Flexim FLUXUS G601 - 11.2 Medium Parameter Input

74 UMFLUXUS_G6V4-2EN, 2011-03-29
FLUXUS G60x 11 Basic Measurement
11.2 Input of the Medium Parameters
It is possible to specify which media will be displayed in the scroll list (see section 16.5).
For the programmed parameters of common media see annex C.3.
If a medium is selected from the scroll list, the menu item for the input of the medium
temperature is displayed directly (see section 11.2.5).
If Other Material is selected or no data set for the selected medium is stored in the
transmitter (e.g. natural gas, as the parameters depend on the composition of the natural
gas), the medium parameters must be entered first.
• min. and max. sound speed
• kinematic viscosity
•density
• gas compressibility factor
11.2.1 Sound Speed
The sound speed of the medium is used for the calculation of the transducer distance at
the beginning of the measurement. However, the sound speed does not affect the mea-
suring result directly. Often, the exact value of the sound speed for a medium is un-
known. Therefore, a range of possible values for the sound speed must be entered.
Select the medium from the scroll list.
If the medium is not in the scroll list, select Other Medi-
um. Press ENTER.
Enter the average sound speed of the medium. Press EN-
TER.
This display will only be indicated if Other Medium has
been selected.
Select auto or user. Press ENTER.
auto: The area around the average sound speed is de-
fined by the transmitter.
user: The area around the average sound speed must be
entered.
Enter the area around the average sound speed of the me-
dium. Press ENTER.
This display will only be indicated if user has been select-
ed.
Medium ↕
Natural gas user
c-Medium
1500.0 m/s
c-Medium range
auto >USER<
c-Medium=1500m/s
range +-150m/s