OZONE MONITOR BMT 932 Manual, Rev. 02/2021
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change into normal operating mode is displayed and counted down, giving an indication on when
warmup will end. The time period between switching on and normal operating mode can last
between 40 s and 420 s. During this time the front panel keys are deactivated. Serial communica-
tion is possible. Warmup will end with the display:
Waiting for
first result
At the end of the warmup period, the Error Relay, the Lamp Low Relay, and the Low and High
concentration alarm relays will switch to their normal position (non-error).
The EMO-Relays will only close if the corresponding sample concentrations were found to be
below the assigned alarm thresholds (see pages 31 and 25). This means, that it can take an addi-
tional two minutes when using a six channel instrument before equipment (ozone generators)
connected to the EMO-outputs are allowed to start operation.
13 Front Panel Operation
The front panel consists of a two line x 20-character alphanumeric display (LCD with white
backlight illumination) and three pushbuttons. The concentration display will be updated when-
ever a new concentration measurement result is available, i.e. every 20 s. All other messages (er-
rors, warnings, concentration alarms) will be displayed immediately.
OSTI, MONTEREY
BACK SCROLL/SET ENTER
In normal operation the display shows the mode of operation and channel information in the
first line, while ozone concentration is displayed in the second line.
The pushbuttons can be used to perform the following operations:
Switch between automatic sampling mode and manual sampling of a single channel
View parameters
Change the parameters
The following diagram shows the functions of the main menu:
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