LumaSense Technologies INNOVA 1412i - Manual (Page 127)

Chapter 11
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BE6025-15 1412i Photoacoustic Gas Monitor LumaSense Technologies A/S
Page 127 of 202
The only regular maintenance required for the 1412i is:
Calibration – approximately every 3 months (see Chapter 12 ).
Changing the fine air-filter paper in the internal and external air-
filtration units (see section 11.1 ).
Cleaning of the filter in the ventilation unit (see section 11.2 ).
11.1 Changing the Fine Air-filters
The monitor is equipped with an internal filtration unit.
The internal unit is mounted on the air-inlet, on the back panel. This
is shown in Fig.11.1.
Fig.11.1 The internal air-filtration unit mounted on the back panel of
the monitor.
The internal air-filtration unit can be removed simply by unscrewing
the unit by hand. The unit is shown in Fig.11.2.
Fig.11.2 The internal air-filtration unit
Inside the unit, a fine (10µm) filter-paper removes fine dust particles
and other suspended matter from air samples before they reach the
measurement chamber of the Monitor.