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７．INTEGRAL SETTING
The Dust Monitor can be set to output an averaged measuring signal by adjusting the Integration
Volume (Data averaging).
Follow the procedures below to carry out integral setting.
(The Integration Volume is set to “0 s” at our factory before shipment, unless otherwise
requested.)
1)
Set the Range Switch to “0”.
2)
Press the Mode Change Switch until the LED lamp “I.TIME SET” lights up.
(The integral setting can be adjusted while “I.TIME SET” is lit.)
3)
Turn the Integration Volume clockwise (Arbitrary setting).
(For your reference: Each LED lamp on the display shows three seconds. (30 seconds max.))
4)
To complete the integral setting, change the Range Switch to a value other than “0”.
If the Integration Volume is turned fully counterclockwise, the integral time will be set
to 0 seconds.
If a more detailed setting is needed, connect a tester to the output terminal of 4mA to 20mA
and adjust the Integration Volume by referring to the current value.
0 s (4mA) to 30 s (20mA)
Refer to
10.MAINTENANCE MODE
.
The rapid rise of an output signal shows an error in the filter system.
Analyze the filter system under the Normal mode.
Turn off the Integral mode.
In Normal mode, rapid variation of the dust density can also be monitored.
Figure 5 shows an example of monitoring a 13-line bug filter using the Dust Monitor.
Regarding dust emissions, the signal peaks indicate a low amount of dust being processed in lines
1 to 6 as well as in line 12 and 13, and a high amount of dust being processed in line 7 to 11.
According to this, the judgment whether or not the filter needs to be replaced is possible.
Filter No.
Time
Density
of the dust
Fig.5. Filter surveillance screen (example)
Set Value