Semi automatic measurements with data logging in Brymen BM869s multimeter - Page 1
Forum section: electronics / testgear

author: pascal_sweden
author_rank: Super Contributor
timestamp: May 22, 2015, 09:55:39 pm
content: Does the Brymen BM869s support similar measurement features as the Agilent U1272A?https://www.youtube.com/watch?feature=player_detailpage&v=kSmiDzbVt_U#t=1160

author: Lightages
author_rank: Unknown
timestamp: May 23, 2015, 12:06:41 am
content: The BM869s does not support internal logging. If you want to log with a BM869s then you need to connect it to a computer using the optional PC cable. If you want internal logging in a Brymen then the BM521s and BM525s do have this, but at 10000/6000 count and lower accuracy than the BM869s. The BM525s has 80000 internal record memories and can log at up to 20 times per second. You still will want a PC cable to get these records from the meter I would think.

author: nanofrog
author_rank: Super Contributor
timestamp: May 23, 2015, 02:13:11 am
content: Keysight U1252B also has internal logging, as does the Fluke 287/9 (if you need 50k counts). If not, the other Brymen'sLightagesmentioned would do, and at a lower cost.FWIW, the U1272A is more for industrial plant work than electronics.

author: pascal_sweden
author_rank: Super Contributor
timestamp: May 23, 2015, 10:39:28 am
content: Thanks for the hint about the other Brymen multimeters with built-in data logging.I read that the Sigrok framework has support for the Brymen 869s multimeter. Could be worth to look at this, if I find the time.With an easy software API on the PC, it should be straightforward to implement a nice tool for some specific repetitive measurements.BTW: Does Brymen have a multimeter with built-in Bluetooth? It would be nice if they offer a Bluetooth dongle instead of the PC cable. Does the PC cable provide isolated communication?I read about some projects to hack a Chinese multimeter and add a serial port to it for data logging.http://www.amb.org/forum/diy-hacking-multimeters-for-rs232-data-logging-output-t1210.htmlIf you combine this with a cheap Bluetooth module, you can add Bluetooth support to a 25 USD multimeterhttp://www.dx.com/p/wireless-bluetooth-rs232-ttl-transceiver-module-80711#.VWBX81K2LyYOf course you would have to open your multimeter, and that's why its an interesting project to do on a 25 USD Vichy VC97 multimeter, and not something you want to do on your 250 USD Brymen BM869s multimeter

author: Lightages
author_rank: Unknown
timestamp: May 23, 2015, 06:21:18 pm
content: No, Brymen does not have any bluetooth yet. The PC cable is optically isolated.

author: Stupid Beard
author_rank: Regular Contributor
timestamp: May 23, 2015, 07:38:28 pm
content: Quote from: pascal_sweden on May 23, 2015, 10:39:28 amIf you have a phototransistor and photodiode handy you could always hack up your own serial adapter for the Brymen meters. The adapter just slots in the back of the meter so should be quite simple to replicate. You could probably hack up a bluetooth adapter for one with relative ease that didn't require any modifications to the meter.

author: pascal_sweden
author_rank: Super Contributor
timestamp: May 24, 2015, 12:13:08 am
content: There is a lot of useful information about the Brymen 869 multimeter available at the Sigrok website.You can find there info about the chips, the data protocol, and there are also some photos of the PCB.http://sigrok.org/wiki/Brymen_BM869Enjoy!