Instruction manual
NivuFlow 550
page 62
rev. 00 / 12.04.2017
Note
Selected sensors which have not been connected cannot be generated by the transmitter.
After finishing the parameter settings the transmitter recognises the missing or incorrectly
selected sensor and will issue an error message.
The number of selected sensors is equal to the number of the selected level measurement
ranges over the entire measurement cross section. Only one level sensor can provide a
current reading per measurement. The transmitter does not accept incorrect and erroneous
combinations.
A maximum of up to three different level sensors can be chosen.
The settings of the sensor measurement ranges can be adjusted below the channel graph.
Note
The transmitter does not recognize the type of 2-wire level sensor connected. This is why
the sensor representation on the display is not relevant for the measurement range. Per
default the transmitter will indicate the 2-wire level sensor on the display as ultrasonic
sensor measuring from top down.
Example
Air-ultrasonic sensor on the top facing downwards; pressure sensor and water-ultrasonic
sensor on the channel bottom.
The level sensors are indicated within the channel shape which has been set before in the
measurement place parameters section.
Fig. 23-9
Selecting the level sensors
Select from the following level sensor types:
•
2-Wire Level
Level measurement by using an external 2-wire sensor supplied by the transmitter.
Example:
pressure probe type NivuBar Plus or compact echo sounder type NivuCom-
pact. Possible 0/4...20 mA-signals from an external transmitter such as NivuMaster or
MultiRanger can be activated here too.
•
i-Sensor
Connect ultrasonic i-Series sensors by NIVUS here. Connection is carried out via the
HART interface.
•
NIVUS Air-Ultrasonic
Level measurement from top down using an air-ultrasonic sensor type OCL-L1 or
DSM-L0. Such sensors are used for measurement in low flow levels. The level sensor
shall be installed in the centre of the channel crown (±2°) parallel to the water surface.
