I also have the same Siglent 6.5 digit meter and the DMMCheck Plus. I find the Siglent needs a good half hour to fully warm up and become stable. After that it is always spot on and confirmed with a similar Fluke.. Thanks for your reviews.
Hello Tony and Followers: I'm not sure I have written it on this channel, but before doing so I have to say that I admire your work a lot, and that the device is interesting, but I will comment on certain things about which I do not like. (1º) Voltage references are with respect to a calibrator only 5% of useful. (2º) When a manufacturer erases the references of the integrated circuits is no longer my confidence because it is the technique that Chinese manufacturers of little confidence and little importance are used. (3rd) The alternating tension measures must be made at a given frequency, usually 400 Hz is the measurement most used by multimeter manufacturers except for some exception. (4th) This and any tension reference have the great disadvantage of working and being effective in a single voltage range, not being useful in others regardless of the multimeter digits. (5th) Sometimes errors are made in the AC measurements, as the multimeters can not be calibrated effectively and sometimes they really measure well, but in these cases, always, the waveform in the oscilloscope has always been looked at. It is the only way to know if the wave is adequate, clean and uniform. Many bank multimeters of which I have measured with 7 ½ digits and when they measure AC become unstable, the cables I use are normally shielded (RG 58 A / U thousand is a good option) with bananas on both sides and the screen connected to Earth / Mass / Guard so that the effectiveness is good. To measure AC precisely 6 ½ it is very, very complicated with traditional tension division and rectification systems of the input wave, systems with thermal transfer or similar must be used and these despite being the best can still be Be unstable to 6 ½ digits. Your video as always 1000%, and also 100% to brands that disinterestedly send you your products to make these great videos. A hug Manuel C.V.
Friend, good afternoon! I like this calibration subject and I've been watching your videos. I don't have a bench multimeter and was wanting to buy one, now I'm in doubt. I have a used Fluke 8845A in good condition for a reasonable price, I confess I don't like used things, but maybe I don't need a 6 1/2 digits, maybe a 4 1/2 digits will break the branch. What would be better to buy a used 6 1/2 in good condition or buy a new 4 1/2. Which 4 1/2 do you recommend? Ícone "Verificada pela comunidade"
If you don't need the precision of a 6.5 then why buy an expensive, then better if 4.5 is enough ,look for a very good 4.5. Fluke Agilent or for lower budget Siglent. (the Owon 4.5 i have is slow)
@@TonyAlbus Thank you Tony for that info, I did also hear back from the company and that was their response as well. 100Hz and 10kHz are the most requested by engineers and 440Hz and 1 kHz by some musicians
Sorry I’m late to the picnic here… Very nice review I have seen these and went to the website. It would be nice to see a show down of all your references / standards.
I remember that Ian Johnston from UK also makes nice devices (based on LM399A). But these are more expensive (300UKP). There is also a re-calibration service for these devices for around 32UKP. Sadly not inside EU anymore..
Hello how are you !!, With the voltage reference that you showed, remember that I am looking for electrical reference standars, unfortunately in America you only see fluke which is quite expensive, searching the network I found the time electronics company from England, the bad is that I would not know where to look for reference prices to see if it is more economical or not than fluke, I really want to buy a multifunction calibrator, and I must be very sure which one to buy since they are quite expensive. Do you have any information or any recommendation that can help me?
Hello PLabs..Yes all good here, hope also on your side!. Yes i have been looking at Time Electronics to myself, it looks like they know what they are doing for sure for many years. i am a bit afraid the price is way out of my leaque, but hoping once i will have one from them here. i never looked at others before because of the price, so i am afraid i am not much help on this topic.
Transmille in the UK make better calibrators and the 1000A is about £5000. It will calibrate up to 4.5 digit multimeters but if monitored with a 6.5 digit calibrated multimeter can be used to calibrate up to 5.5 digit multimeters.
