Vortex
54
To view the channel settings:
1. Select the required channel with the HOLD and STEP buttons.
2. Press the ZONE INHIBIT button for each of the channels you intend to test, in order
to avoid operation of the relays, unless you wish to check the relay output
configuration.
3. Press the Channel Test button on the back of the Display Module.
If the channel is a gas detector (or any other 4-20mA input device), the Channel
display shows the code GL (for Gas Level), and the Channel Test LED flashes. The
gas reading is displayed in the Reading display.
If the channel is a fire detector, the Channel display shows the code FL (for Fire
Level), and the Channel Test LED flashes. The loop current is displayed in the
Reading display in milliamps.
The readings are displayed without zero suppression.
4. Press the Channel Test button repeatedly to display the levels in the order shown in
Table 20. If the channel is not inhibited, the relays are tripped as the sequence passes
through them. This can be used to test that the relays and their devices are working
correctly.
Note that the individual alarms are operated independently, depending on their
thresholds and whether they are set as rising or falling, so more than one alarm may
be present at one time.
Table 20: Channel test display sequences
Gas detector channel
Channel
display
State Reading display
GL
Fire detector channel
FL Starting point. Alarm status according to input
signal level.
Fire Level
OC No alarms active. Fault active Open Circuit
AL Alarm levels 1,2 and 3 active. No fault active. Alarm Level
SC Alarm levels 1, 2 and 3 active and fault active. Short Circuit
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