EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: 001 on January 01, 2019, 09:58:07 pm

Title: DTM0660 based meters -- NEW models for 2019
Post by: 001 on January 01, 2019, 09:58:07 pm
Hi!

Any opinions?


(http://zotektools.com/wp-content/uploads/2018/04/ZT303.jpg)

(https://ae01.alicdn.com/kf/HTB1UZFSaynrK1RjSsziq6xptpXas.jpg)
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: Hydrawerk on January 02, 2019, 12:13:21 am
ZT-M1 looks very strange with some auto and some manual ranges.
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: coromonadalix on January 02, 2019, 03:05:03 am
waaaaaaaaaaayyyyyy to much ranges ???

and the 1khz    for what ??  the frequency response ??  we have meters up to 100khz now ...

the zt303 is more apealing to buy in my case
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: 001 on January 02, 2019, 07:16:38 am
Quote from: coromonadalix on January 02, 2019, 03:05:03 am
and the 1khz    for what ??  the frequency response ??   
1kHz is for RMS converter in DTM0660

Quote from: coromonadalix on January 02, 2019, 03:05:03 am
we have meters up to 100khz now ...
Keep in mind that typical DTM0660 based DMM cost is about $10-20, So it is great impruvement in basic meters world (IT KILLS 40 YEARS OLD DESIGNS LIKE DT-830 etc)  ;)


The main intrigue is how exotic models can china buid around this chip?
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: 001 on January 17, 2019, 08:56:15 pm
Nobody  cares, isnt it?  :-//
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: Felipe Lacerda on January 19, 2019, 10:02:33 pm
Quote from: 001 on January 17, 2019, 08:56:15 pm
Nobody  cares, isnt it?  :-//

o/

ZT303 appears to be the same RM219/AN870 in another case.

My question about these DMM is:

Can they replace a Uni-T UT61E?

* Ignore protective factors, 99% of my bench use is with continuity and low DC voltages.

Have a good response time / continuity? (Main factor for my use in the bench)

Does the integrated TRMS converter have superior performance? (compared to the traditional AD737)

Not having trimpot adjustments, is it a good, bad, or indifferent factor?
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: Jacon on January 20, 2019, 11:25:15 am
Quote from: Felipe Lacerda on January 19, 2019, 10:02:33 pm
ZT303 appears to be the same RM219/AN870 in another case.
+ 1
I have AN870 - quite good for my DIY use  :)
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: 001 on January 21, 2019, 12:32:28 am

Can they replace a Uni-T UT61E?- It is not so quick as UT61E
 

Have a good response time / continuity?  - Yes, buzzer is fast

Does the integrated TRMS converter have superior performance?  - it is ok up to 1kHz. It is voltage divider problem I mean

Not having trimpot adjustments, is it a good, bad, or indifferent factor? it is FAAAR better than trimpots  :-+
 
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: rsjsouza on January 21, 2019, 09:09:41 pm
With the number of divisions on the bargraph, I wonder if it is the same hack as the Surpeer AV4 - segments are grouped five by five and they update at the same rate as the measurement.

The range switch is indeed weird on the ZT-M1. At least the ZT-M0 (https://www.aliexpress.com/item/Original-Manufacturer-ZOYI-ZT-M0-ZT-M1-ZT-X-True-RMS-Digital-Multimeter-AC-DC-Voltage/32910333453.html) seems to thorougly admit its manual range nature.

If it weren't for the price, I would love to compare them to the others I have here... (I can only have so much money to spend with my hobbies).

Quote from: 001 on January 21, 2019, 12:32:28 am
Not having trimpot adjustments, is it a good, bad, or indifferent factor? it is FAAAR better than trimpots  :-+

I agree. The UT-61E is a good meter, but the trimpots tend to be its Achilles' heel if the meter is submitted to abuse or wide temperature swings. That and the always lingering possibility of a simple ESD spark kill it (as tested by joeqsmith). Otherwise it is a great meter and had been serving me very well.
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: BFX on January 21, 2019, 09:23:51 pm
001 do you have kind of disability >:D
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: Simon on January 22, 2019, 07:32:34 am
Quote from: BFX on January 21, 2019, 09:23:51 pm
001 do you have kind of disability >:D

If you talk like that you sir will be the one disabled from this forum!
Title: Re: DTM0660 based meters -- NEW models for 2019
Post by: jayjr1105 on January 23, 2019, 07:28:54 pm
Why don't we see more of the DM1106EN based ones?  It's newer and capable of more.  Maybe china just has millions of the 0660's stockpiled