Burkert 8285, Instruction Manual

Page: 45 / 288

45
Calculation formulas
Module combinations, Calculation Block, process variables
Measured
variable Calculation formula Range Span
Difference
(selectable in menu)
DIFF = A - B
or
DIFF = B - A
Meas. Meas.
variable variable
Ratio
(selectable in menu)
RATIO =
0.00 ... 19.99 0.10
A
B
Passage PASS = • 100
0.00 ... 199.9 10 %
B
A
Rejection
REJECT=
(
1-
)
100 % -199.9 ... 199.9 10 %
B
A
Deviation
DEVIAT=
(
-1
)
100 % -199.9 ... 199.9 10 %
B
A
c (NaOH) [mmol/l]
Secondary display
only
Cation
exchanger
COND1 module
8285 El. COND
COND2 module
8285 El. COND
Calculation Block
pH
H
2
O
COND
measuring point 1
COND
measuring point 2
pH value calculation by means of dual conductivity
measurement
See instruction manual for 8285 El. COND module. Principle:
c(NaOH) =
COND1- 1/3 COND2
243
pH = 11+log[c(NaOH)]