The 9820 has been designed for applications where programmable low value resistance is required such as platinum resistance thermometry.

Each decade is brought out on separate terminals allowing the resistance to be separated into decades and can be used independently if required and precision ratio dividers set up.

The full local control is particularly useful at system design stage and for checking and troubleshooting.

Construction is standard 19” 3U Euro-frame with plug-in modules which allow easy access and improved servicing/maintenance. The unit can be rack mounted or housed in a free standing case. The 9047 bench case is supplied as standard

Programming
The resistance value is set by sending up to 6 numeric digits via the remote interface, either GPIB or RS232 Serial. The least significant digit sets the lowest decade and the most significant digit sets the highest decade. Less than 6 digits can be sent if it is not required to set all decades.

The unit can be sent into local control mode via the remote interface. The setting of the front panel digits switches can then be read back over the bus. The Group Execute Trigger Command (GET) is also supported.