Hanna Instruments HI 8050 User Manual

Page 14

ALARMS

ALARMS
Fertigation controller has the capability to supervise and generate an alarm
for the following conditions:
- Conductivity sensor out of range. Reference, minimal and maximal offset

and time-out for conductivity alarm are set using panel S38

S38

S38 (EC CON-

TROL). The current values of conductivity sensors are displayed on panel
C06

C06

C06 (EC STATE).....

− pH sensor out of range. Reference, minimum and maximum offset and

time-out for pH alarm are set using panel S36

S36

S36 (PH CONTROL). The

current values of pH sensors are displayed on panel C05

C05

C05 (pH STATE)

− Problems with the water supply.

− Dirty filters.

− Low levels in fertilizer and acid tanks.

− Waste of fertilizers.

− Main irrigation counter fail.

− Overdose and underdose of fertilizer.

The system will take appropriate action and record the alarm. These ac-
tions can be:

•

Given a pH alarm condition, the irrigation process can be set to
stop or continue using panel S54

S54

S54 (ALARM BEHAVIOR).

•

Given an EC alarm condition, the irrigation process can be set to
stop or continue using panel S54

S54

S54 (ALARM BEHAVIOR).

•

Given a dirty filter alarm condition, start the filter cleaning program
in accordance with the priority and working time settings

•

Given a water supply alarm situation the controller goes in BLOCK state.

•

All alarm situations are displayed on panel C23

C23

C23 (ALARM).

All anomalies (old alarm conditions) are displayed in panel C25

C25

(ANOMALY).

LOGGING (DIARY) FUNCTIONS

LOGGING (DIARY) FUNCTIONS
− The Fertigation controller has the capability to log the most important

occurred events and values of different parameters that can offer a de-
scription of the evolution of the entire process;

− The most important values are:

- Number and time period of every program activation;
- Filter cleanings;
- Averages of pH, conductivity and temperature;
- Accumulations;

This manual is related to the following products:

HI 8060