J.P. SELECTA MP-2006 Manual De Instrucciones página 95

ii. Wash the conductive electrode with distilled water.
iii. Insert conductive electrode into standard solution.
iv. Control solution's temperature as (25.0 ± 0.1)
0.1)
v. Press 'STD' key, select 'Cell Constant' and confirm to enter into cell constant standardizing
status which is displayed as follows:
vi. Press 'SETUP' button, input the relevant figure in chart 3, i.e. present standard solution's
conductivity.
vii. When reading figure stable, you can press 'ENTER' key, meter will automatically calculate
new electrode constant value, calibration finishes. Press 'END' key, meter stops the electrode
constant calibration.
Chart 1 KCL standard solution for measuring cell constant
Electrode constant (l/cm)
KCL solution approximate
concentration (mol/L)
Chart 2 Compound of standard solution
Approximate
concentration (mol/L)
0.01
0.001
Chart 3 Relationship between KCL solution approximate concentration and conductivity
appro. Temp.
conc. (mol/L)
1
0.1
0.01
0.001
0.001
Volume concentration KCL(g/L) solution
1
0.1
dilute100mL 0.01mol/Lsolution to 1L
15.0 18.0
12120 97800
10455 11163
1141.4 1220.0
118.5 126.7
or (20.0 ± 0.1)
Cell constant standardization
0.01 0.1 1
0.01 0.01or 0.1
(20 in air)
74.2650
7.4365
0.7440
20.0 25.0
101700 111310
11644 12852
1273.7 1408.3
132.2 146.6
or (18.0 ± 0.1) or (15.0 ±
10
0.1or 1
30.0
131100
15353
1687.6
176.5
92