Burkert 8285 El. COND Mode D'emploi page 49

Recommended pH ranges:
10 ± 0.2 for < 136 bars operating overpressure or
9.5 ± 0.2 for > 136 bars operating overpressure
60
µS/cm
50
40
30
20
10
0
0
Conductivity measured after cation exchanger (COND2)
Figure:
Conditioning the feed water of natural circulation boilers with sodium hydroxide. Relationship between
the pH value and the conductivity measured before and after the cation exchanger.
Source: Appendix to VGB guideline for boiler feed water, boiler water and steam of steam generators
above 68 bars permissible operating overpressure (VGB-R 450 L, edition 1988)
10 20 30 40 50
µS/cm
49