Author Topic: Fujitsu Denso EUL-75JL electronic load calibration  (Read 2345 times)

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Online ARFTopic starter

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Fujitsu Denso EUL-75JL electronic load calibration
« on: October 27, 2020, 11:25:04 am »
I bought an old (2001) electronic load EUL-75JL.
At first glance everything is fine, but the current meter has an error of about 100mA.

The current meter shows 100mA in "HI" mode without load and 0.0357A in "Low" mode.
The instrument has a calibration function and I am sure it can be corrected.
I could not find user manual or service manual.
The calibration menu has 31 items and without instructions it is impossible to understand what each particular item is responsible for.
There are no variable resistors inside, completely digital design.

Do you guys have any ideas?
 

Online ARFTopic starter

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Re: Fujitsu Denso EUL-75JL electronic load calibration
« Reply #1 on: November 07, 2020, 02:57:33 pm »
Is there no solutions?
 

Offline _Wim_

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Re: Fujitsu Denso EUL-75JL electronic load calibration
« Reply #2 on: November 08, 2020, 07:27:18 am »
If you search for http://www.access.fujitsu.com/ with the internet archive, you can find the original sites where this where sold. Together with automatic translation in your browser you might be able to find a manual.

https://web.archive.org/web/20160417234435/http://www.access.fujitsu.com/
 

Offline Madmanguruman

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Re: Fujitsu Denso EUL-75JL electronic load calibration
« Reply #3 on: January 14, 2022, 09:22:47 pm »
Better late than never. Adding this in case someone stumbles across this thread.
 
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Offline DavidKo

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Re: Fujitsu Denso EUL-75JL electronic load calibration
« Reply #4 on: January 19, 2022, 08:11:19 am »
I have tried to obtain the manual for EUL-150XL and it seems also as unobtanium. Fujitsu says Denso, Denso says they have nothing to do with it. By the search of internet archive (no pdf found) it seems that it was in Fukushima and the business was closed. I was able to find one name from internet archive in some other Fujitsu site and there was said that they no more support these products (they do another business).
 

Online ARFTopic starter

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Re: Fujitsu Denso EUL-75JL electronic load calibration
« Reply #5 on: April 05, 2023, 09:22:01 pm »
So it is, the business was sold and in 2021 I managed to find who it was sold to and get instruction.

I was able to successfully calibrate my device. It's pretty easy with the manual. I did it in 2021, but did not write back about the result.
Link to the manual, I am sure that Japanese will not confuse anyone in the digital age.
https://disk.yandex.ru/i/XTXZps8hEF4oNg

The manual is suitable for:
EUL-75JL
EUL-150JL
EUL-300JL
EUL-300JZ
EUL-75JH
EUL-150JH
EUL-300JH
 
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Offline lugaw

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Re: Fujitsu Denso EUL-75JL electronic load calibration
« Reply #6 on: November 23, 2023, 01:27:31 pm »
Thank you very much for this! I have two of this unit the 300 and 600watt version and has been searching for a manual.  I was only using the GPIB commands and can't understand how to operate the front buttons.  Now I can use the front buttons properly.
 


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