Idiomas disponibles
Idiomas disponibles
4 = ON/OFF chlorine
activates when the measurement is lower than the "working threshold – ½ hysteresis"
value, and deactivates when the measurement exceeds the "working threshold + ½
hysteresis" level
P5:
This parameter allows to set the working threshold used when the device operates in
automatic control.
P6:
This parameter represents the intervention hysteresis around the working threshold; it can
be set between zero (not recommended!) and 200 mV.
P7:
At the device start-up, some electrodes may require a stabilization (or polarization) time,
during which the measurement is not reliable. This parameter allows to set a delay at start-
up (in minutes), during which the output is disabled and the display alternates between the
measurement and the "PAU" message.
A redox electrode normally requires a delay of at least 20 minutes.
Sometime 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 unit begins to operate
normally.
P8:
This parameter allows to set a time limit within which the measure must return to the
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 measure 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 output is disabled and normal operation is resumed when the
alarm is reset by pressing the ON/OFF button, by turning the unit off and on again, or
automatically when measurement returns to an acceptable value. This condition may occur
due to wrong setting, which does not allow to reach the threshold value.
CALIBRATION
1. Rinse the redox electrode with distilled water, then immerse it in the calibration solution (220 mV)
2. Wait a few seconds for the system stabilization
3. Press and hold the [-] key until the message "OFS" (OFFSET calibration) is displayed
4. The calibration solution value is automatically recognized and displayed
5. Press ON/OFF to confirm the calibration or wait for a few seconds for exiting without saving and
keeping the previous calibration
Notes
The redox calibration is a single point procedure (offset). However, pressing the [+] key the system
-
enters the GAIN calibration, but this will not have any effect.
During normal operation you can see the offset value (by pressing [-]),to check the status of the
-
electrode. The ideal value is an offset close to zero. When this value is too close to the max / min
limits (-100mV ... +100mV), it means that the electrode is contaminated or dead.
EF117_r1.0 – 05/2018
this option is typically used for chlorination or alkalization; the pump
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