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The menu » Settings «
— The function for setting the self-hold function of the A1 alarm is opened.
● Select » Latching « or » Non latching « and press the » « key to activate.
● Select » Next « and press the » « key.
Note: » Latching « means that the relay must be manually acknowledged after the
alarm condition is no longer fulfilled, » Non latching « means that the relay is
automatically acknowledged after the alarm condition is no longer fulfilled.
— The function for setting the A1 acknowledgement is opened.
● Select » Can be acknowledged « or » Cannot be acknowledged « and press the
» « key to activate.
Note: » Can be acknowledged « means that the relay can be reset when the alarm
condition is fulfilled. » Cannot be acknowledged « means that the relay can only
be reset after the alarm condition is no longer fulfilled.
Overview of alarm settings
— The function for setting the A1 hysteresis is opened.
This function allows the user to set a bandwidth in which a tripped relay stays in
its status until the gas concentration is outside this bandwidth. With this function
relays will not "chatter" at the alarm set point. E.g. A1 set point is 40 ppm, hyster-
esis is set to 3 ppm. Alarm A1 will come on at 40 ppm and will stay active until the
concentration falls below 37 ppm.
● Select the line for input of the hysteresis and press the » « key to switch to
edit mode.
● Use the » « and » « keys to set each digit of the value and press the » «
key to confirm the setting.
● Select » Next « and press the » « key.
— The settings of the A1 are indicated.
● To confirm select » Confirm « and press the » « key.
— The settings for alarm A1 are now complete.
Attention:
If an alarm has been configured as » Can be acknowledged «, it can also
be reset when the alarm condition is fulfilled. In the case of safety-relevant
switching operations, the alarm must be configured as
» Cannot be can be acknowledged «.
Alarm condition fulfilled Alarm condition not fulfilled
Acknowledgement
button actuated
Acknowledgement
button not actuated
Acknowledgement
button actuated
Acknowledgement
button not actuated
Alarm configuration
Latching Can be
acknowledged
Relay de-energised Relay energised Relay de-energised Relay energised
Cannot be
acknowledged
Relay energised Relay energised Relay de-energised Relay energised
Non latching
Can be
acknowledged
Relay de-energised Relay energised
Relay is
automatically
de-energised after
the alarm condition
is no longer fulfilled
Cannot be
acknowledged
Relay energised Relay energised
Relay is
automatically
de-energised after
the alarm condition
is no longer fulfilled
Relay is
automatically
de-energised after
the alarm condition
is no longer fulfilled
OK
OK
OK
OK
M
OK
OK
OK