Yokogawa Bench Meters, Slim Pickings. - Page 1
Forum section: electronics / testgear

author: Muttley Snickers
author_rank: Unknown
timestamp: October 21, 2015, 01:59:24 am
content: Greetings People,I came across a listing on Ebay for a Yokogawa bench multimeter and figured that I would do some further research on them only to find that they are not doing bench multimeters as such anymore, they do have a couple of other bench meters as can be seen by the link below but these do not appear to be dedicated multimeters, more along the lines of temperature and resistance measurement.They still carry a large selection of handheld meters and other test and measurement equipment again linked below, but no current bench multimeters to replace the previous models that I could find unless they are looking at a new series which could be the case I suppose, this is just pure speculation of course as I have no clue.There is very little available in regards to online manuals that I could see including on the forum, are they worth keeping an eye out for ?Any thoughts or experience with these meters would be most welcome.Bench Metershttp://tmi.yokogawa.com/au/products/other-test-measurement-instruments/Handheld Metershttp://tmi.yokogawa.com/au/products/portable-and-bench-instruments/digital-multimeters/Discontinued Productshttp://tmi.yokogawa.com/au/service-support/discontinued/Picture 1. The listing I found on Ebay for a 7552, the price seemed fair but I was slightly discouraged after finding what appeared to be the same unit elsewhere, I doubt that he knows it's history, no disrespect intended to the seller and I suspect he is just an equipment dealer.Picture 2. The listing I found elsewhere for a remarkably similar unit, looks like the same unit above to me.More Pictures. Just some other Yokogawa bench meters and I did like the look of the 7555 but it's now discontinued as well.

author: tautech
author_rank: Super Contributor
timestamp: October 21, 2015, 02:06:39 am
content: What's the slot bottom of the front panel for Pete?

author: coppice
author_rank: Super Contributor
timestamp: October 21, 2015, 02:08:01 am
content: I've never used a Yokogawa multimeter, but their bench top power meters are almost the industry standard. A number of specs, like Intel's server power specs, specify Yokogawa meters as the reference.

author: Muttley Snickers
author_rank: Unknown
timestamp: October 21, 2015, 02:10:34 am
content: Quote from: tautech on October 21, 2015, 02:06:39 amI read on another product that it may be a memory card slot, I could be mistaken of course otherwise it's simply a cockroach entry point.Here's more pictures of a 7552 from another site, and the slot looks too big for a compact flash and too small for a floppy, one document indicated an optional custom memory IC card and another showing an interface similar to a PCMCIA to compact flash adapter, I've added the PDF below and I suspect others will know what it's for, also added some basic specs on a couple of meters, unfortunately few and far between I'm afraid.

author: tautech
author_rank: Super Contributor
timestamp: October 21, 2015, 02:34:24 am
content: Quote from: Muttley Snickers on October 21, 2015, 02:10:34 amYep

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 21, 2015, 02:48:28 am
content: Quote from: tautech on October 21, 2015, 02:34:24 amCould be a designated magic smoke escape point...

author: enut11
author_rank: Super Contributor
timestamp: October 23, 2015, 11:46:18 am
content: Hi Muttley SnickersJust purchased a Yokogawa 7552 DMM on eBay and waiting for it to arrive. Joined the Forum yesterday and this is my first posting so I hope I get it right.There was no manual in the listing and I now see that documentation is hard to find on the net.I saw that tinhead has a 7552 and presumably a user manual but I have not been able to contact him.If anyone has direct contact details for tinhead would you please ask him to contact me (enut11) at his convenience regarding the 7552.I would appreciate any support on this matter.

author: Muttley Snickers
author_rank: Unknown
timestamp: October 24, 2015, 03:01:13 am
content: Welcome to the forum,Was the unit you purchased the same as listed above, I was so tempted by the way but soon realised that they were phased out in 1996 and with possibly no history available on that particular unit it was enough for me to steer clear, the lack of information didn't help much either.As yet I have not found the 7552 manual but only conducted a brief search, they may be out there somewhere and one will turn up I'm sure, I did find however the full PDF manual for the 7555 which was the successor to the 7552 but it's in Japanese.In the interim here is a link below to the 7561/7562 full manual in English, PDF is 8.72 MByte and these are a 6 1/2 digit meter as opposed to the 5 1/2 digit 7552 which you have, some features and functions are most likely the same, also please let us know how you get on and if you dont mind a review or opinion on the meter would be fantastic if you can spare the time.Best regardsMuttleyhttp://www.yokogawa.co.jp/ftp/dist/ks/eusers/basic/nbqc1/im/IM7560-10E_04.pdf

