Hach-Lange BODTRAK II: Respirometric Biochemical Oxygen Demand (BOD) - Manual (Page 15)

Operation
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4.3 Setting the clock
All channels must show END or CLEAR before the clock can be set. Push and hold
the two arrow keys at the same time until the instrument setup menu is shown.
Select the clock parameter to be adjusted by pushing the applicable channel key
( Table 3 on page 14 ). Use the arrow keys to edit the chosen parameter. Adjust
each parameter in the same manner. When all time adjustments are complete,
push the OFF key to save and go back to the data display screen.
4.4 RS232 Interface
All RS232 connections are made through the Serial I/O port ( Figure 1 on page 12 ).
Connect the 9-pin D connector of a computer interface cable to the Serial I/O port
on the instrument. Connect the opposite end of the cable to the computer Serial I/O
port (Com 1 or Com 2).
The BODTrak II instrument is equipped as Data Communication Equipment (DCE).
The BODTrak II operates at 9600 baud with 8 data bits, no parity and one stop bit.
The computer or printer will not receive complete transmissions if the device cannot
continuously receive at 9600 baud.
Note: Use of the specified cable or an equivalent shielded cable is mandatory to meet Radio
Frequency Emissions requirements.