Products > Test Equipment
An investigation about ripple current of Kunkin KP184
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KlausF:
Can anyone help, please. I am desparately searching for a service manual or at least a schematic of the Kunkin KP184.
electr_peter:
KP182/KP184 has additional 9th key - there is cutout on front panel (covered with a sticker) and place for a button on display PCB. Does it do anything?
burkm:

--- Quote from: PaWill68 on July 20, 2021, 02:50:28 pm ---This firmware update is only for KP184 manufactured in 2019, 2020 and 2021, the model of the analog-to-digital conversion chip is AD7799. All actions are at your own peril and risk. If there are no problems, it is not recommended to update the firmware, as the changed location is not necessarily used by the user.
For questions about software bugs you can write to 64908476@qq.com

--- End quote ---

Someone should post this new firmware file as a downloadable file attachment, so other recent owners of the KP184 could use this too. Would be great, if any future firmware updates would follow this way...
Fortunately there are detailed instructions how to apply the firmware within the .ZIP file and what is needed for this. I made myself a simple rs232 loopback connector and a firmware update "activator" using some parts lying around...
Most modern PCs don't have a built-in RS232 connector any more und therefor have to use an USB->RS232 adapter.
If one is going to apply the firmware update file has to be judged by the individual user, because not everyone uses all features changed or bug-fixed. Unfortunately no info are available about the changes or bug-fixes. Although the built-in microprocessor has lots more of flash memory available this is only used to a small extent. 

@electr_peter
This seems to be reserved for a front mounting placement of the power switch instead of the power switch on the back. At least some have adapted it for this...
burkm:

--- Quote from: aristarchus on July 20, 2021, 01:59:06 pm ---Nice.
Thanks @PaWill68.
Though in my VER:04 KP184 there is no such cap C34, so I hope in VER:04 they have it solved.

Regarding the firmware update, is there any link to see it, download it and any instructions on how to upload/flash it in the KP184 ?

--- End quote ---

All needed information including the needed flash software is within the .ZIP file containing the new Firmware. Please follow it by the word (pictures are inluded also). Just check, if the RS232 extender does speak to the chip on the KP184 mainboard, or the KP will stay in the firmware-update mode ...
electr_peter:
@burkm, I have added mains switch (wired in series with transformer) on front panel on the bottom right near negative terminal. Additional button position I mentioned above is located between "ON", "->" and "SET" buttons, just left of rotary knob.
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