From what comes this abbreviation ?

best wishes

 

OL = Overload

 

From what comes this abbreviation ?

best wishes

A bit of context would be really helpful, as it could mean lots of different things, even if we assume you are talking about the things normally talked about here.

Overload
Open Loop
Out of Limits
Ordered List
Overhead Line
and so on...

 

i mean for sign shown on digital multimeter

 

i mean for sign shown on digital multimeter

For that it likely means Over Limit (above the maximum the voltmeter can read on whatever scale it is set to).

 

i mean for sign shown on digital multimeter

You can think of it as either "overload" or "over limit". It basically means that what you are trying to measure is beyond the capabilities of the range you have selected.

So if you are on a 2 V voltage range and try to measure 3 V, it will show OL.

For more information, refer to the owner's manual for your DMM.

 

There is some controversy about the meaning of “OL” in the case of a DMM display.

I always understood to to mean “overload” and the manual for my Fluke meters specifically state that to be the meaning while my Siglent meter actually displays “overload” instead of OL.

 

On my Fluke meter, if the display shows O.L. it stands for OUT OF RANGE.
According to the manual.

 

I rather prefer over-limit since, to me, over-load implies that you are near some damaging value.
But that's just a nit.

 

On my Fluke meter, if the display shows O.L. it stands for OUT OF RANGE.
According to the manual.

That’s interesting because my Fluke manuals call it out as “overload”. I guess even Fluke can’t decide.

 

On my Fluke meter, if the display shows O.L. it stands for OUT OF RANGE.
According to the manual.

So then why doesn't it show O.R.?

 

So then why doesn't it show O.R.?

No Idea!, I assume it stands for Over Limit?
This displays when on the Ohms or Diode range and the leads are either open or the subject being tested is actually open.

 

So then why doesn't it show O.R.?

Tricky to make a good "R" on 7-segment displays.
As Flukes are all auto-ranging, then the only time it shows up is on the resistance range, when the resistance between the probes is too high for it to measure. I suppose it could possibly say "OC" open circuit, though to be pedantic, I suppose that there are resistances that are not "open circuit" but are too high for a Fluke to measure.

 

Back in the analog meter days, an OL condition would be displayed as a bent pointer in the best case, or a burnt meter in the worst.

 

As already stated, OL on a DMM stands for over range as well as over limit.
You cannot display the letter R on a 7-segment display.

If the DMM is set to measure Ohms, the DMM will show OL when the test probes are not connected to anything.

 

If the DMM is set to measure Ohms, the DMM will show OL when the test probes are not connected to anything.

Also on the Diode check when connected in the reverse-biased direction.

 

hi again.one more newbie question.testing mosfet. after discharging capacitance Red to D and black to S and i should see open circuit. it`s OL right ?

 

hi again.one more newbie question.testing mosfet. after discharging capacitance Red to D and black to S and i should see open circuit. it`s OL right ?

If you are talking about measuring the "resistance" of a capacitor, then you are not discharging it, you are charging it. How most ohmmeters work is by applying a voltage to the resistor and measuring the resistance (or applying a current and measuring the voltage). In either case, the capacitor will initially look like a short-circuit (0 Ω) when it is fully discharged and eventually look like an open circuit when it is charged.

 

i am talking about mosfet testing desoldered from PCB

 

i am measuring sg60n03p. and after capacitance discharged with Red on D and Black on S i see OL. after put positive to gate for a second and after that bring back to D i see 195.this in diode testing mode. is the item faulty?