Hach ORBISPHERE 3654 Basic User Manual page 10

Figure 3 Model 32939 power supply
Connect the male LEMO-6 plug on the power supply adapter, to the RS-232 connector on the right
side of the instrument. The female LEMO-6 plug can then be used to connect to your PC using the
standard RS-232 cable supplied with the instrument.
Plug the transformer into your mains power supply using the cable supplied.
Note: If the external power supply is not clean, this may result in unstable measurements.
4.7.2 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.
Connection
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.
10 English
LEMO-6 Pin Description
Pin 1 Transmitted data (TXD)
Pin 2 Received data (RXD)
Pin 3 CTS
Pin 4 RTS
Pin 5 Not used
Pin 6 Ground
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 Request to send RTS
Pin 8 Clear to send RTS
Pin 9 Not used