Fluke Phase Rotation Testing help

[Diver233]

im hoping I’m doing something stupid so please chip in with any help.
Recently upgraded my 10 year old Metrel meter with a Fluke 1664. So on the metrel doing phase rotation test on the screen it comes up L1 L2 L3 and tells you it’s correct or not, if its not it actually tells you which is incorrect.
So today I thought I’d try the Fluke, so connected the leads and it says 123 on the screen great I thought, so then tried it in a wrong connection and it comes up 321 on the screen, then tried the third combination and it says 123 again.
Does not read L1,L2,L3 anywhere.
Is this correct on a fluke? Or am I missing something?.

 

[PEG]

Fun fact, most of the liverpool area runs in the wrong direction from the rest of the country.

Happened because of a mistake made years ago when we were transitioning from DC. It' s been the wrong way for so long now correcting it is impossible. The DNO are just aware of it an work around it.

.....and the understatement of the year,goes to.....

 

[PEG]

Had this question,from a young fellow.... I think sometimes,folk think the meter nomenclature,gives the colours,too

1-2-3,2-3-1 and 3-1-2,are all in the same direction whereas 3-2-1,2-1-3 and 1-3-2 are in the opposite direction.

This all sounds like dusty-bin is coming on.....

 

[spark 68]

More correctly as phase sequence

 

[Diver233]

Just to clarify as I don’t think I explained the question very well on my old metrel it gave voltage then across the screen it listed :

L1 L2L3

If any were not in that sequence would put a cross, that’s all.
I had the old meter for 10 years from when I qualified and have never had a fluke so it runs totally different to the meter I am used to, and was not the reading I was used to seeing, may be a bit nieavely I thought all meters would give the same readings.

Another example the old meter would run a full RCD sequence, x1/2- x1-5x and list all the results after, as far as I can see so far (with out instructions) the fluke you have to manually change the range and re press test. So it’s just different to what I’ve had for ten years that’s what I am saying, thought the Fluke would be easier and quicker than the metrel being double the price that’s all.
So as Pete999 said I need to read the manual with it working differently.

 

[Jim_e_Jib]

Just to clarify as I don’t think I explained the question very well on my old metrel it gave voltage then across the screen it listed :

L1 L2L3

If any were not in that sequence would put a cross, that’s all.
I had the old meter for 10 years from when I qualified and have never had a fluke so it runs totally different to the meter I am used to, and was not the reading I was used to seeing, may be a bit nieavely I thought all meters would give the same readings.

Another example the old meter would run a full RCD sequence, x1/2- x1-5x and list all the results after, as far as I can see so far (with out instructions) the fluke you have to manually change the range and re press test. So it’s just different to what I’ve had for ten years that’s what I am saying, thought the Fluke would be easier and quicker than the metrel being double the price that’s all.
So as Pete999 said I need to read the manual with it working differently.

The Fluke will do an auto RCD test for trips times - when you're set to measure trip times, the F2 soft key to the left of the screen should toggle between x1/2, x1, x5 and auto. Once you've been through all the tests in auto, you'll need to press the up and down keys to view all the results.

MFTs all do pretty similar things just in slightly different ways - you'll soon get used to the Fluke and find it just as easy as your Metrel.

Definitely time to look the manual though! https://dam-assets.fluke.com/s3fs-public/166x____umeng0100.pdf

 

[Lucien Nunes]

The difference between the Fluke and the Metrel is only how it displays correct and incorrect sequence. Nether meter can 'know' which two lines are swapped if the sequence is incorrect, because it doesn't 'know' which is which in the first place. If the Metrel displays incorrect rotation by showing two specific lines swapped, that's merely symbolic. Swapping any two lines will correct the sequence, although there's only a 1 in 3 chance that they will then all be labelled the same as they are at the incomer.

OTOH I would expect it to correctly flag up a single line fault, as it merely has to detect the lack of voltage, although some MFTs will still show rotation either correct or incorrect even when the voltage symmetry is badly adrift, e.g. with one line probe connected to neutral.

 

[PEG]

I would agree,that spending a few hours of an evening,having a play,would be time well spent.
I always do this,unless the test instrument or equipment,just won't fit in the lounge....

I remember doing this with one of my Megger mft's,and getting familiar with the alarm limits,polarity reversal,and button functions. It just makes a device more useful,if you can occasionally make good use,of it's capabilities.....which you have paid good money,for

How many times,have folk on here,described a particular function,on a MFT,to have it's long-term owner,say "I never knew it did that..."

 

[davesparks]

More correctly as phase sequence

Not quite, phase rotation and sequence are different. 1-2-3 and 2-3-1 have the same rotation but are a different sequence.

 

[rapparee]

Fun fact, most of the liverpool area runs in the wrong direction from the rest of the country.

Happened because of a mistake made years ago when we were transitioning from DC. It' s been the wrong way for so long now correcting it is impossible. The DNO are just aware of it an work around it.

Greater Belfast is the same. It is different to the rest of NI.

 

[MG201]

231?????

Nope 213

 

[telectrix]

Fun fact, most of the liverpool area runs in the wrong direction from the rest of the country.

Happened because of a mistake made years ago when we were transitioning from DC. It' s been the wrong way for so long now correcting it is impossible. The DNO are just aware of it an work around it.

there's a reason for that, Rob. it's because the Mersey flows east to west, unlike the Thames which flows west to nowhere.