KROHNE ALTOSONIC V EN User Manual
Page 93
ALTOSONIC V
Operating Manual rev02 E
7.30850.34.00
Page 93 of 106
proces temperature and pressure can be copied to the external temperature and pressure but note
that 1°C difference causes about 0.1% error, and 1 bar difference causes about 0.01% error.
Practice shows that both repeatability and linearity improve when comparing calculated standard
values.
It is possible to compare the proces volumetric total of the external flow meter with the proces
volumetric total of the UFP-V but then the ALTOSONIC V must also be set as only calculating proces
volume.
Description of the controls in this window:
Function keys do the controls of this window, therefore it is only possible to go back to the Main
window.
F1
: Go back to Main window
F2 (or ENTER)
: Disable/enable value change of the K factor manually
F3 (or arrow up)
: If value change is enabled (F2) increase value
F4 (or arrow down)
: If value change is enabled (F2) decrease value
F5 (or
: If value change is enabled F2) increase step value of change (F3,F4)
F6 (or
F7 (or
: Start proving, reset of totals and errors on both UFP-V and External
F8 (or
: Install found NEW K factor and start prove as described in F7
F10 (or < B> )
: Save configuration if K factor is manually installed
Note: Starting a prove involves resetting of resetable totalisers and occurred alarms.
10.2 Base Sediment and water (BSW)
The Base Sediment and Water (BSW) is inputted by AD input or Modbus as a percentage of the
volume flow.
The actual value of the BS&W percentage is provided through modbus: F7591
or alternatively on an AD input channel if the modbus connection times out for more than 30 seconds.
It is off course also possible to input the value only by the AD-input.
The nett totalisers are calculated by subtracting the BSW percentage from the gross flow (proces,
standard, mass) and totalising this into separate totalisers.
10.3 Other Standard Volume standards than API2540
Other then API2540 volume correction standards are implemented.
•
ASTM-IP (D1250, 1953)
API 11.2.1M can be used to calculate the compressibility correction.
•
LPG (GPA) TP25
API 11.2.2M is used to calculate the compressibility correction.
•
ULHC (Unstable Liquid Hydro Carbons), specially developed for the Russian
Depending on the standard choosen, under F9, F2 the configuration can be made