Burkert Type 8619 - Manual (Page 84)

82
Adjustmentandcommissioning
TEMP. ADJUST: The temperature measured can be corrected by an offset value. Enter the offset value in °C.
TEMP.COMP.: Choose the type of temperature compensation to determine the fluid conductivity:
• according to a linear percentage (choose "linear"). The linear temperature compensation may be sufficiently
precise for your process whenever the temperature of your process is always > 0°C. Enter a compensation of
between 0.00 and 9.99%/°C in the next "Coef." field.
Use the following graph and equation to calculate the average value of the compensation coefficient a
according to a temperature range ∆T and the associated conductivity range ∆c:
χ
χ
25
25 T [°C]
∆χ
∆T
T
χ
T
α =
χ
25
∆χ
∆T
x
1
• or according to the natural water law (choose "EN27888").
• ou according to the ultra pure water law (choose "UPW").
• or according to the ultra pure water and sodium chloride laws (choose "UPW-NaCl").
• or according to the law of the concentration table (choose "Concentration table", available as an option) that
has been chosen in the "Concentration" function hereafter.
• or deactivate temperature compensation (choose "None").
CONCENTRATION: Available as an option (see chap. 8.10.4). Choose the mass concentration table for your
fluid in the list. This data (%) is then available in the list of process variables for the conductivity module. The fluid
concentration is determined using the measured and non-compensated values of the conductivity and the tem-
perature, whatever the choice made in "Temp.Comp.".
USP ALARM: Enter a conductivity value percentage from the table "USP <645>".
T [°C]
χ
A
C
B
USP<645> graph
percentage of the USP<645> graph, set in
the "USP Alarm" field
Graph
zone Description Name displayed in
the user defined
"Ux" view (see
chap. 8.10.8) Associated
code in the
datalogger (see
chap. 8.10.18) State of
the "on/off"
output (see
chap. 8.10.22)
C The conductivity of the fluid has exceeded
the value in the table USP<645> at the
corresponding temperature. "> Max." 1 ON (output not
inverted)
Type 8619
english