author: enut11
author_rank: Super Contributor
timestamp: November 01, 2015, 11:22:50 pm
content: Hi Muttley. I purchased the 7552 from an Aussie dealer. There were only two listings at the time. It arrived just as we were leaving for a week away so only had a brief look at it. Needs a good clean! Looking forward to checking it out this coming weekend.I just purchased a dmm calibrator online from the USA.I had previously owned a HP34401 6.5 digit unit which was very nice. It was part of my dedicated workshop which was dismantled and sold off when we moved into a smaller flat. Now slowly buying more equipment as I need it.The 7552 looked to be an afforable quality instrument. Time will tell. Unfortunately the Japanese are not very generous with their manuals.Regards

author: enut11
author_rank: Super Contributor
timestamp: November 07, 2015, 12:42:13 pm
content: Hi allJust back from leave and unpacked the Yokogawa 7552 that I purchased on eBay a couple of weeks ago. This is a 5.5 digit bench DMM with a best DC V accuracy of 0.0035% over 24 hrs or 0.008% over 1 year. These are fairly good specs and I will be giving the unit a thorough check over the coming weeks.The unit was purchased from an Aussie eBay dealer who said that he got it from a local (SA) laboratory.First impression is that it looks in good condition and needs a good clean-up. It had a number of (compulsory?) stickers on the case including one claiming it was tested on 19/02/2015 by Testel, which sounded encouraging.Powered up the unit after checking that the AC voltage selector was correct. Nice red LED display. Did a quick check and volts and ohms produced expected results. DC A did not work. Blown fuse and easily replaced. This model also has a handy 20A range.So far so good. More tests to come including a peek inside the case. Thanks for the user manual Muttley I will be reading it soon from cover to cover.

author: deadlylover
author_rank: Frequent Contributor
timestamp: November 07, 2015, 12:52:47 pm
content: Very nice, I'm looking forward to seeing what voltage reference they used inside.I like that multidot display for the "V" symbol, reminds me of their arch enemy Advantest. Mine's hopelessly dim. =P

author: enut11
author_rank: Super Contributor
timestamp: November 08, 2015, 02:21:40 am
content: Hi deadlylover!! I will be cleaning the 7552 and having a look inside in the next few days.I like the look of the Advantest. Certainly more modern than the 7552 which looks rather antique.If that is a green LED display on your Advantest, I wonder why it is so dim? May be fixable?Lou

author: deadlylover
author_rank: Frequent Contributor
timestamp: November 08, 2015, 02:46:34 am
content: Quote from: enut11 on November 08, 2015, 02:21:40 amI think they just get dimmer over time, this unit was made in 1990. Which reminds me....I better get around to changing the backup battery.

author: nowlan
author_rank: Frequent Contributor
timestamp: November 08, 2015, 04:03:00 am
content: The 2 meters on ebay have 110v only =(

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 08, 2015, 04:27:38 am
content: Shame they don't have voltage selection switches, these look like quality meters...

author: helius
author_rank: Super Contributor
timestamp: November 08, 2015, 04:45:59 am
content: From the Card Interface pdf, the specs match a CardBus interface for Compact Flash cards. It states 66.6 MB/s peak, which is the throughput of CardBus word DMA.

author: deadlylover
author_rank: Frequent Contributor
timestamp: November 08, 2015, 04:56:17 am
content: Quote from: crispy_tofu on November 08, 2015, 04:27:38 amHmmm I might be confusing the models, but some of them have another hidden set of switches behind the sticker showing the selection of 230v/200v like on enut11's unit.Maybe he can have a feel around and see if there's anything behind that sticker just to confirm. I guess we'll know for sure when he lifts up the skirt.

author: Muttley Snickers
author_rank: Unknown
timestamp: November 08, 2015, 07:06:54 am
content: Here are the model codes from the 7561/7562 series manual which are most likely similar codes used on enut11's 7552 unit, the 7561 looks like it does not have AC measurement going by the codes.

author: enut11
author_rank: Super Contributor
timestamp: November 08, 2015, 09:00:36 am
content: Welcome back Muttley. Yes, my 7552 is similar to the 7562 in that it has a serial interface. It also has an additional current range to 20A but no rear terminal inputs. The large slot at the bottom left which was a source of amusement in an earlier posting is for a removable CF memory card. It was used to store additional measurements or to boot up the meter into a specific configuration. However, needs a special adapter to hold the card.Below are first pix of the inside. I was not able to identify the voltage reference chip so if someone could have a bit of a look in case I missed it.

