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The last lot of the AVS47-IB interfaces has a new enclosure.
After this lot, the product will be discontinued. 2020-10-04 few units are still available.

Low-EMI IEEE-488 Interface

Low emission level of high frequencies is one of the most important things to consider when selecting instruments for low-temperature thermometry. In the AVS-47B AC Resistance Bridge, this goal was achieved by
  • using analog design instead of fast programmable digital electronics,
  • by dividing the instrument up into two separate units, a small preamplifier that helps one to keep the sensitive sensor wires short, and a 19" main unit for rack mounting,
  • by building a hardware-only low-level remote interface called "Picobus" into the main unit. Picobus is a serial, synchronized, galvanically isolated protocol that requires four signal wires for duplex communication between the bridge and the external computer. It comes with every bridge. Because of its bit-level operation, use of the standard Picobus interface ("Primary Interface") as such is tedious. Therefore we support it by providing a free extensive set of LabView Virtual Instruments (Vis). This support is, however, limited to PC-type computers running Windows and at least the base version of LabView2012 or newer. Other types of computers, operating systems and programming languages are supported by our Serial/USB and GPIB protocol converter options.


    The AVS47-IB makes a protocol conversion between Picobus and IEEE-488. This option is a mains-powered 210x160x65mm metal box that is galvanically isolated from the AVS-47B bridge. It is intended to be located outside the shielded cryostat space. Standard length of the interconnection cable is 5m, and a 10 meter cable is available as an option. An ultimate safety against possible RF leakage is achieved by replacing the wire cable by the Model AVS47IB-Picolink optical fibre link option.

    The AVS47-IB offers a wide set of basic write and read commands for the AVS-47B and also for the old TS-530A Temperature Controller. It can take averages and calculate min/max/std statistical data. It can maintain a running average of the selected sensor to be read when needed. Up to 8 sensors can be scanned automatically and the scanned data can be buffered for later reading. The talker/listener interface is highly compatible with the IEEE-488.2 programming standard with error reporting and common commands. For more information on the AVS47-IB features, please refer to the command summary and to the user guide.

    A free LabView Driver, saved in LV7.1, is available for the AVS47-IB. Despite its age, the driver is still valid for new LabView versions. A general description and a user guide are found on the LabView Driver -pages (see below).

    AVS47-IB Command Summary and other specifications     
    AVS47-IB User Guide      
    AVS47-IB LabView Driver     
    AVS47IB-Picolink     Optical Fibre Link Option
    Alternative AVS-47B Configurations      Illustration of various configurations

    FI-01510 VANTAA