Figure 10: Display of the measurement (on the left) or parameter settings display (on the
right)
Refer to paragraph Menus on page xx for more details about the information
that are available on the screen.
Contextual Keys (B)
The function of each of the 5 keys indicated in the lower part of the display
changes depending on the page displayed.
Zone Status Indicators (C)
The two bars of 7 indicators represent two zones. The detectors that are
connected to the controller can be assigned to one of the two zones by using
COM 32 configuration software.
Each bar displays the status of the group of detectors of the pertinent zone as
follows:
Orange indicator of high-range excess (OVS: overscale, high-range excess). This
value is adjustable up to 110% of the range.
- Off: The measurement is lower than the OVS value programmed.
- Lit: The measurement is higher than the OVS value programmed. The alarm
relays are activated in accordance with the program. In parallel, the display
indicates « > ».
OVS acknowledgement must be done manually and is only possible if the current
value drops below the programmed value.
Management of “Non-Ambiguity Reading”
The Non-Ambiguity Reading function only applies to the monitoring of flammable
gases in a range of 0-100%LEL, and is subject to the decision of the operator.
Upon the detection of a concentration of gas higher than 100% LEL, the LCD
indicates > 100% LEL – Frozen value – High Concentration - System in Fault
Condition. The OVS and FAILURE indicators are activated. Such an alarm can
only be deactivated by turning off the detector via the maintenance menu once the
current gas level is below the programmed OVS limit.
Alarm status red indicators:
- Off: No alarm
- Solid: at least one gas detector of the corresponding zone is in alarm condition.
Acknowledgment is programmed in automatic mode or the alarm reset button
located on the front panel has already been pushed.
- Blinking: at least one gas detector of the corresponding zone is in alarm
condition. Acknowledgment is programmed in manual mode and has not been
required yet.
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