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A look at the Uni-T UT210E

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CustomEngineerer:

--- Quote from: stj on April 10, 2018, 09:39:17 am ---no, both chips are 10,000 count, but the 0660 AC RMS calculations fail after about 7000 counts - the 1106 chip this was fixed/improved.
every function other than AC-volts can run at 10,000 on either chip.

--- End quote ---

Cool, thanks for the clarification. No issues measuring 7.000 VAC - 9.999 VAC and 70.00 VAC - 99.99 VAC after applying the DM1106 specific mods with Jay's arduino file.

Kbird:

--- Quote from: jayjr1105 on April 10, 2018, 01:31:08 pm ---
--- Quote from: stj on April 10, 2018, 09:39:17 am ---no, both chips are 10,000 count, but the 0660 AC RMS calculations fail after about 7000 counts - the 1106 chip this was fixed/improved.
every function other than AC-volts can run at 10,000 on either chip.

--- End quote ---

What if I have a meter that is the older chip but not TRMS, can I just jack it up to 10,000 count?

For example, this meter http://a.co/blshU3d

I've recently flashed it with some of the mods but stopped at 8000 count because of the AC readings bug, I didn't even realize it only affected TRMS AC readings.

--- End quote ---

That Meter looks similar to the Uni-T 139C I have , which also has the 0660 Chip , I think you have probably done everything I already did but this is the Thread for that one and my .ino

https://www.eevblog.com/forum/testgear/uni-t-ut139c-lcd-biasing-(schematics-avail)/msg1165035/#msg1165035


PS what is the Voltage regulator you are using in some of you Pics ? or did you make it ?


KB

jayjr1105:

--- Quote from: Kbird on April 11, 2018, 03:15:48 pm ---
--- Quote from: jayjr1105 on April 10, 2018, 01:31:08 pm ---
--- Quote from: stj on April 10, 2018, 09:39:17 am ---no, both chips are 10,000 count, but the 0660 AC RMS calculations fail after about 7000 counts - the 1106 chip this was fixed/improved.
every function other than AC-volts can run at 10,000 on either chip.

--- End quote ---

What if I have a meter that is the older chip but not TRMS, can I just jack it up to 10,000 count?

For example, this meter http://a.co/blshU3d

I've recently flashed it with some of the mods but stopped at 8000 count because of the AC readings bug, I didn't even realize it only affected TRMS AC readings.

--- End quote ---

That Meter looks similar to the Uni-T 139C I have , which also has the 0660 Chip , I think you have probably done everything I already did but this is the Thread for that one and my .ino

https://www.eevblog.com/forum/testgear/uni-t-ut139c-lcd-biasing-(schematics-avail)/msg1165035/#msg1165035


PS what is the Voltage regulator you are using in some of you Pics ? or did you make it ?


KB

--- End quote ---

Funny I have a 139C on the way from China as well.  It was only a couple bucks plus $13 shipping.  I used the UT210E ino file on my UTL/UEI meter.  Just changed and removed mods that don't apply.

And yes, that is my homemade variable bench power supply.  I used this instructable from GreatScott! http://www.instructables.com/id/Build-your-own-Variable-Lab-Bench-Power-Supply/

He did a youtube video on it as well.  https://youtu.be/wI-KYRdmx-E

I used a different case obviously but mostly the same layout as his.

Kbird:

Thanks Jay , I have been planning on making a Variable myself , been waiting for parts to arrive , so thanks for the link to your Build/Great Scott's build.

The Uni-T 139C was only a few bucks?  hopefully not Counterfeit , I think I paid about $35USD but that was a year ago at least..... wonder if they have the 1106 Chip too now?

I'll have to open my really old meter and see what Chip it has just for laughs....


KB.


--- Quote from: jayjr1105 on April 11, 2018, 04:39:22 pm ---

PS what is the Voltage regulator you are using in some of you Pics ? or did you make it ?


KB

--- End quote ---

Funny I have a 139C on the way from China as well.  It was only a couple bucks plus $13 shipping.  I used the UT210E ino file on my UTL/UEI meter.  Just changed and removed mods that don't apply.

And yes, that is my homemade variable bench power supply.  I used this instructable from GreatScott! http://www.instructables.com/id/Build-your-own-Variable-Lab-Bench-Power-Supply/

He did a youtube video on it as well.  https://youtu.be/wI-KYRdmx-E

I used a different case obviously but mostly the same layout as his.


[/quote]

Ultrawipf:

--- Quote from: jayjr1105 on April 09, 2018, 08:18:46 pm ---
Which chipset do you have in your 210E?

--- End quote ---

The old DTM0660.

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