Thanks for taking the time to do a review on this meter. I purchased my Siglent SDM3055 in January of 2015. One thing I did notice is that it runs Linux inside as I was able to get a shell prompt with Telnet on my meter.
Thanks for the review. I’m purchasing this meter as soon as I finish writing this. Your review is now 5 years old so I’m hoping there has been at least a few software upgrades to address some of the minor issues you pointed out.
The effect of the measured valued creeping slowly to its final value seems to come from the active filter. I've tried it with mine SDM3055, and when I disable the filter the value immediately jumps to the correct value. The filter time constant used by the SDM3055 is fairly long (1-2 sec). While this gives stable values after a while, it also produces the effect you see.
A couple of things I noticed. You have your leads all plugged into the 10V reference. Each lead will be slightly different so connect one set of leads into the ref and to one meter then take all other leads from the first meter input sockets. Also be aware of possible input impedances and loading. Always use good quality 4mm leads and all the same make. The AC reference is a square wave so RMS meters might read differently as its not suitable. I would use individual capacitors as the switches can cause errors.
Martin, when in dual voltage/current measurement mode, it shouldn't be disconnecting the load - the relay should just be switching the ADC input from the current shunt to the precision input network.
+Greg Robinson No, it should not be disconnecting the load, but have a look at the review done by The Signal Path. He puts it on a scope and it does disconnect the load for a very brief period.
Sorry Martin, you're correct, It'd been a while since I watched Shahriar's video, I had forgotten that was the case. I can think of no good reason for the unit to operate in that manner (and lots of good reasons for it not to disconnect the load). Not sure what they were thinking!
@@gregkrobinson Wow...I was going to ask the same thing. I'm surprised they would put a relay IN LINE with the current shunt and suspected the relay was more just switching in the voltage OR the current shunt "mV" proxy. If it really is interupting the load, seems like with an active DC load, and constant current on the supply, you should be seeing all sorts of havoc/spikes/ripple (depending on how good the CC supply management and output caps are)...
You raised some good points there Martin ans pointed out some issues that need to be looked at.Its a nice looking meter with a great display and some really good features but its just far too slow I really hope they listen and that the points u raised can be sorted out.
The error message would more than likely be in Chinese. it's quite common for Chinese made software for this to happen on English system. If you want to see what it says you can change the default language for non Unicode programs to Chinese (Simplified, China) under Control Panel\Clock, Language and Region\ > Region>Administrative.
Hello. Do you think this is fast enough to measure power supply B+ during startup of tube amp? I want to measure the initial peak voltage and how it decreases and stabilizes in the first second... Thanks!
Hi Martin, when measuring voltage and current (Dual) If it is disconnecting and reconnecting the load, why is it not showing an inrush current? Is it because of passive load? Did you try with the reactive load?
Hi, nice videos about the SDM3055. I’m interested in buying a SDM3055 or a SDM3045x. Maybe someone could answer my question about the VM COMP output for automation. Is it possible to use this output for pass/fail tests? In manuals of competitors like DM3058 is an information (Page 2-56) that it only works, if external triggering is used.
![เปิดบ้าน นาราเครปกระเทย 1 ไร่ ขายขาดทุนหลัก10ล้าน เอามาใช้หนี้!!! l [Nickynachat]](http://i.ytimg.com/vi/0jz84VFWVP4/mqdefault.jpg)
![ปฏิเสธไม่ไหว (Crush on you) - LIPTA feat. No One Else [Official MV]](http://i.ytimg.com/vi/NBw1jF342vw/mqdefault.jpg)
Thanks for taking the time to do a review on this meter. I purchased my Siglent SDM3055 in January of 2015. One thing I did notice is that it runs Linux inside as I was able to get a shell prompt with Telnet on my meter.
Thanks for the review. I’m purchasing this meter as soon as I finish writing this. Your review is now 5 years old so I’m hoping there has been at least a few software upgrades to address some of the minor issues you pointed out.
The effect of the measured valued creeping slowly to its final value seems to come from the active filter. I've tried it with mine SDM3055, and when I disable the filter the value immediately jumps to the correct value.
The filter time constant used by the SDM3055 is fairly long (1-2 sec). While this gives stable values after a while, it also produces the effect you see.
A couple of things I noticed. You have your leads all plugged into the 10V reference. Each lead will be slightly different so connect one set of leads into the ref and to one meter then take all other leads from the first meter input sockets. Also be aware of possible input impedances and loading. Always use good quality 4mm leads and all the same make.
The AC reference is a square wave so RMS meters might read differently as its not suitable. I would use individual capacitors as the switches can cause errors.
Martin, when in dual voltage/current measurement mode, it shouldn't be disconnecting the load - the relay should just be switching the ADC input from the current shunt to the precision input network.
+Greg Robinson No, it should not be disconnecting the load, but have a look at the review done by The Signal Path. He puts it on a scope and it does disconnect the load for a very brief period.
Sorry Martin, you're correct, It'd been a while since I watched Shahriar's video, I had forgotten that was the case. I can think of no good reason for the unit to operate in that manner (and lots of good reasons for it not to disconnect the load). Not sure what they were thinking!
@@gregkrobinson Wow...I was going to ask the same thing. I'm surprised they would put a relay IN LINE with the current shunt and suspected the relay was more just switching in the voltage OR the current shunt "mV" proxy. If it really is interupting the load, seems like with an active DC load, and constant current on the supply, you should be seeing all sorts of havoc/spikes/ripple (depending on how good the CC supply management and output caps are)...
The interface looks pretty similar to Agilent's 34461.
You raised some good points there Martin ans pointed out some issues that need to be looked at.Its a nice looking meter with a great display and some really good features but its just far too slow I really hope they listen and that the points u raised can be sorted out.
The error message would more than likely be in Chinese. it's quite common for Chinese made software for this to happen on English system.
If you want to see what it says you can change the default language for non Unicode programs to Chinese (Simplified, China) under Control Panel\Clock, Language and Region\ > Region>Administrative.
So what would you buy today the rigol or siglent there doesn't seem to be a lot of info out for the rigol dm3058 what's your thoughts?
My Rigol DM3068 is green with envy wishing it had a similar screen! Nice 2-part review Martin, thanks! 73 - Dino KL0S
Hello. Do you think this is fast enough to measure power supply B+ during startup of tube amp? I want to measure the initial peak voltage and how it decreases and stabilizes in the first second... Thanks!
Hi Martin, when measuring voltage and current (Dual) If it is disconnecting and reconnecting the load, why is it not showing an inrush current? Is it because of passive load? Did you try with the reactive load?
Great video MJ ! 👍Will you be reviewing siglents sds1000x series oscilloscope anytime soon ? 😀
Martin, how about re-testing with the new firmware?
How about a VDO showing the downloading and instillation of the software. Just saying you had better luck doesn't help a lot.
When off is normal for the power button to blink green?
Hi, nice videos about the SDM3055. I’m interested in buying a SDM3055 or a SDM3045x. Maybe someone could answer my question about the VM COMP output for automation. Is it possible to use this output for pass/fail tests? In manuals of competitors like DM3058 is an information (Page 2-56) that it only works, if external triggering is used.
Any Word for a T4D anytime soon?
They should just make a box without the screen or controls and let the computer do the interface.
Histongrom? That's a fun spelling error.
It looks like an Agilent meter .
tiny tiny dual
First!