Burkert Type 8070 - Manual (Page 16)

14
SettingandFunctions
9.2. Operation as flow transmitter or pulse divider
9.2.1. Operation as a flow transmitter
For operation as a flow transmitter, the device is connected in 2-wire mode. The frequency value of the sensor (e.g. Bürkert Types
8020 Low Power, 8030 Low Power, 8070 Low Power) is converted into a 4-20 mA signal.
setting:
→
Set the K factor of the fitting used (see operating instructions of the fitting used).
→
Always set the K factor in the pulse/liter unit.
→
Associate the 4-20 mA signal with a flow rate range using the upper and lower limits.
9.2.2. Operation as a pulse divider
For operation as a pulse divider, the device is connected in 3-wire mode.
This operation makes it possible to send a pulse out on the NPN and PNP outputs each time the set volume has been counted.
The frequency value of the sensor is thus converted via the K factor and the volume set for a pulse.
setting:
→
Set the K factor of the fitting used (see operating instructions of the fitting used).
→
Set the volume for each pulse sent out on the NPN and PNP outputs.
The K factor is always set in the unit pulse/liter whatever the setting in the parameter Unit.
9.3. Operating levels
For operating the flow transmitter / pulse divider there are 2 levels available: the Read level and the configuration level.
level 1: read level
When the device is switched on, it is at the Read level. The flow rate measured by the connected sensor is indicated.
At this level use the arrow keys to successively read different values and define which of them stays displayed. The values differ
depending whether the device is operating as a flow transmitter or a pulse divider.
flow transmitter pulse divider
25.5
l / m
PV
25.5
PV Hz
12.3
PV mA
Flow rate in liters/minute
Input frequency of the flow rate
sensor [Hz]
Output current [mA]
25.5
l / m
PV
25.5
PV Hz
Flow rate in liters/minute
Input frequency of the flow rate
sensor [Hz]
Fig. 8: Level 1: Display options when operating as a flow transmitter or a pulse divider
English
Type 8022