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4
Function test of the Soot Test Pump
4.1
Measuring head and probe
ATTENTION!
The measuring head must be clean.
Fig. 1: Measuring head and Probe con-
nector
4.2
Tightness of the pump
The soot test can only be done properly, if the pump is tight. How to perform the tight-
ness test:
Bend and squeeze the hose with inserted piston and then pull the piston right up.
After about 3 seconds the piston should jump right down into the pump when released.
Remove the piston (20) out of the pump once again.
The piston will bebound completely, if the pump is tight.
If this does not happen, check the items listed below.
Perfect valve rings in their right
positions:
Function test of the Soot Test Pump
The clamps on the side must hold the PVC part
and the aluminium part tightly together.
The water trap at the probe connector (4) has to
be sealed off with an O-ring, this also applies to
the screwed-in sampling probe or the screwed-in
smoke tsting plug.
How to perform the function test:
•
Remove the piston (21) out of the pump.
Hold the tip of the probe into water.
•
Press the piston (21) into the pump again.
•
During this procedure, no air bubbles should es-
cape from the tip of the probe.
The valve disc (14) should not be deformed and
should lie with its bulging side on the stainless
steel spring (12). Both parts should rest unre-
stricted in the valve receiving means (24).
at the water catcher (7) at both plugs (25) (O
•
ring 5)
at the valve ring 15 (O ring 14)
•
at the valve receiving means (24) (O ring 22)
•
EN
19
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