[volt-nuts] 3458A Questions - The Sequel
J. L. Trantham
jltran at att.net
Sun Oct 30 00:50:38 UTC 2011
From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
Behalf Of Charles Black
Sent: Saturday, October 29, 2011 3:21 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] 3458A Questions - The Sequel
The RS-232 bus is easy cheap and reliable but too slow for the 3458a.
The 3458A can send a lot of data over the bus very quickly so at the
time the IEEE bus was an easy choice.
I bought the IEEE-488 PCI card on eeBay and also a long long cable.
Later I decided to spring for a GPIB-ENET/100 for $200 to free up the
single PCI slot in my PC and to be able to be further away with out the
long IEEE-488 cable. Both were National products and worked well once
the manual was thoroughly read.
I use National Instruments National Instruments Measurement and
Instrumentation Explorer which is a free download from NI which is part
of the NI VISA install. It can see your IEEE-488 devices and let you
send text commands to them. It also has the Spy program that lets you
monitor the actual text sent and received in real time. Just remember to
alter the ID command test from the *IDN? to ID?. Also "BEEP" works. Case
doesn't matter. You will get a communication error if you don't set
"END" to ALWAYS in the 3458a menu.
I got out my NI GPIB-USB-HS connector, loaded my NI 488.2 on my XP laptop,
and now have been able to communicate with the meter. Thanks very much for
the tip of setting 'END' to 'ALWAYS'. Until I did that, nothing!
Next, I would like to read the contents of the EPROM and read the
calibration settings. So far, I have not been able to solve that.
When I send or 'query' or 'read' 'CALRAM?', all I get back is the current
reading on the meter as it measures my Fluke 731B.
More work to do.
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