OZONE ANALYZER BMT 965 Manual, Rev. 01/2024
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Off-Gas Cabinet BMT 965 OG
As the recommended configuration the cabinet contains the UV photometric ozone analyser, a
long-life ozone resistant sample gas pump SGP5, the power supply for the external Peltier-electric
cooler/dryer DH6, a purge unit (solenoid valve/air pump assembly with particle filter) for fully
automatic purging and zeroing the photometer, a sample gas flow meter, thermal mass flow detec-
tion and warning (LOW FLOW), and a warning system for the internal temperature of the external
cooler (DRYER ERROR).
Sample Gas Pump SGP5
The sample gas pump SGP5 is a membrane pump driven by a brushless DC motor. Life expectancy
of pump and motor is many years.
The SGP5 may be operated at a maximal system pressure of ± 100 mbar g. In other words: The
internal pressure may not differ from the ambient pressure by more than 100 mbar. Against zero
pressure head (differential pressure) the pump moves about 0.5 l/min. At a pressure head of
100 mbar it still can pump 0.35 l/min. But this pump is not a compressor! It is a gas mover.
Warning: Do not apply more than 1 bar g gas pressure to the instrument!
Avertissement: Ne pas appliquer une surpression de gaz supérieure à 1 bar sur l’instrument!
Sample Gas Cooler/Dryer DH6
The Peltier-electric dryer DH6 is a flow-through cooling device for removing water vapor from
the sample gas, about 64 x 247 x 140 mm (W x H x D) in size. The temperature of the inner sur-
face of the tube is automatically controlled to a temperature which may be set between 1 °C and
15 °C using a screw driver. For details refer to the manual of the DH6.
Caution: Before opening the lid of the DH6 electronics, the user should ground himself by touch-
ing grounded points in order to prevent damage of the electronics by electrostatic discharge.
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