2.4 Actuator Types
The ChlorGuard system provides a choice of using a 24V electric powered geared motor actuator or
alternatively using a pneumatically powered geared ratchet actuator.
Electric Actuator & Bracket Assembly Pneumatic Actuator & Bracket Assembly
2.5 Chlorine Transmitter & Sensor
The standard chlorine sensor for the ChlorGuard 7 system is the Drager Polytron 7000
Transmitter/Sensor system. The transmitter/sensor has a Safety Integrity Level 2 (SIL2) rating, which
assures reliable performance. The transmitter produces a 4-20 mA signal which is proportional to the
gas concentration and in combination with the controller system (PLC) can be used to activate safety
relevant functions in compliance with the requirements of the IEC 61508 / IEC 61511-1.
The Transmitter meets the following requirements:
Functional Safety acc. To IEC 61508 / IEC 61511-1
Explosion protection acc to EN 50014 and EN 50020
Electromagnetic Compatibility (EMC) acc. To EN 50270
The Sensor consists of a gel which creates a signal when it comes into contact with chlorine gas. The
sensor can be easily removed by just unplugging the sensor from the Transmitter.
The Polytron 7000 Transmitter/sensor should be Proof tested annually for accurate results and
corrects any small drift in span of the sensor.
The Transmitter transmits the signal from the chlorine Sensor and converts this to a reading of what
he chlorine level being detected to the ChlorGuard Control Panel PLC. The Transmitter also provides
a digital reading of the chlorine level.
The chlorine sensor Warning is set at 3ppm and alarm is set at 5ppm.
Warning of 3 ppm alerts personnel of presence of chlorine.
Alarm of 5pp will alert and activate the ChlorGuard system to shut the actuators on the
chlorine containers.
To Next Page
Loading...