Vortex
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6 OPERATION
6.1 General
This section describes the use of the Vortex system for monitoring, and the display of faults
and alarms.
The system status can be monitored through the Display Module or through an external
system using the digital communications ports, for example, a Distributed Control System
(DCS). The information here is mostly concerned with the Vortex Display Module.
The operation of the sounder and relays depends on the configuration of the relay logic
(section 4.5.3). The details of systems configured by Crowcon are given in the Specification
Sheet. For full details of the displays and controls on the Display Module, see section 4.6.
6.2 Monitoring with the Display Module
In normal operation all the LEDs in the channel status display are OFF. The system cycles
through the channels, displaying each channel reading in turn for three seconds. The channel
number is displayed in green, and the reading for the channel is displayed in red. The units of
concentration are displayed by the illuminated green LED on the right of the Reading display.
For a gas detector, the concentration is displayed as %LEL (percentage of Lower Explosive
Limit), %VOL (percentage by volume) or PPM (parts per million). These units can be
configured in VortexPC.
NOTE: Detection occurs on all channels at all times. The display provides a view of the
reading on a particular channel. The channel is not affected by this operation.
For a fire detector, a row of dashes appears on the Reading display when that channel is
displayed and there is no alert condition. The word FIRE is illuminated on the green LED at
the right of the Reading display.
To stop the cycling through the channels, and hold the reading of a particular channel, press
the HOLD button when the channel is displayed. While the channel is held, the green LED
next to the HOLD button is lit.
While the Display Reading is held, you can step to another channel by pressing the STEP
button until the desired channel is displayed.
To return to the cycling display, press the RUN button. The Hold LED goes out.
ATION
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