"Analog" DMM? - Page 1
Forum section: electronics / testgear

author: Johnboy
author_rank: Regular Contributor
timestamp: March 29, 2019, 04:50:50 pm
content: I've toyed with pulling the trigger on one of these for nulls (none of my meters have a bar). After glancing at the unusual specs claimed for this thing, I suspect the movement is IC-driven. Anybody got one to confirm?Of course, I forgot to specify, sorry.https://kaito.us/tp7244.html

author: rsjsouza
author_rank: Super Contributor
timestamp: March 29, 2019, 05:49:28 pm
content: I wouldn't bet the movement is driven by a D/A converter tied to an IC.Which specs do you find unusual? Our 1960's ICE Supertester 680R had a 50µA movement and included all these functions plus frequency meter.

author: Kleinstein
author_rank: Super Contributor
timestamp: March 29, 2019, 06:04:42 pm
content: The meter looks rater conventional, including the nonlinear ohms scale. So I don't see a reason to have something digital included.There is also the option to just use an amplifier - usually a pair of JFETs at the time.I one though about a slightly digital movement with a stepper motor - but this was for large size. In cars there are sometimes such movements, that stop when power is off.

author: duak
author_rank: Super Contributor
timestamp: March 29, 2019, 06:29:37 pm
content: It's hard to say for sure, but I think I see a standard D'Arsonval movement behind the prism around the zero adjust setting. None of the specs on the meter look out of place for an analog instrument. I have both analog and digital meters on my bench. The only things I miss on the analog meters is autopolarity and autoranging.

author: rstofer
author_rank: Super Contributor
timestamp: March 29, 2019, 06:57:23 pm
content: The meter shows 20k Ohms/Volt as the input impedance on the DCV 0.1-50V scales and that is usually taken as full scale volts. 50V full scale would have 1 MOhm input impedance.I think this is an analog meter. I like it!ETA:I chased this down and it is indeed an analog meter. I like analog meters so I bought one from Amazon. I also chased down the Resistance Zero Adjust. There is a knob <somewhere> as there is on every other analog meter.

author: mqsaharan
author_rank: Regular Contributor
timestamp: March 31, 2019, 08:18:09 pm
content: Quote from: duak on March 29, 2019, 06:29:37 pmI know only of Sanwa. Some of their meters have autopolarity as an additional feature. For example EM7000 (have autopolarity on both V and mA), SH-88TR, YX-361TR. YX360TRF and SP21.https://overseas.sanwa-meter.co.jp/items/index.php?id=8There might be others from different companies, too.

author: mark03
author_rank: Frequent Contributor
timestamp: April 01, 2019, 04:00:19 pm
content: This reminds me of the advertisements that blanketed our local radio stations a number of years back, when MMDS (pay-TV over microwave link) was popular. They said it was the new thing... "wireless cable"! I honestly don't think they caught the irony

author: Old Printer
author_rank: Frequent Contributor
timestamp: April 01, 2019, 05:09:30 pm
content: Kind of like the analog scope adage that you should have if you can get one cheap...I saw a Craigslist ad by a retiring electrician for a spotless Fluke 87V and an equally nice Simpson 7-M. The 87 was listed at a fair price, but the Simpson was $20. It was a 90 mile trip each way and my wife looked at me like I was nuts. When I got there I fully expected him to say it was a typo and should have been $120, which I had in the other pocketIt was that nice, case, probes with screw on alligator clips. I still pinch myself every time i open the case to use it. Wouldn't give up my DMMs, but I really like the way a good old analog meter reacts.

author: Kleinstein
author_rank: Super Contributor
timestamp: April 01, 2019, 05:59:24 pm
content: I have once repaired analog meter with auto polarity - actually more like true RMS (with an AD RMS chip) and polarity indicators. So no switching between AC and DC, just the ranges. I don't remember the brand, but it was a little larger one for demonstration use (e.g. school).There where a few old Siemens combined analog and digital multi-meters with both an analog movement and LCD with digital readout.