Xylem HandyLab 680 - Manual (Page 41)

HandyLab 680 Operation
41 ba77041e01 03/2014
interface without the AutoRead info.
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.
4.7.3 Settings for pH measurements
Overview The following settings are possible for pH measurements:
 Calibration record (display)
 Calibration data storage (display)
 Calibration interval
 Buffers for calibration
 Single-point calibration
 Unit for slope
 Resolution
Settings The settings are made in the menu for calibration and measurement
settings of the pH/ORP measurement. 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 mea-
sured value display with <M>.
Default settings are printed in bold.
3 Release the frozen measured value again with <AR> or <M>.
The [AR] status display disappears. The display switches back
to the previous indication.
Measured
parameter Time interval Stability in the time interval
pH value 15 seconds
Δ
: Better than 0.01 pH
Temperature 15 seconds
Δ
: Better than 0.5 °C
Menu item Possible setting Description
Calibration /Calibration record - Displays the calibration record of the last cal-
ibration
Calibration /Calibration data
storage - Displays the last calibration records (max.
10)