ELMETRON CC- 411, User Manual, Page: 22 / 52

- 16 -
User’s manual for CC-411 conductivity meter v5.30
8. CHOICE AND MAINTENANCE OF THE CONDUCTIVITY CELL
8.1. Choice of the conductivity cell
Conductivity in CC-411 meter can be measured in range
0 – 100 mS/cm. The meter co-operates with conductivity cells with K constant
= 0.050 ÷ 1.500 cm-1 and equipped with BNC-50 connector. Depending on
the required measuring range it is necessary to choose appropriate cell with K
constant which enables obtaining accurate results. Beyond the range the cell
looses its linearity and the results have greater error. Accurate measurements
in the whole range are possible with use of 2 different conductivity cells.
In range 1 – 100 mS/cm the standard conductivity cell with K constant =1 cm-
1 should be used.
For measurements of ultra pure water with conductivity below 1
µ
S/cm a cell
with K constant = 0.1 cm-1 should be used.
Depending on the expected measuring range, choose the appropriate cell
using the chart below (Pic.6).
Pic. 6. Dependence between the measuring range and of applied conductivity
cells.