Technical Data; Application; Function And System Design; Input - Endress+Hauser Proline Teqwave MW 300 Operating Instructions Manual

Technical data

Measuring principle
Measuring system
Measured variable
166
16 Technical data
16.1

Application

The measuring device is suitable only for the measurement of solids in water-based
liquids.
Depending on the version ordered, the measuring device can also measure potentially
explosive media.
To ensure that the device remains in proper operating condition for its service life, use the
measuring device only for media against which the process-wetted materials are
sufficiently resistant.
16.2

Function and system design

Microwave transmission
Total solids measurement via microwave transmission: The device measures the time of
flight and absorption of microwave transmission between two antennas facing each other
in the measuring tube. Based on these variables, the permittivity of the medium can be
calculated, for example.
The temperature of the medium is determined in order to calculate the compensation
factor due to temperature effects. This signal corresponds to the process temperature and
is also available as an output signal.
The conductivity of the medium is derived from the change in amplitude and phase of the
microwave signal.
The device consists of a transmitter and a sensor.
The device is available as a compact version:
The transmitter and sensor form a mechanical unit.
Information on the structure of the device →  13
16.3

Input

Direct measured variables
• Total solids
• Electrical conductivity
• Medium temperature
Calculated measured variables
Load rate
The load rate can only be calculated with the volume flow of the medium. This measured
value must be read in via a flowmeter→  167.
Example of calculation:
• Volume flow read in by flowmeter: 100 l/min
• Total solids measured by Teqwave MW 300 : 10 g/l
Calculated load rate: 1 kg/min
Proline Teqwave MW 300 HART
Endress+Hauser