Electrical test and measurement equipment reviews.


Industrial Test Tools Scoreboard
Reviews of ONLY THE BEST !!   Tools for truly experienced and productive human brains.
    Written by: Kiriakos A. Triantafillou, Industrial maintenance electrician, Hellas. (2012 - 2021 -> 2025)
Digital Multimeter, Clamp on meter, Oscilloscope, Electronic component testing tools.


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 Note: Front page includes recent Blog activities  (past two years)… For older Reviews use navigation buttons
Donate-Sponsor BRYMEN BM878 Review


handheld DMM & insulation resistance

BRYMEN welcomes 2015 with one additional product Series which was missing from their product line. BM870 Series is the combination of a fully featured multimeter with the needed functionality for insulation measurements. ITTSB will review BM878 model which combines most features for an industrial electrician.

DER EE DE-711 AC/DC     DMM current probe 67/600A

DER EE Electrical since 2013 had in their planning to release DE-711 AC/DC clamp current probe, so to work in combination with DE-208A multimeter.

DE-208A multimeter has been reviewed by ITTSB many months back, and the verdict was very positive.

DER EE DE-5004 , scheduled review at 2021

DE-5003 & DE5004 are 2015 released products which combining for a first time worldwide, a multimeter and an LCR bridge in the same package.

Definably DER EE Electrical ltd in Taiwan worth the title, of a company which offers innovation even within 2015.

Pictures from it arrival at ITTSB Forum

Multimeter with LCR capabilities

Last update 7 June 2021
News corner (past 12 months Blog life Log)..
June 7,  2021
ITTSB Blog most festive day than the other 364, this is now an nine years old project, and all memories of how this started? They are now flooding my head.
Nowadays  all the world is aware that my foundation, this is my off-line good reputation in electronics repairs , which this kept me alive at good and bad times.   

February 25, 2021
The Japanese Canare Electric Co., Ltd. this invented a special cable the Canare L-4E6S microphone cable.  which I am about to explore it performance at electrical metrology applications.  Two twisted pairs, fine copper strands, external copper shield, ultra flexible.   

April 15, 2021
Time Electronics LTD UK, decided to send a new portable calibrator to me ( Free of charge ) this to replace the one which I had and this were damaged by getting connected accidentally to mains.  This action it is above money and trade and or product support,  this is called as mutual appreciation of human personalities according my book.

October 26, 2020
Calibration Tools: Ceramic capacitors Class 1 for multimeter and LCR inspection

July 06, 2020,
Unexpected gift arrived in my hands ... an damaged CORSAIR CX750 CP9020015, this is an quality CWT (Taiwan) design, this PSU was involved in to an mysterious accident.

7 June 2021 & ITTSB Blog Celebrates nine years of activity

Along the offering of DMM repair services within EU

My new problem, this is that now I am in love, at getting involved with that non popular science, this loaded with so much complexity, this be combination of academia with electrical measurements and relative products and everything comes down to electrical and electronic applications.

Nine years ago I was 43 years old and now I am 52,  and as you get older and wiser, the art of content creation this transform to a bigger challenge for your own brain and your eyes and your body.

This is why I made the choice in the past three years  of me to get involved only with worthwhile product review projects, when and if they appear.

The NEW Blog post bellow this is a window for you to enter to my off-line world and at my very own electronics repairs lab but not in the form of showroom. So far my technical skills at repairing benchtop multimeter since 2009, these were known to a very few people along specific private industries these serving national defence in Greece.

Now its time for new actions and deployment of fresh future plans,  therefore if you need help about having serviced / repaired an benchtop multimeter at 6 ½ digits resolution and this is made by FLUKE / Tektronix, them feel free to contact me due email.  To clarify I am freelancer and your last hope, when you need an of the chart solution with a friendlier repair bill.

While this is a festive day for ITTSB Blog as Internet project, I did select this day too, so to announce and or advertise this new available offering, of multimeter repair services, available exclusively within European union.

Note: FLUKE brand T-shirt this is an old gift,

and this still going strong after be washed over and over in the past eight years.

 I have also one from HIOKI brand and two of Agilent technologies DMM division, along of one from Agilent technologies oscilloscope division and the specific one this is my winter time dress code.  

