OZONE ANALYZER BMT 964 Manual, Rev. 04/2021
26
Lamp Low Error
Additionally the Error relay indicates Error. The message
Error: Lamp Low
is displayed between measurement results. Accuracy can be impaired in this state.
Lamp Off Error
The UV-lamp does not work any more. The message
Error: Lamp Off
is shown constantly. Both analog outputs are set to their max. values (10 V respectively 20 mA),
because the instrument is not able to aquire concentration data without a lamp. Lamp Low con-
tact and Error Relay indicate error.
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).
Caution: 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 MESSTECHNIK GMBH.
Cuvette Dirty Warning
In each zeroing the dirtyness of the cuvette is measured and displayed.
Warn: Cuv. Dirty
is displayed between measurement results, as soon as dirtyness rises above 50%. The contact
Cuvette 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
Warning will reappear after switching on again. This warning can only be cleared by zeroing with
a cleaned cuvette.
Cuvette Dirty Error
If the dirtyness 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.
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