5
5. CE Compliance
Any model Optical Sensor Switch bearing a CE marking on it, is in
compliance with the below stated test standards currently accepted.
EMC Compliance with 89/336/EEC as amended;
Emission Standard: EN 55011:1991, Group 1, Class B
Immunity Standard: EN 55082-1:1992
6. OPERATING INSTRUCTIONS
The Optical Sensor Switch requires a +12VDC power supply with a
minimum current rating of 250 mA. During initial power up of the Optical
Sensor Switch with no flow conditions the red LED on the retro reflective
sensors will be “On”. This is an indication that power is on and the sensors
are ready for operation. When alarm conditions become “true”, the red LED
on the top of the retro reflective sensors goes to “Off”. The retro reflective
sensors can be positioned in any position along the flow meter tube, except
directly in front of each other.
WARNING: Do not install the sensors closer than 10 mm from one
another. Doing so may trigger a false alarm condition.
6.1 DIP switch configuration
In order to activate the alarm sensors the corresponding switch has to be
installed in the “On” position on the Configuration DIP switch (see Figure
6.1). Each sensor can be separately set for Momentary or Latch operation.
In addition the Relay and Buzzer can be configured individually. If for
example DIP switch SW1 is set to “On”, when the left retro reflective
sensor is active (Alarm Condition), the relay and green LED (on left side of
the D-connector) will be energized in the LATCH mode. They will stay in
the energized state without any conditions (even if the flow rate changes
and the retro reflective sensor have become inactive) until the RESET
button is pressed or external RESET TTL signal is applied. If momentary
mode is set (DIP switch SW3 is set to “On”) the relay and green LED will
be energized only when the left retro reflective sensor is active (Alarm
Condition). The same is true for Buzzer settings.
All Switches Off – Disable Alarm (LED, Relays and Buzzer).
