- Manuals and service information
- Agilent E5810 design and teardown
- Firmware upgrade
- VXI support with python in linux
We have used linux-gpib with both NI GPIB-USB-HS and 82357B for few years already, using Raspberry Pi 1, 2B and 3B hosts, as well as Terasic DE1-SoC hosts. Instruments were controlled by python applications to collect samples and data for live view and analysis.
However USB interface can be tricky to operate flawlessly for long periods of time, and sometimes we had random hangs or time-outs with various Raspberry Pi configurations. Dedicated LAN-GPIB gateway would hopefully fix these issues completely, and also make it independend from host kernel driver/library support, as all GPIB control code now would run on gateway instead. So when opportunity presented itself to grab one of Agilent E5810A’s for <100$ USD, it took no thinking to make a deal.
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If you willing to contribute or add your experience regarding instrument repairs or provide extra information, you can do so following these simple instructions
Manuals and service information
Agilent E5810 design and teardown
Unit is thin, have half of 19” width. Due to light weight, it is easy to install it on rack mount.
Cooling air enters unit from rear and side vents.
Unit arrived with very old firmware, rev.1.02.
After following manual for upgrade, and pointing it to our repository with latest rev.1.10 firmware. unit was updated sucessfully.
All firmware files we have are available for download. Keep in mind, these are for E5810A model, not the newer E5810B!.
|Firmware version||Fixed items|
|E5810A Rev. A.01.10, 10/10/2011||Fixed password special character recognition, viewable password on ‘view source’ page, session URL from by-pass password page.|
|E5810A Rev. A.01.09||Fixed LED Sequence|
|E5810A Rev. A.01.08||Fixed instruments to stay REMOTE connection whenever a data transaction times out|
|E5810A Rev. A.01.07||Fixed ftp (ftp.agilent.com) firmware update issue, Firmware A.01.06 or below only able to update firmware through local ftp server.|
|E5810A Rev. A.01.06||Phy chip change (P1001 board)|
|E5810A Rev. A.01.05, 11/29/2007||Fixed P1001 Board Lan check issue|
|E5810A Rev. A.01.04, 10/26/2007||Fixed Guide Tech EOI issue|
|E5810A Rev. A.01.03, 6/14/2006||Fix the hang issue when the DHCP option 150 is turned on|
|E5810A Rev. A.01.02, 9/22/2003||Turn off IP forwarding to prevent forwarding of malformed IP packets|
E5810 boots quickly, under 15 seconds, including DHCP discovery on LAN.
VXI support with python in linux
It is possible to use the E5810A LAN/GPIB gateway with any VISA implementation that supports TCPIP (LAN) resources and the industry standard VXI-11.2 TCP/IP Instrument Protocol.
To use this gateway in linux environment with python, very simple guideline as below is followed. Create folder (for example /home/vxi).
Enter directory and get SVN repository for python-vxi
svn checkout https://github.com/python-ivi/python-vxi11
Enter /home/vxi/python-vxi11/trunk directory
python setup.py install
Now python-vxi should be installed on your DE1-SoC platform
Here’s example python app to talk with VXI instrument:
import vxi11 instr = vxi11.Instrument("192.168.0.8", "gpib0,3") instr.timeout = 30 print(instr.ask("*IDN?"))
Make sure to type “gpib0,3” in lowercase, and don’t put any spaces between the comma and the instrument address.*. Number 3 here is GPIB instrument address.
Timeout setting to 30 change the GPIB I/O timeout delay, it is important for long operations when instrument might not reply in default timeout time. This is important for example for resistance measurements with NPLC100, OCOMP and DELAY 3 with HP 3458A instruments.
In case of correct installation and connection reply can be as below:
Keithley Instruments Inc., Model 2636B, 1234567, 3.2.1
Below are actual photos of E5810A controlling test DMM:
Image 14-16: E5810A booting process and first test results with Keithley 2002 DMM
Reading remote instrument status
Often it is important to read GPIB instrument status register, for example to check if device is busy or require attention to handle error/exceptions. One of such practical examples when this is essential – calibration procedures of Keithley DMMs, as internal calibration process may take multiple minutes. During this time it is expected that GPIB master (E5810A in this case) poll status register over GPIB bus to determine when instrument is ready to proceed next calibration step.
Code snipped below allow to read status register:
import vxi11 def read_status(self): inst = vxi11.Instrument("192.168.0.8", "gpib0,3") reg = self.inst.read_stb() return reg
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Modified: Nov. 20, 2018, 7:36 p.m.