www.elektronik.si

Olaf · Objavljeno: Sre Okt 21, 2009 12:15 pm Naslov sporočila:

Kje v LJ bi se dalo to kupit?

MadMax · Objavljeno: Sre Okt 21, 2009 12:29 pm Naslov sporočila:

Si spregledal 5. prispevek v tej temi?

Olaf · Objavljeno: Sre Okt 21, 2009 1:07 pm Naslov sporočila:

Ops. Sem videl samo Frankov odgovor, daje zadeva na zalogi v Ljubljani Confused

KrEn · Objavljeno: Pon Okt 26, 2009 12:47 pm Naslov sporočila:

Kako ste zadovoljni s tem multimetrom?

Ga je smiselno kupit?
Boo hoo!

lp
Grega

bojans · Objavljeno: Pon Okt 26, 2009 6:42 pm Naslov sporočila:

Brez zamere.
Za domačo uporabo, no ja. Če dela! Beri Silvov post. Drugače pa specifikacije od 0,5% do 1,5% za digitalca so slabe. Kaj ti "nuca" 1,5V zmerit na 1 mV natančno, če pa lahko odstopa za 7,5 mV? Kar je 0,5%.
Silvo upam da je garancija "prijela".
Ko kupujete instrumente poglejte najprej specifikacije. Kaj pomeni 0,1% in "malenkost" + 20 digit.
Lahko je 0,1% od Read (odčitek) ali 0,1% od RNG (doseg).
Poceni instrument je bolj kot ne indikator.
Preden me napadete poračunajte dovoljeno merilno napako. Prepričan sem, da bo marsikdo presenečen.

ervinja · Objavljeno: Tor Okt 27, 2009 9:27 pm Naslov sporočila:

Kupil sem omenjen instrument prebral navodila in noče me delat na pc čeprav je vključeno PC-LINE ali ima kdo kakšne izkušnje.

mirkatmir · Objavljeno: Tor Okt 27, 2009 9:35 pm Naslov sporočila:

Poglej post od Silvota na prejšnji strani!

ervinja · Objavljeno: Tor Okt 27, 2009 9:36 pm Naslov sporočila:

to sem pogledal in tako naredil pa se ne poveže

mito · Objavljeno: Sre Dec 30, 2009 11:27 am Naslov sporočila:

Tudi meni ni hotela delat PC povezava. Nato sem odinštaliral program in ga ponovno inštaliral. Stvar deluje. Mislim, da se problemi pojavljajo pri izbiri porta preko katerega PC zajema podatke. Druge razlage nimam, ker mi stvar ni uspela zaradi mojega poznavanja problema, ampak zaradi nekajkratenega nalaganja ter brisanja programa in začuda je stvar zalaufala.

luftek · 2013-12-01 03.17.02.jpg

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Oživljam staro temo, ker sem izgubil kabel, ki je priložen za funkcijo PC-LINK.

Zadevo sem potem rešil tako, da sem namesto IR ledice in predupora vezal "optospojnik" (optocoupler) z 10mA vhod, ki je biu pri roki. Hotel sem ohraniti ločene mase. Sam RS232 v USB pretvornik (PL2303) sem namestil v ohišje. Je še dosti prostora. Tako se sedaj iz ohišja vidi le mini usb konektor. Zaradi tega mi sedaj ni potrebno nositi dodatnega kabla.

Imam Win 7 (32bit). Priloženi program za funkcijo PC-LINK deluje! V Naprave in tiskalniki nastavite COMx in 2400 8N1 (zadnje verjetno ni potrebno). V sami aplikaciji potem izberete nastavljeni COMx in bi moralo delovati.
Program PC-LINK in driverje lahko snamete tudi tukaj: https://www.dropbox.com/sh/e3eazj19x03ulrh/ILDuFSmmFb

heartman · Objavljeno: Ned Mar 16, 2014 4:32 pm Naslov sporočila:

Hi,
First of all, I'm sorry I don't speak your language,
I'm French, I ask my request in english in the hope you will understand it.

Luftek, can you describ better the way you hacked you multimeter
with an USB plug?
I have the same multimeter, I have the usb/IR plug but I can't use it under Win7 x64,
drivers are not recognized.
I guess with your hack I'll use finally my multimeter under win7 x64.

Regards,

aly · Objavljeno: Ned Mar 16, 2014 10:51 pm Naslov sporočila:

Hi heartman,

optical port of the multimeter is replaced with the optocoupler. You can use use almost any type because the speed is so low (2,4 kHz).

On the receiving side of the optocoupler you need an USB-to-serial converter chip, for example FTDI or Prolific. Optocoupler is connected to the RX pin of this chip (data to the computer). The other direction (computer to multimeter) is left unconnected.

USB connection is as per datasheet of the chosen chip.
USB drivers can be downloaded from the chosen manifacturer's site.

MadMax · Objavljeno: Ned Mar 16, 2014 10:58 pm Naslov sporočila:

heartman · Objavljeno: Pon Mar 17, 2014 12:42 am Naslov sporočila:

Hi,

Aly, many thanks for this quick answer.
Really clever way to replace the original plug.

MadMax, I didn't open my multimeter to check the chip used,
but, not really sure, but I think I can remember it's a sunplus chipset,
it means it's an old multimeter model.
I tried every drivers found on the web, even prolific without success.

I'll wait a little bit before making the opto hack, if someone have a way
to make the driver works under Win7 x64, I'm open.

Anyway, I'm happy to know at least I have a solution with the opto hack.

Thanks again guys, and sorry for the foreign language.

MadMax · Objavljeno: Pon Mar 17, 2014 1:30 am Naslov sporočila:

Sorry for misleading you, you're right: V&A 18B used Sunplus.

I had V&A 38B (less than one year old) connected to laptop several weeks ago and it uses Prolific so I thought in 18B is used the same.
I connected my (several years old) 18B's cable right now and it is Sunplus as you said.
As Wiki says, there are 2 versions used, old with Sunplus and newer with Prolific.

Maybe someone find it useful: I have also tested cable from newer 38B (Prolific) on old 18B just now and it works.