wtw inoLab 740, Руководство по эксплуатации

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Ion concentration
109
7.3.2 Four-point to six-point calibration
For the inoLab Level 3 pH/ION measuring module.
Beyond the three-point calibration, a four-point, five-point or
six-point calibration is also possible in the pH/ION
measuring module.
Use different standard solutions for this. The standard
solutions have to be selected in either increasing or
decreasing order.
Note
The measurement precision is also dependent on the
selected standard solutions. Therefore, the selected
standard solutions should cover the expected value range of
the subsequent concentration measurement.
Standard
solution Values [mg/l]
Std 1 0.01; 0.02; 0.05; 0.1; 0.2; 0.5; 1; 2; 5; 10; 20;
50; 100; 200; 500; 1000
If Std 2
>
Std 1, Std 3-6 must be
>
Std 2
If Std 2
<
Std 1, Std 3-6 must be
<
Std 2
Std 2
Std 3
Std 4
Std 5
Std 6
1 Perform a three-point calibration (see section 7.3).
2 Continue to the four-point to six-point calibration with
g
.
The previously set up concentration of the next
standard solution appears on the display.