Why not talk about hand oscilloscopes? - Page 1
Forum section: electronics / testgear

author: erazor
author_rank: Newbie
timestamp: July 27, 2014, 06:38:07 am
content: Hi,thinking about bying a hand oscilloscope I searched this forum and saw next to nothing about such devices.There are people here who could never have enough hand multimeters, but why aren't devices like these never considered to be a reasonable add-on to a collection?Fluke 120 seriesAgilent U1600 seriesMetrix OX5000 seriesI know that they're much more expensive having lower specs than desktop models, but does this mean they're unusable?

author: zapta
author_rank: Super Contributor
timestamp: July 27, 2014, 07:39:06 am
content: You may want to check this threadhttps://www.eevblog.com/forum/testgear/tablet-oscilloscope-tbook-a-new-kind-dso/

author: rob77
author_rank: Super Contributor
timestamp: July 27, 2014, 07:51:59 am
content: those you mentioned have relatively low sampling rate (25MSa/s - 200MSa/s), so those might be handy in the field, but most of the time kind of useless on your bench. for a engineer/technician working a lot in the field it has more benefits than drawbacks - and exactly that's the target group for those scope meters.another category are the "handheld" scopes - bigger than those scope meters , but with same specs as the bench-top versions (i'm using such a scope - hantek DSO1102B).so it's up to the preference of the person - more compact scope meter with lower specs, or more bulky "handheld" with higher specs.

author: Richard Crowley
author_rank: Super Contributor
timestamp: July 27, 2014, 08:31:46 am
content: Quote from: zapta on July 27, 2014, 07:39:06 amIt seems to have disappeared. At least none of the photos(?) remain.And I don't see anything resembling a link to a website or anything???

author: tautech
author_rank: Super Contributor
timestamp: July 27, 2014, 10:59:25 am
content: There are several brands of handheld scopes available and many have inbuilt DMM functionality.Add to this logging capability and trend plotting.Specs are equivalent to many bench top DSO's.Siglent has 2 model ranges with bandwidths from 60-200 MHz, 1GSa/s sampling and 2M memory depth.http://www.siglent.com/en/product/list4.aspx?nodecode=119008004

author: CosPhi
author_rank: Regular Contributor
timestamp: July 27, 2014, 12:50:16 pm
content: I have an Siglen SHS 1062 Handheld scope. I mostly use it with a current clamp to check motor starts and motor regulations.First I would also buy an C.A. OX 5020 because it can measure electric power, PF, single and three phase. I had it once in my hand and it feels really good. On the downsize it has just 10k memory depth and has a pretty small screen.So I went to a Siglent SHS 1062 with 2M memory. But ... I does not really work when you set it to long memory. When you zoom in after you stopped the scope you get wrong timebases and strange shapes. 100% uselessThe digital filter also just works as long the scope run. When you push the stop button you get the just raw waveshape not the nicely filteredAlso a problem with the scope is when you set the up the scope turn it of and on again later, it change sometimes one or two setup points. So you have to check all chanel, trigger and aquire menus again. I never ever used the multimeter on it, so no information about that. Just for change the fuse on the mA range you would have to crack the warranty sealWhen you use it just in short memory mode it is still not the fastest but it works for me. Just the thing with the memory does really bother me. When motors have more than about 20 seconds to start up, you run out of memory in scope mode. It would possible to do it just in recorder mode, but then you have no trigger and so on.An positive point are the probes (even they are a bit short). They are the same you get on a Fluke, C.A. or Agilent Handheld scope. The Fluke and Agilent have "there" company name on it but they are from MultiContact. So you can easy get other 1x, 10x, 100x probes and on all match the same additional crocodile clips and so on. For example I have an Agilent 1x probe from the 1600 series but the probe crocodile clamp are Fluke labeled. But it does match perfect to all my probes.Also an positive point are the battery life. I used it over three hours and it had still energy on the battery left so at least 4-5 hours are possible.The Fluke 123 is not bad I guess. I just used it short a pretty while ago. But can't measure power unlike the C.A. OX5000. About the Agilent 1600 ... there is just rarely information about it. I searched a lot last year. It is not an "inhouse" Agilent product.The new Micsig scopes are also on the market now. The specs are really good on paper but ... who knows.https://secure1.bluecentral.com/emona/shop/scripts/prodList.asp?idCategory=97The new Hantek seems also pretty rugged. A short while ago was an video here from the new scopes. He took the scope under the shower ... it kept running ... but I guess there is not an rugged isolated version yet.https://www.eevblog.com/forum/testgear/hantek-dso1000e-dso8000e-handhelds-teardown-and-ip51-test/msg475863/#msg475863-If you like electric power with the scope the OX would be your scope (or another much more expensive scope).-The Fluke 123 has not isolated chanels.I'm still waiting for a software update for my SHS1062. But at moment I don't would buy an Siglent again. Special not when you expect 2M memory... hope it helped a bit.

author: tautech
author_rank: Super Contributor
timestamp: July 27, 2014, 08:03:02 pm
content: @ CosPhire your SHS1062There is a thread with similar problems as you describe with a link to the then latest firmware.https://www.eevblog.com/forum/testgear/siglent-shs806-record-problems/msg313688/#msg313688If this does not resolve your problem, Siglent contact details in this post:https://www.eevblog.com/forum/testgear/siglent-technical-support-join-in-eevblog/msg400357/#msg400357

author: CosPhi
author_rank: Regular Contributor
timestamp: July 27, 2014, 09:35:28 pm
content: Thanks for the answer.I checked a few weeks ago the firmware on Siglents website, and then I had the same version like they had on there website. I don't have the scope here to check it right now again, but I think I have the actual version.On the other tread they talked about problems with the trend plot and recorder mode. In my first firmware version it was also not really useable but with the actual firmware it is better now and it works. The only problem in the multimeter logging mode is after a while with a lot datapoints it becomes very slow. I think it is because they redraw always all datapoints, instead of just add one pixel on the end.There are also different firmwares for the SHS1000 and SHS800 scopes. I guess I make a list with all things and send it to Siglent and wait what they will say.