Did anyone get the TX pin activated?
Did anyone get the TX pin activated?
I have tried to activate the °C and the Hz+% without success: I think some hardware components are missing.
For the TX pin, on the DTM0660, it's the pin n°20 which seems not to be used on the board (not far from the 3.999 quartz, near the 01A resistor).
There are also some options bits to check in EEPROM (adresses #FAh, #FDh).
Good luck
Hi, just registered and now write my first contribution.
Yes, I have a UT210D since today! I received it drectly from China, payed 32$ = 27,78€. I'm gonna use it on motorcycle electrics, so the 2A range ist not necessary, but having 200A is nice to measure starter currents.
After a thorough check of the instrument in the next days, I promise to post some photos (inside!) here.
best rudi
Hi, just registered and now write my first contribution.
Yes, I have a UT210D since today! I received it drectly from China, payed 32$ = 27,78€. I'm gonna use it on motorcycle electrics, so the 2A range ist not necessary, but having 200A is nice to measure starter currents.
After a thorough check of the instrument in the next days, I promise to post some photos (inside!) here.
best rudi
Great news!
We can finally compare the inside of both
Could you extract and post your 24c02 content too? I think the D model is also unlockable
some doubts
...
i really dont understand wat is the dotless mode mentioned in the previous pages kindly help me out.
Ahh the millivolts also works with 10k counts ? and does it have a very high input impedence for both dc and ac ? can some one measure and let me know ? thanks.
can it be set like in V First it starts with DCV and DCmV and ACV and ACmV ? just curious thanks
...
Thanks!
When making the 400A measurement, did you notice a large residual offset afterwards (requiring de-gaussing)?
Given the increasing error I think i'll keep mine at 100A for now, but do some of the other mods.
I got my meter in March from here: https://www.amazon.co.uk/dp/B01MD14GTM/ and it came with the 1106 chipset
some doubts
...
i really dont understand wat is the dotless mode mentioned in the previous pages kindly help me out.
Ahh the millivolts also works with 10k counts ? and does it have a very high input impedence for both dc and ac ? can some one measure and let me know ? thanks.
can it be set like in V First it starts with DCV and DCmV and ACV and ACmV ? just curious thanks
...
Thanks!"Dotless" mode is the 2 A range without decimal point, so it is showing units of mA directly instead of A (e.g. 2000 instead of 2.000). The reason for using dotless is that the normal mode has a significant issue: If you use Zero then the full scale count is limited to 2000 regardless of other EEPROM settings.
For mV, there are two different type of measurement mode.
One type of mV mode has 10 MOhm input impedance, measures ###.# mV full scale, and works with the dial in a Voltage setting. So this can be combined with DCV and/or ACV.
The other type of mV has high input impedance and works only with the switch in specific positions. In this meter that is only the Resistance/Capacitance position. This mode has two ranges: ##.## mV or ###.# mV full scale.
This mV ranges are explained (in a very obfuscated and confusing way) in the chipset documentation found earlier in the thread.
Don't know if I'll have time to verify this post today regarding the resistors for the op amp, because in order to do so, I would like to verify the sensors used for the meter.
Everyone is assuming that Hall Effect sensor(s) are in play, but my initial findings so that AMR/magnetoresistive sensors are actually employed. There are 2, 4-pin, ~1.3 mm x 2.1 mm x 0.55 mm SMDs under the nubs in the fixed jaw with the package marking of 'D'. The leads are on the long sides. Using a ziplock, boiling water, and some ice-cold cold packs, I opened up the jaw to see what was what since Joe Smith doesn't want to share his high bandwidth hack.
I have 2 UT210E's, one being donated to this hacking, both with the DTM0660 controllers. The EEPROMs are stock atm and so are the meters, but hacking in SMA connectors on each and upping their bandwidth is the intent.
I digress though, as AMR/magnetoresistive sensors are Wheatstone-based sensors. Digikey shows 2 parts that are physically close match with similar "resting" resistances of ~260 ohms, the HW105A and the HW108A, with the 105 being the one that matches physical and electrical checks. I'm looking for similar/equivalent parts that are still in production to see if I can get more details specs such as identifying if they have particular qualities that would limit bandwidth. If not, then it is solely up to the OPA4330 and the circuit design that is the bandwidth limitation, yes?
Pictures will arrive when I have time to take them and have looked into the op amp channels and associated gain on all 4. Oh, one more myth to dispel, the ground/guard lead that goes into the fixed jaw, solder point 'A1' is for NCV. It is not a guard.
Thanks but still it just is kinda normal right ? we get like 1.999 amps when it was 2k counts when its 10 counts still we get 1.999 Amps right or can we even get like 5A (4.567A) in the 2A Range ? so its like a 10A Range ?
Don't know if I'll have time to verify this post today regarding the resistors for the op amp, because in order to do so, I would like to verify the sensors used for the meter.
Everyone is assuming that Hall Effect sensor(s) are in play, but my initial findings so that AMR/magnetoresistive sensors are actually employed. There are 2, 4-pin, ~1.3 mm x 2.1 mm x 0.55 mm SMDs under the nubs in the fixed jaw with the package marking of 'D'. The leads are on the long sides. Using a ziplock, boiling water, and some ice-cold cold packs, I opened up the jaw to see what was what since Joe Smith doesn't want to share his high bandwidth hack.
I have 2 UT210E's, one being donated to this hacking, both with the DTM0660 controllers. The EEPROMs are stock atm and so are the meters, but hacking in SMA connectors on each and upping their bandwidth is the intent.
I digress though, as AMR/magnetoresistive sensors are Wheatstone-based sensors. Digikey shows 2 parts that are physically close match with similar "resting" resistances of ~260 ohms, the HW105A and the HW108A, with the 105 being the one that matches physical and electrical checks. I'm looking for similar/equivalent parts that are still in production to see if I can get more details specs such as identifying if they have particular qualities that would limit bandwidth. If not, then it is solely up to the OPA4330 and the circuit design that is the bandwidth limitation, yes?
Pictures will arrive when I have time to take them and have looked into the op amp channels and associated gain on all 4. Oh, one more myth to dispel, the ground/guard lead that goes into the fixed jaw, solder point 'A1' is for NCV. It is not a guard.
Thanks but still it just is kinda normal right ? we get like 1.999 amps when it was 2k counts when its 10 counts still we get 1.999 Amps right or can we even get like 5A (4.567A) in the 2A Range ? so its like a 10A Range ?
2A range in dotless-mode will go to 9.999Amps
or with the older chip - 5.999Amps
so what is the most i can read in the 20a range ? and with how much decimal places (10k counts)
and is it possible to set the dc counts more like 15k or 20k( ) and get accuracate reading ?