For the latest T&M Market news,
scheduled reviews,
technical chat,
visit today the
ITTSB Forum …
Join us today !!
Massive test of high quality multimeter regarding ammeter burden voltage
Burden Voltage this is most essential and frequently overlooked enemy of a perfect measurement.
An ammeter shunt allows the measurement of current but such a resistor will introduce losses which we should calculate manually.

Since January 2019 ITTSB blog toolbox this now includes a benchtop 6 ½ DMM with basic V DC accuracy of 0.0024 % , this is lots of precision and one of best applications’ using it, this is exploration of Burden Voltage at handheld DMM.
Kiriakos Project !!   High precision meeting with Made in Greece creativity!
First project
Resistors box  for insulation resistance testers & verification of their calibration up to 4000 V POWERTRON GST4020
Second project
Seven dial decade resistance box for handheld and bench top multimeter calibration inspection.
Hermetically sealed Vishay Foil Resistors
Third project
Ultra-High precision resistance box exclusively made for bench top multimeter calibration inspection.
Hermetically sealed Vishay Foil Resistors
Calibration standard class.
POWERTRON GST4020 ITTSB project 2017 Ultra High Precision resistors Box High Precision Decade resistors Box
7 April 2020:  Data Logging Software Development Project     Japan & Greece
"Gentlemen, START your engines"
Get ready to discover the Freeware data logging software, benchtop support added beginning of 2020, today this is a Priceless companion for our “digitally measuring investments”.
Software for FLUKE: 8846A, 8845A, FLK45, DMM4050, DMM4040 (among several other handheld multimeter)
I was had to get challenged with SCPI commands syntax for two months, but We Made it !!!
Link to: TsDMMViewer Multimeter Data logger Software - Review
Link to: TsDMMViewer & FLUKE 8846A Precision multimeter, RS232C Connectivity, Help and Tips.
New Forum section at 2019  .. Used Bench top multimeter under the microscope..
In contrast with the market of handheld multimeter which this demonstrated since 2010 and later a significant quantity of modernized instruments, market segment of benchtop multimeter did not follow a similar progressive path.
A few brands just modernised product exterior design of their 6 ½ digit DMM, by setting their expectations at price tag of 3000 Euro which this is extremely high for the working class of electrical or electronics freelancer trouble-shooter.

Expected self adjusting move, when benchtop DMM market this facing such pricing anomalies this is consumer’s attention to steer at used equipments.
I did my best at exploring past champions of the year 2000 and after, and now at ITTSB Blog forum you may read tips which will help you regarding buyer expectations relative to software support, spare parts availability and product support (if there is any of those still offered by the manufacturer).

Portable calibrator connected to Mains.. is this the END of it?
A little bit of you feeling tired and or a small distraction, this is you looking for trouble.
Here is my own recorded  adventure.
Under corona virus Pan European lock-down.
Begging of April 2020
& this adventure ended at April 2021
Link: This story it is hosted at ITTSB Blog Forum
I wish to thanks Time Electronics UK employees!  I did receive partial technical assistance, with the factory this be closed and help were delivered to me by their home computers.
July 2020:  Exploring contact resistance of Molex connectors and pins

Bad connection of a single Molex pin this caused damage at 750W PC power supply.

They say that the Devil he gets hidding behind the details.

This occasion reminds attack from the back in to a dark alley.

No warning, no time to respond, and now I am investigating the crime scene for clues by the use of best electrical test and measurement equipment.

February 2021: Four Wires resistance measurement under Asian sabotage.
Four wires resistance measurement this is under sabotage at our times, mostly because modern manufacturing methods at China mainland, this now delivering to us unworthy in quality test leads and Kelvin clips.
The largest victim this is us that we try to get the best experience by the use of qualifying benchtop multimeter.

Any respectable industry of dedicated resistance meters, this now using reversal polarity method so to deal with thermal EMF, and the hidden advantage of this technology it is the detection also of EMF this caused by dissimilar metals.   
Even quality benchtop multimeter of our times, they still use the Law of Ohm and DC current with stable polarity, at very low resistance measurements the quality of test wires and clips this is now highly important.

Unfortunately most consumers are unaware that low cost test wires and clips and banana plugs, all are now made due recycled brass which this is poorly separated from foreign objects, the outcome is the formation of some sort of alloy of unknown composition.  The problem becomes greater when the formed alloy this containing air bubbles among with dust particles, and even substances which are known causing oxidation at pure brass or at copper.
Such low-end accessories then receive a low-end cover of gold paint used at toys making, and then they are presented as Gold-Plated goods.
The sabotage today touches all sectors, test leads, banana and BNC plugs, and even regular transformers windings.
I am now preparing one special Blog page, full of facts and links so this content to serve as line of defence against the Asian sabotage.

