• in a place where the sample flow is stable and rapid, and as far as possible from:
• valves
• pipe bends
• the suction side of any pumps
• a CO
injection system or similar
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Note: There may be situations where not all the above conditions can be met. If this is the case, or you have any
concerns, please consult your Hach representative to appraise the situation and define the best applicable solution.
Section 5 User interface
5.1 Instrument controls
The instrument front panel provides:
• A touch screen acting as display, touch pad and keyboard.
• A LED, showing when the instrument is on.
Turning instrument On and Off
There is no power switch on the instrument. The mains must be disconnected to turn the instrument
off.
Measurement window
The main (numeric) measurement window continuously displays:
• Sensor measured values
• Measured sensor trends (for the last 10 minute to last hour)
• Measured sensor data alarm limits and other events
• Temperature
5.2 Touch screen
The user interface on the front panel is a touch screen providing easy selection through menus. All
the measurement, configuration, calibration and standard service routines can be called by pressing
buttons and menu bars on screen.
The display can be configured to only show a sensor measurement, or to show a parameterized
graphic representation of the last measurements.
5.3 Menu navigation
Pressing the "menu" button in the header bar calls the main menu. The
display is made of three columns:
• The left shows the menu options
• The center shows a tree view of the position inside the menu
structure
• The right has the following generic controls:
• Up - Return to previous menu (one step back)
• Main - Jump directly to main menu
• Close - Close the menu and go back to the measurement display.
• Help - Help topics concerning current menu
5.4 Virtual keyboard
When a value or text is to be edited a virtual keyboard will appear on screen and can be used like a
standard keyboard. Press CAP to access special keys. When input is complete press the Enter key
to confirm and exit the virtual keyboard. During editing, the edited field name is displayed along with
units where applicable.
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