Electrical test and measurement equipment reviews.
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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.
Seven dial decade resistance box for multimeter calibration inspection.
Ultra-High precision resistance box exclusively made for bench top multimeter calibration inspection.
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).
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.
By the use of conventional but qualifying benchtop multimeter, the ones using Law of Ohm and DC current with stable polarity. At very low resistance measurements the quality of test wires and clips this is highly important, because any unjustified high EMF this will destroy the measurement.
Modern technology this found at dedicated high precision resistance meters, this is the use of reversal polarity of pulses instead. Due this new method the expected thermal EMF influence this is minimised, the measurement now becomes stable and more accurate. But if even under this method there is still instability? this is good indication to alert us, that there is severe EMF this caused due severely dissimilar metals.
This is of how I did get alerted and started to further investigate, now I am aware that low-cost test wires and clips along banana plugs and even BNC connectors, these are not worth buying and neither gold paint used at toys making, this does not make them any better (fake Gold-Plated goods).
Best defence against the Asian sabotage, this is you stop paying money for such products.
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.
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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 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’ !!
June 2021 Benchtop DMM repair services within EU
This Blog post this is a door for you so to enter at my off-line world, my very own electronics repairs lab.
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.
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.
I do offer component level repair at a friendlier repair bill.
Multimeter repair services, available exclusively within European union. (Contact me by email for more details).
New since 2021
Benchtop DMM repair services
Greece and EU
Use ITTSB Blog email address, for more information's.
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.
Intro:
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)
Burn in of OLED's is a known problem (8-2012)
Four Industrial handheld multimeter's tested above the 1000 ACV mark.
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 …….
Latest news :
New since 2021
Benchtop DMM repair services
Greece and EU
Use ITTSB Blog email address, for more information's.
New since 2021
Benchtop DMM repair services
Greece and EU
Use ITTSB Blog email address, for more information's.
New since 2021
Benchtop DMM repair services
Greece and EU
Use ITTSB Blog email address, for more information's.
New since 2021
Benchtop DMM repair services
Greece and EU
Use ITTSB Blog email address, for more information's.
December 1 2023
I wish to inform all loyal ITTSB blog readers that specific product reviews which completed a life cycle of eight years or more they are no longer hosted from us.
Agilent/Keysight: U1272A, U1273A ... DER EE: DE208A, DE-5000 .... BRYMEN: BM869, BM257, BM189 ...
HIOKI E. E. : DT4282 ... TWINTEX: TFG-3620E ... MEGGER UK: AVO410 ... GW Instek: GDS2102A
February 15 2024
Active since 2024, WE DO NOT Recommend ATTEN soldering tools as solution for professional use.
This brand proved it self as unprofessional and it cannot be trusted.
March 22 2024
My new tool under evaluation the RST FG-100 dedicated low cost thermometer. And 191-212 Sensor.
I do share all my fresh discoveries at ITTSB Forum / Soldering tools sector
June 7 2024
This month ITTSB Europe website this completed twelve years of activity.
ITTSB forum sector, this now more at my focus.
Novemeber 8 2024
For a long time I was looking for a benchtop digital power meter, and especially the medium priced range, which them can do stand-by power measurements.
Today succeed purchasing it !! Its a modern benchtop instrument, this made by a small brand at mainland China.
My friends at sunsky-online.com, they helped me, by becoming a bridge between the buyer and the factory.
November 2024 SMART AC digital power meter / CoC Tier 2 EU
DCUU PM9913 AC digital power meter 600V 2A Low-Power. This is made by a small factory in mainland China.
I did order it, at the price of 134 Euro with VAT & shipping.
Unboxing photographs and product details can be found at ITTSB.EU Blog Forum » Electrical Power Analysis & Technical discussion