Function Keys; Serial Interface - Hach POLYMETRON 8811 Manuel D'utilisation De Base

User interface
Front panel description
The interface is via a 4-key keyboard, a 4-digit numeric display and an alphanumeric display of 2-
lines of 16 characters.
Figure 3 Front panel
1 Numeric display
2 Select key
3 Alphanumeric display

Function keys

• Enter: Invoke functions or confirm parameters.
• Select: Select menu options, adjust parameters, exit submenus, and switch between command
and operating mode.
• Scroll down: Adjust variables, scroll through displays in operating mode and submenus in
command mode.
• Scroll up: Same as scroll down but in reverse order, and cancel the system alarm.
Displays
Numeric display: This display shows concentration (default), potential or temperature
measurements.
Alphanumeric display: This display provides messages on status and programming. Messages are
different according to the mode:
• Operating mode: The top line indicates units, measurement type and any activated alarms. The
bottom line indicates the analyzer status, e.g. calibration, titration, etc.
• Command mode: The top line indicates the main menu. The bottom line indicates submenus and
data settings.

Serial interface

The 8811 has two serial interfaces:
• The first one for the communication with a logging device (computer, printer, etc.) can be
configured as RS 232 or RS 485
• The second is dedicated to the communication with the analyzer
On a technical note, the sequencer is the "Master" and the analyzer operates as a "Slave".
Data received by the sequencer
The data are sent in ASCII format as follows:
M1: XXXXXE±XX XXX.X°C XXXXXxxxxxXXX
4 Scroll up key
5 Enter key
6 Scroll down key
English 15