Uni-T UT61E data log problem - Page 1
Forum section: electronics / testgear

author: alin_im
author_rank: Regular Contributor
timestamp: January 27, 2016, 04:20:16 pm
content: 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.

author: mariush
author_rank: Super Contributor
timestamp: January 27, 2016, 04:33:06 pm
content: 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.

author: alin_im
author_rank: Regular Contributor
timestamp: January 27, 2016, 06:44:13 pm
content: 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

author: ProBang2
author_rank: Frequent Contributor
timestamp: January 27, 2016, 07:01:51 pm
content: Which connection was used?RS232-cable and extern serial to usb adapter or do you have problems with the original Uni-T usb-cable?

author: alin_im
author_rank: Regular Contributor
timestamp: January 27, 2016, 07:03:44 pm
content: Quote from: ProBang2 on January 27, 2016, 07:01:51 pmI use RS232-cable and external serial to USB adapter, I did not receive a UNI-T cable to USB cable.

author: alin_im
author_rank: Regular Contributor
timestamp: January 27, 2016, 07:15:42 pm
content: do you think it is a hardware problem and I need to replace the item (multimeter) ?

author: smithnerd
author_rank: Regular Contributor
timestamp: January 27, 2016, 09:06:49 pm
content: 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).

author: alin_im
author_rank: Regular Contributor
timestamp: January 27, 2016, 10:21:21 pm
content: Quote from: smithnerd on January 27, 2016, 09:06:49 pmMy 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.

author: ProBang2
author_rank: Frequent Contributor
timestamp: January 27, 2016, 11:54:56 pm
content: Hardware problem: YesReplacing the multimeter: NoProbably 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.aspxAttached is the special patch for the UT61E with usb-connection.

author: glicos
author_rank: Regular Contributor
timestamp: January 28, 2016, 01:12:35 am
content: Try to use a PL2303 based serial to USB converter..

author: Rick Law
author_rank: Super Contributor
timestamp: January 28, 2016, 02:36:29 am
content: 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 to19200,7,1,N. (Stock software connects using19200,7,1,E; but here useN for no parity)If parity is the issue, connecting with19200,7,1,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.

author: ProBang2
author_rank: Frequent Contributor
timestamp: January 28, 2016, 07:37:04 am
content: 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:WsIAAOSweW5VZYqVBTW: Can not find Hyper Terminal on Win10.

author: mariush
author_rank: Super Contributor
timestamp: January 28, 2016, 07:44:28 am
content: Try Tera Term :https://en.osdn.jp/projects/ttssh2/releases/