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Test Equipment Anonymous (TEA) group therapy thread

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mnementh:

--- Quote from: Specmaster on May 23, 2018, 03:06:01 pm ---
--- Quote from: mnementh on May 23, 2018, 02:55:06 pm ---Except you didn't a valid Cal cert, and you were hoping to use this meter to validate the accuracy of your MS7221...

mnem
Fu**... we've just gone recursive again.

--- End quote ---
Trust you to spot the flaw in my logic  :palm: Its going to be more then accurate enough for me when those reading are also supported by, let me see now, about 14 or 15 other meters and it would be an absolute fluke if there all of their game and were all wildly out of calibration  :-DD

Surprising thing that the MS7221 seems to be at full whack of by about 4mV so I think I can live with that knowledge so currently there's no truth in the rumor that I'm just to top myself but I might have a celebratory cup of tea and a biscuit, shouldn't do, I'm big enough already but I feel like celebrating to sod it thats what I'm going to do  :-DD

--- End quote ---

Truly, 'tis a sad, SAD day when I am the voice of reason... ANY reason.  :-DD


mnem
*Currently being rained out for the morning on my Saturn repair project*

mnementh:


Sometimes I think to myself... "Maybe I need to re-evaluate Guugle as my default search engine..."

This it what it returned when I searched for this random CyrusTek-based RF module I found in a kids toy.  :palm:

mnem
Where do they even FIND this sh**?!?

Specmaster:

--- Quote from: bd139 on May 23, 2018, 02:30:07 pm ---I used a function generator and another meter as a reference. You only need to cal on the 3v range. I think you’re just calibrating the AC converter and the rest is based on the DC cal.

--- End quote ---
Am I doing this right, I have my function generator all set up with frequency set to 50Hz, sine wave and output connected a voltmeter and adjusted to read 1V.

3478A set in CAL mode, follow same procedure as for DC, ie, short terminals, blue button, then SGL TRIG button and the display shows 3.0000 and all the other indicators to with CAL mode? Where in blue hell did the 3 come from? There is nothing other than a pair of long nose pliers in the input jacks? 

bd139:
It doesn’t need zeroing on ACV I don’t think. Check the cal steps in the manual!

I did mine with the manual in front of me and carefully followed the instructions.

Specmaster:
So am I, just re-reading the instructions again and it seems I am doing it right, but have to pop out and pick up SWMBO so I'll try it again when I get back. The only thing I'm doing wrong is zeroing it, but that to my mind does not explain why the screen is reading 3.0000 with no input connected?

I have done the 2W resistance cal so now I have DCV, DCA,  \$\Omega\$ 2W and 4W done, its just the AC now and I'll be a happy bunny and less of a grumpy old man  :-DD

I'm very impressed with the little Mastech MS7221 calibrator too, especially at the price I stole it for  :-DD :-DD :-DD

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