Measured variable: TDS value
Symbol displayed in the controller's dis‐
play:
[TDS]
(total dissolved solids)
Unit of measurement: ppm (mg/l)
Physical variable: Total of all inorganic
and organic substances dissolved in a sol‐
vent
Display range: 0 …. 2000 ppm
Temperature range: 0 … 35 °C
[TLIMIT↑]
: ≤ 40 °C
Setting the TDS value displayed: You can
set a multiplicative factor
[TDS]
in the
[INPUT]
menu, with which the TDS value
displayed can be changed.
Displayed TDS value
[ppm]
= К (25 °C)
[uS/cm]
* TDS factor
Setting range of TDS factor: 0.400 …
1.000 (Default: 0.640)
Temperature compensation is always
linear with the TDS display with a refer‐
ence temperature of 25 °C .
Measured variable: Salinity (SAL)
Symbol displayed in the controller's dis‐
play:
[SAL]
units: ‰ (g/kg)
Physical variable: Mass of salts in a kg of
water given in PSU (
practical salinity
units).
The salinity is derived from the conduc‐
tivity 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)]
Introduction
9
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