11 Basic Measurement
UMFLUXUS_G8V4-6-1EN, 2018-10-10
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11.7
Start of the Measurement
If the standard volumetric flow rate is selected as physical quantity during the gas measurement, the operating volumetric
flow rate can also be displayed.
If more than one measuring channel is available/activated, the transmitter works with an integrated multiplexer providing
simultaneous measurement on the different measuring channels.
The flow rate is measured on one measuring channel for approx. 1 s, then the multiplexer switches to the next activated
channel.
The time necessary for the measurement depends on the measuring conditions. If e.g., the measuring signal cannot be
detected immediately, the measurement duration might be > 1 s.
The outputs and the serial interface continuously receive the measured values of the corresponding channel. The results
are displayed according to the currently selected output options. The default unit of measurement of the volumetric flow
rate is m³/h. For the selection of the values to be displayed and for the setting of the output options see chapter 12. For
more measuring functions see chapter 13.
11.8
Detection of the Flow Direction
The flow direction in the pipe can be detected with the help of the displayed volumetric flow rate in conjunction with the ar-
row on the transducers:
• The fluid flows in the direction of the arrow if the displayed volumetric flow rate is positive (e.g., 54.5 m³/h).
• The fluid flows against the arrow direction if the displayed volumetric flow rate is negative (e.g., -54.5 m³/h).
11.9
Stop the Measurement
The measurement is interrupted by pressing key BRK if it is not protected by a program code (see section 13.11).
The measured values are displayed in the lower line. Press ENTER to return to the fine ad-
justment of the transducer distance (see section 11.6.1).
Press key
to display the operating volumetric flow rate.
The character * indicates that the displayed value (here: operating volumetric flow rate) is
not the selected physical quantity (here: standard volumetric flow rate).
Note!
Be careful not to stop a current measurement by inadvertently pressing key BRK!
A:act. Volume flow
31.82
m3/h
A:Norm.volume
flow
A:act. Volume flow
* 31.82 m3/h
