Uni-T UT61E data log problem

[alin_im]

Hey guys,

I bought an UNI-T UT61E multimeter, and when I wanted to connect the multimeter to the PC it did not work. I have WIndows 10 x64. This could be the problem ?
The usb to serial adapter driver is installed, the UNI-T software 4 is installed and running in compatible mode, the port of the device is selected on PORT 1.
It works with a programed called "DMM" but not with the official one.
Any ideas ?

Alin I.

[mariush]

Use UltraDMM.

Other than this suggestion, all I can say is maybe you have a bad usb to serial adapter, from memory some don't support some parity bit feature that the uni-t software sets but it's not required, or something like that.

[alin_im]

now it is not working with none of the programs .... I really do not know what to do... the IR LED is flickering very dim, the cable is fine...i think it is a software problem

[ProBang2]

Which connection was used?

RS232-cable and extern serial to usb adapter or do you have problems with the original Uni-T usb-cable?

[alin_im]

Which connection was used?

RS232-cable and extern serial to usb adapter or do you have problems with the original Uni-T usb-cable?

I use RS232-cable and external serial to USB adapter, I did not receive a UNI-T cable to USB cable.

[alin_im]

do you think it is a hardware problem and I need to replace the item (multimeter) ?

[smithnerd]

Use your mobile phone camera to see if the IR LED on the meter is blinking.

I doubt it's the meter.

USB->RS-232 adapters are a bit hit-and-miss with the supplied UT61E cable. Some work well, some don't. The schematic shows +12V/-12V serial levels on the DE-9 port, which is unlikely on most cheap USB serial adapters.

I have 2 CH-430 based adapters here, which I bought on ebay for £1. One worked, and one didn't. I say worked, because the strain relief was inadequate and the +5V wire snapped off the PCB (I can see it through the transparent plastic).

[alin_im]

Use your mobile phone camera to see if the IR LED on the meter is blinking.

I doubt it's the meter.

USB->RS-232 adapters are a bit hit-and-miss with the supplied UT61E cable. Some work well, some don't. The schematic shows +12V/-12V serial levels on the DE-9 port, which is unlikely on most cheap USB serial adapters.

I have 2 CH-430 based adapters here, which I bought on ebay for £1. One worked, and one didn't. I say worked, because the strain relief was inadequate and the +5V wire snapped off the PCB (I can see it through the transparent plastic).

My cable is a ch-340, the blueish one. I orders the black cheap version. Hope it will work. The DMM program worked for a bit then died. The ultraDMM and stock program did not work at all.

The led was blinking but very very dim, now I had a look at it and it does not blink anymore...

If it will not work with the new cable I think I will replace the product.

[ProBang2]

Hardware problem: Yes
Replacing the multimeter: No

Probably it is a problem with the serial to usb adapter.
Not every adapter is compatible with the Uni-T software and data- protocol.

Just for testing:
I will install the Uni-T software with Win10. But I have only the usb-cable...
At least we know then, if the software and driver work with Win10.

What´s about UltraDMM? Tested?
If not, then download it from here: http://www.ultradmm.com/Download.aspx
Attached is the special patch for the UT61E with usb-connection.
 

[glicos]

Try to use a PL2303 based serial to USB converter..

[Rick Law]

USB-serial converter based on the FTDI's FT232RL works well also.

Based on writing my own (I want to log directly to disk), I found that the issue is parity.  The UT61E (v4.01) stock software insists on even-parity.  If your USB converter doesn't support parity, the stock software wont connect to it.

Try opening a regular VT terminal.  I am not sure what VT terminal Win10 is packaged with.  On Win-XP it is the Hyper Terminal.  Set the port to 19200,7,1,N.  (Stock software connects using 19200,7,1,E; but here use N for no parity)

If parity is the issue, connecting with 19200,7,1,N, you would see lines of text coming into your terminal software every 0.5 second or so.  In that line of text, you should see the reading value itself.  For example, if it is 9.876 K Ohms, you should see 9876 in the text.  The range and reading type is also represented in the text somewhere as bit codes and are not directly human-readable like the number.

If you do find parity to be the issue, you know your DMM and the PC are talking to each other.  For the stock software, will need a different USB converter that supports parity like the FT232RL chipset ones do.

[ProBang2]

Confirmed: The Uni-T-software V4.01 works with Win10.

At least with this cable: http://www.ebay.co.uk/itm/Uni-T-UT-D04-USB-Data-Cable-for-UT61-UT71-and-UT81-Series-Works-for-UT61E-/171230170056?hash=item27de1d0bc8:g:WsIAAOSweW5VZYqV

BTW: Can not find Hyper Terminal on Win10.

[mariush]

Try Tera Term : https://en.osdn.jp/projects/ttssh2/releases/