Ion Selective Measurements - Hach sensION+ MM340 Manual

4. Operation
4.11. Measurement with ion selective electrode
Curve number 1
+
sensION can store in memory up to 4 calibration
™
MM340
curves for each channel .
Measurement by stability
It is the standard measurement mode of sensION+ MM340 . See
details in "pH measurement", page 10 .
Criterion of "rapid" stability: variation < 0 .5 mV in 6 s .
Criterion of "standard" stability: variation < 0 .1 mV in 10 s .
Criterion of "strict" stability: variation < 0 .05 mV in 10 s .
It is highly recommended to apply the same criteria to measure
and calibrate .
Measurement in continuous or by time
See details in "pH measurement", page 10 .
Note: Anyone of the 2 channels can measure pH, mV or ISE .
The measurement units are selected in System .
ISE measurement with printer
See pH measurement with printer in page 12 .
ISE Calibration
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ISE CALIBRATION
Channel 2
Programming ISE calibration.
Curve 1 ISE Calibration
Curve n.:1
...
Stability: standard
Start ISE calibration Units: mol/l
Channel 2
Name of ion: F-
N. of standards: 5
Calibrating ISE F-
ISE Calibration
Curve n. 1 Curve n.:1
Use standard Stability: standard
0.00001 mol/l Units: mol/l
Name of ion: F-
Continue N. of standards: 5
Note: the instru-
ISE Calibration
ment will ask for the
Curve n.:1
Stability: standard
standard with lowest
Units: mol/l
Name of ion: F-
concentration.
N. of standards: 5
ISE Calibration
Curve n.:1
Stability: standard
Units: mol/l
Name of ion: F-
N. of standards: 5
ISE Calibration
Curve n.:1
Stability: standard
Units: mol/l
Name of ion: F-
N. of standards: 5
ISE Calibration
Stability: standard
Units: mol/l
Name of ion: F-
N. of standards: 5
Standard 1: 0.00001
10-04-2010
MEASURE
Curve 1, F-
...
Start ISE calibration
Channel 2
ISE Calibration
Curve no.: 1
ISE Calibration
Stability criteria:
Rapid
Standard
Strict
ISE Calibration
Unidades:
mol/l
g/l
mg/l
mmol/l
ISE Calibration
Name of ion:
F-
ISE Calibration
N. of standards: 5
ISE Calibration
Standard 1(mol/l):
0.00001
etc.
17:15
ISE
Channel 2
Reprogramming ISE measurement conditions.
Measuring conditions
Curve no.: 1
N. of decimals: 6
Measure: stability
etc.
Measuring conditions
Curve no.: 1
N. of decimals: 6
Measure: stability
Measuring conditions
Curve no.: 1
N. of decimals: 6
Measure: stability
Measuring conditions
N. of decimals: 6
Measure: stability
Start measurement
etc.
Curve number
+
1 to 4: The sensION
™
MM340
4 calibration curves for each channel .
Stability criteria: see above "Measurement by stability"
It is highly recommended to apply the same criteria to measure
and calibrate .
Units
mol/l, M, g/l, mg/l, ppm, mmol/l, mM, µmol/l, %: Concentration
units of the calibration standards . The measurement will be
performed in the same units . .
Name of the ion
5 characters to relate the curve with the ion to measure .
Number of standards: 2 to 5
Standards concentration
It is recommended to introduce the standard concentration in
increasing order, starting with the lower concentration . The
instrument will dispose them automatically .
Measuring conditions
Measure with
Curve n. 1
Curve n. 2
Curve n. 3
Curve n. 4
Measuring conditions
Curve n. 1
Number of decimals?
6
Measuring conditions
Measure:
By stability
In continuous
By time
can store in memory up to
15