Sintrol S303 - Parameter 4: Alarm Limit a [%] of Range; Parameter 5: Alarm Limit B [%] of Range; Parameter 6: Alarm Delay Time [Sec]; Parameter 7: Flow Velocity in [M;S] at 4 [Ma] (S304 Only)

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8.4.4 Parameter 4: Alarm limit A [%] of Range
After Auto setup the alarm level A has been adjusted to be 5 times the dust level present during the period
automatic setup was running. This level represents 25% of Range (8mA).
To manually double the Alarm limit A: Set Parameter 4 to be 050% of Range
To manually half the Alarm limit A: Set Parameter 4 to be 012% of Range
The parameters 3 and 4 are independent! If you double the Range with Parameter 3 the
alarm limit A will stay at the same level and Parameter 4 will show half the value (12% of
Range).
8.4.5 Parameter 5: Alarm limit B [%] of Range
After Auto setup the alarm level B has been adjusted to be 20 times the dust level present during the period
automatic setup was running. This level represents 100% of Range (20mA).
To manually half the Alarm limit B: Set Parameter 5 to be 050% of Range
The parameters 3 and 5 are independent! If you double the Range with Parameter 3 the
alarm limit B will stay at the same level and Parameter 5 will show half the value (50% of
Range).
8.4.6 Parameter 6: Alarm delay time [sec]
To avoid false alarms, caused by short dust concentration peaks which may appear naturally in certain
processes the alarm delay time can be set manually 000...180 [sec], default = 30 [sec]
The default of 30 [sec] means that the dust level needs to be uninterrupted for 30 [sec] above / below the
Alarm limit A / B before the Relay switches either way.
8.4.7 Parameter 7: Flow velocity in [m/s] at 4 [mA] (S304 only)
In case that your process is highly variating in the flow speed and you require the most accurate reading of the
dust concentration, S304 offers the possibility to compensate the influencing effect of the flow speed
variation.
To compensate the influence of variations in the flow speeds you need to connect the S304 to the mA output
of a flow speed monitor (see 7.8 Connecting mA output of a flow speed meter).
Enter here the 4mA equivalent value, coming from the flow meter in 000...99.9 [m/s], default = 0 [m/s]
8.4.8 Parameter 8: Flow velocity in [m/s] at 20 [mA] (S304 only)
Enter here the 20 mA equivalent value, coming from the flow meter in 000...99.9 [m/s], default = 0 [m/s]
The default = 0 [m/s] means here that the compensation is not active.