Fluke 289 ohm drift? - Page 1
Forum section: electronics / general

author: Pablo73
author_rank: Newbie
timestamp: March 28, 2017, 12:22:13 pm
content: Hi,I'm having a problem with my new Fluke 289. Don't know if it's a real issue or i'm doing something wrong.This is the problem: In the resistance mode, when i shortcircuit the test leads the reading isn't Zero. It starts with around 20 to 25 ohm and slowly goes down but never reaches Zero. This is more noticeable in the lowest range of manual mode as well as in auto mode.I tried to zero the reading using REL mode but doesn't work because the measurement continues to drift down and never reaches a stable value. Tried differet test leads with the same result.The rest of the features of the tester works fine.Am i missing something ovbious here?Any kind of help or feedback will be much appreciated. Thanks.

author: mimmus78
author_rank: Unknown
timestamp: March 28, 2017, 12:30:10 pm
content: I think there is something wrong. It should go straight to some fraction of ohm.Inviato dal mio Nexus 6P utilizzando Tapatalk

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: March 28, 2017, 12:59:15 pm
content: https://www.eevblog.com/forum/beginners/help-with-fluke-289-please/

author: retiredcaps
author_rank: Super Contributor
timestamp: March 28, 2017, 05:32:06 pm
content: Quote from: Pablo73 on March 28, 2017, 12:22:13 pm1. Did you buy it new from an authorized Fluke dealer?2. Did you try different test leads?A working meter, regardless of brand and model number, should read close to 0.1 or 0.2 ohms when the test leads are shorted.

author: Pablo73
author_rank: Newbie
timestamp: March 28, 2017, 07:48:47 pm
content: Quote from: retiredcaps on March 28, 2017, 05:32:06 pm1. Yes, i boughted from an authorized dealer2. tried different test leads with same results

author: retiredcaps
author_rank: Super Contributor
timestamp: March 28, 2017, 08:48:18 pm
content: Quote from: Pablo73 on March 28, 2017, 07:48:47 pmTake it back to the dealer and get a replacement. It should read close to solid non fluctuating 0.1 or 0.2 ohms when the test leads are shorted.Let us know the outcome.

author: KJ-90
author_rank: Contributor
timestamp: March 29, 2017, 12:17:56 am
content: I know what is wrong with your Fluke 289. In all likelihood, it will need to have a recalibration done. Ohms readings that do not go down to zero with the leads shorted, and especially those that drift, are a sign that a recal is needed. Even though you purchased it from an authorized Fluke dealer, calibration still has a legitimate shelf life. The Fluke 289 may have been in storage for a long time before you purchased it. You need to determine the last date of calibration. If there is no cal sticker on your unit, follow the instructions in the user manual to call up the internal screen "About This DMM". It will give a date when it was last calibrated. If it is more than about two years, a recal will be needed. The authorized dealer should be happy to switch your 289 for another, or have a cal done at his cost, since it's his responsibility to sell Fluke products in new condition. Be polite and diplomatic with the Fluke authorized dealer about this. You should have no problem having him exchange your unit, or arrange for a recalibration.

author: IconicPCB
author_rank: Super Contributor
timestamp: March 29, 2017, 02:14:54 am
content: it is also possible that the connectors which are most probably soldered to the PCB may have come adrift.Short the leads with one hand and wriggle the lead ends which are plugged into the meter one at a time to see if there is a change in reading

author: Pablo73
author_rank: Newbie
timestamp: March 29, 2017, 03:02:59 am
content: Thank you all for your responses. I'll get in contact with my dealer and ask him for the calibration service since the warranty period has expired.I'll keep you posted of the outcome.

author: mimmus78
author_rank: Unknown
timestamp: March 29, 2017, 05:53:20 am
content: Calibration is not the problem. You need to ask for a repair.Inviato dal mio Nexus 6P utilizzando Tapatalk

author: retiredcaps
author_rank: Super Contributor
timestamp: March 29, 2017, 05:58:08 am
content: I don't think calibration is the problem. If the faulty meter showed a steady 2.1 ohms with probes shorted, then it could be calibration.But since it starts at 25 ohms and drifts downward over time to near 0 ohms, that doesn't sound like calibration.Fluke 289 has a minimum 10 year warranty. If you bought this new, you should have at least a 10 year warranty.

author: mimmus78
author_rank: Unknown
timestamp: March 29, 2017, 06:07:13 am
content: Quote from: retiredcaps on March 29, 2017, 05:58:08 amdeftly not a calibration problem.Inviato dal mio Nexus 6P utilizzando Tapatalk

author: Pablo73
author_rank: Newbie
timestamp: March 30, 2017, 08:56:48 pm
content: Chequed the meter info.Firmware version: 1.16/v0.88Calibration date: 04/14/2015I'll have to check with the dealer if it´s still under warranty.If i have to pay for the repair, won't be cheapThank you all for your answers

author: retiredcaps
author_rank: Super Contributor
timestamp: March 30, 2017, 09:28:46 pm
content: Quote from: Pablo73 on March 30, 2017, 08:56:48 pmAs I stated, if you purchased it from an authorized dealer, there is a minimum 10 year warranty. It is stated right inside the Fluke manual.