@@RB-lt8kt Thanks for your help, I thought transmille was from the USA, the truth is I want to see something from the UK and thus take advantage of visiting Europe again, I will find out more about transmille
From my conversation with singlet in my 6.5 digit when having that 6mv+ error the factory cal set it back to the factory stored calibration constants from the last calibration preformed.
I think the AC Voltage and AC current are square wave so not RMS sine wave which you need to test multimeters. The leads you used for the voltage test were not the best as the leads used during any calibration will cause small errors (can be microvolt errors) caused by temperature, types of materials that make up the leads, the croc clips and the connections on the DMM check box its self. Copper or gold connections would help reduce the errors. Normally a calibrator or multimeter would have dedicated test leads which have known errors or are calibrated with the calibrator or multimeter. The 4 wire resistance test was better than 2 wire but you still should check the short circuit of the leads as there "might" be a small milli ohm error. The construction of the DMM check isn't the best as its open to air flow across the components, especially the voltage reference. The voltage reference and other components can cause temperature coefficient errors. Also do the batteries cause a small increase in temperature when the DMM check box is turned on? What frequency were the capacitors tested at compared to the test frequency of you meter? If tested at 1 kHz and your meter uses 120 Hz there will be an additional error. Test lead error can be 20 pF or more. The DMM check box might be good enough for a 3.5 digit multimeter but not anything better. You can build a simple voltage reference with values from 10 mV to 100 V DC and an AC voltage (sine wave) at 40 Hz to 20 kHz covering the same voltage range. DC & AC current as well as resistance, capacitance can be added. The better option would be to have a calibrated meter (6.5 digit) and use this as your reference connecting the meter under test in parallel at the 6.5 digit meters terminals with good quality leads. AC test leads and when testing high resistance values you can use a coax lead with good quality 4mm plugs on.
They ask you for a fair review? Haha Well they won’t get a more fare reviewer than Tony! As always great video! That is a bummer about calibration! If it did revert Siglent should not make it that easy! Let us know hope this is not the case!
Thank you Brad! Yes will ask Siglent, and if it did not revert its need calibration, the values somehow feels are different from before when i just had it.
That is a bit outside my interest, so i never looked for it, but maybe you can find something on ebay. But this Siglent SDM3065X-SC does have a scannercard and it can mesuere temp with the right sensor.
You are right to doubt of Siglent 3065X. Until the Keythley(DMM6500) has arrived on my bench, I was pretty sure about it. But I have found + 680 uV DC as against Keythley. Fluke 289 is also with Keythley on DC. Great review, keep up with this!!!
![เปิดบ้าน นาราเครปกระเทย 1 ไร่ ขายขาดทุนหลัก10ล้าน เอามาใช้หนี้!!! l [Nickynachat]](http://i.ytimg.com/vi/0jz84VFWVP4/mqdefault.jpg)
Thorough review as always, and enjoy your upbeat attitude! Many thanks.
Thank you kindly!
A very nice review Tony. Seems your meters are quite acceptable and within tolerance. A nice piece of equipment for DMM calibration... 10/10
Thank you Dero, yes i am amazed too about the old Keithley, still going strong, and that calibrator is better then the chinese i tried before
I also have the same Siglent 6.5 digit meter and the DMMCheck Plus. I find the Siglent needs a good half hour to fully warm up and become stable. After that it is always spot on and confirmed with a similar Fluke.. Thanks for your reviews.
Yes both are very good. my problem is that i can not get the temprature stable in my attic and it gets hotter and hotter.
