S504_r2.0 – 09/2022 Page 10
PARAMETER 03 (conductivity) REFERENCE TEMPERATURE
See Parameter 02
PARAMETER 04 WORKING TEMPERATURE
All S504 models can measure the temperature and use the value for temperature compensation of
measurements. If no Pt100 sensor is connected, this parameter allows to enter the working temperature
value, which is displayed in brackets.
PARAMETER 05 K1 WORKING MODE
The K1 relay output features 3 different working modes, coded as follows:
0 = the relay is disabled (always OFF)
1 = the contact is closed when the set thresholds are exceeded
2 = the contact is open when the set thresholds are exceeded
PARAMETER 06 MIN THRESHOLD OF RELAY K1
Minimum threshold for the intervention of relay K1, accordingly with the above indications.
PARAMETER 07 MAX THRESHOLD OF RELAY K1
Maximum threshold for the intervention of relay K1, accordingly with the above indications.
PARAMETER 08 ENERGIZING DELAY OF RELAY K1
If the relay K1 is configured for working mode 1 or 2, this parameter allows to enter a delay (in seconds)
for its activation. Setting P08 to zero excludes the delay (immediate activation of the relay).
PARAMETER 09 DE-ENERGIZING DELAY OF RELAY K1
Same as parameter 09, but referred to the relay de-activation.
PARAMETER 10 K2 WORKING MODE
The K2 relay output features 6 different working modes, coded as follows:
0 = the relay is disabled (always OFF)
1 = the contact is closed when the set thresholds are exceeded
2 = the contact is open when the set thresholds are exceeded
3 = NC (normally closed) alarm, i.e. the contact K2 is closed when measurement is within the set
thresholds (P11 & P12).
4 = NO (normally open) alarm, i.e. the contact K2 is open when measurement is within the set
thresholds (P11 & P12).
5 = automatic cleaning cycle, i.e. at preset intervals, the instrument freezes the measurement,
activates the K2 relay (to which, for example, a solenoid valve is connected, that regulates the
dosage of detergent) for a set time; then deactivates K2 and keeps the measurement frozen for the
time necessary to complete the wash; finally it resumes to normal operation.
P10=5
K2
Measure
hold
Param.
P11 P12 P13 P11 P12 P13
Pause time Clean
time
Measure
hold Pause time Clean
time
Measure
hold
PARAMETER 11 MIN THRESHOLD OF RELAY K2
This is the minimum threshold for the activation of relay K2, or the pause time between two subsequent
cleanings as explained above.
PARAMETER 12 MAX THRESHOLD OF RELAY K2
This is the maximum threshold for the activation of relay K2, or the cleaning time as explained above.
PARAMETER 13 ENERGIZING DELAY OF RELAY K2
This parameter allows to enter a delay time (in seconds) for the activation of relay K2, or the
measurement hold time (in seconds) after a cleaning action.
