Bill,
I have convinced myself that the problem I an seeing is due to thermals.
If I move the cables (with gold-plated banana plugs) using a small towel
rather than letting my hand touch the plugs, it is much more stable. If I
then hold the banana plug with my hand after the reading has
Bill,
I use a lot of the 12v 7ah batteries for my UPS backups and 732B. But yes,
I was mistaken. The 12V 5ah batteries are the ones that I am using in one
of my 732A. There is more play inside the tray with the 12v batteries by
several mm as compared to the 6v which only has a 2-3mm. The 12v
Would anyone have a spare key I could purchase? I understand that you can
simple bypass the key with a shorting switch, but I am trying to keep my
setup looking as authentic as possible. Thanks!
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Chris,
Where do you live? I just had some keys made last week for my Datron units.
The first set fit my 4000A and 1071, but they did not fit my 4700. The
4000A key looked more like the pictures online, but the 4700 was completely
different.
Someone may have rekeyed or damaged the lock on the
Bill,
I have never been able to use banana plugs of any kind, with my 3458A,
due to their excessive thermal mass. I use 24 gauge wires to make a
twisted pair by hand with no connectors for precision voltage work. As
brought out in an earlier post by acbern, it doesn't matter about
plating or
In message CALwLtXwi-mABsNta=rohet9d6b4nyn9vft6bbwzy20vdqsq...@mail.gmail.com
, Todd Micallef writes:
Please notice that when you read the HP3458A over GPIB you get a
slightly higher precision due to more decimals being presented,
than you do on the display.
If you are measuring down
Randy all,
You have correctly concluded that some (maybe not all) of your measurement
problem is thermal EMF being added or subtracted in series within your
measurement interconnect. This thermal EMF is generated at the junction of
dissimilar metals when accompanied with thermal gradients
Todd:
I check the batteries every month per the 732A manual. Usually I keep a
few used cells from previous packs around that seem to be ok after checking
them for capacity just like checking the battery pack. I can usually spot
cells going bad with that method. If I don't have a spare set
Randy:
The MATH function is accessible from the keypad. I don't have an IEEE
interface right now that works. You can also program the numeric keypad
keys to have preprogrammed functions. DEFKEY
I have made my own low thermal measurement leads from Pomona #4892
banana plugs and Belden
Bill,
Thanks for the MATH overview. That could be very helpful. I definately
will give it a try.
Randy
On Sun, Aug 24, 2014 at 2:44 PM, Bill Gold wpgold3...@att.net wrote:
Todd:
I check the batteries every month per the 732A manual. Usually I keep
a
few used cells from previous
Bill,
I am trying to figure out the MATH function without much success. The 3458
On Sun, Aug 24, 2014 at 4:46 PM, Bill Gold wpgold3...@att.net wrote:
Randy:
The MATH function is accessible from the keypad. I don't have an IEEE
interface right now that works. You can also program the
Bill,
I am trying to figure out the MATH function without much success. I input
the sequence you said (I looked up the instructions to understand what you
did - seems logical), BLUE DEFKEY BLUE F1 MATH 14;NRDGS 40;TRIG 4;TRIG; and
it shows up on the display when I input BLUE F1. I hit ENTER and
Hi Randy,
You can use the NPLC command to change the A/D converter's'integration
time. Set it to 1000 if you want full resolution. It sets the hp3458a's NMR.
Charlie
On 8/24/2014 6:04 PM, Randy Evans wrote:
Bill,
I am trying to figure out the MATH function without much success. I input
On Sun, Aug 24, 2014 at 1:46 PM, Don@True-Cal truecalservi...@gmail.com
wrote:
Randy all,
You have correctly concluded that some (maybe not all) of your measurement
problem is thermal EMF being added or subtracted in series within your
measurement interconnect. This thermal EMF is generated
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