Pulse Instruments
System 4 Manual
Version 1.6
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13
4.3.3 Consent
The consent function is used to
prevent acid and oxidation pumps
from running at the same time,
which may result in the
production of harmful gases.
Consent also allows for optimized
use of chlorine and creates better
chemical balance in the water. If
the consent jumper is in place,
the acid pump takes priority over
the oxidation pump, whenever
the acid pump is on, the oxidation
pump will never be on, even if the
value of the ORP is under the set
point.
Acid and oxidation pump will run independently if the consent is off.
4.3.4 Flow / Pressure Switch
If a flow / pressure switch is connected and if there is flow / pressure in the recirculation loop, the
chemical injection will start treating the water as needed. If no flow / pressure is detected (Water
Fault), the control system will continue monitoring and recording, but will not allow for any
chemical injection or any alarms to occur. In the “Water Fault” condition, the alarm function is
disabled, and an indicator light on the operator interface flashes on / off. The flow switch /
pressure switch function allows for a 5 second confirmation (on / off) in order to ignore false
signaling or momentary contact.
4.3.5 Manual
Control
Turn the power switch located on the side of the control panel to the “MAN” position (see Fig. 3).
The system will bypass the PLC (programmable logic control) module. The pH and ORP meters
(see Fig. 1) will be on to monitor the pH and ORP values and the acid and oxidation pumps will
be on continuously. Use the manual control function if the PLC failed.
4.4 Safety
Alarm
An alarm condition occurs due to process failure when levels of the chemicals exceed the
specified alarm limits of alarm set points. Chemical pump is shut-off and an audio-visual alarm is
activated until reset by an operator.
4.4.1 Alarm
Contact
If pH reaches the alarm set point, either High or Low, the pH Alarm light located on the operator
interface panel (See Fig. 2) will immediately turn on, but the chemical pumps will continue to feed
as needed. If the alarm contact is maintained for at least 2-minutes, the alarm light will start
flashing, the main alarm (beacon and horn) will turn on, and the chemical pumps for both acid
and oxidizer will turn off. If the alarm condition restores itself so that the alarm contact is no
longer active, then the main alarm will reset itself and normal chemical dosing will be restored.
If ORP reaches the Low or High alarm set point, the ORP Alarm light located on the operator
interface panel (See Fig. 2) will immediately turn on, but the chemical pumps will continue to feed
as needed. If the alarm contact is maintained for at least 2-minutes, the alarm light will start
flashing, main alarm (beacon and horn) will turn on, and the chemical pumps for both acid and
oxidizer will turn off. If the alarm condition restores itself so that the alarm contact is no longer
active, then the main alarm will reset itself and normal chemical dosing will be restored.
