Omega cn606 temperature monitor anyone work on one or access to schematic

M48z35-70pc1 I replaced from one we ordered date code 149 maybe 2022 or 2011.
No one seems to know when the last run was.
I can't figure out how to test the internal battery.from what I read inputs and outputs are shut off to retain battery life and memory.
So second thought if not the RAM is maybe some reset isn't functioning.
On the inputs it has smd jyw. Either GO or 09 on the end. I assume for input esd control.
From search cross to bav199 two diodes in series
The reference on the board is DN. What does DN stand for?
I only mention this as one JYW is in the power supply section must be a voltage divider.
This is a multi layer board so I can't follow most of the lines.
Doug

This looks like VERY old technology?, I would imagine that if the battery has gone flat, then it probably requires reprogramming?, as whatever was stored in the memory chip will have been lost. This sounds likely, as it failed after been powered down for a while.

The last I saw anything like this was back in the1980's?.

I have 2 request into omega. But most likely I won't get any tech support.
I did find software
Now I just need to know how to load in software to the omega.
Hopefully they will reply

Doug said:

I have 2 request into omega. But most likely I won't get any tech support.
I did find software

Omega Software Listing Index

software.omega.com

Now I just need to know how to load in software to the omega.
Hopefully they will reply

Click to expand...

That software appears to be the Windows interface software for accessing the data, not internal software for the units - which is VERY, VERY unlikely to be available.

I would imagine, for units that old, that tech support has long since ceased - particularly for units with batteries in, that will only have a limited life time.

Looking at the user manual, the PC software is used to fully configure the unit, setting up a config file then sending it to the device.

With the RAM lost, it may be that it just has no config and does not do anything? Possibly worth a try..

I try that next week.on leave from work.
I do greatly appreciate all information.
Maybe omega will respond.
Any other reponces will appreciated.
I find out if they don't already have a computer set up with the program if this is not a standalone
Most any tech support is not very technical.
Been reparing electronics since late 60s.
Proprietary I could hardly pronounce that word now it's daily language.

Omega reply

I would have to guess the stored configuration is there. If the memory is
large it may have held "firmware".
These were discontinued several years ago with repairs available. There may
be several sources available 3rd party after they were discontinued.
If you have programming tied up in the unit it may be worth a try.
Else we offer replacement series CN616A which looks the same and has same
functionality plus some extra features
Unit has RS485 and RS232 as well.
Program is not interchangeable though.
We offer free "Sync" program to data log and set configuration.

Doug said:

Omega reply

I would have to guess the stored configuration is there. If the memory is
large it may have held "firmware".
These were discontinued several years ago with repairs available. There may
be several sources available 3rd party after they were discontinued.
If you have programming tied up in the unit it may be worth a try.
Else we offer replacement series CN616A which looks the same and has same
functionality plus some extra features
Unit has RS485 and RS232 as well.
Program is not interchangeable though.
We offer free "Sync" program to data log and set configuration.

Click to expand...

Pretty well what you would expect for an old long obsolete unit - my issue was the huge size of the battery backed RAM - it looks more 'firmware sized' than 'settings storage' sized. However, one alternative possibility would be settings storage PLUS storing data readings for later download.