Dick, The Manuals Plus website lists several manuals for the CSC model DC200B/BR. Don't know what the differences are between the -B/BR models and the -C model, but sometimes the differences can be small; perhaps small enough for you to diagnose your problem. Go to http://www.manualsplus.com/catalog/mp_find.php and search for model DC200 and you'll see the listing. I used to work in a cal/repair lab, and saw many Fluke differential meters over the years. Aside from cleanliness problems, the most prevalent defect that I saw was the chopper in the error amp circuit. The early Flukes used a mechanical chopper, and had a limited lifetime. The later models used electro-optical choppers, eventually moving to FETs. Don't know what type of stabilization your instrument uses, but I recommend that to be the first thing you should check. Geed luck with your instrument.
Dave M masondg44 at comcast dot net One good thing about Alzheimer's; you get to meet new people every day. > Date: Sat, 6 Jun 2009 10:29:15 -0700 > From: Dick Moore <rich...@hughes.net> > Subject: [time-nuts] Need volt-nuts help > To: time-nuts@febo.com > > You all are an amazing resource, so even if this is not time-nuts > material, someone of you may be able to shed some light. > > I picked up a differential voltmeter made by Precision Measurements > Corp. It says it's brand is CSC (no info on what this stands for), > model DC 200C. In general, it is similar to a Fluke 885 but with a > much more readable meter, larger easier to use knobs, and overall > fewer parts; plus a lot more empty space. The null detector/voltmeter > section is not working, but the power supply and K-V divider are fine, > as are all the switches. > > I've checked various sites for manuals with no luck, and also Googled > and found nothing. Rather than try now to reverse engineer the > schematic, I'm hoping one of you may know something about this > machine. If nothing else it will be an interesting platform for play. > > Thx, > Dick Moore _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.