13 User modes
FLUXUS G831ST-HT
13.1 StandardUser mode
105
UMFLUXUS_G831ST-HTV1-0EN, 2021-06-01
• Enter the measured value of the transmitter.
• Press ENTER.
• Enter the measured value of the reference flowmeter.
• Press ENTER.
• Repeat the input for all pairs of measured values.
• Press ENTER after each input.
• Select
Yes
to apply the calibration curve for negative flow velocities as well. Select
No
if it is not to be used for negative
flow velocities.
13.1.3
Settings for steam measurement
In the menu item
Use satur. steam curve
it is possible to select whether the saturation pressure is to be calculated
from the temperature or the saturation temperature from the pressure during the steam measurement.
• Select the menu item
Special settings
in the program branch
Options
.
• Press ENTER until the menu item
Use satur. steam curve
is displayed.
• Select
Tf -> Pf
, if the fluid pressure has to be calculated from the fluid temperature. Select
Pf -> Tf
, if the fluid
temperature has to be calculated from the fluid pressure. Select
No
if the pressure and temperature are independently
available.
• Press ENTER.
If
Tf -> Pf
or
Pf -> Tf
is selected, the information concerning the calculated quantity will be displayed in the program
branch
Parameters
after the fluid temperature or fluid pressure has been entered.
13.1.4
Parameter search range
The transmitter calculates the expected transit time of the ultrasonic signal from the defined fluid sound speed. Before the
measurement starts, the signal is searched in a range before and after the expected time. The search time can be
shortened by reducing the range. If the range of the parameter search is to small, no signal may be found. In case of
strong pressure or temperature fluctuations, the range should not be reduced.
• Select the menu item
Options
in the program branch
Special settings
.
• Press ENTER until the menu item
Signal search range
is displayed.
• Enter a value for the search range up to a maximum of 40 % (default: 20 %).
• Press ENTER.
Options\Special settings\Multi-point calibration\Point x=act. value
Options\Special settings\Multi-point calibration\Point x=set value
Options\Special settings\Multi-point calibration\Bidirectional use
Options\Special settings\Use satur. steam curve
Options\Special settings\Signal search range