author: enut11
author_rank: Super Contributor
timestamp: November 09, 2015, 10:07:46 pm
content: Hi All. I checked out the low DC volts on the 7552. I have a handy home built DMM checker built 5 years ago from a Silicon Chip (Aust) kit. It is based on an AD588 reference chip with a nominal output of 10.000V. I also added a voltage divider based on 0.1% resistors to check the 2V and 200mV ranges.Nominal 10.000V reads 10.0003V on the 7552Nominal 1.962V reads 1.96202V on the 7552Nominal 186.5mV reads 186.49mV on the 7552I don't really know how accurate the AD588 is but the figures look encouraging nonetheless.I ordered a DMM checker from the states which is calibrated so looking forward to that. It will check spot values for DCV, ACV, DCA, ACA and R.http://www.ebay.com.au/itm/271791808061?_trksid=p2057872.m2749.l2648&ssPageName=STRK%3AMEBIDX%3AIT

author: Muttley Snickers
author_rank: Unknown
timestamp: November 09, 2015, 11:03:27 pm
content: Thanks very much enut11, it looks like you scored a keeper....and the pictures showing the inside of the unit indicate a very nice and clean meter, not to mention bug free..I've only had a brief look over the 7562 manual and did notice that it indicates that each mode can be independently adjusted which is very nice as opposed to running through an entire calibration sequence, which some of us are either not geared up for or confident enough to do, yours so far looks like it is spot on.Was that 7562 manual suitable or are we still keeping an eye out for the dedicated manual ?.Many thanks and well done...Muttley

author: enut11
author_rank: Super Contributor
timestamp: November 10, 2015, 01:10:08 am
content: Thanks Muttley. I had a long look for the 7552 manual without luck. So far the 7562 manual has been extremely useful. Based on my experience so far I can recommend the 7552 DMM. It has a useful range of features, promises good accuracy and has a good clear display. I could not find any evidence of leaking caps on any of the boards despite its age (>20yrs?). Because it is not well known It can be bought for a discount compared to a HP, Fluke or Keithley. Someone asked if there was a way to switch a 110AC unit to 240AC internally. I will have a look at this next time I open the case.BTW, thanks for starting this post as I found it while looking for a manual. Eevblog has been a great source of info for lots of electronic stuff that I am interested in.

author: enut11
author_rank: Super Contributor
timestamp: November 10, 2015, 07:35:17 am
content: Quote from: deadlylover on November 08, 2015, 04:56:17 amHi nowlan, crispy-tofu and deadlylover. Had a look inside my 7552 and there is a switch behind the 230VAC/200VAC label which most likely selects 100VAC/115VAC operation. Also, the 7562 manual describes the process - see pic below.

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 10, 2015, 07:57:38 am
content: Ah okay, I stand corrected.Thanks!

author: enut11
author_rank: Super Contributor
timestamp: November 12, 2015, 10:39:29 pm
content: Quote from: deadlylover on November 07, 2015, 12:52:47 pmHi deadlylover. Had a good look inside the 7552 at the chips trying to identify the voltage reference chip.Main PCB chipsSL161525 (8 pin metal can)LM3396N1379136?TC4001TC4049TC4052TC405374LS04N74HC00CA4558OP27LT055AD707A2004C uP?Sub PCBLM339LF351LF353LT012LT1055AD7074200?C311CNE5532I suspect the the SL161525 may be the voltage reference chip but I cannot find any info on it. Equivalent to an LM369???Anyone up to speed on reference chips?

author: enut11
author_rank: Super Contributor
timestamp: November 14, 2015, 11:30:04 pm
content: Hi All.First of all I must say that I am very impressed with build quality, features and performance of the Yokogawa 7552 and can recommend it to anyone who wants an affordable bench meter. The internals of my unit are pristine with no evidence of the dreaded leaking electrolytic capacitors that seem to affect some other brands.Delving into the innards and using the meter on a regular basis, I am still discovering features as I use it. While testing the AC ranges for functionality I found that I could quickly check the AC frequency by pressing Shift + AC V (also works for AC A). I don't have a spec for frequency response as the 7562 does not support this feature and I am currently relying on the 7562 manual as I have not been able to find a 7552 manual. The 7555 specs sheet states 100KHz so the 7552 is likely to be similar, so it is a low (audio?) frequency counter only.

