To connect a densitometer to automate reading input you need to attach the densitometer to the PCs serial port using a null modem cable.
Most pcs no longer have a serial port, but you can use a usb to serial adapter, available from computer suppliers.
A null modem cable has the transmit and receive signals crossed.
The DSR/DTR/CTS/RTS signals are usually not used, so these can be looped back.
Specification for a cabler specialist to wire a cable.
Note: The 881/882 has a 10-way socket, but only the centre 8 pins are used for transmitting.
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