ProLab 4000
Ion concentration
111
ba75646e03
12/2012
9.4
Blank value correction
If the ion concentration in the sample is so small that it is not in the lin-
ear range of the electrode, you can increase the ion concentration in
the linear range with the blank value correction by the addition of a
blank value solution.
The displayed measured value is the difference between the actual
measured value and the determined blank value.
Calibration
Measuring
1
In the
Measuring
/
ISE Setup
menu, select and confirm the
menu item,
Blank value correction
.
The
Blank value correction
function is active (
✔
).
2
Carry out a 2 to 5-point calibration according to the user guide
(see page 106).
As soon as a stable value is achieved for the standard calibra-
tion solution, the slope (mV) and evaluation (Error, +++) of the
electrode after calibration is displayed.
The infotext,
Accept calibration and terminate
is displayed.
3
Using
[OK]
, confirm the infotext
Accept calibration and termi-
nate
.
The calibration record is displayed and output to the interface.
The calibration procedure is finished.
4
Close the calibration record with
[OK]
.
The prompt for the measurement of the blank value appears.
5
Thoroughly rinse the electrode with deionized water.
6
Immerse the electrode in the blank value solution.
7
Start the measurement with
[Continue]
.
The measured value is checked for stability (Stability control).
8
Wait for the measurement with stability control to end.
or
Take over the measured value with
[OK]
.
The calibration record is displayed and output to the interface.
The calibration procedure is finished.
9
Close the calibration record with
[OK]
.
Summary of Contents for ProLab 4000
Page 4: ...ProLab 4000 4 ba75646e03 12 2012...
Page 10: ...Contents ProLab 4000 10 ba75646e03 12 2012...
Page 20: ...Overview ProLab 4000 20 ba75646e03 12 2012...
Page 30: ...Commissioning ProLab 4000 30 ba75646e03 12 2012...
Page 68: ...System functions ProLab 4000 68 ba75646e03 12 2012...
Page 138: ...Ion concentration ProLab 4000 138 ba75646e03 12 2012...
Page 184: ...Recorder ProLab 4000 184 ba75646e03 12 2012...
Page 202: ...What to do if ProLab 4000 202 ba75646e03 12 2012...
Page 216: ...Lists ProLab 4000 216 ba75646e03 12 2012...
Page 227: ......