A Calibrated Question (Multi Meters)

OnlQQker · Apr 27, 2022

I have a Kewtech KT63 which I picked up a couple of years ago for testing stuff in the shed.
It has just run out of calibration and I'm not sure whether to contact Kewtech and ask them who to calibrate it or what?

I know on Ebay people are calibrating but you have to package it up and send it away, but my mate who works in Edmunson's, Leighton Buzzard (who I popped in and saw earlier) has just given me this flyer, he also mentioned that if it wasn't ready the same day and I needed to pick it up Friday, then they have a free burger van and drinks.

What he doesn't know is I can eat at least 25 quid's worth of bacon rolls, let alone free coffee!

[ElectriciansForums.net] A Calibrated Question (Multi Meters)

OnlQQker · Jun 3, 2022

Well I thought I would update the Leighton Buzzard Edmundson's info as free food and drinks and the fact it states 'Stratton Food Hall' I imagine it's top nosh. That's breakfast and dinner sorted, I'm banking on loads of other freebies

nicebutdim · Jun 3, 2022

OnlQQker said:
Well I thought I would update the Leighton Buzzard Edmundson's info as free food and drinks and the fact it states 'Stratton Food Hall' I imagine it's top nosh. That's breakfast and dinner sorted, I'm banking on loads of other freebies

View attachment 98244

Dilog only - at least I shouldn't have too long a queue ahead of me

mainline · Jun 3, 2022

pc1966 said:
Not sure about qualifications, but Time Electronics make all sorts of precision standards and cal kits. This one is about £5k and does MFT:

5030 Electrical Tester Calibrator

Clearly displays measurements and settings via Large LCD. For calibration of RCD, loop, insulation, earth testers and multifunction installation testers.

www.timeelectronics.com

Of course you need to have the cal kit calibrated by someone with even better equipment...all the way to the NPL or similar!

I have a couple of Time products, including their 1068 resistor standard (0.01% to 0.1% depending on value) and 1044 DC voltage/current calibrator (0.05%) but after work changes they have not been back for factory/standards lab cal.

I don't think any qualifications needed, just an understanding of using the kit.

There is also of course the expense of the various programming leads and software.

£60 for pushing a few buttons most of the time.

freddo · Jun 4, 2022

All calibration services seem to be poor and appear to be nothing more than a calibration 'check' and a piece of paper to say how far out the calibration is. OK so a range is out by 0.3, but they don't adjust the internal settings to correct this, which seems pointless. I have an inaccurate Fluke clamp meter in one of my MFT kits, when you switch it on, no cable clamped, it reads 0.5Amps. That was passed as all OK!

I also sent in a KT63 to Kewtechs repair and calibration service as the IR function provided no voltage output. They said all it needed was new software and they loaded a crappy newer version onto the tester (the previous version worked better), 'calibrated' it and sent it back as passing all tests. The insulation test still had no output!!!!! I ended up repairing it myself by resoldering the joints on the high voltage transformer as all the joints were badly cracked.

stevethesparks · Jun 4, 2022

westward10 said:
Never trust these calibration days. I have said before we sent some in and mixed in by accident was an analogue insulation continuity tester which just read open continuity all the time. Came back with a calibration certificate so i tried it, still open continuity even with various leads.

I hope you took it up with them?