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Need Windows USB Driver for TENMA 72-13210 (electronic dc-load 30A/120V 300W)

simonwahlmann

Dear all,

does anyone has an idea where to find the "windows usb-driver" for this device?

 

     TENMA 72-13210 (electronic dc-load 30A/120V 300W)

 

It's not present on the attached original CD and I also couldn't find it anywhere in the internet.

 

Thanks for your support!!!

 

UPDATE 17th of Sep. 2018

Thanks for your replies so far!!!

 

The device is listed twice at "other devices" when I plug in the usb-port:

     - SZ KORAD USB Mode

    -  SZ KORAD USB Mode

 

With a CD no driver but a list of commands to control the device is provided.

There is also a Windows executable for a connection test. Its frontend shows three tabs, one for each communication port

     - Ethernet

     - RS232

     - USB

The USB obviously didn't work, because the devices had no drivers installed.

Using an rs232 to usb adapter I was able to control the device via the RS232 port. The device was then listed as "USB Serial Port (COM11)" with an FTDI driver being used.

This might be a workaround but I need to decide whether or not to oder more of these devices. So an inusable usb-port will influence my decission.

 

I tried out some random usb drivers ending up with an immediate system shutdown.

 

What else could I try?

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  • 0

    I've got a copy of the CD supplied with the KORAD KEL-103 (direct from KORAD support) and the 'USB driver' is under 'Software'. (Attached). Sadly, it doesn't do anything to improved the USB situation !!!

     

    I've also queried why there are 2 devices shown in the device manager and why the LAN doesn't work with the Assistant application, still waiting on feedback.

     

    Not heard anything from the 2 support chaps at Element14 that I reported the issues to yesterday and the day before! NOT IMPRESSED!

     

    Simon.

     

    UPDATE 20/09/2018 @18:47 :

     

    Hey, I discovered why the LAN discovery tool doesn't work! They discover the devices by broadcasting a UDP message with the string 'find_ka000' on port 18191.

     

    However, they use the IP address of 255.255.255.255 as the broadcast address. THIS DOES NOT WORK! They need to work out the broadcast address from the hosts IP address (your computer) and the network mask.

     

    Examples :

     

    Host IP = 10.0.0.56, Mask = 255.255.255.0 -> The broadcast address = 10.0.0.255.

    Host IP = 10.0.0.56, Mask = 255.255.0.0 -> The broadcast address = 10.0.255.255.

     

    255.255.255.255 would only work if your network mask is 0.0.0.0.

     

    The device then returns a UDP packet from each of the discovered device IP's to the host IP which contains a 48 byte long payload of...

     

    IPAddress<0x0A>MACAddress<0x0A>DevicePort<0x0A> and padded out with zeros (0x00).

     

    Example :

     

    10.0.0.200<Linefeed>7f-45-12-cd-89-a2<Linefeed>18190<Linefeed><Zeros>

     

    At least I'm half way to writing my own app to communicate over LAN :-)

     

    I'll relay this to KORAD tomorrow and see what their response is!

    Attachments:
    USB driver.zip
  • 0 in reply to sjbaxter

    The use of UDP for remote control commands seems a bit unusual and potentially unreliable (although, in reality on a non-congested network it probably will work okay). Not the best design and not something I've seen before - what a surprise!

     

    - Gough

  • 0 in reply to Gough Lui

    I agree that it is very unusual to use UDP but  I think it is the ideal protocol to support SCPI style commands.

     

    Pretty much everyone else uses TCP/IP and sockets, which is a streaming protocol and a fairly poor fit with the discrete message format of SCPI. In order to support the features of TCP/IP they frequently end up with a complex OS on an instrument with no other need for it - with all the attendant problems of maintenance and security..

     

    A really good reason for using just UDP is the simplicity possible in the test gear software - this can be used to achieve very fast performance (not relevant in this case) or very low cost of implementation (probably why used in this case) or very good stability/predictability/security of the software.

     

    It is a great shame that the Tenma PSU isn't better documented - that seems to be the biggest shortcoming and it would be so cheap an easy to put right.

     

    MK

  • 0 in reply to michaelkellett

    Its certainly easy to implement and as every command (which has no response) has a matching query (returns the set data), so its easy enough to write then query the setting to ensure its been received and set.

    I agree the documentation is a joke. Much of it doesn't make sense and the examples in the 'steps' don't reflect what you would see on the display. I've figured it all out by writing my own LAN application and 2 days playing around with the unit to work out exactly how the battery and pulse functionality works and the manual does not reflect what it does or can do!

     

    <rant>

     

    Element14 need to step up their game if they want to take a product and slap their brand on it. Documentation is useless, software does not work out of the box (unless you have Win98 or WinXP!), No USB drivers supplied and the ones that have been by support and KORAD still don't work and the lack of documentation regarding the programming is diabolical.

     

    I've essentially had to reverse engineer a brand new product in order to get it working for me! I say brand new, but it has been out as the KORAD KEL-103 since last year and passed its EMC for export back in Dec 2017 ... so its not new, its a mature product!

     

    </rant>

Reply
  • 0 in reply to michaelkellett

    Its certainly easy to implement and as every command (which has no response) has a matching query (returns the set data), so its easy enough to write then query the setting to ensure its been received and set.

    I agree the documentation is a joke. Much of it doesn't make sense and the examples in the 'steps' don't reflect what you would see on the display. I've figured it all out by writing my own LAN application and 2 days playing around with the unit to work out exactly how the battery and pulse functionality works and the manual does not reflect what it does or can do!

     

    <rant>

     

    Element14 need to step up their game if they want to take a product and slap their brand on it. Documentation is useless, software does not work out of the box (unless you have Win98 or WinXP!), No USB drivers supplied and the ones that have been by support and KORAD still don't work and the lack of documentation regarding the programming is diabolical.

     

    I've essentially had to reverse engineer a brand new product in order to get it working for me! I say brand new, but it has been out as the KORAD KEL-103 since last year and passed its EMC for export back in Dec 2017 ... so its not new, its a mature product!

     

    </rant>

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