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Beschikbare talen
Beschikbare talen
pH (or between zero and 200 mV), while in the case of proportional controls,
the hysteresis must have a value between 0.20 and 1.00 pH (or between 20
and 100 mV).
● P7: At the device start-up, some electrodes require a stabilization (or
polarization) time during which the measurement is not reliable. This
parameter allows setting a delay at start-up (in minutes) during which the
pump is off and the display alternates between the measurement and the
"PAU" message. Typically, in the case of a pH electrode, a delay of 1 minute is
sufficient, while in the case of a redox electrode, it is recommended to set a
delay of at least 20 minutes. Sometimes this standby time is also useful to
compensate for hydraulic delays that can occur at the plant start-up. Once the
set time has elapsed, the pump begins to operate normally.
● P8: This parameter allows setting a time limit within which the measurement
must return to the working threshold value (P5), otherwise an alarm is
generated. A time between 0 (feature disabled) and 600 minutes (10 hours)
can be set. The alarm time count begins when the system detects a
measurement out of range and automatically resets when the measurement
returns within the threshold value. If the measurement remains outside this
threshold longer than the set time, an alarm is generated and the display
alternates between the measurement and the "ALL" message. When the alarm
is active, the dosage is disabled, and normal operation is resumed when the
alarm is reset by pressing the ON/OFF button, by turning the pump off and on
again, or automatically when the measurement returns to an acceptable value.
This condition may occur due to an insufficient dosage, such as not allowing
the achievement of the threshold value.
Electrochemical Calibration
pH Calibration
1. Rinse the pH electrode with distilled water and then immerse it in the pH 7.01
buffer solution.
2. Wait a few seconds for the system stabilization.
3. Press and hold the [-] key until the message "OFS" (OFFSET calibration) is
displayed.
4. Press ON/OFF to confirm the calibration or wait a few seconds to exit without
saving and keeping the previous calibration.
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