Question with atty OHM test

[seven]

I just opened a new 510 atty standard not high voltage and I am pretty sure i have the settings on the multimeter correct, but can anyone else confirm that the standard 510 atty is 4.8 ohm? I read its supposed to be 3.5-4.2 mine reads 4.8 unless i have it on the wrong setting. My multimeter is from harborfreight brand is centech.

 

[Cisco]

Should be 2.4ohm +/- .1

Put a new battery in the meter and recheck, keep your fingers off the contacts, check the ohm reading when touching the probes together, could be some resistance in the meter itself, if there is deduct it from the total reading off of the atty.

If it still comes up 4.8ohms vape it on 2 3.7v cells or throw it out.....

Cisco...

 

[MHR7331]

No fingers! LOL...

 

[seven]

ty cisco- haha ok no fingers when i test it again. it was hard to take a pic holding my camera phone, and the probes.

 

[MHR7331]

ty cisco- haha ok no fingers when i test it again. it was hard to take a pic holding my camera phone, and the probes.

Yeah, meter probes can be very touchy... I have a decent Fluke and it'll give bizarre readings with so much as a nudge with a thumb...

 

[Drewsworld]

You also want to test the internal resistance of your meter and subtract that from your calculations...Touch the probes together and that will tell you the internal resistance of your meter...Its probably minimal but still worth calculating...
Drew

 

[bassnut]

My 510 attys are reading about 6.5 ohms on my 200 ohm MM setting. Seems high.
I've ordered 4 x 1.5 ohms attys. I've heard they burn out quickly. I'll report back.

 

[BadState]

I'm guessing that since your dial is pointing at "200" you have to divide by two, which makes the reading 2.4, which is what my Joye attys read.

 

[WillyB]

I'm guessing that since your dial is pointing at "200" you have to divide by two, which makes the reading 2.4, which is what my Joye attys read.

'200' is the lowest setting on that meter and is where it should be set, no dividing is needed. As was mentioned any 'probes only' reading should be subtracted.

My Joye atties are usually 2.1-2.3Ω. The semi clones are always higher.

 

[Scottbee]

Unless you're made of iron.. fingers on the probes when doing an atty Ohm test will have no effect (relatively speaking).

You've either got a bad (non-Joye, defective, or HV) atty, or a problem with the meter calibration.

 

[Rocketman]

Actually the $2.99 HarborFreight meter is probably working just fine. The ohm measuring point in a two wire measurement system is inside the meter. The range switch may induce some "unexplained" resistance hooking the ohm current source to the voltage test jack but it really doesn't matter because you WILL have lead resistance anyway.

Slowly rotate the range switch, click, click, click, about 3 full turns (SLOWLY) to clean internal contacts that have been sitting unused for the past 3 years. Plug the test leads in just like you have them, them unplug, them re-plug, etc. to clean the test jack. Turn the meter on and touch the two probe tips together and hold (you have the meter set up just fine in the photo) until the reading stabilizes, or ALMOST stabilizes. This is the "2 wire resistance" of your test setup. The HarborFreight test leads have a surprisingly high resistance just by themselves.

Subtract this from your atty resistance measurement.

Rocket

 

[JoeMoto]

I have that same meter, although it's 2 years old, and it "zeros" on that setting at .9 ohms. Just subtract your "zero" value from the reading and that's the actual value.

It was only $3, so you get what you pay for.

So yeah, what Rocketman said.

 

[kwcharlie]

Unless you're made of iron.. fingers on the probes when doing an atty Ohm test will have no effect (relatively speaking).

You've either got a bad (non-Joye, defective, or HV) atty, or a problem with the meter calibration.

And make sure it's been an hour since you have eaten anything salty if you are going to touch the probes while measuring low ohms. i avoid pickles for 24 hours before using my meter or make sure I’ve brought my body resistance back up with alcohol.

Seriously Seven how does it vape?