Am Sat, 13 Feb 2016 18:41:02 +1300
schrieb "Dave Brown" :
> Cobham is a UK based defence and high end security supplier-
> originally formed (not too many years ago) by their buying out of
> several other companies in their lines of business. More recently
> they have got into aerospace activitie
s@febo.com>
> Sent: Saturday, February 13, 2016 6:00 PM
> Subject: Re: [time-nuts] Calibration procedures - what is normal?
>
>
> On Fri, Feb 12, 2016 at 3:43 PM, Richard (Rick) Karlquist
>> wrote:
>>
>> I left Agilent just before the split, but I don't know
>&
me-nuts] Calibration procedures - what is normal?
On Fri, Feb 12, 2016 at 3:43 PM, Richard (Rick) Karlquist
wrote:
I left Agilent just before the split, but I don't know
anyone there who liked that name. Or the logo :-)
Another recent name change (acquisition) that is even worse is
Aero
Hi,
I had an interesting experience with a local cal lab when I took in my HP
5334B (Option 010). I'd recently purchased the unit and had no idea of its
calibration history. At the time I wasn't quite a time nut, and I didn't
own a reference to check frequency accuracy myself. I was hoping to get
On Fri, Feb 12, 2016 at 3:43 PM, Richard (Rick) Karlquist
wrote:
> I left Agilent just before the split, but I don't know
> anyone there who liked that name. Or the logo :-)
Another recent name change (acquisition) that is even worse is
Aeroflex to Cobham. I realize that Cobham is probably a fa
The consensus seems to be that I was expecting more than I should
have. That's what I get for reading service manuals :-)
Other than the confusion over what I was expecting, I can't fault the
cal lab I sent the meter to. They are charging me a hobbyist-friendly
price and aren't going to charge me
Generally, whenever I've had a non manufacturer 'calibration' it's been a
certification service that tells you your equipment is within spec and
gives you the variances and probability of uncertainty, a pass/fail test.
Where equipment was out of spec then any service to bring it within spec
was u
On 12 Feb 2016 21:12, "Joseph Gray" wrote:
>
> I sent my HP 3457A in for cal. I should be getting it back next week.
> I won't mention where I sent it, but it wasn't Keysight (I don't like
> that name). I recently changed the SRAM battery and purposely did not
> save the cal constants.
You may ha
On 2/12/2016 12:14 PM, Joseph Gray wrote:
I sent my HP 3457A in for cal. I should be getting it back next week.
I won't mention where I sent it, but it wasn't Keysight (I don't like
that name). I recently changed the SRAM battery and purposely did not
I left Agilent just before the split, but I
Joe
I will believe they only do that procedure in a real repair.
I had to do the same thing on a tek 2465b scope. O man what a complete pain
in the rear and literally 8+ hours of work. So I can fully appreciate the
reality that a Calibration is a check and trim for accuracy. Most likely an
hour or
'Normal' calibration is a performance check and adjustments as required
Performance checks are applying stimulus and checking instrument response is
within the acceptable range.
A Full calibration is adjust each parameter to as close as practicable to ideal
value and may include new cal consta
I sent my HP 3457A in for cal. I should be getting it back next week.
I won't mention where I sent it, but it wasn't Keysight (I don't like
that name). I recently changed the SRAM battery and purposely did not
save the cal constants. I bought the meter second hand and it wasn't
in spec when I bough
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