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3. Referring to Figure 11, move the MODE slide switch back to RUN 1.
Figure 11: Setup procedure – Step 3 Reset MODE slide switch
4. It is now possible to calculate the dust level from the control settings. The dust level is found by reading the position
of the upper rotary control and multiplying it by the position of the lower rotary control.
Example: in the above diagram, the upper rotary control reads 3 (see Figure 10 above) and the lower control reads 100
(see Figure 11 above), so the dust level can be calculated as follows:
NOTE: If it is not possible to change the LED to flashing RED, then the Sensitivity will need to be increased in the sensor
(see section 6.3.1.on page 18 for details)
STEP 4 – Set the Alarm Levels
Set the alarm levels based upon the dust level calculated in STEP 3 above. The STATUS LED on the FFD control panel is
typically RED at this point.
1. Decide the level at which the HIGH or limit alarm (RELAY 1) should be triggered.
NOTE: In general, this will depend upon the type of plant as well as your local and national guidelines and/or
regulations.
2. Program the FFD sensor with this value by adjusting the rotary controls as follows:
a) Divide the required alarm level value by 1, 10, 100, or 1000 to give a number between 1 and 10, then
b) set the UPPER rotary control to this new value and
c) set the LOWER rotary control to the divisor (i.e. 1, 10, 100 or 1000).
Example: The limit set will depend upon national or local guidelines; otherwise a multiple of the dust level established
in STEP 3 is used to set an upper limit:
If the required high alarm level is 1500 units, then
The UPPER settings control would then be set to 1.5 and the LOWER settings control would be set to 1000 (as shown in
Figure 12 below).
Figure 12: Setup procedure – Step 4
INSTALLATION AND OPERATION MANUAL – OWNER'S RECORD FFD MANUAL – FILTER FAILURE DETECTOR
Dust level = 3 x 100 = 300 units
300 x 5 = 1500 units
1500/1000 = 1.5
17
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