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You will all be thankful to know that I have finally reached my last blog in this road test review of the Megger  MIT420/2 Previous blogs have covered bench reviews and tests a teardown and insulation testing from electrical panels on motors and air circuit breakers In this blog I will cover the testing of generator rotor windings from a 92MVA and a 145MVA turbogenerator.     This is the main function of my job and the reason why the road test was of great interest to me. I cur ...
Up to this point the on site tests carried out with the  MIT420/2 have been based around motor tests either from a control centre or direct at the motor terminals Unsurprisingly the instrument has performed very well with the only issues really being around making connections to specific items during the earth test on a large motor and when using the supplied test lead to short out the winding after the tests These are all minor issues and relatives easy to overcome   This blog introd ...
In the previous blog some motors that had been refitted after maintenance were tested from their respective control panels I found that the  MIT420/2 had a few quirks whilst using it but nothing that became a major issue or prevented the instrument from being used In the next blog I am off to the other end of the cable and test out some motors at the actual terminal box Actually I am cheating a bit as I have access to motor stores so I tested a new 4kW motor a refurbished 90kW motor and two ...
As a Roadtester for the Raspberry Pi 3 & MathWorks Learn-to-Program Pack, I've encountered some bumps in the road due to the MathWorks documentation and examples being somewhat out of date.  I'd intended to blog earlier as I expect the other roadtesters have probably also encountered similar issues.  I'll do a full discussion in my review, but in case it might help anyone - the Raspberry Pi support packages for Matlab and Simulink in r2017b do not currently support Raspbian Stretch ...
The bench tests and desktop review have all gone well for the MIT420/2 Insulation Tester. In the next blog, I carried out some phase balance and insulation resistance tests from a low voltage (400V) motor control centre (MCC) for a gas turbine. The motor control centre is a large panel with two main feeders and then split down into multiple direct-on-line starters for various pumps and fans that the gas turbine requires to operate. The motors had been removed for maintenance work and then refitt ...
Hello and welcome to this tech review of E36312A- A triple output programmable bench power supply from Keysight Technologies.     Recently, I won a triple output bench power supply from Keysight Technologies. It’s been more than 3 weeks I’m exploring this bench power supply and this blog post reveals my experience with this product so far.   Let’s start with the appearance and the front panel of the supply. It has a nice and big colourful LCD, 2 separate con ...
This is a new survey from one of our suppliers regarding test and measurement equipment. Its purpose is to learn more about the suppliers you would consider working with.   The survey takes about 15 minutes to complete.   All qualified participants who complete the survey will be entered for a chance to win a $1,000 Amazon e-Gift Card.   Please be assured that we treat any information you provide as STRICTLY CONFIDENTIAL, used only in combination with answers from other respon ...
The last two blogs covered the bench tests applied to the  MIT420/2 and found that it performed better than expectations with all values obtained significantly within the manufacturer's specified tolerances However working on high energy electrical circuits has many safety implications so before I take the  MIT420/2 out into the field to do some real work I wanted to take a quick look at some of those safety features   As standard with most electrical instruments these days the ...
Hi Road Test Community,   I have a fully-featured Rohde and Schwarz RTE1204 oscilloscope on my hands at the moment, and I thought there may be some interest in reviewing it in the style of an official Road Test. I have been a somewhat passive member of this community for a few years now, so hopefully this will allow me to hone my review skills and provide a unique look at this professional-quality oscilloscope.   A bit of background: I had ordered a Rohde and Schwarz RTB2004 COM4 sc ...
Part A of the Bench Tests reviewed the performance of the auxiliary functions on the insulation tester and found them all to be well within the specified tolerances. In this second part of the Bench Tests, I will concentrate exclusively on the insulation testing function.   The MIT420/2 has five fixed voltages of 50V, 100V, 250V, 500V and 1000V and then a variable output function from 10V up to 1000V. This is not a voltage ramp function, the output voltage is set in the settings menu to th ...
In Blog 2 I opened up the  MIT420/2 insulation tester and found a well designed instrument with good quality construction and design methods to improve the robustness and safety of the instruments In this blog I will carry out some bench tests on the instrument to ascertain its functionality and accuracy This blog will concentrate on the auxiliary continuity resistance capacitance and voltage functions Any of the manufacturer's tolerance I have quoted in this blog can be found from their da ...

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