Products > Test Equipment
What are - for you - the 3 biggest disadvantages of your benchtop DMM(s)?
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ferdieCX:

--- Quote from: bdunham7 on September 02, 2020, 09:52:23 pm ---That is a perspective that has changed since the time that this meter was originally built.  Damaged but repairable is now no different to most than destroyed and unrepairable, so there is no point in designing things to fail in a repairable way.  It wasn't always that way.

--- End quote ---
Not for me. For this reason I didn't bought a benchtop DMM and got a Fluke 87V instead. It is cheaper, more robust, and 4 1/2 digits are enough for me
bdunham7:

--- Quote from: tautech on September 02, 2020, 10:06:27 pm ---You repaired it to a condition that works for you, congrats and I mean that however for most that rely on a bench meter for trusted best possible accuracy they would bin it.
Obtaining the equipment to verify its performance will cost more than replacing it.

--- End quote ---

Calibrating it would be part of a proper repair and I will certainly do a complete check at some point.  I understand that the 'average user' doesn't have the means to check the performance, but my point is that in its day, this product would be sent in for service and calibration, not binned.  New stuff, well that does get binned.  But as far as trusting it, at least on the DCV ranges that I've checked so far, it is still more accurate toasted than any product your company sells brand new, so there's that.  :)
ResistorRob:
I just have a hobby level bench meter, but it's very accurate, looks great, and and has everything I need at a great price.
However, it's missing just one feature that I wish it had....

- Data Logging!

If it had that I might cross the Keithley off my lust/dream meter wishlist :-)
(ok, probably not, lol)
joeqsmith:

--- Quote from: Fungus on September 02, 2020, 08:55:49 pm ---
--- Quote from: bdunham7 on September 02, 2020, 04:04:07 pm ---I just took apart an old 8842A that apparently was connected to excessive voltage--at least 1500V---with some power to back it up.  The entire front end protection--4 MOVs and 2 fusible resistors--were incinerated.  I removed the burnt parts and subbed in 2 regular 1K resistors (to be repaired properly later, of course) and the meter works properly and is in cal.  No evidence of any external damage, the circuit board is unharmed (but sooty)  and I'm sure nobody died.  I'd say that is 'robust' although I can't quantify that.

--- End quote ---

Nowhere in CAT documents does it say the the meter should survive.

--- End quote ---

Again, 61010-2-033 section 14.101 states:  "The component shall not rupture and shall operate as intended during the test."   

IMO, operate as intended means just that, the DMM continues to read properly. 

One of the tests I have shown several times is from section 101.3.2.   The criteria, "During and after the test, no damage to the equipment shall occur."  IMO, that's not the test equipment being used to test the DMM they are referring to, it's the DMM.

"After the voltage of 4.4.2.101 has been applied to the METER, the METER shall continue to be
able to indicate the presence of HAZARDOUS LIVE voltages up to the maximum RATED voltage.
NOTE The METER is not required to maintain its normal accuracy. A maximum deviation of 10 % is acceptable."

Of course there are many other cases as I have mentioned before.  But again, just to be clear, this is outside of my area and I am providing my interpretation of what the standard states.    I would find it hard to believe for example that the pass fail criteria for an impulse test would be if the combo generator was damaged or not.    Fungus may see it otherwise.   

That said, I would imagine that some of the meters I have looked at would pass both the safety and EMC standards with a wide margin but there are far more that wouldn't come close.   
zitoune:
I have the Keysight 34461A, and for me the booting time is a disadvantage compared to any handheld DMM.

You cannot do a quick measure on the spot, so most of the time I keep it running for long periods without necessarily using it.
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