Pulse Output; Relay (Option) - bürkert 8045 Bedienungsanleitung

4.4.5 Pulse Output

PULSE
+
Press simultaneously the
keys to shift the decimal
point.
RELAY
The parameters of the pulse output are defined. The volume inducing one pulse is determi-
ned. First enter the unit, then the value.
Example: 1 pulse corresponds to 100 l; Unit = litres and Pu = 100,00.
The pulse frequency is given by f = Q / Pu; frequency must never
exceed 250 Hz. Select the Pulse value in order to obtain a maximum
frequency of approx. 200 Hz
If the pulse frequency is smaller than 2Hz, the pulse width will equal
250ms.
For pulse frequencies higher than 2Hz the duty cyclic is of 50%.
If Q is greater than 250 Hz the frequency pulse will equal 0.00 Hz.
Pu

4.4.6 Relay (option)

The switching thresholds of both relays (1 -, 1 + and 2 -, 2 +) are entered within this mode.
The user also has the option to invert the relays.
Alternately, relay 2 may be used to show the direction of flow within the pipe.
The following conditions must be observed: 1- ≤ 1+, 2- ≤ 2+. By default,
the values are equal to 0, i.e. the relays are not used.
Ensure that security provisions are taken for the relay circuits (3 A max.)
Example: 1- and 2- = the low thresholds for both relays
1+ and 2+ = the high thresholds for both relays
CALIBRATION
litre
Only activated if US
(or IMP) flow units are
selected.
26
Enter the volume
corresponding to one
pulse
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