treat sensitive components with care
4. any pat tester has to measure with at least +200mA (Benning ST 725), but only some units are also able to measure with 10A (Fluke 6200-2, Fluke 6500-2) and some are also able to measure with +200mADC, -200mADC, +/-200mADC, 200mAAC and 10AAC (Secutest Pro)
5. some units have no internal clock (Fluke 6200-2), others have (Benning ST 725) and other units even have a build in database to save and document any measurement for later usage and documentation with time and date and serial number of any equipment and so on... (Fluke 6500-2, Secutest Pro)
6. with an additional piece of software IZYTRON.IQ, you can even build your own personal test sequence the way you like (Secutest Pro)
Cheers!