Xylem ProLab 2000 - Manual (Page 55)

ProLab 2000 Operation
55 ba75577e05 11/2013
Note
You can terminate prematurely the manual Stability control function
with <MENU/OK> manually at any time. If the manual Stability control
function is terminated prematurely, the current measurement data is
not downloaded to the interface.
Criteria With identical measurement conditions, the following applies:
Temperature while
calibrating and
measuring
For precise ISE measurements the temperature difference between
measurement and calibration should not be greater that 2 K. Therefore,
adjust the temperature of the standard and measuring solutions
accordingly. If the temperature difference is greater the [TempErr]
warning appears in the measured value display.
4.6.3 Settings for ISE measurements
Overview The following settings are possible for ISE measurements:
 Calibration record (display)
 Calibration history
Settings The settings are made in the measuring menu of the ISE
measurement. To open it, activate the relevant measuring window in
the measured value display and press the <MENU/OK> key. After
completing the settings, switch to the measured value display with
<MODE>.
2 Freeze the measured value with <SC>.
The display switches to the display of the selected channel as
necessary.
In the status line, [SC] is displayed.
3 With <MENU/OK> activate the Stability control function.
[SC] flashes while the stability control is active.
As soon as a stable measured value is recognized, the current
measurement data is downloaded to the interface. The
measured values of all channels meeting the criterion for
stability control are marked by SC.
4 Using <SC> or <MODE>, release the frozen measured value.
The [SC] status display disappears. The display switches to the
previous indication.
Measuring signal Reproducibility Response time
Electrode
voltage better than 0.1 mV > 30 seconds