Instruction Manual VisGuard 2 E xtractive
Mounting
22
14265E/1
5.3.3.2
Setting the pressure monitor KZTN7
The setting screw, which is accessible from the outside and mounted centrally, can be used
for setting the switching point on the pressure monitor. Turning the screw clockwise i n-
creases the sensitivity of the switching point (switches at a lower flow velocity).
Wait approximately 20 seconds after switching on the suction fan before checking that the
flow and pressure conditions in the sampling system are stable. The electrical status signals
on the pressure monitor must be bridged from the evaluation unit during this time.
Proceed as follows to set the pressure monitor:
WORKSTEP
ADDITIONAL INFO / IMAGES
1.
Ensure that the sample lines are clean.
2.
Turn the setting screw on the pressure monitor
counter-clockwise up to the stop.
Threshold set to 0 mbar, malfunc-
tion messages suppressed.
3.
Turn on all instruments and wait for around
20 seconds until the pressure conditions have
stabilized.
4.
Slowly turn the setting screw clockwise and
count the number of turns until a malfunction
is signaled.
Determine the threshold, e.g. 10
turns.
5.
Calculate the number of turns to be set. Use
the following formula:
(number of turns / 2) - 1 = velocity to be set
e.g. (10 / 2) - 1 = 4
6.
Turn the setting screw back counter-clockwise
by the calculated number of turns.
5.3.4
Sample divider KTNPI2
The sample divider KTNPI2 is integrated into the sampling system using hose connections as
shown in drawing
KTNPI2-MB
.
The following points must be observed when using the sample divider KTNPI2:
The sample divider is made up of two parts that are connected by a hose. To ensure the
hose is routed optimally, the distance between these two parts can be adjusted up to a
maximum of 300 mm.
An adapter is supplied with the sample divider that enables the diameter of the line to
be adjusted to the diameter of the sample divider.
There is a connection for a pressure monitor on the sample divider. If this is not used,
the connections must be closed with a short piece of hose.
