OZONE ANALYZER BMT 964 Manual, Rev. 04/2021
20
Date
During entry the date will be constantly tested on conformance to the calender
rules, so it is not possible e.g. to enter the date 29.02.01. In order to make this test
possible, first the year, then the month and then the day has to be set.
Other Parameters
Autozero Interval
This variable determines, if and in which time interval (hours) the instrument will
perform an (fully) automatic zeroing cycle. If set to zero, there will be no automat-
ic zeroing.
Caution: In case the instrument is configured for automatic zeroing care must be
taken to supply the purge gas (oxygen or filtered air). The instrument may either
be equipped with an external or Internal Purge Unit (solenoid valve and air pump
with particle filter, available as an option), or some other means of switching the
purge gas supply via the PURGE relay contact has to be provided (see also page
23).
The time interval between two automatic zeroing cycles can be set between 1 and
99 hours. If the instrument is set to automatic zeroing one additional zero cycle is
performed 15 min after switching on. A zero triggered manually, via RS-232 or
the binary input will reset the interval timer.
Alarm Beep
If this item is set to Enabled, the BMT 964 emits an acoustic signal during Low-
or High-Alarms. This beeper may be stopped using the BACK button, if the front
panel menu is on ist basic level.
Reset Parameters
This will set all Parameters described above back to factory settings. When press-
ing ENTER, the instrument displays
Are you sure?
If ENTER is pressed again, parameters are set as described in the following table:
Parameter Setting
Ozone Unit g/Nm
3
Pressure Unit bar
High Alarm Limit 80 % of Range
High Alarm enabled No
High Alarm latched No
Low Alarm Limit 40 % of Range
Low alarm enabled No
Low Alarm latched No
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