IMPORTANT
If the on time is too short, it is possible that the Bluelab Pro Controller won’t be
able to dose enough to keep up with the changing nutrient/pH levels, even if it
doses every dosing cycle.
If the on time is too long, the value is likely to overshoot; i.e. a single dose
changes the value so much it goes over the desired value.
Hint: The mixing time of the reservoir can be estimated by manually adding
sufficient nutrient to significantly shift the conductivity value, while timing how
long it takes from adding the nutrient, to when the conductivity value becomes
stable.
Dosing lockouts
Some conditions will cause the Bluelab Pro Controller to stop controlling. These are
called dosing lockouts. This is how the five types of dosing lockouts work:
Measurement range limits
Each of the measurement types (conductivity, temperature and pH) have a
measurement range within which they can measure. Conductivity, for example, can be
measured between 0.0 EC and 5.0 EC; temperature between 0°C and 50°C; pH
between 0.0pH and 14.0pH.
If values outside these limits are sensed, the Bluelab Pro Controller will indicate that it
is under or over range by flashing the display and displaying “ur” or “or” in the affected
measurement type. Dosing will immediately stop in that measurement type. pH or EC
“ur/or” will also stop EC or pH dosing.
Alarms
When alarms are turned on, and the Bluelab Pro Controller senses that either EC or pH is
beyond the set high or low alarm values, all nutrient dosing will stop (both EC and pH).
IMPORTANT
Alarms are not just warnings that values have shifted away from the required
value - they stop dosing. Be careful not to set alarm values which are too close to
the required values, as they may result in the Bluelab Pro Controller going into
alarm because of small variations in measured values.
When the values return to within the limits of the set alarms, the alarm state ceases,
and after a 60 second countdown, the Bluelab Pro Controller begins controlling again,
dosing as required. The alarm state can also be cancelled by switching alarms off
(pressing the alarm button or switching alarms off via Edenic). After a 60 second
countdown the Bluelab Pro Controller will begin controlling again.
Ineffective Control Lockout
The Bluelab Pro Controller continually checks to ensure that dosing is having an effect.
It will go into lockout if 15 dosing cycles of any of the three measurement types
(conductivity, temperature, or pH) do not move the measured value by at least 0.1 EC,
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