May 2021 CANARE L-4E6S Best cable for DMM Kelvin clips (DIY project).

Here is my latest Blog post in favour of an excellent product made by Canare Electric Co., Ltd. In Japan.  

It is unfortunate that most known named as A Brand, at electrical test and measurement they now focusing making money from newest industry application and they overlook to modernise the R&D of  fundamental accessories which serving benchtop multimeter.

The L-4E6S cable this a product solution in full compliance even to strict Best practices that Electrical metrology imposes to us, for retaining of quality at precision electrical measurements.

This is my eighth year of Blogging, my work bench this is now full of precision equipment for all sorts of electrical measurements, along of very expensive calibration standards.  Even so I was missing of a KELVIN clips harness this capable to offer noiseless measurements at all times.

My attempt for DIY solution ended to complete success, and now I can brag that an electrician were saved by one industry that their brand name ends to Electric Co., Ltd.

CANARE L-4E6S Cable Review
 The return of VARIAC …  Inverters & ups testing , ITTSB Project

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Kiriakos Triantafillou © 2012 - 2025

Name space registered to  EURid  May 8, 2012

Ups and inverters testing after repair, this is a necessary action for any Industrial Maintenance Electrician or Electronics troubleshooter whom respects his reputation.
VARIAC adjustable transformer this is still most inexpensive and effective way having an adjustable ACV power source in your hands.  

Instead getting a cheap poor quality VARIAC assembled in China or India (unreliable toys for hobbyists), I did follow route of DIY just for product design and case selection.

Most essential parts at this VARIAC project are the finest ones still available in our decade.
The outcome this is now a professionally grade adjustable ACV source for 0~270 Volts (VARIAC adjustable transformer among with Single Phase Voltage and Current Breakout Box, and a basic ACA 2x150W loads.

Regarding bill of materials and cost estimates, I did follow most cost effective path but even so by using exclusively highest quality of parts them complying to most recent IEC directives’.

I like to thanks DER EE ELECTRICAL METER CO. LTD. in Taiwan for their sponsoring of all necessary  analogue meters for those two ITTSB Blog projects’ !!  
Relative WEB Links

ITTSB Mini Articles

My personal viewpoints, comments, News.

28 May 2014

Safe 220V & 380V measurements with a bench top Oscilloscope by using one differential probe.

The Bottom line is that you can not avoid paying the price for a true differential probe if what you have in mind is work instead play.


I am now an 45 years old electrician, and today I am able to see the Mains voltage and measure its and every parameter.

Never thought that my first class oscilloscope with the differential probe hooked up, that has so much to offer.  


My first FLUKE 87V meter mini adventure (8-2010)

FLUKE 87V GSM issue

Burn in of OLED's is a known problem (8-2012)




Four Industrial handheld multimeter's tested above the 1000 ACV mark.

Monday 1 February 2016

ITTSB Blog up to date this performed many individual reviews of handheld multimeter, this latest benchmark has to do with the performance of four full size multimeter's when them get tested out of their measuring specifications’ that is above the 1000 ACV range.

Few months back I started thinking to build for my lab one amplifier which this in combination with a function generator, it will work as adjustable ACV source …….

Mini articles archives
Multimeter them getting constantly improved because ITTSB Blog it does record engineering innovations and even past made mistakes.   
ITTSB Blog forum this is extension of ITTSB Blog and blogging activity this is far more frequent and topics they do cover far more wide spectrum.
Click over the image so to discover it too !      
FLUKE 8846A Calibration test 2021

New since 2021

Benchtop DMM repair services

Greece and EU

Use ITTSB Blog email address for more info.

New since 2021

Benchtop DMM repair services

Greece and EU

Use ITTSB Blog email address for more info.

New since 2021

Benchtop DMM repair services

Greece and EU

Use ITTSB Blog email address for more info.

New since 2021

Benchtop DMM repair services

Greece and EU

Use ITTSB Blog email address for more info.

New since 2021

Benchtop DMM repair services

Greece and EU

Use ITTSB Blog email address for more info.