Hach ORBISPHERE 3658 Manuel D'utilisation Simplifié page 8

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.
3.4.3 External power supply (optional)
The instrument is usually powered by the batteries supplied. You can, however, power it from an
external power source using the model 32939 power supply adaptor as illustrated in
Figure 2 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.
3.5 Instrument location
Locate the instrument close to the sample being analyzed, and to the PC if one is being used. A
LEMO-6 connector for RS-232 serial output to a PC is on the right side of the instrument (No. 6 in
Figure 1 on page 6).
8 English
LEMO-6 Pin Description
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
Figure 2.