OZONE MONITOR BMT 932 Manual, Rev. 02/2021
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is shown on the first line of the display, alternating with the display of the actual channel. The
error contact Lamp Low opens, but the Error Relay stays in its normal state. A Lamp Low Warn-
ing should be a hint to the user, that due to aging the UV-lamp has become weaker and that at
the next opportunity it should be replaced by a new one. Measurement accuracy is not impaired
in this state.
Lamp Low Error
Additionally the Error relay indicates Error. The message
Error: Lamp Low
is displayed on the first line. 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. All three 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 contact 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.
Error: Lamp High
is shown on the first line of the display.
The Error Relay indicates an error. The instrument should be thoroughly checked by BMT
MESSTECHNIK (s. also Chapter Trouble).
Lamp High Warning
The Firmware version 1.16 for the OZONE MONITOR BMT 932 introduces the Lamp High
Warning as a new Warning in order to warn the user before the unit fails with Lamp High Error.
The warning is issued at an A/D converter threshold of 8,200,000, which is 50,000 below the
Lamp High Error threshold. This warning does not affect the output relays, so production is not
interrupted. The warning will be shown on the display, together with an acoustic signal. This
gives time to prepare for a planned replacement.
This warning usually will occur before a Lamp High Error. The message
Warning:Lamp High
is shown on the first line of the display, alternating with the display of the actual channel.
The new firmware is in production since mid May 2015.