author: radhaz
author_rank: Regular Contributor
timestamp: November 15, 2015, 08:15:24 pm
content: Have you seen this?http://www20.tok2.com/home/daisuken/yokogawa7552.html

author: Muttley Snickers
author_rank: Unknown
timestamp: November 15, 2015, 09:41:12 pm
content: Quote from: radhaz on November 15, 2015, 08:15:24 pmI couldn't get that page to open, was this a link for the 7552 manual ?, what was on that page ?, Thanks.

author: radhaz
author_rank: Regular Contributor
timestamp: November 15, 2015, 09:52:25 pm
content: It's a Japanese page with specs and brochures for the 7552.

author: Muttley Snickers
author_rank: Unknown
timestamp: November 15, 2015, 09:59:19 pm
content: Thanks very much, I will convert it to PDF later for future reference, here it is in MS Word, edit: PDF addedNice Find..

author: enut11
author_rank: Super Contributor
timestamp: November 16, 2015, 05:06:04 am
content: Thanks radhaz and muttley. The 7552 spec sheet is very handy. It verifies the frequency limit of 100KHz.I checked the display overshoot on DC V by applying a 12v signal repeatedly and could not detect any significant overshoot on both auto and manual ranges.The firmware version for my 7552 is 2.02 rv at bootup.Btw, tinhead has just responded with a 7552 manual amongst other info...

author: radhaz
author_rank: Regular Contributor
timestamp: November 16, 2015, 07:08:11 am
content: for those who are interested, yahoo auctions is the ebay of japan.http://auctions.yahoo.co.jp/here is the kanji for yokogawa:??

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 16, 2015, 07:46:21 am
content: The kanji doesn't show up...

author: deadlylover
author_rank: Frequent Contributor
timestamp: November 16, 2015, 09:09:30 am
content: Trythis linkinstead.

author: enut11
author_rank: Super Contributor
timestamp: November 16, 2015, 10:03:44 am
content: Had a good look around. Lots of nice gear but nothing with a fixed price is cheap. Unsure how to bid for auction items...

author: deadlylover
author_rank: Frequent Contributor
timestamp: November 16, 2015, 10:15:59 am
content: Quote from: enut11 on November 16, 2015, 10:03:44 amYou have to look for a proxy buying service in Japan, there are heaps out there on Google with different fees and what not. Look for one that can ship via UPS if you plan on importing lots of items in a combined package, they seem to be the most reasonable (EMS to Aus limit is ~20kg, and costs ~$300 for 20kg). Stuff seems cheap at first glance, but then there's the commission, domestic tax, domestic shipping, payment fees, paypal fees, packaging fees and finally international shipping....Just as a rule of thumb for bench gear, expect to pay an extra of about ~$25 per kilo on top of the actual item cost itself. Most test equipment is sold as-is too, so it's a gamble just like on eBay.It all adds up reaaaal fast.

author: Muttley Snickers
author_rank: Unknown
timestamp: November 16, 2015, 11:15:53 am
content: That web site is a bit of a tease for some of us and when I first started looking around for info on the Yokogawa gear I came across these sites but had virtually no luck in properly translating them.I couldn't find out what the Yokogawa equipment was worth when new but I would imagine that it was rather expensive and the reason I started the thread was to hopefully get an indication on how this gear is holding up and whether it was worth consideration, it appears that enut11 got a very nice unit but so far thats about all we have to go on.One appealing feature for me on these meters is that the LED displays on them still look in very good order and I've been over dozens of pictures, I personally find the dim VFDs on some other brands a slightly dissuading factor when looking to purchase older equipment.Muttley

author: tinhead
author_rank: Super Contributor
timestamp: November 16, 2015, 10:27:23 pm
content: as i got asked for, here my collection of user manuals, service manuals and other things for some Yokogawa gears (755x, 756x, TC1xx, FG1x0, FG2/3xx)http://1drv.ms/mylink if not working, send me PMAfaik, the firmware 2.02 is the latest revision for7551and7552models, in case someone have newer version i would be happy to get a copy.I'm looking as well for firmware (eprom dump) from7561and/or7562models.

