Ion concentration
ProLab 4000
112
ba75646e03
12/2012
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 106).
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.
Содержание ProLab 4000
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