HE 5750 Operating Instructions
#371627 | Version 1.1
83
15 Options
15.1 Central dust monitoring
The central dust monitoring is available as an option. Up to 3 central dust sensors, which
monitor the dust level of all chambers, are located in the pure gas duct.
The controller creates the maximum value via the number of parametrised central dust
sensors.
F12 key: activation of the menu and switching between two trend graphs:
•
Delta-p graph via different time windows
•
Dust process graph via different time windows
Note!
From
software version 2.13
, the graphic for the filter cycle times
is displayed alternately.
The filter is described in HE 5750 with additional parameters, in order to give the controller
the distance between chamber and sensor as well as
the flue gas speed
The following parameters are necessary:
distance chamber 'x' to sensor in [m]
max. gas speed [m/s] during max. flow rate
Monitoring window length [s]
Additionally the flow rate signal must be added to the control.
Note!
Dust monitoring is deactivated, if flow rate is < 10 %.
The controller calculates the current gas speed by the current air flow
Gas speed. This can be used to calculate the time it takes for a dust emission cloud from
chamber 'x' to reach the sensor. After this time, the monitoring window length starts. If a 'Dust
High' occurs, it is due to valve assigned to this monitoring window, and a respective
malfunction message is generated. The controller monitors that monitoring windows do not
overlap. In case of doubt, the pause is modified so that a sufficient gap between two windows
remains.
Note!
The parameter table for dust monitoring can be found in chapter
Parameter table (parameter groups 13-19)
