uHeat Banner - Forum Discount Available
This official sponsor may provide discounts for members

Discuss Easy Fluke 1652 loop question..... in the Electrical Tools and Products area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

I've just bought one of these (first installation tester). Playing around trying to get used to it, I can't get a reading higher than 0.00 Ohms on the loop impedance test. I've tried it on the furthest points on the loop at home and also on a commercial install.

Also, what is the Zi measurement it gives you on this test? When you turn the unit on and the whole LCD screen shows up you can see there are also Zs and Zr measurements at the top next to the Zi, yet they're not shown on the picture in the manual or mentioned anywhere.

I'm confused, do I need to get the unit changed to Zs to get a proper reading from it? It's a full UK spec unit with UK plug etc so can't see why it wouldn't come out of the box ready for use over here.

Maybe (probably) I'm being daft but as I said it's my first tester and this has thrown me a bit, I expected to just have a Zs setting on the wheel, showing up small resistances just above 0.
 
Aico Carbon Monoxide Detectors
This official sponsor may provide discounts for members
S

sparkyork

hi ive got one of these as well, it sounds like your on about R lo when your getting 0.00, have you zerod your leads?
 
  • Thread Starter Thread Starter
  • #3
Yeah, zeroed the mains lead with some bare wire as per instructions. Just strange there's no mention of Zs in the manual, yet loads of people are going on about measuring it using this machine :S
 
T

tronic

As i understand it (as i have always used the 1652) Zi is their way or saying that you want to measure loop impedance (either Zs or Ze). Are you using the 2 lead or 3 lead method?? I normally use the 3 lead, clipping the earth to that point and holding the other two, or using the plug like you. If you are getting 0.00 it sounds like you are on the wrong setting. Another thing i have noticed is that if the polarity is incorrect (arrows above N PE L indicator) it may misread.

Hope this helps. if not get back and I'll play with mine!!
 
T

tony.towa

Tronic is right the Zi setting is for use on Ze or Zs.
The unit should work straight from the box. You have been trying furthest point presumably with the three pin plug, try using the test leads and see if the meter works, it could be that the plug lead is faulty.
 

ian.settle1

-
Mentor
Arms
Using a Fluke 1652 today to test RCD's got ERROR 4 message on display on further investigation found this comes up when the earth lead is either not connected or is not making a very good contact.
 
D

DanBrown

Hi Cornburn.
I have the fluke 1653 tester but still should be the same method!.

Just give this a try because you should get a definate reading for this!.
1, plug the leads into the tester (the 1 with the plug top on)
2, plug this into a socket outlet
3, turn the tester on and set your dial to ''loop ZI''
4, and now press the test button!.

What you should get is a total Zs reading and will not show 0.00 ohms. If this does show 0.00 ohms you have a problem with either the tester or the test leads. Once you press the test button, take note for a bleep as this will tell you no voltage is present and could possibly indicate a polarity problem.
*Might be a idea to check the fuse in the test leads and the tester*
Let us know how you go on!, and hope the advice is relevent.
 
  • Thread Starter Thread Starter
  • #8
Thanks everyone for the info. I've finally got it sorted now so am glad the unit's not duff! I'm already on my second in a week as the first failed the self test every time you turned it on. Started running through peoples suggestions then realised what it was.

Anyway, the problem was down to intermittent results when zeroing the test leads. It seems that the leads were reading a resistance of about 1.5 Ohms, so when the unit tried to subtract this figure from the loop value (say 0.5 ohms) the best figure it could come up with was 0.00, as it obviously can't show a negative resistance.

I had already tried zeroing the leads again but it still must have registered a higher resistance for the leads than for the loop. After trying many times wrapping a wire round as instructed, it seems to show up about 0.21 for the leads half the time and about 1.5 the rest of the time. I'll wire up a single socket tomorrow to zero it properly with a good connection.

You would have thought for £600 Fluke could have included a little metal cover or spring type device for you to put on the plug to zero it instead of telling you to wrap an old bit of wire around it!

Thanks again for all the replies, glad it turned out to be something simple!

Adam
 
D

DYCHE4230

Cornburn, If you cut a boit of DIN rail about 100mm long drill 3 small indents(do not drill thru) about 30mm apart. You'll find this easy to zero out ya test leads plus its about the right width across to zero your plug lead too....Its a great cheap timesaver:)
 
D

DYCHE4230

If I'm honest I stole the idea.....:) but its very effective and saves loads of messing about
 
J

johntom

Hi
I've just bought a 1652. when you select Z1 how do you then select Ze or Zs? (previously only used a metrel with which had loop or line)?
thanks
 
T

tronic

Hi johntom,

all you need is the Zi setting.

if you remove the supplimentry bonding from the consumer unit and turn the main breaker off, you can measure to get Ze using the Zi settong on the meter.

Then if you connect the bonding back up, and switch your circuit under test on, then take another measurement using your meter and Zi setting. This will give you Zs.

The second reading will be higher than the first. if you subtract Ze from Zs you should get your (R1 + R2).

Hope this helps,

Tronic
 
J

johntom

Hi
thanks for your reply. So f1 button just selects between psc and pfc, what about f3?
 
CK Tools :) The professionals choice when it comes to Electrical Tools
This official sponsor may provide discounts for members

Reply to Easy Fluke 1652 loop question..... in the Electrical Tools and Products area at ElectriciansForums.net

Electricians Tools | Electrical Tools and Products

Thanks for visiting ElectriciansForums.net, we hope you find the Electricians Tools you're looking for. It's free to sign up to and post a question yourself to find a tool or tool supplier either local to you, or online. Our community of electricians and electrical engineers will do their best to find the best tool supplier for you.

We also have a Tiling Tools advice from the worlds largest Tiling community. And then the Plumbers Forums with Plumbers Tools Advice.

Top Bottom