Hello Tony and Followers: I'm not sure I have written it on this channel, but before doing so I have to say that I admire your work a lot, and that the device is interesting, but I will comment on certain things about which I do not like. (1º) Voltage references are with respect to a calibrator only 5% of useful. (2º) When a manufacturer erases the references of the integrated circuits is no longer my confidence because it is the technique that Chinese manufacturers of little confidence and little importance are used. (3rd) The alternating tension measures must be made at a given frequency, usually 400 Hz is the measurement most used by multimeter manufacturers except for some exception. (4th) This and any tension reference have the great disadvantage of working and being effective in a single voltage range, not being useful in others regardless of the multimeter digits. (5th) Sometimes errors are made in the AC measurements, as the multimeters can not be calibrated effectively and sometimes they really measure well, but in these cases, always, the waveform in the oscilloscope has always been looked at. It is the only way to know if the wave is adequate, clean and uniform. Many bank multimeters of which I have measured with 7 ½ digits and when they measure AC become unstable, the cables I use are normally shielded (RG 58 A / U thousand is a good option) with bananas on both sides and the screen connected to Earth / Mass / Guard so that the effectiveness is good. To measure AC precisely 6 ½ it is very, very complicated with traditional tension division and rectification systems of the input wave, systems with thermal transfer or similar must be used and these despite being the best can still be Be unstable to 6 ½ digits. Your video as always 1000%, and also 100% to brands that disinterestedly send you your products to make these great videos. A hug Manuel C.V.
Thank you Manuel!, yes you are correct on all, real calibrators are different. but also cost 20K or more.. may once i will have one :)
Looks a lot better and more useful than the others. Seems like a decent bit of kit :)
Hello Stephen, yes much better then the Chinese and a proper calibration on 8.5 DMM :)
Friend, good afternoon!
I like this calibration subject and I've been watching your videos.
I don't have a bench multimeter and was wanting to buy one, now I'm in doubt.
I have a used Fluke 8845A in good condition for a reasonable price, I confess I don't like used things, but maybe I don't need a 6 1/2 digits, maybe a 4 1/2 digits will break the branch.
What would be better to buy a used 6 1/2 in good condition or buy a new 4 1/2.
Which 4 1/2 do you recommend?
Ícone "Verificada pela comunidade"
If you don't need the precision of a 6.5 then why buy an expensive, then better if 4.5 is enough ,look for a very good 4.5. Fluke Agilent or for lower budget Siglent. (the Owon 4.5 i have is slow)
On the DMM check plus dual frequency option, what are the 2 most useful frequency options to select for general purpose use?
Hi Bruce, i think that would be 100Hz and the 10KHz.
@@TonyAlbus Thank you Tony for that info, I did also hear back from the company and that was their response as well. 100Hz and 10kHz are the most requested by engineers and 440Hz and 1 kHz by some musicians
Sorry I’m late to the picnic here… Very nice review I have seen these and went to the website. It would be nice to see a show down of all your references / standards.
Hello Mark! that is a nice idea. Thanks
Just ordered one of these! cost about $231USD fully loaded and delivered. Not to bad for what it is, now I can calibrate the rest of my equipment.
Thats great, better pick then those chinese , it is indeed very versetile i like it!.
I remember that Ian Johnston from UK also makes nice devices (based on LM399A). But these are more expensive (300UKP). There is also a re-calibration service for these devices for around 32UKP. Sadly not inside EU anymore..
Yes that device looked very interesting, i tried contacting him, but i guess he is busy.
Hello how are you !!, With the voltage reference that you showed, remember that I am looking for electrical reference standars, unfortunately in America you only see fluke which is quite expensive, searching the network I found the time electronics company from England, the bad is that I would not know where to look for reference prices to see if it is more economical or not than fluke, I really want to buy a multifunction calibrator, and I must be very sure which one to buy since they are quite expensive. Do you have any information or any recommendation that can help me?
Hello PLabs..Yes all good here, hope also on your side!. Yes i have been looking at Time Electronics to myself, it looks like they know what they are doing for sure for many years. i am a bit afraid the price is way out of my leaque, but hoping once i will have one from them here.
i never looked at others before because of the price, so i am afraid i am not much help on this topic.
Transmille in the UK make better calibrators and the 1000A is about £5000. It will calibrate up to 4.5 digit multimeters but if monitored with a 6.5 digit calibrated multimeter can be used to calibrate up to 5.5 digit multimeters.
