Maximum Value And Minimum Value Alarms (Instrument Versions Only); Overdose Alarm (Only Instrument Versions); Under-Lo Ad And Over-Lo Ad Alarms - ETATRON D.S. eOne PLUS Notice D'installation, Mode D'emploi, Notice D'entretien

Maximum value and minimum value alarms (Instrument versions only)

The control pumps, by the metering, control the maintenance of the values of the electrochemical
parameters of the water (pH, Redox, Cl, ppm) within the parameters set during the programming of the pump.
During normal operation of the system anomalies can bring the measured values outside the normal
values. On the eOne pump two alarm thresholds can be set, respectively "MAXIMUM VALUE" and "MINIMUM
VALUE". Once exceeded, the operator must intervene to analyse the cause that led to the activation of this
alarm and to restore the correct operating conditions.
Common causes that can generate this alarm situation may be:
Through the appropriate menu, you can define the maximum value beyond which the pump stops,
signalling the alarm and activating the signalling relay. The operator must intervene immediately, analyse and
remove the possible causes that generated the alarm.

Overdose alarm (only Instrument versions)

As described in the previous paragraph, faults can occur during operation, and although the pump is
working properly, the set values are not achieved. In this case there is a potential danger due to an overdose.
Common causes that can generate this alarm situation may be:
To prevent these critical situations, within the programming menu, a time threshold in hours / minutes
defined as "OVERDOSE ALARM" can be set, which once exceeded the pump stops, signalling the alarm and
switching the relevant relay. You will need an operator to analyse and remove the cause that generated the
alarm situation and to restore normal operating conditions.
Generally, the user knows the plant operating conditions and is able to evaluate the time necessary, of
the pump, to restore the correct operating values of the plant. It is recommended to add to the estimated
time some extra time to allow for a fair margin, always and however, to return to the correct operating
conditions of the plant itself.

UNDER-LO AD and OVER-LO AD alarms

The innovative HRS technology has enabled the development of a range of metering pumps that have
the ability to detect any changes in pressure inside the plant or malfunctions related to these variations. The
pump is able to provide useful information about the state of operation. Specifically, this is expressed in the
availability of two different types of signals.
a) UNDERLOAD: If during normal operation the pump has no fluid to be metered which may be caused
by problems on the suction line: clogged filter or damaged valves, the pump goes into UNDERLOAD status.
This condition is indicated by the signal on the display, the ALARM LED lights up and activates the
corresponding relay (if enabled). The pump stops after approximately 20 injections.
b) OVERLOAD: The pump during normal operation performs a check (in real time) on the pressure
conditions in the plant. If this pressure exceeds the maximum allowed (plate setting), the instrumentation of
the pump reacts reporting this state with a message on the display, the ALARM LED lights up and the relay
activates. Even in this case, the stopping of the pump occurs after 20 injections from the occurrence of the
event. Under particular conditions of pressure could occur the OVER-LOAD alarm even with air presence in the pump
body. We recommend that you take action to check the pump.
The UNDER-LOAD and OVER-LOAD functions can be enabled and disabled using the respective setup
menu. The factory settings for the UNDER LOAD and OVER LOAD functions are disabled.
ENGLISH
70
Lack of additive within the suction tank;
•
Obstruction of the pump;
•
Losses in the treatment system;
•
Incorrect concentration of additive dosed;
•
Sensor breakage;
•
Lack of additive within the suction tank;
•
Obstruction of the pump;
•
Losses in the treatment system;
•
Incorrect concentration of additive dosed;
•
Sensor breakage;
•