My Keithley DMM7510 is screwed up detecting mains line frequency! - Page 1
Forum section: electronics / testgear

author: Dragony
author_rank: Contributor
timestamp: March 01, 2017, 06:57:38 pm
content: Hello,I have just purchased a DMM7510 but although most parts of it seems to work fine I have encountered a major problem with line frequency.I live in Switzerland and we have 50Hz.The problem is that the DMM sometimes detects 50Hz and sometimes 60Hz. Keithley decided not to allow the user to change this setting manually.Furthermore, when I click on "Line Sync" when measuring DC Voltage (Settings dialog, well hidden), the DMM crashes everytime. (Can someone confirm this?)Does someone has the same problems and has a hint how to work around this issues?

author: TAMHAN
author_rank: Frequent Contributor
timestamp: March 01, 2017, 08:39:48 pm
content: Dragony, first of all, I do not own this unit. But, reading EEVblog and also electronics and arms electronics sources quite a lot, I have not heard much good about Danahers Keithley DMM family. I can recall crashes everywhere, and them generally being finicky.Plus, Danahers repair fees become ANAL the moment you are out of warranty. If I were you, I would try my luck at chucking the thing back at Danaher and grabbing a different meter.

author: The Soulman
author_rank: Super Contributor
timestamp: March 01, 2017, 08:47:07 pm
content: If purchased new send it in under warranty.If second hand..

author: BU508A
author_rank: Super Contributor
timestamp: March 01, 2017, 08:49:18 pm
content: Quote from: Dragony on March 01, 2017, 06:57:38 pmI tested this with my DMM 7510 and it does not crash. Firmware version is 1.6.1a

author: technogeeky
author_rank: Frequent Contributor
timestamp: March 01, 2017, 08:52:34 pm
content: Quote from: TAMHAN on March 01, 2017, 08:39:48 pmI'm a little confused about this. Are the units sold by Danahers different than the regular Keithley units? I hold Keithley to be world class, and DMM7510 to be similarly so.

author: VintageNut
author_rank: Frequent Contributor
timestamp: March 02, 2017, 06:47:07 am
content: Quote from: Dragony on March 01, 2017, 06:57:38 pmI have two suggestions for you.1. Post on Tek/Keithley forum asking for help2. Contact Tek/Keithley service group in Germany

author: HighVoltage
author_rank: Super Contributor
timestamp: March 02, 2017, 09:51:14 am
content: I had plenty of problems with my Keithley DMM7510.After the problems were posted on the Tek forum, Keithley got very responsive and fixed many problems in interim FWRight now I am running FW 1.6.3c and have no problems at all.Keithley is about to release an official new FW and that should also address your problem.I tested your problem on my instrument and I do NOT have this problem at 50Hz line frequency in Germany.

author: Dragony
author_rank: Contributor
timestamp: March 03, 2017, 02:11:23 pm
content: I can't find your topic regarding your problems in the tek forum. Can you provide a link?

author: TAMHAN
author_rank: Frequent Contributor
timestamp: March 03, 2017, 03:10:28 pm
content: Quote from: technogeeky on March 01, 2017, 08:52:34 pmDanaher owns Keithley, Tek and Fluke.

author: HighVoltage
author_rank: Super Contributor
timestamp: March 03, 2017, 04:57:55 pm
content: Quote from: Dragony on March 03, 2017, 02:11:23 pmHere is where we have discussed our problems with the 7510 on eevbloghttps://www.eevblog.com/forum/testgear/keithley-dmm7510-smu-2450-2460-problems/And here on the Tek forumhttps://forum.tek.com/viewtopic.php?f=363&t=139083#p281815