author: enut11
author_rank: Super Contributor
timestamp: November 16, 2015, 10:29:31 pm
content: I agree. VFDs are nice when new but some fade quite badly with age. Old LCDs can also be bad news, especially if used under bright lights or sunlight. Replacements can be impossible to get or very expensive. Good old LEDs may not be as sexy but they seem to last and last.enut11

author: radhaz
author_rank: Regular Contributor
timestamp: November 17, 2015, 03:49:02 am
content: I have an Advantech 6551T, with green LED 5.5 digit. I like it much better than my HP 3468B LCD display. It has some nice functions, and is built a lot like the Yokogawas pictured here. Sadly, there is very little in the way of service information like schematics.

author: enut11
author_rank: Super Contributor
timestamp: November 17, 2015, 11:09:28 am
content: Quote from: tinhead on November 16, 2015, 10:27:23 pm...Thanks very much tinhead. The 7552 User Manual is different in a lot of areas to the 7562 manual that I was using previously. Now makes setting up and calibrating my Yokogawa 7552 a lot easier.enut11

author: tinhead
author_rank: Super Contributor
timestamp: November 17, 2015, 09:52:33 pm
content: btw., when you wish to know more about GPIB commands on 7551/2 check the 7555 user manual as well.

author: enut11
author_rank: Super Contributor
timestamp: November 18, 2015, 02:35:13 am
content: Thanks for the tip tinhead.Hi allJust taken delivery of the DMM Check+ from the States. It is a precision voltage, current, resistance and frequency standard.I will be testing the 7552 soon to see how it goes.The Malone DMM Check+ is calibrated and guaranteed to hold the values for up to 6 months - see pix for more info.

author: enut11
author_rank: Super Contributor
timestamp: November 19, 2015, 06:30:34 am
content: Some preliminary checks on the Yokogawa 7552 DMM as received using the Malone calibrated DMM Check Plus. Both instruments were allowed to warm up for about 1/2 hr before testing at 23 deg C.Ref 5.0000v DC reads 4.9995 on 7552 (1 year spec is 0.008%)Ref 4.999v AC reads 5.0115 on 7552 (1 year spec is 0.2%)Ref 1.0001 mA DC reads 1.00073 on 7552 (1 year spec is 0.07%)Ref 1.000 mA AC reads 1.0001 on 7552 (1 year spec is 0.5%)Ref 100.028 ohm reads 100.028 on 7552 (1 year spec is 0.018%)Ref 999.81 ohm reads 999.75 on 7552 (1 year spec is 0.015%)Ref 9.9977Kohm reads 9.9964K on 7552 (1 year spec is 0.015%)Ref 100.085 Kohm reads 100.078K on 7552 (1 year spec is 0.016%)These numbers suggest that the 7552 is working well and generally within spec so I am happy to use it as-is.

author: nowlan
author_rank: Frequent Contributor
timestamp: February 18, 2016, 11:53:04 am
content: I bought a 7555 from yahoo auctions via shipping agent. I had it sent via boat to see if they could handle larger items via sea freight etc. I was in no real hurry, but took much longer than expected.I had hoped to do voltage conversion to 220v easily, but upon opening it up, is just a single transformer attached to side. Different from the 7552 photos earlier. I figured it would be similar to the other model which had hidden voltage selection. I do have a step down, I just need to find a US lead.Managed to power it up at school, but didnt have means to test it easily. Some other time.

author: Muttley Snickers
author_rank: Unknown
timestamp: February 18, 2016, 10:52:48 pm
content: That's a bugger about the mains supply on the 7555, it is noted in the manual in regards to the model prefix numbers and as we have now found out something to watch out for whereas some of the other models noted have selectable universal input voltage.A link to the user manual page. it's on page 7 for the 7555.http://tmi.yokogawa.com/au/technical-library/instruction-manuals/A picture from the manual of the model codes and the rear of the unit.

author: enut11
author_rank: Super Contributor
timestamp: February 20, 2016, 09:47:10 pm
content: That's a good looking meter! Gone is the odd angled input panel of the 7552. I like the large easy to read button labels. Looks like Yokogawa dropped the option of multi voltage operation on this series. I hope you get good use out of it. I love my 7552. It is an accurate and versatile meter. Do you mind sharing what you paid for the 7555?

author: nowlan
author_rank: Frequent Contributor
timestamp: February 24, 2016, 07:04:45 am
content: I paid around 8050 yen ($99au), plus shipping cost me around $180 all in. I think exchange rate may have changed since last year.The meter appears to work via step down. However throws an error indicating lithium battery failed. Looking into replacing that this afternoon.Also on 4 wire mode, it shows overload. Possibly failed relay?http://www.importmonster.com.au/yahoo?cat=0&term=yokogawa

author: nowlan
author_rank: Frequent Contributor
timestamp: February 24, 2016, 07:08:35 am
content: Some internal pics for you.

