in figure. If user wants to restart correction, choose to delete, or else choose to
keep. For example, the last calibration use 146
μ
S/cm and 1408
μ
S/cm to
complete two point correction, but user only wants to re-calibrate point
1408
μ
S/cm, then can choose to keep current calibration data.
Keep Last Calib Data Diagram (Figure 8)
The meter adopts the navigational direction calibration, users complete the
correction in accordance with the instructions step by step.
2.6.2 Before calibration
The conductive probe will have some drift under different service environment
or unused for a long time, and need to re-calibrate with the conductivity
standard solution, the meter is up to 2 point calibration.
The meter supports automatic identification of conductivity standard solution,
the default
four standard solution. Standard data obtained by potassium chloride solution,
the
nominal concentration respectively is 1 mol/L , 0.1 mol/L, 0.01 mol/L, 0.001
mol/L.
There are usually two methods to get conductivity standard solution: Self-
preparation,
purchase directly.
First, prepare conductivity standard solution by themselves. To prepare standard
solution refer to the following data:
KCl Standard solution for testing Cell constant
Cell constant
(cm
-1
)
0.01
0.1
1
10
KCL solution
concentration(mol/L)
0.001 0.01 0.01
or
0.1
0.1 or 1
