Xylem HandyLab 680 - Manual (Page 68)

Operation HandyLab 680
68 ba77041e01 03/2014
Criteria for a stable
measured value
The Stability control function checks whether the measured values are
stable within the monitored time interval.
The minimum duration until a measured value is assessed as stable is
the monitored time interval. The actual duration is mostly longer.
4.9.3 Settings for D.O. sensors
(menu or measurement and calibration settings)
Overview The following settings are possible for D.O. sensors:
 Calibration record (display)
 Calibration data storage (display)
 Calibration interval
 FDO Check
 Check interval
 Salinity correction
 Salinity (salinity equivalent)
Settings The settings are available in the menu for measurement and calibration
settings. To open the settings, display the required parameter in the
measured value display and press the <MENU/ENTER> key. After
completing the settings, switch to the measured value display with
<M>.
Measured
parameter Time interval Stability in the time interval
D.O. concen-
tration 20 seconds
Δ
: Better than 0.03 mg/l
D.O. saturation 20 seconds
Δ
: Better than 0.4 %
D.O. partial
pressure 20 seconds
Δ
: Better than 0.8 mbar
Temperature 15 seconds
Δ
: Better than 0.5 °C
Menu item Possible
setting Description
Calibration /Cali-
bration record - Displays the calibration record of the
last calibration