164 ACF5000 FTIR ANALYZER SYSTEM | OI/ACF5000-EN REV. A
Replacing sample gas filter in the ASP block
Wearing parts
Wearing parts Item no. Replacement, comment
Sample gas filter in the
ASP block, mounted
769427 At least every 12 months, depending
on the dust content of the sample gas
Spare bag O-rings 769424 1 large and 1 small O-ring
Replacing the entire sample gas filter
To avoid the analyzer system from being shut down for prolonged periods,
the entire sample gas filter should be replaced. The filter can then be re-
moved, cleaned or replaced and assembled separately.
Cleaning or replacing sample gas filters
The ASP block is hot (approx. 180°C)!
Wear suitable protective gloves and safety goggles!
NOTICE Hydrocarbons can – particularly on an analyzer system with integrated FID –
falsify the measured values.
When fitting a new or cleaned filter, make sure that no hydrocarbons are
introduced into the analyzer system. When handling a new or cleaned filter,
wear disposable nitrile or latex gloves and use a degreased tool.
Preparing to remove the filter, interrupting measuring mode
1 Prepare a grease-free and heat-resistant working surface/shelf.
2 Lay out the degreased gripping tool (tongs, coarse tweezers or similar).
3 Lay out new filter. Make sure that the O-ring is correctly located in the
groove of the filter provided for this purpose.
4 Switch analyzer system to Zero gas probe.
5 Wait until all FTIR measured values have dropped to zero.
Removing the filter
6 Open analyzer box AU2.
7 Undo three fixing screws 1 (4 mm hexagonal spanner).
8 Remove the cover of the sample gas filter 2 from the ASP block and set
down on the prepared working surface and cool down to room temper-
ature.
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