Discuss Fluke 6500 paramenter change for extension leads in the Electrical Testing & PAT Testing Forum area at ElectriciansForums.net

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hiya ratty. i have a fluke 6500, the way i do it is to carry out class 1 auto test 131 as normal, when it does the earth continuity test carry on as normal, if it fails because its more than 0.10 ohms it will give you the option to accept the fail or accept the results as a pass according to the length of the flex, so you scroll to the length of the flex and press Yes, if it is within tolerance it will give you a pass result
 
What andy forgot to mention is that first, when it fails on earth continuity, you press the Setup button to change the cable dia and/or length. If you have it switched on (which it should be by default) the on-screen display should tell you this.
 
Cant get my 6500 to do it.......................back to using the table & calc it myself.

So what happens then?
You do realise that you can not preset the 6500 for extension leads - you have to do a test first, which then fails on continuity (>0.1 ohm) and THEN it gives you the option to press the setup button and alter the conductor dia and cable length. And this has to be done for each extension lead - a real pain when you are testing lots of them together. After pressing the setup button, use the right-arrow to move to the next field and the up/down arrows to select the dia and length values. It is not very user-friendly but is does work. The acceptable continuity changes on the display as you select different values for dia and for length.
 
Auto test 131 - fails bond at .83 ohm & displays retest press yes or accept result & abort test press No.

Try pressing set up here but nothing changes. only buttons that work are the YES & NO, yes just re-tests & no just accepts the fail & goes to memory/record test. pushing set up here just goes to the normal set up page (Bond zero etc etc).
 
Auto test 131 ...

Therein lies your problem. Autotest 131 is for class I appliances. Extension leads should be tested by plugging an IEC lead in to the extension sockets (each of them in turn), and doing an IEC test. You are in effect creating a long, daisy-chained IEC lead. It is the IEC test that gives you the option to change the lead length if the bond test fails. Doing a '131' test will not check the integrity of the socket connections in the extension lead, and this is the point where excessive connection resistance can occur with using an extension lead.
 

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