@@RB-lt8kt Thanks for your help, I thought transmille was from the USA, the truth is I want to see something from the UK and thus take advantage of visiting Europe again, I will find out more about transmille
@@RB-lt8kt Thank, will have a look
From my conversation with singlet in my 6.5 digit when having that 6mv+ error the factory cal set it back to the factory stored calibration constants from the last calibration preformed.
Thank you! that is good to know, i feel a bit better now. i sub also to your channel.
@@TonyAlbus thanks for the sub. The replacement 6.5 has been rock stable let it burn in for a couple weeks.
@@Rhine_Labs Great!! nice to hear....
I think the AC Voltage and AC current are square wave so not RMS sine wave which you need to test multimeters. The leads you used for the voltage test were not the best as the leads used during any calibration will cause small errors (can be microvolt errors) caused by temperature, types of materials that make up the leads, the croc clips and the connections on the DMM check box its self. Copper or gold connections would help reduce the errors. Normally a calibrator or multimeter would have dedicated test leads which have known errors or are calibrated with the calibrator or multimeter. The 4 wire resistance test was better than 2 wire but you still should check the short circuit of the leads as there "might" be a small milli ohm error. The construction of the DMM check isn't the best as its open to air flow across the components, especially the voltage reference. The voltage reference and other components can cause temperature coefficient errors.
Also do the batteries cause a small increase in temperature when the DMM check box is turned on?
What frequency were the capacitors tested at compared to the test frequency of you meter? If tested at 1 kHz and your meter uses 120 Hz there will be an additional error.
Test lead error can be 20 pF or more.
The DMM check box might be good enough for a 3.5 digit multimeter but not anything better. You can build a simple voltage reference with values from 10 mV to 100 V DC and an AC voltage (sine wave) at 40 Hz to 20 kHz covering the same voltage range. DC & AC current as well as resistance, capacitance can be added.
The better option would be to have a calibrated meter (6.5 digit) and use this as your reference connecting the meter under test in parallel at the 6.5 digit meters terminals with good quality leads.
AC test leads and when testing high resistance values you can use a coax lead with good quality 4mm plugs on.
If you like to know the details of the DMMcheckplus, you can find that on there website, they seem very serious.
They ask you for a fair review? Haha Well they won’t get a more fare reviewer than Tony! As always great video!
That is a bummer about calibration! If it did revert Siglent should not make it that easy! Let us know hope this is not the case!
Thank you Brad! Yes will ask Siglent, and if it did not revert its need calibration, the values somehow feels are different from before when i just had it.
good.... tony,, do u know any bench top multi channel temperature monitor,,, or logger,, for cheap... no batteries
That is a bit outside my interest, so i never looked for it, but maybe you can find something on ebay.
But this Siglent SDM3065X-SC does have a scannercard and it can mesuere temp with the right sensor.
@@TonyAlbus see my vdo on owon.. cheapest i can find
@@kaybhee6 Nice meter!
@@TonyAlbus last 20 secs, dual flipping too
You are right to doubt of Siglent 3065X. Until the Keythley(DMM6500) has arrived on my bench, I was pretty sure about it. But I have found + 680 uV DC as against Keythley. Fluke 289 is also with Keythley on DC. Great review, keep up with this!!!
Thanks Robert, yes i am now thinking Keithley and Keysight are a different class. but also different price, it was expected.
Might have better if it skipped being a Jack of all trades and just made a temperature stable 5v/10v reference.
Yes a little oven would make it better, thanks for your comment.
this item has ac v,,, but does not state freq
Depending on the type of the DMMCheckPlus it can do 100Hz+10K or other values
@@TonyAlbus thanks....but what mean..when testing AC v... one does not know, if that is a sine ? 100Hz? 1khz? only amplitude...
@@kaybhee6 it is 5volt square and the frequency depends on what you have ordered.
@@TonyAlbus thanks boss,,noted
🎖🌹🎖
🙏
4.neinneinnein ! XD
:))