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Welcome, Guest. Please login or register. Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search. Read times. At this point, it's pretty much 3 options I can see based on really 1 need: 5.

I was at first thinking an Fluke a, but they only do volts and ohms, no current. Seems the biggest difference is the displays. At this point I'm leaning heavily toward the Keithley. The HP display seems like it just sucks unless you hack it for a backlight.

Can anyone enlighten as to the repairability of any of these? I think I've found Service Manuals for them all the Keithley and Fluke both have their service manuals included in the instruction manual, I'm not sure about the HP.

The Keithley is actually the most recent of the 3 as both the Fluke and HP seem to have been mid-eighties to early nineties models. And at least the Keithley provides front panel or remote calibration. Are there others to consider? Are there any showstoppers? I also don't overly like the whole battery backed calibration data on the HPs. I get the impression the Fluke and Keithley both store this info in some type of non-volatile way?

Are you serious? In what condition are they or do you expect them to be for that price? Metrology Meeting is canceled. Looking forward for MM Note that current ranges are somewhat limited: the Fluke is limited to one 2 A range, the HP a only has one 3 A range, the HP A has a mA and a 3 A range, and the Keithley has the oddball combination of 30 mA and 3 A best current resolution of these models.

On the other hand, an a in similar condition is usually a bit more expensive than the less popular Keithley The huge LED display on the Keithley is very nice in my opinion. The rebadged Keithley was quite terrible, but all designs up to the 20xx series eg.

The Keithley uses non-volatile storage for calibration constants it's the newest of these models. Not sure about the Fluke, should be in the service manual.

The Keithley is late eighties introduced in , the a in and the a a few years later. Not sure about the Fluke. I'm quite sure all meters in this list support front panel calibration. I know it for a fact on the Keithley and HP a, since I actually adjusted these. Quote from: alm on June 10, , pm. I have no complaints about the Keithleys. One of them has a scanner option, I've never used it. It's a relay card that allows the meter to measure 10? Something often used for system applications.

I imagine you could use it for some monitoring applications, but I just tend to throw more meters at the problem. I think the other meter defaults to auto ranging, so it may be something you can change. They area as well 5. I don't want to be human! I want to see gamma rays, I want to hear X-rays, and I want to smell dark matter I want to reach out with something other than these prehensile paws and feel the solar wind of a supernova flowing over me.

Huh, the Yokogawa's seem interesting. They take a memory card! The RS would be preferable Quote from: branadic on June 10, , pm. Quote from: bingo on June 11, , pm. Quote from: staze on June 11, , pm. Sad if that's the case Smokey Super Contributor Posts: Country:. Quote from: staze on June 10, , pm. That pretty much explains Tek recently. At least they're trying to refocus on what they're good at My only problem with the older Keithley's is the color scheme.

The 70's called, and they want their color schemes back Anyway, I purchased a meter. Once I have it, and know it works, I'll post back with details. Since the Keithley was mentioned in this thread.. I have a question.. The seller says that the Ohms and Volts display is always 0. Seems like an easy fix?? I had a look at the schematic, there is a whole lot of FETS being used on the input circuit, some as low leakage protection diodes, others as switches I just wonder if these FETS are a selected for their characteristics and b unobtanium now Thanks for any guidance.

Quote from: codeboy2k on June 11, , pm. Could also be a calibration issue. I had one meter that always read 0 V on one ACV range. Turned out the cal constant was just zero for that particular range, probably due to someone using the same voltage for the first and second point. A calibration with a known AC voltage fixed it.

This would explain the hard 0. My other suspicion would be a short in the input circuit, since an open would result in noisy readings on the lower ranges. It just seems like it could be an easy fix no matter what.. Yes, the seller has more than 1 available, hard to believe they are all in the same condition though, i. I'd like to hear your results when you get it.

Quote from: codeboy2k on June 12, , pm. Great thanks! If it's just a calibration issue as alm says, or possibly just some settings Good: powers up fine, and displays.

Bad: none of the measurements work. Did a reset, no change. So I'm guessing it's something with references, transformer output, or something along those lines. Sadly, none of the components are labeled on the board I'm guessing once we get one of these squared away, they'll all be the same issue. Question for Alm: Do you ever get any relays that audibly click I don't get anything. Not with the scanner either. The relays in the click, but they are very quiet: a quite high pitched click which is barely audible over the sound of the button click.

Nothing like the chatter of some other meters. You only hear them when opening, not closing. Yes, often no silkscreen on equipment from this era.

You get used to identifying parts from the parts location diagram. So no current measurement either. Not what the seller described. Quote from: alm on June 15, , am. There was an error while thanking. SMF 2. EEVblog on Youtube.


Keithley 199 Instruction Manual

Welcome, Guest. Please login or register. Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search. Read times. At this point, it's pretty much 3 options I can see based on really 1 need: 5.


Keithley 199 Manual



Keithley 199 System DMM Scanner



Keithley 199 Manuals


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