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Maintenance
AVL 415SE Smoke Meter — Maintenance Guide
2.3.4
Sampling Probe and Sampling Line
Leak check
•
Check the thread, sealing surfaces and clamping points of the line fittings
and sampling line itself for leaks.
Check for soot
deposits
1.
Clean out the sampling path with cleaned, oil and condensate-free com-
pressed air.
2.
Replace the sampling lines if necessary.
Sampling probe
1.
Dismantle the exhaust gas sampling probe at least once a year if not more
often, depending on use.
2.
Remove soot and other deposits.
3.
Lubricate the thread and clamping points with lead-free anti-sticking agent
(e.g. with assembly spray SF01, material number HK0029).
Sampling probe standard
Material number: BO3144SP
Sampling line
In exceptional cases, the surface characteristics of soot deposits may result in
reduced measurement value accuracies (because soot is deposited as the gas
is drawn through and not blown out completely again during purging).
Depending on the operating states of the engine and/or the kind of particles,
deposits in the hose can develop that cannot be removed using compressed air.
This deposit can "filter" particles out of the measurement gas and cause
measurement deviations.
NOTICE
Disconnect the probe and line from the AVL 415SE before cleaning them with
compressed air.
Under no circumstances the gas path from upper clamping piece of the suction
unit to direction SAMPLE OUT may be pressurised with compressed air (see
Fig. 3 page 27 in the operating manua
l).
If compressed air is used to clean the suction unit, the clamping pieces, tube and
the
2
/
2
way valves MV3 (and MV4), these valves must be "electrically opened" –
this is only possible by switching on the according valve in the service menu
using the SERVICE MODE (1 = "SWITCHED ON").
Never apply compressed air in this case, if the filter paper is mounted.
Do not blow pollutants into the ambient air. Dispose of pollutants in accordance
with your local regulations.
NOTICE
Apply the paste sparingly so that none gets into the gas path!
Fig. 6 Sampling probe standard
(Available in the eSpares
TM
Webshop)