Hach 3650 manual Instrument PC Connection

10 of 50 Installation - 3650 Portable O2 Analyzer

1.5.2 Instrument - PC Connection

An RS-232 cable is supplied with the instrument, with a 6-pin LEMO plug on one end and a 9-pin D-Type plug on the other.

Fig 1-6: Instrument to PC Connections

Pin	RS232 Signal
Pin 1	Transmitted data (TXD)
Pin 2	Received data (RXD)
Pin 3	Not Used
Pin 4	Not Used
Pin 5	Not Used
Pin 6	Ground

Pin	Use
Pin 1	Not Used
Pin 2	RS-232 Transmitted Data (TXD)
Pin 3	RS-232 Received Data (RXD)
Pin 4	Not Used
Pin 5	Ground
Pin 6	Not Used
Pin 7	Not Used
Pin 8	Not Used
Pin 9	Not Used

Note:

If you use an adapter for the connection to the PC, make sure it is designed for this purpose and, thus, has all nine pins accessible. Some 25-to-9 pin adapters are supplied for specific use, such as a mouse, and these may have only certain pins available.

It is not necessary to keep the PC connected to the instrument during measurement. This connection is required for downloading stored measurements, real-time monitoring, reviewing and changing configuration parameters and testing the instrument from the PC (see “Troubleshooting” on page 38 for details).

ORBISPHERE Operator Manual