Hanna-instruments PCA 310 Manual de usuario descargar pdf (Pagina 39)

To modify the Delta, edit the “Delta” line. The available values

are 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.5, 2, 3, 4, 5.

Note: The speed of the analyzer could be modified by changing the

sampling rate. A new decision regarding the chlorine regula-

tor is taken only after a new measurement.

The Setpoint and Delta could be quickly consulted on one

chlorine measuring panel.

LOW READING PROTECTION

To prevent excessive chlorine dosing if the detector is not work-

ing properly or the reagent bottle is empty, a “Detector Error”

is generated if the measured chlorine value is under the low

point value. This error is generated only if the low point fea-

ture is set active.

The chlorine dosing is stopped and the SYSTEM ERROR LED

starts blinking.

To enable this feature, edit “Chlorine Menu” - “Dosing con-

trol Cl” - “Low Point” value and set the “Low Point” status as

“Active”. The allowed value is 0.00 to 1.00 mg/L.

OVERDOSING PROTECTION

To prevent overdosing a “Detector Error” is generated if the

dosing command is on for the Max. ON time and the read

value is changing less than 0.05 mg/L.

The chlorine dosing is stopped and the SYSTEM ERROR LED

starts blinking. The dosing could be resumed only by restarting

the controller.

To modify this protection, edit “Chlorine Menu” - “Dosing

control Cl” - “Max. ON” value. The allowed range is be-

tween 30 and 720 minutes.

ALARMS

Two alarm setpoints are available for chlorine: Alarm high

and Alarm low.

The ALARM LED and alarm relay are activated when the chlo-

rine concentration is higher than Alarm high or lower than

Alarm low.

To modify the alarm setpoints, enter the “Chlorine Menu” -

“Alarms Chlorine” and edit “Alarm Hi” or “Alarm Lo” value.

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Hanna-instruments PCA 310 Manual de usuario Pagina 39