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: February 21, 2022, 03:36:10 am
content: I just came across an Omega 7563 digital thermometer, which is a rebranded Yokogawa 7563. It is similar to 6-1/2 digit 7561 and 7562, except replacing current and AC ranges with thermocouple and RTD. The nicest feature is a thermally isolated enclosure in the back for connection of thermocouple with reference junction compensation.The DC voltmeter is surprisingly accurate, within a few ppm as far as I can measure. It is also quiet for a 6-1/2 digit meter, with the last digit rarely changing. Another nice feature is high input impedance up to 20 V range. One limitation is that thermocouple temperature is only displayed with 0.1 degree resolution, while RTD is displayed with 0.01 degree resolution, they could have added one more digit.Yokogawa 7563 was only discontinued in 2017, but my unit was made in 1992. It seems to use the same voltage reference SL161525 as the 5-1/2 digit meters. It was manufactured by National Semiconductor, but I also couldn't find any info, perhaps a custom part made for Yokogawa?

author: 2N3055
author_rank: Super Contributor
timestamp: February 21, 2022, 07:20:37 am
content: My 7562 has LT1021 as reference.Looking at the board at the time, there are unpopulated pads for a LM399 and a opamp, I guess also for a 10V circuit..

author: man216
author_rank: Newbie
timestamp: March 30, 2023, 07:23:33 pm
content: Hello guys! I just purchased this Yokogawa 7552 Bench Multimeter for myself. Can you tell me if it has an audio continuity feature? Thank you.

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: April 02, 2023, 05:02:15 pm
content: I setup a continuity check using the limit checking pass/fail output. Put a buzzer in the back and program hi/low limits for resistance. It helps to have the memory card, so one does not need to reprogram the limits every time the meter is turned on.

author: scopeman
author_rank: Frequent Contributor
timestamp: April 04, 2023, 12:56:20 am
content: A couple pf years ago I bought on close out a Iwastu VOAC 7062 which is Identical to the Yokogawa DM7560 6 1/2 digit DMM. As Yokogawa built these for Iwatsu the quality is excellent. There is a teardown of these units on the forum.As you may know one of the divisions of HP was YHP Yokogawa HP. The VOAC 7062/DM7560 have voltage reference chips (heated buried Zener like LM395 IIRC) that are marked with an HP part number.This is no surprise as I believe YHP builds or built some DMM products for HP and perhaps continues to do so. The DM7560 is very similar to the current 6 1/2 digit DMM's of late from HP/Agilent/Keysight.YHP was most famous for their LCR Meters and Bridges and I believe the HP9342? Q meter and the HP4329 HiZ meter among other products. Top quality all the way.Enjoy your new meter!SamW3OHM

author: flash2b
author_rank: Regular Contributor
timestamp: August 10, 2025, 02:40:42 pm
content: I have made a TestController defnition for the the Yokogawa 7551/7552/7561/7562 Digital Multimeter, so you can do logging and charting. Please find ithttps://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/msg6006961/#msg6006961

author: flash2b
author_rank: Regular Contributor
timestamp: October 03, 2025, 11:04:23 am
content: I recently acquired a Yokogawa 7562 next to my existing 7552.It is aA revisionof the meter so the full model "756202 -1" (RS232, 100V) where as my existing has "755202 -B -7/F" (RS232, B, 230V/VDE plug).The firmware for the 7552 is v2.02 which is shown during boot-up where the 7562 is unknown since it does not show its version during boot-up. So I expect it to be v1.xx.I noticed that the input jacks on my 7562 are gold plated (apart from the A jack) while on the 7552 only the COM jack is gold plated. From the pictures on the internet I found that a 7562 does not have 4 gold plated input jacks like mine has. The 4 jacks on the rear are also gold plated.Also note that the 7562 is rated 600VAC while the 7552 is rated 700VAC, this is due to the revision (stated in the manual).I know the 7562 was in production longer that the 7552 and that there are also -B and -C revisions. Mine does not have a revision marking so I expect is to be -A like the first version.I was wondering if my 7562 has gold plated input jacks just because it is an old revision or that also other users of similar meters also have these jacks (and what revision they have).