Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 112)

Ion concentration ProLab 4000
112 ba75646e02 01/2010
9.5 Reference measurement
A reference measurement enables you to assign any concentration
value to the calibration curve of your electrode for a specific ion con-
centration (reference concentration).
Prerequisite: A valid calibration must be available.
Determining the
reference value and
activating reference
measurement
Switching off the
reference measurement
Activating reference
measurement with
existing reference value
If a reference value was determined but the reference measurement
was switched off, the reference value does not have to be determined
again if you want to measure with the reference. The meter has stored
the last reference value with the respective concentration.
1 Only if no valid calibration is available
(no sensor symbol on the measured value display):
Perform a calibration (see page 103).
2 Prepare the solution with reference concentration.
3 Open the Measuring / Input reference value...ISE settings
menu.
The window for the entry of the reference value pops up.
4 Enter the reference value and confirm with [OK].
The [ISERef] symbol is displayed in the status line.
The measurement with reference value is active.
1 In the Measuring / ISE settings menu, select and confirm the
menu item, Reference measurement.
The Reference measurement function is switched off.
The [ISERef] symbol disappears from the status line.
1 In the Measuring / ISE settings menu, select and confirm the
menu item, Reference measurement.
The Reference measurement function is activated.
The [ISERef] symbol is displayed in the status line.