OZONE ANALYZER BMT 965 Manual, Rev. 01/2024
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33
Lamp High Error
In case the lamp becomes too bright for some reason this error is activated. Concentration data
are inaccurate. The Error Relay indicates an error. The instrument should be thoroughly checked
by BMT MESSTECHNIK (s. also Chapter Troubleshooting).
Warning: The UV radiation power output of the UV lamp is less than 1 Watt. Avoid dismantling
of the instrument with mains power applied. The lamp contains significantly less than 5 milligrams
of mercury. Mercury is a poison. Dispose lamp at a waste disposal place which is qualified to handle
mercury containing lamps. If you cannot find a respective place, return the lamp to BMT.
Cuvette Dirty Warning
In each zeroing the dirtiness of the cuvette is measured and displayed.
Warn: Cuv. Dirty
is displayed between measurement results, as soon as dirtiness rises above 50%. The contact Cu-
vette Dirty opens but the Error Relay stays in the normal position. Depending on the kind of
soiling accuracy can be impaired already. This warning shall remind the user to have the cuvette
cleaned at the next opportunity. In case the instrument is switched off in this state, the Dirty Warn-
ing will reappear after switching on again. This warning can only be cleared by zeroing with a
cleaned cuvette.
Cuvette Dirty Error
If the dirtiness of the cuvette rises above 60 %
Error:Cuv. Dirty
is displayed. Additionally, to the contact Cuvette Dirty the Error Relay goes into its error state.
Measurement results are inaccurate.
Overpressure
Cuvette pressure is above the allowed maximum pressure (the maximum pressure is defined by the
pressure range which is displayed on the front panel during warm-up). The instrument displays
Err: Overpress
Due to the fact that reliable pressure data are not available, the displayed ozone concentration is
wrong. The Error Relay is in its error state.
Overrange
Ozone concentration is above the range of the instrument. An alternating display of
Err: Overrange
and ozone concentration range is shown. The Error Relay is in its error state. The analog outputs
are on their maximum values.
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