EF315_r5.1(v12.22) – 03/2023 page 16
If pump 2 should be disabled only when level 2 and flow are missing, enter the value 2 + 4 = 6. For adding
the monitoring of level 1 (lack of acidification affects the chlorine measurement), add weight 1. If dosage
should be disabled even upon maintenance request, also include weight 8.
Warning! This parameter should be set by skilled personnel only!
PARAMETER 15 START-UP DELAY
This parameter allows to set a start-up delay, i.e. a waiting time before starting operation, in order to
allow the proper polarization and stabilization of measurement sensors. This will prevent unreliable
initial readings. Typically, in case of pH measurements, one minute is enough, while a redox electrode
or amperometric cell may need a delay of 30 minutes. This waiting time also allows to compensate for
any hydraulic delays that may occur at plant start-up.
Set a time (in minutes : seconds) during which, after powering the electronic unit, the system remains
in stand-by, the display shows the delay countdown and outputs are disabled. Once this time has
elapsed, the system starts normal operations.
PARAMETER 16 DELAY AFTER RESTORING FLOW/CONSENT
Similarly to the parameter P15, you may need to enter a stabilization period after restoring the flow to the
sensors. Normally this time is shorter than that set in P15. During the lack of water flow (no Flow consent)
outputs are disabled (see P07 and P14), and remain deactivated even after the flow/consent is restored
for the time set in this parameter. P16=0 means entering a minimum delay of 2 seconds.
PARAMETER 17 CHLORINATION DELAY AT START-UP FOR pH STABILIZATION
A pH electrode needs a polarization time significantly shorter than the sensors used for chlorine
determination. Moreover, the pH value affects the response of almost all the chlorine sensors.
This parameter allows to enter a delay (in minutes : seconds) before starting the chlorine control, during
which the system checks if the pH level reaches the desired threshold. If the threshold is reached before
this time has elapsed, the timer is zeroed, otherwise the system will wait for all the delay. During this
time, the output P2 (related to redox or chlorine measurements) is disabled, waiting for pH stabilization.
This function can substitute (or been added to) the start-up delay (P15). Setting P17 to zero means not
use this function.
PARAMETER 18 CHLORINE CALIBRATION DELAY
As explained in parameter P15, a waiting time is required at start-up to allow the sensors to polarize
completely, so that they can give a correct and reliable signal. Similarly, it is necessary to wait for a stable
signal before performing an electrochemical calibration.
This parameter allows to enter a time control, to avoid that an unskilled operator performs a calibration
of the chlorine sensor (redox electrode or amperometric cell) before its complete stabilization.
In the case of RX electrode, the minimum time is 15...20 minutes, while for an amperometric cell the
minimum time varies between two and four hours.
PARAMETER 19 ALARM RELAY CONFIGURATION (NO / NC)
This parameter allows to configure the operating mode of the alarm relay. In particular:
- P19=0 relay normally energized (contact open); it energize (contact closes) upon alarm
- P19=1 relay normally energized (contact closed); it deactivates (contact opens) upon alarm
(configuration “fail-safe”).
PARAMETER 20 FLOW INPUT CONFIGURATION (NO / NC)
This parameter allows to configure the operating mode of the FLOW input, depending on the flow control
or consent used.
In particular:
- P20=0 EF315 unit enabled with input open (NO)
- P20=1 EF315 unit enabled with input closed (NC)
Note: If a NPN micro-magnetic flow sensor is use, set P20=1.
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