[volt-nuts] HP 3458A/HFL : looking for information/photos/fw

[Tom Knox]

Purchased new the HFL 3458A is exceptional. That said, it is my understanding that the HFL has the exact same circuit topography but uses select parts. Now here is where things get fuzzy, in the case of used 3458A's the parts often improve with age. So it is difficult to know without characterizing you meter as it ages as well as detailed knowledge/data on other 3458A's the degree of improvement if any and therefore whether the expense would be justified. Or if the new components would age as gracefully. I am not sure of exact firmware differences, perhaps someone can add information on that. Over the years I have seen a number of 3458A regardless of options that dramatically exceed their specs. The point is if you have one of those "golden" 3458A's don't let go of it. I hope that helps.

Cheers;


Thomas Knox



________________________________
From: volt-nuts <volt-nuts-bounces at febo.com> on behalf of John Phillips <john.phillips0 at gmail.com>
Sent: Tuesday, September 13, 2016 10:23 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] HP 3458A/HFL : looking for information/photos/fw

While talking with hp I was told the options Fluke orders. All are
available to anyone who wants to buy one.

On Tue, Sep 13, 2016 at 9:06 PM, Illya Tsemenko <illya at xdevs.com> wrote:

> Hello to all volt-nuts,
>
>
>
> Considering to pimp-up my DVM for a while, but would like to know first if
> anyone here saw actual PCB photos or have any information of what hardware
> actually different in Fluke's HFL version of 3458A. Based on Fluke's manual
> DC reference (A9 PCBA) and reference resistors on A1 PCBA got improvements.
> Firmware is also likely to be bit different, as HFL comes with
> preprogrammed macro's on keypad.
>
>
>
> If anyone have information about HFL, or have access to such instrument,
> I'd appreciate any hints and details.
>
>
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--

*John Phillips*
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