Electrical knowledge may help please !!!

[Grandad]

Hi my dad game me a circuit tester today and was wondering if i could use it to check the resistance (ohms) of my microcoils before i had to rebuild the base with coil to be able to check my ohms.

My questions please

If i put the pos and neg on each leg of the microcoil will it give me the correct reeding ?

Ive put up a pic where would i put the pos and neg leads ?

And where would be the correct position for the dial to be in ?

Sorry but electrics is not my strong point and didnt just want to bin it if it could be used

Grandad

[Greg]

Black lead in the com terminal and red lead in VOma terminal.
Set the meter to 200 at 6 o'clock position.
You could also try it one click to the right on the diode symbol in the red box.

[seniorphil]

As Greg says...
But, meters have an internal resistance. If you touch both leads together you should get a reading(about 0.2 ohms). This reading should then be deducted from whatever reading you get on an atty to get an accurate measure.

[Grandad]

Thankyou Greg seniorphil You are stars, Im off to the garage to play

[djs]

Like mine..

I have about 0.9-1.0 ohm touching the probes (which seems a little bit much....but there you go....can't expect perfection for £2.99)

I tend to build the head, shove one lead/probe in the tiny air hole and touch the other anywhere (more or less) on the atomizer base.

[spikus]

I measure the coil resistance between the two screws .... Is that not right ?..... I'm not interested in the internal resistance of the battery or mod or meter..... Do I need to do something different ?

[seniorphil]

Apr 16, 2014 19:56:21 GMT spikus said:

I measure the coil resistance between the two screws .... Is that not right ?..... I'm not interested in the internal resistance of the battery or mod or meter..... Do I need to do something different ?

Wherever you measure the resistance from you still need to deduct the meters resistance, or the reading is meaningless. Your just testing for a complete circuit.
I do the same as @djs to get the resistance of the whole atty.

[Greg]

Apr 16, 2014 19:56:21 GMT spikus said:

I measure the coil resistance between the two screws .... Is that not right ?..... I'm not interested in the internal resistance of the battery or mod or meter..... Do I need to do something different ?

Between screws is fine but the OP asks to check coil before fitting to base.
you should be interested in the meter resistance though. If your mater leads measure 1 ohm when shorted like djs said and you then measured your coil at say 1.2 ohm between your base screws then the coil is only 0.2 ohms.

[spikus]

Don't meters compensate for their own resistance / leads etc ?

[Super-Shiny]

I hate multimeter's, i get lost just looking at it, all i know is beep sound means you have a connection

[Perpetua]

Straightforward video tutorial here Grandad . . . or alternatively buy a device which does it for you, my preferred choice personally.

[ronaldo]

Apr 16, 2014 20:32:40 GMT spikus said:

Don't meters compensate for their own resistance / leads etc ?

no but you can buy higher quality leads to be more accurate but it would then be cheaper to buy a coil tester

[Greg]

Apr 16, 2014 20:32:40 GMT spikus said:

Don't meters compensate for their own resistance / leads etc ?

Afraid not, try it with yours 
If you have a decent meter with good quality leads you get get as low as 0.1 ohm but you may also get a lot higher.

[seniorphil]

Apr 16, 2014 20:32:40 GMT spikus said:

Don't meters compensate for their own resistance / leads etc ?

Only if you pay a lot for them. You'd think they would have it sorted by now. I use 6 different meters so it's a habit checking.

[spikus]

Just checked mine ... It reads 0.1 ohms with two probes touching .... I'm happy to live with deducting that from coil readings ..