How to Measure Insulation Resistance With The Fluke 1587

[@waterlec8718]

This to me is the most versatile of all fluke meters with Megger, Volts AC/DC, Millivolt & Milliamp readings... Super nice.

[@brentbonnell6763]

I realised my 1587 was giving me the same readings on all my insulation tests. So i found this video and it turns out my 1587 is not sending out voltage during the tests. Less than 1vdc. No wonder i was getting 550 Mega Ohms on everything. Good video

[@ghffrsfygdhfjkjiysdz]

For those who asked or will ask about megaohm meter vs this test or why it shows the voltage instead of resistance: You measure insulation resistance by applying high voltage until you detect very small current flow. The goal is to "certify" a cable or the installation to some voltage rating. This is why the meter shows volts. In this case, while Fluke 87 should have 10M impedance, due to current leakage you can't just assume that at 1000V you will have 100micro amp current draw, so to test this fluke 1587 is raising voltage until it detects 100micro amp current draw. it detected 100 microamp current draw at 1052 volts. In regular ohm meter the ohm meter drives 10 or 100 micro amps of current and measures voltage required to get there. GOhm meters are more sensitive and can measure lower voltage drops with smaller current draw to calculate high resistance, they might only drive 1 micro-amp , this is why ohm meters do not actually test insulation at high voltages, this meter does.

[@rael5469]

I recently used a Fluke 1587 and it gave me a GOhm reading. That's better than MOhm......yes?

[@WhipHCO]

Comment above, I have the same one and it only gives me gigaohms as well. But basically 1 gigaohm is 1,000 megohms. So you can do the math so if yours says 1.7 G, then it’ll be 1700 Mg, but I still wish there was a way to switch it on the meter for G to M I’ve tried every button looked in the manual and it does not.

[@rael5469]

@@WhipHCO All of my specs say to look for greater than 10 MOhm on whatever wires I'm testing, so yeah....I'd rather just read it in Mohms.

[@sammyyourmammy8170]

these videos all leave you with questions, what does an acceptable measurement look like in Megaohms, what does a test failure look like?

[@rael5469]

How long do you need to hold the test button for a proper test?

[@lightinfintry]

common. hook the thing up to a cable not a multi meter...

[@TidalSnow1]

Could you do voltage drop checks on cars with this?

[@carpetmonk]

I need to test buried wire.. free exit and safety loops for gate operators. I understand the concept, but not the values. ideas? easy to read tables? gauge of wire, voltage applied, expected resistance, values indicative of failure.. help!

[@fluke]

+Aaron Kidd Hi there - we have a series of measurement basic training material we think will help! Here's a great place to start: bit.ly/1Vmy0AC

[@rael5469]

Wait......what is the purpose of the special probe. What are those extra contacts in the receptacle?

[@davidortiz1838]

The video is very good, with that it is shown that it injects approximately 1050Vdc in the 1000Vdc scale

[@couchpotatoe3204]

Awesome video! I'm being sarcastic! WHY did you test a meter instead of a wire?!? Fluke is so lame sometimes.

[@StephenRardon]

Is there any major difference between this tool and a MegaOhm meter used in refrigeration/HVAC?

[@mubasshiryunus2241]

Great

[@noel7777noel]

I didnt learn anything from this video. I hoped this video would settle a debate at work. This moron maintenance guy though, that reading you showed was a burned up motor. He said it should read zero. I said the volts should read zero, not 1025v.

[@vicenteprovencio5753]

This is from Fluke??? I agree with some of the comments ....lame.

[@rwizard]

This was a fairly useless video, unless you think the typical use of the 1587 is checking the input impedance of multi-meters. Surely Fluke could have come up with a few real world samples? For instance, I am wondering if there is a testing configuration comparable to the three wire setup of the Megger MIT-420. In any case, this was a poor excuse for a video titled "How to Measure Insulation Resistance". I believe the typical customer for this meter could have gotten this far without the manual or the video.

[@mahfuzahamed5520]

good

[@eldenizmirzeyev.]

fluke is first