DALEMANS U-H1, Инструкция по эксплуатации

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Alarm thresholds
The elements in this sub menu can be used to view the gas concentration value associated with the
threshold of the different alarm levels.
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Relay failsafe mode configuration
The safety mode of a relay defines its status when it is at rest:
- Not in failsafe mode: the relay is not powered at rest.
- Failsafe mode: the relay is powered at rest.
The failsafe mode of an alarm relay is unset by default. The failsafe mode of each alarm relay is
independently configurable.
• Reset mode for level 1 alarms
The reset mode for an alarm specifies the way in which it is reset:
- Latching mode : when the cause of the alarm has disappeared, the alarm remains activated
until a manual action (“ RESET ”) is performed on the control unit.
- Non-latching mode: when the cause of the alarm has disappeared, the alarm is automatically
reset and disappears
Only the reset mode for the level 1 alarms can be configured. A level 2 alarm always needs to be
manually reset.
In manual reset mode, the
U•H1 control unit can display an alarm message when the gas concentration
has already returned to under the alarm threshold.
Heater
Gas alarm
13%LEL
This configuration element applies to all level-1 alarms.
•
“ Siren ” mode
The “ Siren ” mode designates a specific behaviour similar to that of the “Siren” output of the U•H1 control
unit or its audible indicator: while the alarm is still active (the gas concentration is still greater than the
alarm threshold), it is possible to reset the actions on the relays.
Note:
The “Technical Fault” relay is always in failsafe mode.
Activation of this configuration is to be performed by a technician approved by DALEMANS SA.
Note:
The “ latching ” mode of the relays is the default mode.