Brand new piece of test equipment! - Page 1
Forum section: electronics / testgear

author: dr.diesel
author_rank: Super Contributor
timestamp: January 10, 2014, 06:48:41 pm
content: Which is now my new favorite, any guesses?

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 10, 2014, 06:57:38 pm
content: I honestly can't guess, lots of nice equip, so i'll say the radio in the background.

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2014, 07:14:14 pm
content: Ole Dixie tube on the top.

author: Jon86
author_rank: Frequent Contributor
timestamp: January 10, 2014, 07:15:14 pm
content: The Sharpie?

author: dr.diesel
author_rank: Super Contributor
timestamp: January 10, 2014, 07:19:37 pm
content: Quote from: tautech on January 10, 2014, 07:14:14 pmYup! BK Precision Model 281. Do I win for the title of multimeter with the least count?Surprisingly I can't find any manuals for this thing, got an email in to BK, we'll see if they respond.

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2014, 07:26:04 pm
content: Too easy! Giveaway was the power lead not tucked away like all the others.Nice setup BTW

author: dr.diesel
author_rank: Super Contributor
timestamp: January 10, 2014, 07:26:41 pm
content: Excellent shape, looks to be from the 1972 vintage.

author: bronson
author_rank: Regular Contributor
timestamp: January 10, 2014, 08:43:21 pm
content: Ha, that's like the HP 5216A on my shelf. There's no point to ever using it other than glowy.But it's nice to have it ticking away in the periphery. Like a tiny campfire.

author: Dave
author_rank: Super Contributor
timestamp: January 11, 2014, 03:40:43 am
content: I really like the look of nixies in test equipment.Does the front panel have a clear screen in front of the nixies, or are they just exposed?

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 03:59:40 am
content: Nixie tubes are just awesome, I'm hooked, counter is next on my list.No glass or plastic cover on mine, completely open, not sure if this is original or not.

author: david77
author_rank: Frequent Contributor
timestamp: January 11, 2014, 04:20:26 am
content: Quote from: bronson on January 10, 2014, 08:43:21 pmVery true, gives a warm homely feeling to every lab.Quote from: dr.diesel on January 11, 2014, 03:59:40 amCertainly not original without any cover, I'd suspect there used to be a red or orange coloured piece of perspex. There are stingy voltages inside around the tubes, even 40 years ago they'd have tried to keep the user away from them. Besides, as with LED or VFD displays it helps readability and contrast.

author: pomonabill221
author_rank: Frequent Contributor
timestamp: January 11, 2014, 05:31:34 am
content: I think you need a few more small screwdrivers!Nice workbench!

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 03:18:40 pm
content: Quote from: david77 on January 11, 2014, 04:20:26 amYeah, one would sure think it originally would. However there is no channel or mounting for any cover, or any residue like it was simply glued/taped in etc.I can find very little for this thing, no manuals etc, so far no response from BK.

author: Lunasix
author_rank: Regular Contributor
timestamp: January 11, 2014, 05:42:00 pm
content: Precision multimeter and only 2 digits ?

author: Macbeth
author_rank: Super Contributor
timestamp: January 11, 2014, 05:52:51 pm
content: Quote from: Lunasix on January 11, 2014, 05:42:00 pmMaybe it flashes significant digits, much likeThough that seems mean for a bench meter! The watch only has so much area to make it work.

author: edavid
author_rank: Super Contributor
timestamp: January 11, 2014, 05:54:18 pm
content: Quote from: Lunasix on January 11, 2014, 05:42:00 pmTwo and a half!Heathkit had some similar ones that are fairly common (IM-1202, IM-1210).

author: Lunasix
author_rank: Regular Contributor
timestamp: January 11, 2014, 06:03:02 pm
content: We can reed 4.0V on photo (confirmed by other multimeter) and 10V range. I've seen the bulb on right, but I think it will stop display at 9.9V and not continue until 19.9V. The bulb is for overload.Right ?

author: edavid
author_rank: Super Contributor
timestamp: January 11, 2014, 06:33:14 pm
content: Quote from: Lunasix on January 11, 2014, 06:03:02 pmWrong.

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 07:04:40 pm
content: Quote from: Lunasix on January 11, 2014, 06:03:02 pmYes Sir, you are correct.

author: edavid
author_rank: Super Contributor
timestamp: January 11, 2014, 07:50:52 pm
content: Quote from: dr.diesel on January 11, 2014, 07:04:40 pmSo what happens if you apply 15V?

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 07:53:12 pm
content: Quote from: edavid on January 11, 2014, 07:50:52 pmAnything over 9.9 on the 10v scale = overload light.

