So I ended up buying an older geodimeter. Seller indicated it was a 4000series but the area on the tag for "model" just says "machine control". I have no idea what that means. I am just trying to determine what I have. I have books for the 4000 series and the 600 series so just not what this is.
Does anyone have any resources to determine anything by serial on these old machines?
Post a picture. Maybe somebody will recognize it.
Google "geodimeter machine control".
Seems survey grade but faster to track grading machinery.
Probably missing survey programs like cogo and traverse etc.
Machine is all cast aluminum including cu. Programs on unit when u hit prg key is P 20,22,23,40,41,43,50,51,54. UDS programs are all included.
its on the bottom
Looks like a 4400. serial number would help (small plate on underside). P1 to P19 are user definable sequences, P20 onwards are standard GDM programmes.
Well, to add to the to-do list I already have, I discovered this machine does have the battery warning on it. It runs good but not for long if I don't fix this issue. I determined that there is another battery on the radio side that I believe is rechargeable and designed to carry some of the memory. It is sitting at 8V so I think it is a series wired 3.6V double pack of NiCAD most likely.
However, I checked the control side and found a duplex of 3V button cells. I really figured they were either in parallel or series but one test low and the other brand new. If they were in parallel, they would test the same, and if in series, I would be able to test the doubled voltage from them. It almost seems like they are powering separate areas of the board? I have not dug in further as I will have to make a dedicated investigation on the board.
Any idea what is going on with the battery configuration here? I remember some talk that if they have two batteries, you could swap them one at a time without issue but I need to find out more. I guess it is possible that each battery is maintaining separate circuits but with the one battery voltage being so low, I suspect it is too low to maintain any chips. Most will handle down to 1.5V but I am well below that.