Rohde & Schwarz UDL 45 Digital Multimeter - need help to find schematics...

[carl_lab]

Can somebody help me to find schematics for a Rohde & Schwarz UDL 45 Digital Multimeter?

I've used google search, but this multimeter seems to be non-existent at the web...

[coromonadalix]

The only one ive found is the model 44 pictures, nothing else ??   does your has some ressemblance ??

[carl_lab]

The 45 is completely different to the 44:

[tmlab]

Take a look at this thread:
https://www.eevblog.com/forum/testgear/analogic-data-precision-dp100-5-5-digit-mulimeter/

It's from another brand but it's the same as your

[carl_lab]

Thank you, this one looks nearly identical.

Can anybody explain how to reassemble multi-part archive files from
http://www.eserviceinfo.com/download.php?fileid=62715

[Chris56000]

Hi!

The files are complete in themselves and only need to be downloaded from the eservice info website, then they can be printed out separately and then put together manually – unfortunately I don't think that applications that will merge the six dp100 pdf files are free!

Chris Williams

[carl_lab]

Chris, you're right, these are single PDF files...
Here's a nice, free PDF printing and manipulating tool, I'm still using for a while:
https://translate.google.de/translate?hl=de&tab=wT&sl=auto&tl=en&u=https%3A%2F%2Fwww.heise.de%2Fdownload%2Fproduct%2Fpdf24-creator-36252

[Zeitkind]

@coromonadalix
Yeah, it's an old thread, but just FYI, the Rohde und Schwarz Digital Multimeter UDL 44 is a rebranded SOAR 5430. Same or related models were also sold as Yokogawa 7541 & 7542, Panasonic / National Digital Multimeter VP-2662A and prob. some more. They do have some different options and features, also precision may vary, like mV/V ~ 0,07% to 0,04% ±2 depending on model. They were sold in the late 80s and did not cost a bargain, but nevertheless great price for what they offered. I still use the "original" SOAR 5430 on a more or less daily basis and it still bang on - which is great for a ~30 years old "24999" multimeter.
From the online database @electronicsandbooks.com, the SOAR 5430 has:

            Range                     Stability [ppm]
            Low   High   Resolution      1y
DC Volt     250m  1k     10u            400
AC Volt     250m  750    10u           5000   Max Frequency 10k
Resistance  250   250M   10m            600
DC Current  250m  10     10u           3000
AC Current  250m  10     10u           7500

It's kinda sad, that SOAR vanished later, they had great products for the price. Does anyone know why they gave up?