Burkert Type 8623 - Manual (Page 19)

8623 - 17
english
7.3.6 External default set-value (C.02)
For external default set-values, enter a scale limit with time units (see 7.3.5.1).
The flow range corresponding to the standard signal (4-20 mA) must be set.
I.e., the input of the flow at 4 mA (lower limit value) and at 20 mA (upper limit
value) takes place.
Î Limit the lowest control range using the lower limit value
7.3.6.1 Lower limit value
Setting the pre-comma value of the lower limit value
Example:
Set K Factor:
4 pulses /l
gewünschter Sollwert: 199,99 l / s
=> Frequency of the flow sensor:
f = Q * K
f frequenz
= 199.99 l/s * 4 pulse / l Q Flow rate
= 800 Hz K K Factor
=> f > 625 Hz, i.e., cannot be read in
=> Set values that can be set: 0 - 156.25 l/s (corresponds to the
frequencies 0 - 625 Hz)
=> For higher set-values, a sensor with a lower K factor must be
selected.
Example: Lower limit value 0 l/min 4 mA
Upper limit value 180 l/min 20 mA
NOTE: With external set-values (standard signals) the error message
E.06 appears as soon as a signal less than 4 mA is read in.
Increase of the pre-comma value
Proceed to set the post-comma
value