Hanna Instruments BL100 - Events Management; Alarms

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EVENTS MANAGEMENT
9. EVENTS MANAGEMENT
9.1. ALARMS
Alarms can be independently enabled or disabled in SETUP.
Any event that activates the alarm turns automatic control Off, the alarm relay is deactivated and the
LCD backlight is blinking red.
The table below illustrates the conditions that will activate the alarm and deactivate the control pump.
Alarm Description Alarm condition Solution
Overtime
alarm
Pump remains on
continuously for the
time set in menu
Overtime Alarm setting
Control can be switched off.
Pump is activated in
Manual mode.
Hold level
alarm
Low-level sensor
active
Refill chemical reagent
container.
Low alarm
Measured pH / ORP
is lower than the
Low Alarm threshold
value, for more than
5 seconds
Increase pH / chlorine
content of process to
acceptable values.
High alarm
Measured pH / ORP
is higher than set
threshold alarm High
pH, for more than
5 seconds
Decrease process pH
/ chlorine content to
acceptable values.