82 UMFLUXUS_G6V4-2EN, 2011-03-29
FLUXUS G60x 11 Basic Measurement
11.6.3 Value of the Sound Speed
The sound speed of the medium can be displayed during the 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 11.6.2, it is recommended to write down the sound speed for the next measure-
ment. By doing this, it will not be necessary to repeat the fine adjustment.
Also write down the medium temperature because the sound speed depends on the tem-
perature. The value can be entered in the program branch Parameter or a user defined
medium can be created for this sound speed (see section 16.2 and 16.3).
11.7 Start of the Measurement
If the standard volumetric flow rate is selected as the 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 measuring point multiplexer providing simultaneous measurement on the dif-
ferent measuring channels.
The flow 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. E.g. if
the measuring signal can not be detected immediately, the measurement time might be >
1 s.
The outputs and the serial interface continuously receive the measured values of the cor-
responding channel. The results are displayed according to the currently selected output
options. The default unit of measurement of the volumetric flow rate is m
3
/h. For the se-
lection of the values to be displayed and for the setting of the output options see chapter
12. For further measuring functions see chapter 13.
The measured values are displayed in the lower line.
Press ENTER to return to the fine adjustment of the trans-
ducer 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).
A:
act. Volume flow
31.82 m3/h
A:
act. Volume flow
* 31.82 m3/h
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