Ofs udox, Руководство по эксплуатации

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10
10.3 Switch off the hand-held meter
Display illumination
If a key is not pressed for two minutes, the hand-held meter reduces display brightness to protect
battery life. The illumination switches back on the next time any key is pressed.
If a key is not pressed for five minutes, the hand-held meter switches off automatically.
The device can be switched on or off manually at any time using
[ON/OFF].
10.4 Navigation / Program guides
In the measurement view, use [MENU] to open the sub-menus for sensor-dependent and sen-
sor-independent settings.
Use
[▲]
or [▼] to toggle between calibration analysis and measurement setting. Use [OK] to
open the sub-menu and go to more functions.
Use
[◄]
to leave the current setting and go back to the sub-menu. Current calibrations or meas-
urements can be aborted at any time.
11. Calibration
Why is calibration necessary?
Because sensors age and change their behaviour. This leads to imprecise measurements. Cali-
bration continuously updates the internal behaviour parameters. Precise calibration as per the
directives is important. Aged or mixed calibration solution or unstable measured values cali-
brate a sensor wrongly, which makes subsequent measurements faulty.
When should calibration be done?

When analysing water with very large, different ionic strengths

The calibration interval of 30 days has expired.
As the need to calibrate a sensor depends on a number of conditions, the user is reminded to re-
calibrate by the text “Calibrate sensor” flashing 3 x in the main menu after switching on 30
days after the last calibration of the µdox hand-held meter.
This display is only intended as a note and reminder.
Main menu
calibration
special functions
sensor information
measurement sites/data
measurement units
options
about us
[OK]
[OK]
[
▲
]
or
[
▼
]