ProMinent DULCOMETER diaLog DACb Assembly And Operating Instructions Manual page 72

Setting measured variables
Measured variable: TDS value
Measured variable: Salinity (SAL)
72
Changing the reference temperature
The temperature coefficient must be recalibrated if
the reference temperature is changed.
Adjustable process for temperature compensation
[off]
–
Temperature compensation is switched off.
–
It is measured based on the set reference
temperature.
[lin]
–
Linear temperature compensation via the
–
temperature range permitted for the sen‐
sors. The reference temperature can be set
between 15 °C ... 30 °C.
– [nLF]
Non-linear temperature compensation
–
according to DIN EN 27888 for natural
water, between 0 °C ... 35 °C. The refer‐
ence temperature can be switched,
20 °C / 25 °C.
Symbol displayed in the controller's display:
solids)
Unit of measurement: ppm (mg/l)
Physical variable: Total of all inorganic and organic substances dis‐
solved in a solvent
Display range: 0 .... 9999 ppm
Temperature range: 0 ... 35 °C
[TLIMIT↑] : ≤ 40 °C
Setting the TDS value displayed: You can set a multiplicative factor
[TDS] in the menu, with which the TDS value displayed can be
changed:
[ppm] = К (25 °C) [uS/cm] * TDS factor
Displayed TDS value
Setting range of TDS factor: 0.400 ... 1.000 (Default: 0.640)
Temperature compensation is always linear on the TDS display
with a reference temperature of 25 °C.
Symbol displayed in the controller's display:
Physical variable: Mass of salts in one kg of water given in PSU
(practical salinity units).
The salinity is derived from the conductivity measured, with a
specified non-linear temperature compensation and a reference
conductivity (KCL).
Display range: 0 .... 70.0 ‰
Temperature range: 0 ... 35 °C
[TLIMIT↑] : ≤ 35 °C
The salinity [SAL] is calculated based on the
[Practical Salinity Scale 1978 (PSS-78)]
[TDS] (total dissolved
[SAL] units: ‰ (g/kg)