fluke 83 delta mode - Page 1
Forum section: electronics / testgear

author: glinjik
author_rank: Regular Contributor
timestamp: November 21, 2019, 09:36:39 am
content: Hi I am new to forum so please be gentle!recently got an old fluke 83 cheap on ebay no display, quick clean of the rubber connector tings and bingo works then i noticed strange wandering resistance readings so com input was intermittent so a fix of that done that now it reads ok on resistance but when i try to rel out the leads it is will not read anything strange. although its not vital can just subtract the lead value it is a annoying any ideas peeps?

author: threephase
author_rank: Regular Contributor
timestamp: November 21, 2019, 01:48:41 pm
content: It would probably be best if you described your procedure for nulling the leads or showed some pictures.When I null the leads on my Fluke 83, it automatically switches it to a centre zero 400 ohm range, so if I try to measure anything greater than 410 Ohm, it will just show OL.The attached pictures hopefully show this better than my description.Kind regards

author: glinjik
author_rank: Regular Contributor
timestamp: November 21, 2019, 05:06:52 pm
content: hi thank you for your reply ive done some pics quite different from yours

author: threephase
author_rank: Regular Contributor
timestamp: November 21, 2019, 09:18:01 pm
content: Seems to be working fine to me, do you have a resistor of less than 400 Ohms to test with once you have switched to relative mode?Kind regards

author: glinjik
author_rank: Regular Contributor
timestamp: November 22, 2019, 06:31:03 am
content: looking at yours my bar graph is not centered after nulling leads but stuck to the right

author: glinjik
author_rank: Regular Contributor
timestamp: November 22, 2019, 06:41:44 am
content: hi so i checked with a 368ohm resister and works fine, am i right in thinking that its range is only 400oms in rel mode? if so may i be forgiven i shall hide my face in shamemaybe i should have read the manual ...but anyhow a big thankyou from me

author: threephase
author_rank: Regular Contributor
timestamp: November 22, 2019, 08:09:51 am
content: The relative mode locks the meter to its current measurement range when activated. So if the meter is in auto, then shorting the leads will set the meter to the lowest ohms range and then the relative mode works in this range.If you manually select another range say to kOhms, then short the leads and activate relative mode, the meter will stay in the kOhms range.Just for clarity, the picture on my meter screen where it is zero, the meter leads have remained shorted, are they open when your meter is reading OL?Reading the manual is an option I suppose, but never as much fun as playing around with your meter to learn, so no shame at all.Kind regards

author: glinjik
author_rank: Regular Contributor
timestamp: November 22, 2019, 10:16:45 am
content: hi yes leads are open when reads ol i have tryed mabual range reads ok on all rangers seems rel mode will not function auto mode above 400incidently still love my 79 series2 much better cap range but 83 has faster responce and nicer continuity

author: threephase
author_rank: Regular Contributor
timestamp: November 22, 2019, 12:15:17 pm
content: Sounds like it is working exactly the same as mine. Never owned a 79 series, had this 83 for nearly 30 years now, does me fine.Kind regards.

author: glinjik
author_rank: Regular Contributor
timestamp: November 22, 2019, 01:36:00 pm
content: 79 although old, cap rage is 99.99nF -9999mf 83 is 5.00nf -5.00mf 83 far superior apart from cap range heres one last question does your 83 beep in diode mode? mine wont although 79 does thanks for your patience with me

author: threephase
author_rank: Regular Contributor
timestamp: November 22, 2019, 09:58:35 pm
content: That is quite a range for capacitance, how fast is the measurement for the large capacitors on the 79? Diode mode is silent running on my 83 too.Kind regards.

author: glinjik
author_rank: Regular Contributor
timestamp: November 23, 2019, 05:58:26 am
content: Hi i dont have any really big caps here butelna lps cap 450v 150mffluke 79 shows 136,2mf took approx 7,8 secs auto range 0.9 secs manualmastech 5308 shows 131,27mf took 5.1 secselna 9840 audio quality cap 6.3v 2700mffluke 79 shows 2859 mf took 19.2 secs auto range 4.9 secs manual modemastech shows 2.59 mf took 4.8 secsso it aint bad for an old boy, you can get these old meter dirt cheap woth it jist for cap range unless you got the $$$£££ for a newer fluke..... i dream about fluke 87v but my wife would have my balls off lol