Xylem 3101 CONDUCTIVITY CONTROLLER User Manual
Page 10
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XIII) Cell constant
a) The model 3101 is designed for use with conductivity probes of 1.0 cell constant.
XIV) Calibration using standard solutions
a) Rinse the conductivity probe with de-ionized water or the standard solution.
b) Immerse the conductivity probe in the standard solution .Choose the standard
solution closet to the value of the sample solution .Refer to table 2.
c) Set the Cell adjust control on the front panel for the meter to display the value of
the standard solution.
d) The instrument is calibrated and ready for measurements.
Table 2
Standard solution
Instrument range
Meter display value
A
0 to 999 µS/cm
147
B
0 to 9.99 mS/cm
1.41
C
0 to 99.9 mS/cm
12.9
D
0 to 200 mS/cm
111
XV) Preparation of standard solutions
a) Solution A- dilute 100ml of solution B to 1000ml with deionized water.
b) Solution B- weigh out (in air) 0.7440g research grade KCL and to 1000ml with
deionized water.
c) Solution C- weigh out (in air) 7.4365g research grade KCL and to 1000ml with
deionized water.
d) Solution D- weigh out (in air) 74.2640g research grade KCL and to 1000ml with
deionized water.
XVI) Conductivity measurement
a) The instrument must be calibrated with standard solution before use, as the cell
content is slightly different for each conductivity probe.
b) Rinse the conductivity probe with de-ionized water or the standard solution.