User guide

I-E67-84-1B February,2002 A-3
analyzer.
T = Temperature of the solution in C
o
after applying the factory and
process calibration values.
For example, solution coefficients for pure
water applications are:
Pure Water = +0.18 pH/10 C
o
Pure Water w/ 1ppm Ammonia = +0.31 pH/10 C
o
For the TB84PH Advantage Series analyzer, the
solution coefficient will either add (+) or
subtract (-) a configured amount of the
process variable per 10 C to the Nernstian
o
compensated process variable. Thus, an
application having a process liquid that
decreases in its pH value as the temperature
increases should use a positive (+) solution
coefficient correction factor. Conversely, an
application having a process liquid that
increases in its pH value as the temperature
increases should use a negative (-) solution
coefficient correction factor. For ORP and
pION analyzer types, the solution coefficient
adjusts the uncompensated process variable and
does not use the Nerstian relationship.