The HM8115-2 is a programmable 8kW Power-Meter supplied by HAMEG Instruments.
In order to integrate this meter into a Unix based infrastructure (computer controlled experiments and measurements) an ethernet interface would be desirable.
We make use of the following ethernet to serial adaptor (WIZ110SR) offered by WIZnet.
This adaptor comes with a config program that allows to set the IP-Address and serial parameters. Unfortunately the WIZnet config tool is available for Windows only. We use VirtualBox to virtualize a WinXP instance under MacOSX and set the parameters as follows.
We open a TCP socket to 192.168.1.9 (configured IP-Address) and port 5000 and send the ASCII command *IDN? followed by <CR>. The device replies with HAMEG HM8115-2!
All that is left to do now is to somehow mount the WIZnet board plus a power supply into the HAMEG case. We turn around the serial interface and solder three wires to the SUB-D pads 2, 3 and 5.
We solder a three wire interface together
- PIN2 —– PIN2
- PIN3 —– PIN3
- PIN5 —– PIN5
and give it a first shot.
All that is left to do now is to somehow mount the WIZnet board plus a power supply into the HAMEG case. We turn around the serial interface and solder three wires to the SUB-D pads 2, 3 and 5.
We get back to our MacOSX machine in the office and write a little Objective-C application that establishes a TCP connection to the WIZnet board sends commands and displays responses.
This works like a charm. The wattage can easily be extracted from the returned string. The HAMEG can now be remote controlled and easily integrated into computer controlled experiments.
source : http://www.advanced-science.com/HAMEGEthernetInterface.html
Tags : W5100, WIZ110SR
Author : Advanced-Science
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