12 Advanced measuring functions
86
12.7
Uncorrected flow velocity
For special applications, the uncorrected flow velocity might be of interest.
The profile correction for the flow velocity is activated in
Special Funct.
\
SYSTEM settings
\
Measuring
\
Miscella-
neous
\
Flow Velocity
.
Uncorrected flow velocities transmitted to a PC are marked with
uncorr.
.
12.8
Measurement of high dynamic flows (FastFood mode)
The FastFood mode allows to measure flows with high dynamics.
A continuous adaptation to changing measuring conditions is only partially realized in the FastFood mode.
• The sound speed of the fluid is not updated. The last measured value of the sound speed before toggling to the Fast-
Food mode is used.
• It is not possible to change the measuring channel. The measurement takes place on one channel only. During the acti-
vation of the FastFood mode no measurement is carried out on the other channels.
• The outputs of the FastFood mode activated channel can still be used.
• Outputs for further channels (multi-channel measurement) transmit an error value.
• The measured values are stored with the storage rate of the FastFood mode (see section 12.8.2).
• The FastFood mode has to be enabled and activated.
12.8.1
Enabling/disabling the FastFood mode
Press key C. Enter the HotCode
007022
(see section 9.5).
Select
normal
to display and output the flow velocity with profile correction.
Select
uncorr.
to display and output the flow velocity without profile correction. Press EN-
TER.
If
uncorr.
is selected, each time the program branch
Measuring
is selected it will be re-
quested whether the profile correction is to be used or not.
If
no
is selected, the profile correction will be switched off.
All physical quantities will be calculated with the uncorrected flow velocity.
During the measurement, the designation of the physical quantity is displayed in capital let-
ters to indicate that the value is uncorrected.
Press ENTER.
If
yes
is selected, the uncorrected flow velocity will only be used if the flow velocity is select-
ed as physical quantity in the program branch
Output Options
.
All other physical quantities (volumetric flow rate, mass flow, etc.) will be determined with
the corrected flow velocity.
During the measurement, the designation of the physical quantity "flow velocity" is displayed
in capital letters to indicate that the value is uncorrected.
Press ENTER.
In both cases, the corrected flow velocity can also be displayed.
Press key
to scroll until the flow velocity is displayed. The uncorrected flow velocity is
marked with a "
U
".
Select
yes
to enable the FastFood mode,
no
to disable it.
If the FastFood mode is enabled, a time t has to be entered. When the FastFood mode is
started, a search run will always be started after expiration of time t.
The search run is used to optimize the amplification settings.
Enter
0
if no search run is to be carried out.
Flow Velocity
>NORMAL< uncorr.
A:PROFILE CORR.
>NO<
yes
A:FLOW VELOCITY
2.60
m/s
A:PROFILE CORR.
no
>YES<
A:Flow Velocity
*U
54.5
m/s
Enable FastFood
no
>YES<
FF-check (0=OFF)
0 min
Summary of Contents for FLUXUS WW
Page 1: ...User manual UMFLUXUS_WWV1 1EN Ultrasonic flowmeter for water and wastewater FLUXUS WW...
Page 4: ...FLUXUS WW UMFLUXUS_WWV1 1EN 2018 02 28...
Page 8: ...FLUXUS WW Table of contents 8 UMFLUXUS_WWV1 1EN 2018 02 28...
Page 144: ...FLUXUS WW D Conformity declarations 144 UMFLUXUS_WWV1 1EN 2018 02 28 D Conformity declarations...
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