Knick Stratos Multi E401N - Delta Function

Stratos Multi E401N
70
Table
When using process media with a known pH value temperature response, the pH output value can be
corrected using a table. The percentage deviation from the measured value in % can be entered for
temperatures between 0 and 95°C in steps of 5°C. The pH output value is then corrected by the
corresponding percentage deviation from the measured value in %, depending on the measuring
temperature. Table values are linearly interpolated. If the temperature falls below or exceeds the
specified value (<0°C or >95°C), the last value in the table is used for calculation.
The table must be completed with the following values in steps of 5°C:
((pH
25
/ pH
T
) – 1) • 100 [%]
pH
25
pH value at 25°C
pH
T
pH value at measuring temperature T
Settings can be changed in the TC Process Medium submenu:
Parameter Setting

[I] [II] … pH

TC Process Medium
Note: If the delta function and TC correction are enabled at the same time, the TC correction is carried
out first and the delta value is then deducted.
5.7.4 Delta Function
Note: If the delta function is enabled, “∆” is shown on the display in measuring mode.
If a delta value is specified, the measuring system calculates the difference
output value = measured value – delta value
The delta value can be set using the “+” or “-” signs. If using a negative sign, the delta value is added to
the measured value.
The delta value is adjusted in the Delta Function submenu:
Parameter Setting

[I] [II] [Sensor]

Delta Function
All outputs are controlled by the output value; the displays show the output value.
Note: If the delta function and TC correction are enabled at the same time, the TC correction is carried
out first and the delta value is then deducted.