Hach 900 MAX - Manual (Page 81)

Page 79
8990cm.fm Communication Setup
Section 6 Communication Setup
Communication setup details connections and programming features of the:
6.1 RS232 Cable
6.1.1 RS232 Connection
The RS232 connector is a serial input/output port for communicating with a
sampler from an external device such as a Data Transfer Unit (DTU-II) or
direct serial connection to a personal computer with application software.
Cable Required
RS232 Sampler/Flow Meter to PC Cable Assembly (Cat. No. 1727), 10 ft long,
6-pin connector on one end, 9-pin D connector on the other end (9-pin to
25-pin D type adapter included).
6.1.2 RS232 Programming
Note: Some early generation IBM
compatibles may have a serial port
that is not capable of
communicating reliable at 19,200
baud. If errors develop at high baud
rates, try lowering the baud rate one
step at a time (on both the sampler
and Streamlogg II™, InSight
® , or
Vision ® software) until error free
communications is achieved.
1. From the Main Menu, select OPTIONS > ADVANCED OPTIONS >
COMMUNICATIONS SETUP > RS232 SETUP .
2. Select a baud rate for data communications by pressing the CHANGE
CHOICE key to cycle through the possible choices; 1200, 2400, 4800,
9600 or 19,200 baud. The higher the baud rate setting, the faster data will
transfer. Set the baud rate to the highest setting allowed by the computer.
The baud rate must correspond to the baud rate selected in the software.
Press
ACCEPT .
Note: Long runs of RS232 cable, especially if they are run near large motors or
fluorescent lights can cause communication errors and may require a slower
baud rate.
• RS232 Serial Port ( section 6.1 on page 79 )
• Optional Modem ( section 6.2 on page 80 )
• 4–20 mA Option ( section 6.3 on page 87 )
• Alarm Relays ( section 6.4 on page 89 )
• Analog Inputs ( section 6.5 on page 93 )
Table 13 RS232 Connection
Pin Signal Description Wire Color
A not used White
B ground Blue
C DSR Yellow
D RCD Black
E DTR Red
F TXD Green