Instruction Manual VisGuard 2 E xtractive
Mounting
24
14265E/1
5.3.8
Purging air connection and flow divider KZTN2.1
The measuring cell in the photometer must be supplied with purging air in order to
prevent soiling of the measuring cell windows.
On sampling systems (versions 5 .. 30 m, 30 .. 500 m and multiple sampling version 30
.. 200 m, Section 2.1) that use high-power suction fans (KTNPI/G1), the vacuum in the
measuring cell is sufficient for suctioning in the purging air independently.
On sampling systems (version 0 .. 5 m,Section 2.1) that use suction fans with a lower
power (KZTN2), the purging air is tapped on the suction fan outlet via a flow divider
KZTN2.1
.
The flow divider is fastened directly onto the suction fan outlet. Information on other
connections can be found in drawing
KZTN2.1-MB
.
5.4
Sample return
CAUTION!
Observe the local regulations when disposing of the exhaust air.
The sample is suctioned in through the measuring cell by the suction fan, then returned from
the cell and disposed of. When possible, the sample should be returned to the measuri ng
channel after measurement.
