UK How do you use a Megger avo to read 4 to 20 milliamp signals

[Garry Corbett]

Hi all. How do i use my megger avo410 to read 4 to 20 milliamps

 

[DPG]

Hi all. How do i use my megger avo410 to read 4 to 20 milliamps

I've only had a brief look at the spec, but I don't think it has a mA range does it?

Welcome to the forum by the way!

 

[Julie.]

Plug the leads into com and Amp
Select Amps. **

It will auto range, but you can select a particular range using the range button.

But the range will be 0 to 600uA, 0 to 6mA etc.

If you actually have just 4mA the 0 to 6mA range will be ok, if it's more than 6mA, you would have to select the next range. (Or allow it to auto range)

EDIT**

I assumed you wanted ac Amps, but I re read it - are you using it to measure an analogue 4-20mA signal?

If so this would be DC not ac

 

[timhoward]

I've only had a brief look at the spec, but I don't think it has a mA range does it?

Welcome to the forum by the way!

...trying to remember how micro-amps work....10 ^ -4 ?
Looks like it will auto-range anyway and it has a 600 micro-amp range accurate to 1% plus 2 digits

 

[DPG]

Apologies. The web page I looked at didn't list a current range at all in the spec list. Must have been duff info!

Edit, I've just found the correct info - the page I was on earlier was something entirely different.

Don't forget to choose the correct current setting (ie DC Amps rather than AC)

 

[Garry Corbett]

Hi thanks guys have worked it out have to use the10amp lead socket not the micro amp socket. Then alter the range so it reads 0.004 for 4 milliamps and 0.020 for 20 milliamps. I had a fluke multimeter at my previous job and this read the milliamps as 4 and 20 so this one threw me a bit. Thanks for all the input, cheers ( had to hand back the fluke when previous firm went insolvent bit of a bugger lol)

 

[Lucien Nunes]

how micro-amps work....10 ^ -4 ?

10^-6. Powers go in threes - milli (-3), micro (-6), nano (-9), pico (-12), notworthbotheringabouto (-15)

 

[sunray]

I will put my hand up here and say I find auto ranging and 4-20mA don't mix. Of course it depends on what you're measuring and how fast the changes are, but even so I've managed to take multiple readings at a controller and misread... say 165uA as 16.5mA. Fortunatly I have several meters with switchable ranges including 20mA.

Also I have a device; switchable to read/source 4-20mA/0-10V and IIRC can also display as %... not used it for 5+ years due to age/retirement and can't for the life of me remember the make.

I've also seen a lovely Fluke multimeter some years back with a 4-20 source function. For some reason I recall it's 3 concecutive numbers like 345 or 789 but well out of my price range.

 

[littlespark]

10^-6. Powers go in threes - milli (-3), micro (-6), nano (-9), pico (-12), notworthbotheringabouto (-15)

It would have taken several of those last ones coursing through your brain to allow you to type that.


Let’s go the other way…

10^3 kilo
^6 mega
^9 giga
^12 tera

We’re up to tera in everyday life with terabytes on a hard drive…

^15 peta
^18 ?
^21?????

 

[pc1966]

We’re up to tera in everyday life with terabytes on a hard drive…

^15 peta
^18 ?
^21?????

Exa
Zetta

Oddly enough the ZFS ("zettabyte file system") goes to an exabyte max on one file, but WAY over a zettabyte in maximum storage pool size. So much so that nobody is physically going to get there in my lifetime!