Multi Meter readings

[Guest]

, I need to check my coil but not sure if its faulty, as I'm not sure how to convert the readings..can anyone help me out here

heres what the book says




Heres a close up of the meter




here's the secondary...



Here;'s the Primery

[BassCliff]

Hi,

The dial sets the range for the display. I can't tell exactly what the range settings are but it looks like 2 - 20 - 200 - 2000 (K ohms).

If that is so, you've got 25.2K ohms on the secondary, which is good.

You have .006 ohms on the primary (almost a dead short), which is bad.


Thank you for your indulgence,

BassCliff

[Paul]

Cliff yep those are the ranges...... so as long as the range is set and it doesnt show a 1 on the left of the display the range is set correctly and no conversion is nessessary, just a simple case of reading the number?

Thanks
Paul

[rustybronco]

His scales are 2,000Ω (2KΩ), 20,000Ω (20KΩ), 200,000Ω (200KΩ) and 2,000,000 (2000KΩ)

It appears that the meter is set to read on the 2,000 Ω scale so 1,000 (1K) X .006 = ?

If the meter had a 0-20Ω scale you could read the numbers directly.

[rustybronco]

Have a look see... http://www.ehow.com/how_7525409_read...ms-ranges.html

Set the multimeter to the setting "2K" (1 Kilohms) on the dial if the component is between 1,000 Ohms and 2,000 Ohms. The digit to the left of the decimal represents whole thousands of Ohms, while the first digit to the right of the decimal represents hundreds of Ohms. The second digit to the right of the decimal represents tens of Ohms, and the third digit to the right represents single-digit Ohms.

For example...

2. = 2,000
1. =1,000
.1 =100
.01 =10
.001 =1

[Steve]

I am seeing that as .006K ohms, which is 6 ohms. A little high, but since it's at an extreme end of the scale, it's probably OK.

Even with (supposedly) accurate digital meters, it's not wise to trust the accuracy at either end of the scale.

.

[rustybronco]

And we also don't know if his DVOM has the capability of zeroing out the leads resistances.

Yes 1000 X .006 = 6

[eil]

I agree with Steve, the selector dial is pointing at K ohms, so 0.006 = 6 ohms.

BTW, if you're in the market for a high-quality yet relatively cheap multimeter that's easy to read and does auto-ranging, I've had this one for a few years and I lurve it: http://www.amazon.com/Mastech-MS8268...rds=multimeter

[BassCliff]

Hi,

Yes, looking at it again I agree. On the 2K range .006 would be 6 ohms (not 0.6 ohms), just a little higher than spec for the primary.

Please forgive my mis-perception. Carry on.


Thank you for your indulgence,

BassCliff

[Paul]

I agree with Steve, the selector dial is pointing at K ohms, so 0.006 = 6 ohms.

BTW, if you're in the market for a high-quality yet relatively cheap multimeter that's easy to read and does auto-ranging, I've had this one for a few years and I lurve it: http://www.amazon.com/Mastech-MS8268...rds=multimeter

Thanks, I've been looking at multi meters for a while, they sell the same model here in the UK, so I will be buying one.

[Paul]

Hi,

Yes, looking at it again I agree. On the 2K range .006 would be 6 ohms (not 0.6 ohms), just a little higher than spec for the primary.

Please forgive my mis-perception. Carry on.


Thank you for your indulgence,

BassCliff

Thanks again, I've ordered a new one so hopefully this will be able to eliminate one possible cause of my 250 running rich and peforming poorly

[barnbiketom]

that coil is
GOOD not bad...

[Paul]

that coil is
GOOD not bad...

the order had been placed by the time we sorted that.. no harm in keeping it as a spare (learning curve)

[barnbiketom]

Thats cool!
If you put that meter on the lowest ohms scale and hold the leads together, it 'should' read ZERO. ....

if it reads for example...1.5 then your reading will be 1.5 ohms high..

I use a Harbor freight meter and it reads almost TWO ohms with the leads shorted out!!! .. nothing to worry about if you know what's goin on!!

I'm not sure which bike you are working on, but the fuel system is always suspect for ill running conditions.

Carb to intake orings and the carb's internals !!

[Steve]

Thats cool!
If you put that meter on the lowest ohms scale and hold the leads together, it 'should' read ZERO. ....

if it reads for example...1.5 then your reading will be 1.5 ohms high.

Agreed. Also, just so you know, even calibrated meters will show a resistance when the leads are shorted together.

That will be the resistance of the leads, themselves. My Fluke is calibrated annually for work, and it will typically read 0.2 or 0.3 ohms when the leads are shorted.

.