Help needed DATRON 1059 - Page 1
Forum section: electronics / repair

author: Al the Pal
author_rank: Newbie
timestamp: November 17, 2019, 08:41:29 am
content: Hello everyone,is there anyone out there who has got a service and operation manual for an old DMMDatron 1059?I've been looking for such a manual all over internet and EEVBlog ofcourse.I bought the DMM on E**Y for cheap and all the leads on the test posts on he inside are not connected.Also sometimes on powerup the display fails.I would like to "allways measure voltages" but the PCB has hardly any markings on it.I just love these old instruments and would like to bring it back to life.Alex- Attachments and other options

author: Gyro
author_rank: Super Contributor
timestamp: November 17, 2019, 10:45:40 am
content: Hi,I'm pretty sure the closest you're going to find is the 1055 service manual, I uploaded one to KO4BB a few years back...http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/DatronThe main difference with the 1059 is that it has a current converter board. The rest of it should be pretty much identical - although I think the 1059 has range LEDs, I'm not sure how those are implemented.The cable from the Analogue board -often labelled DC isolator (Red Blue White) should be connected to the Volts/Ohms input terminals - Red:Hi, Blue: low, White:Guard.I can't remember what current terminals the 1059 has. The brown and blue are clearly the current shunt connections, if the current terminals are brown and blue then they should match up one-to-one. The black wire appears to be also connected to current low (blue). Thismightalso go to input Lo but I can't be sure of this.For now, I would just connect the voltage wires and leave the current converter wires safely disconnected (the current converter board is an option anyway). I can't see any sign of an ohms converter option board or an RMS (AC) converter.You will hopefully find that the main Analogue board and A/D - Display board are more or less identical to the ones on the 1051 - Datron made a lot of use of common main boards and option boards across the 104x and 105x range.Hopefully that will get you started (you're probably going to need some nuts for the terminals) and give you voltage readings.If you want to post more photos then it should be possible to see exactly what capabilities it has (apart from 5-1/2 digit resolution DC volts and current). It would be interesting anyway, I've never seen the internals of a 1059 in the flesh.EDIT: Just looking at photos from an old ebay listing, yes, Brown and Blue should go to the same coloured Current Hi and Lo terminals. I'm still not sure about the black, if it is indeed connected to the blue wire, then it probably goes to Volts/Ohms Lo. If separate then hold off.

author: Al the Pal
author_rank: Newbie
timestamp: November 22, 2019, 05:52:39 pm
content: Thx a lot Gyro.I'll take a look into these serice manuals and try to take a few hi-res pics from the pcbs.Just a little problem. The manual 1055 isn't there anymore :pYou wouldn't happend to have a fresh copy?Alex

author: Gyro
author_rank: Super Contributor
timestamp: November 22, 2019, 06:37:27 pm
content: Doh, sorry. I meant the 1051.(The 1055 is a DC-only voltmeter in a smaller case).

author: 1980s_john
author_rank: Contributor
timestamp: December 08, 2020, 02:11:53 pm
content: Hello Alex,I've just bought 3 x Datron 1059 plus a Service Manual. Yes the 1051 manual is similar, the main difference is the 1059 has a Current Converter (which you pictured). All three of mine had a shorted tantalum capacitor in the current converter, this sits between the +15V and -15V rails and a 10uF 35V part was fitted. I have some 10uF 50V parts on order, but the meter powers on with the faulty part clipped out.I can scan the manual pages for the Current Converter if wanted. I've yet to fully fix any of my units so this is work in progress.Regards,John

author: tonyalbus
author_rank: Super Contributor
timestamp: December 24, 2020, 01:42:16 pm
content: Hi, did you in the end find the service manual?i have 1059 from ebay arriving soon,i found the 1051 manual, but the 1059 would be better.if someone like to give me a link or email or PM me.Thanks in advanceTony

author: Specmaster
author_rank: Super Contributor
timestamp: December 24, 2020, 02:51:15 pm
content: I tried to download the manual from KO4BB, but I think they are having connection problems it is crawling along at 1kb second, estimated waiting time of over 30 minutes.

author: Al the Pal
author_rank: Newbie
timestamp: January 01, 2021, 05:19:13 pm
content: Hi John,i'd be pleased if u could send me a copy of that Current Converter schematic.Or even if the full Service manualIf u have the component number of those peski tantalums?Thx in advanceAlex

author: 1980s_john
author_rank: Contributor
timestamp: September 18, 2022, 02:52:09 pm
content: Hi,Is sent Alex the 1059 current converter schematic in a PM, but in case anyone else needs a copy it's here:https://www.dropbox.com/s/r6p7zk4rpg6vkoy/Datron%201059%20current%20board.pdf?dl=0Also for reference here's the Datron 1051 service manual is on the KO4BB site:http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/DatronRegards,John

author: Al the Pal
author_rank: Newbie
timestamp: September 19, 2022, 06:18:30 am
content: Thx 1980s_johnstill haven't had time to do much on the 1059.RL is a bi...Alex

author: 1980s_john
author_rank: Contributor
timestamp: May 19, 2023, 08:43:14 pm
content: Hi,Someone wanted the Datron 1059 calibration procedure from the service manual, so here it is:https://www.dropbox.com/s/1s9nlixxdxfdg6w/Datron%201059%20calibration.pdf?dl=0Enjoy,John