Flexim FLUXUS G704, User Manual, Page: 98 / 257

98 UMG70XV3-4EN 12.01.2009
10 Basic Measurement
Repeat the steps for all channels on which will be measured.
10.7.5 Value of the Sound Speed
The sound velocity of the medium can be displayed during measurement by pressing key
.
If an approximate range for the sound speed has been entered in the program branch
PARAMETER
and the transducer distance has been optimized afterwards as described in
section 10.7.4, it is recommended to note the sound velocity for the next measurement.
The optimization procedure does not need to be repeated then.
Also note the medium temperature as the sound speed depends on the temperature. The
value can be entered in the program branch
PARAMETER
or a user defined medium can
be defined for this sound velocity (see section 14.2 and 14.3).
10.8 Start of Measurement
If the standard volume flow is selected as physical quantity during the gas measurement,
the operating volume flow can be displayed, too.
If more than one measuring channel is available/activated, the flowmeter works with an
integrated measuring point multiplexer providing quasi simultaneous measurement on
the different measuring channels.
The flow is measured on one measuring channel for approx. 1 s, then the multiplexer
switches to the next activated channel.
Enter the new adjusted transducer distance. Press EN-
TER.
Scroll with key again until the transducer distance is
displayed and check the difference between optimum and
entered transducer distance. Repeat the steps if neces-
sary.
Note!
Never change the transducer distance during measurement without
having restarted the consistency check.
The measured values will be displayed in the lower line.
Press ENTER to return to the fine adjustment of the trans-
ducer distance (see section 10.7.3).
Press key to display the standard volume flow.
The character * indicates that the displayed value (here:
operational volume flow) is not the selected physical quan-
tity (here: standard volume flow).
Transd.Distance?
50.0 mm
L=(51.1) 50.0 mm
54.5 m3/h
DISP
DISP
A:Volume(oper.)
31.82 m3/h
A:Volume(norm.)
31.82 m3/h
DISP
A:Volume(oper.)
* 16.22 m3/h