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 08:01:23 pm
content: Hang on, I'm a dumb ass. That's not an overload light, it's a 1s indicator, overload is both digits flashing.(Sorry, too brief a test while assembling my new Hakko FM-206)

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 08:19:18 pm
content: This might explain it better!

author: tautech
author_rank: Super Contributor
timestamp: January 11, 2014, 08:26:38 pm
content: So accuracy has improved to 3 digits.

author: dr.diesel
author_rank: Super Contributor
timestamp: January 11, 2014, 08:31:54 pm
content: Quote from: tautech on January 11, 2014, 08:26:38 pmYes sir, now on the usable side! Pretty obvious now that i've spent 2-3 minutes playing,.

author: Unknown
author_rank: Unknown
timestamp: January 11, 2014, 08:32:54 pm
content: Quote from: tautech on January 11, 2014, 08:26:38 pmI can think of no situation where you would require any more than that anyway.

author: Jon86
author_rank: Frequent Contributor
timestamp: January 11, 2014, 08:37:12 pm
content: Quote from: Lurch on January 11, 2014, 08:32:54 pmSo you're saying you would never need more than three digits?

author: Lunasix
author_rank: Regular Contributor
timestamp: January 11, 2014, 08:57:15 pm
content: Thanks !Curious that the range is written 10V for example and you can mesure up to 19.9V. Why not write 20V for range

author: edavid
author_rank: Super Contributor
timestamp: January 11, 2014, 09:21:40 pm
content: Quote from: tautech on January 11, 2014, 08:26:38 pmTwo and a half, as I said.(And to be pedantic, that is precision, not accuracy.)

author: Dave
author_rank: Super Contributor
timestamp: January 11, 2014, 11:54:41 pm
content: Quote from: edavid on January 11, 2014, 09:21:40 pmNope, it's resolution.Precision would determine how well it can reproduce the result when given the same conditions.Accuracy tells us how close that measurement is to the actual value.

author: MadTux
author_rank: Frequent Contributor
timestamp: January 12, 2014, 12:39:29 am
content: Cool and recently wondered whether there were 2 1/2 digit multimeters while watching this video, since all I could see were 3 1/2 digit:

author: eurofox
author_rank: Unknown
timestamp: January 12, 2014, 12:48:26 am
content: Check this calibratorhttp://www.ebay.de/itm/Systron-Donner-M-106A-DCV-Calibrator-Spares-repair-/181293565665?pt=Mess_Pr%C3%BCftechnik&hash=item2a35f046e1eurofox

author: echen1024
author_rank: Super Contributor
timestamp: January 12, 2014, 02:55:08 am
content: Precision =/ Accuracy3.14 Accurate, but not precise3.887897894536748645 Precise, but not accurate3.141592653589793238 Accurate, and precise

author: peter.mitchell
author_rank: Super Contributor
timestamp: January 12, 2014, 11:42:29 am
content: Quote from: echen1024 on January 12, 2014, 02:55:08 amNo.A better explanation is this;you have a battery, across it is a 1meg resistor, the battery was charged to a perfect 5v at the beginning of each meter connectionyou connect your multimeteryou read 5 measurements, these are your readings;5.00034.99975.00044.99965.0000you connect another meteryou read 5 measurements, these are your readings;5.00145.00145.00125.00125.0013you connect another meteryou read 5 measurements, these are your readings5.003155.003125.003135.003105.00308you connect another meteryou read 5 measurements, these are your readings5.000295.000145.000035.000134.99985you connect another meteryou read 5 measurements, these are your readings5.000004.999994.999984.999974.99996The first meter is accurate, its readings are closer to the real value, so averaging will give you a closer value to the real value.The second meter is precise, its readings are relatively close to each other, meaning it will give you repeatable results, its error can be "calibrated" to give you a value closer to the real value.The third meter is of higher resolution and precise, its readings are relatively close to each other, meaning it will give you repeatable results, it's extra resolution makes it easier to detect smaller changes in value, its error can be "calibrated" to give you a value closer to the real value.The fourth meter is of higher resolution and accurate, its readings are closer to the real value, so averaging will give you a closer value to the real value, it's extra resolution makes it easier to detect smaller changes in value.The final meter is of higher resolution, accurate, and precise, its readings are very close to the actual value, they are repeatable, and it's extra resolution makes it easier to detect smaller changes in value.

author: Napalm2002
author_rank: Regular Contributor
timestamp: January 18, 2014, 04:16:50 pm
content: Did u snag that off of eBay? I have been watching obe on there and haven't made the move to buy it. Awesome score!

author: linux-works
author_rank: Super Contributor
timestamp: January 24, 2014, 08:08:41 pm
content: my latest nixie purchase:top counter just arrived today. has 1 bad digit (bad 8 on one of the tubes) but otherwise all working.(bottom 2 boxes were also recent purchases; I've been doing some home lab upgrades lately)love the blue vfd, but also have a liking to old style nixies.

author: dr.diesel
author_rank: Super Contributor
timestamp: January 24, 2014, 08:20:53 pm
content: Quote from: linux-works on January 24, 2014, 08:08:41 pmYou bastard! I love it,