Joe,
I don't have any history on my 732As either. M y 3458As & 2002 are out of cal
too so I'm running blind with all my stuff :o)
I'm hoping to find a cheap 732B and have my CAL lab buddy sneak it into work
and do a poor mans cal on it. (hard to do with a 732A)
He does this each year w
Bill,
I have yet to put my 732A though it's paces but I could connect an external
power supply, disconnect the AC supply and the battery module and slowly
decrease the supplied voltage and see what happens when.
I'll try your measurement algorithm for the battery to see when the 'IN CAL'
LED goe
Interesting thought. I love it when guys of that caliber compete.
Joe
-Original Message-
From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On
Behalf Of John Phillips
Sent: Tuesday, December 31, 2013 5:51 PM
To: Discussion of precise voltage measurement
Subject: Re: [vo
Jeff,
Too late.
I have already moved the jumpers and adjusted all of the front panel
adjustments to achieve the desired output voltages.
Since I don't have any 'historical' data about the performance of my specific
unit, I will 'start from scratch' on the unit I now have. Whether to send it
Any thing you do other than record the current voltage reading will
introduce more uncertainty and increase drift unless you have a defect.
Replacing a defective part will start the aging process over again for that
part. Do not change anything if you can help it.
Agilent is a good cal lab to use
Joe:
The NIST notes can be downloaded from this site.
https://archive.org/details/NISTTechNotes
Here is the battery check paragraph. I check mine once and month and plot
performance using Excel.
2-47. OPERATION ON BATTERY
2-48.
Call Agilent about 3458A calibration then tell them that you really want
your fluke calibrated and see what they will do for you.
On Tue, Dec 31, 2013 at 3:48 PM, John Phillips wrote:
> Any thing you do other than record the current voltage reading will
> introduce more uncertainty and increase
The obvious reason for that suggestion is the adjustment
pot is likely to be noisy and is likely to introduce
uncertainty.
The big question that comes to my mind is if you care about
that level of uncertainty, why not replace the pot with a
voltage divider made of some low thermal coefficient fix
Hi,
Are you guys adjusting your 732As?
I have a friend that works in a large CAL lab and he told me to never adjust my
732As, just compare them.
They send out their 732 Bs to Fluke but are never adjusted, just compared and
sent back with current voltage reading ??
Thanks - Jeff
A used Guildline 9975 DC Current Comparator Resistance Bridge arrived in a big
box yesterday. After some repairs, the unit appears to work, but I have never
used one of these bridges before.
Why do I say it appears to work? Here are two measurements comparing one Ohm
resistors at 30 mA current:
Joe wrote:
Where did you find the resistance of the thermistor 'as shipped'? I saw
mention of being supplied to the original owner when shipped as well
It was recorded on the original factory cal certificate. I have the
original certificates for two of mine. The others had rear panel
stic
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Joe,
I live in Florida and searched for cal labs here that could do the job of
calibrating references. Lockheed Martin in Orlando is certified, but may not
have the best uncertainties. Fluke shows 0.3uV/V where LM shows 0.35uV/V.
Tektronix in Orlando also offers calibration, but they ship it out a
I was afraid of that.
Joe
-Original Message-
From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On
Behalf Of R.Phillips
Sent: Tuesday, December 31, 2013 7:53 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Fluke 732A Questions
Joe
Reference the
Joe
Reference the thermistor value and its recorded value - I asked Fluke this
question and the answer was, they did supply the individual 732A's value in
written form to the original purchaser, but unfortunately they did not
maintain a separate record.
Roy
-Original Message-
From: J
Charles,
I would like to find the mating plug for J10 for several reasons, being able
to get it to calibration being just one of them. However, I was hoping it
would be good enough to make it to calibration on the internal batteries.
I seem to recall reading that the internal batteries were good
> Date: Sun, 29 Dec 2013 21:44:03 +0100
> From: frank.stellm...@freenet.de
> To: volt-nuts@febo.com
> Subject: [volt-nuts] Fluke 845 Modification
>
> The Fluke 845 is famous for its high resistance measurements, due to the
> differential principle.
> But its
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