OZONE MONITOR BMT 932 Manual, Rev. 02/2021
26
Channel 2 3 6
showing on which channel the alarms have occured. In this example Channels 2, 3
and 6 have a High Alarm.
If Alarm Beep is activated, there is also an acoustic signal, which may be stopped
using the BACK key, if the front panel menu is on its basic level, showing con-
centrations. The BACK button does not clear a latched alarm, though.
If ozone concentration falls below Threshold –0.002 x range (hysteresis) the
alarm state is ended if Latching is set to Not-Latching. The High-Alarm-Relay
falls back into its normal state, the error message and the acoustic signal disap-
pear. The end of the alarm state is entered into the Event-Log.
In case Latching is activated, the alarm will not go away until it is acknowledged
by pressing the ENTER button, even if concentration falls below the mentioned
threshold. The end of alarm will be entered into the Event-Log when the button
is pushed.
A high alarm threshold can never be set below the low alarm threshold on a cer-
tain channel.
Low-Alarms
Low Alarms can be configured for each channel individually or for all channels at
once. Only active channels (see p. 28) can be configured.
These alarms occur if Enable/Disable on a certain channel is activated and
concentration is above the limit stored under Threshold. The Low-Alarm-Relay
switches to the alarm position. At the same time a Low-Alarm-Event is entered
into the Event-Log. The display alternates between the measurement result and
the message
Low Conc. Alarm on
Channel 1 4
showing on which channel the alarms have occured. In this example Channels 1
and 4 have a Low Alarm.
If Alarm Beep is activated, there is also an acoustic signal, which may be stopped
using the BACK key, if the front panel menu is on its basic level. The BACK but-
ton does not clear a latched alarm, though.
If ozone concentration decreases below Threshold -0.002 x range (hysteresis)
the alarm state is ended if Latching is set to Not-Latching. The Low-Alarm-
Relay falls back into its normal state, the error message and the acoustic signal
disappear. The end of the alarm state is entered into the Event-Log.
In case Latching is activated, the alarm will not go away until it is acknowledged
by pressing the ENTER button, even if concentration decreases below the men-
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