KROHNE VFM 5090 EN - Manual (Page 35)

Fct. 3.5.1 FLUID fluid type
Select whether process medium is Steam, Gas
(including air), Mixture of gases, Moist gas or Liquid.
l STEAM l GAS l GAX MIX
l WET GAS l LIQUID
LIMITS - Not applicable
APPEARS - Always.
Fct. 3.5.2 MEDIUM process medium
Select the medium from the options given below. If
the medium used is not included in the option list
select -NONE-. For all the mediums except -NONE-
instrument software calculates density of the medium
from P & T conditions which is required for meter
sizing, mass flow and normalized flow computations.
However, for unsupported medium user has to supply
density at operating P & T and density at normal
P & T (latter for normalized flow only)
Options for fluid STEAM -
l SAT STEAM l SUP STEAM
(Saturated and superheated steam)
Options for fluid Gas
l AIR l AMMONIA l ARGON
l I-BUTANE l N-BUTANE l CO
l CO2 l ETHANE l ETHYLENE
l HEXANE l HYDROGEN l H2S
l METHANE l NEON l NITROGEN
l OXYGEN l I-PENTANE l N-PENTANE
l PROPANE l XENON l -NONE-
(CO is carbon monoxide, CO2 is carbon dioxide,
-NONE- is none of the above)
Option for fluid WET GAS
l AIR l AMMONIA l ARGON
l I-BUTANE l N-BUTANE l CO
l CO2 l ETHANE l ETHYLENE
l HEXANE l HYDROGEN l H2S
l METHANE l NEON l NITROGEN
l OXYGEN l I-PENTANE l N-PENTANE
l PROPANE l XENON
Option for fluid LIQUID
l WATER l -NONE-
LIMITS - Not applicable
APPEARS - Fluid is other than GAS MIX.
Fct. 3.5.3 SAT. P/T use saturation P or T
For saturated steam only one of the operating
temperature or pressure is needed for density
calculation. Select whether you are going to specify
saturation temp. or pressure from the following
options -
l SAT TEMP l SAT.PRES.
Actual value of temp. or pressure is to be entered
under Fct. 3.5.6 TEMP.OPR or Fct. 3.5.7
PRES.OPR.
LIMITS - Not Applicable
APPEARS - if fluid is STEAM and medium is SAT
STEAM
Fct. 3.5.4 % GAS MIX percentage of gases
Select the components of gas mixture. Enter the mole
fraction percentage of gases present in the mixture of
gases. The list of gases available is given below. For
the components not present in the mixture, keep the
percentages as zero. The sum of percentages of gas
components should be equal to 100
± 0.1.
List of gases for fluid GAS MIX -
l AMMONIA l ARGON l I-BUTANE
l N-BUTANE l CO l CO2
l ETHANE l ETHYlENE l HEXANE
l HYDROGEN l H2S l METHANE
l NEON l NITROGEN l OXYGEN
l I-PENTANE l N-PENTANE l PROPANE
l XENON
LIMITS - 0 to 100 % for each gas.
APPEARS - if fluid is GAS MIX
Fct. 3.5.5. % REL HUM Relative humidity
Enter relative humidity of moist gas in the range of
zero to hundred.
LIMITS - 0 to 100 %
APPEARS - if fluid is WET GAS
Fct. 3.5.6 TEMP. OPR operating temperature
Enter the mean (average) operating temperature of the
medium. This parameter is very important since it is
involved in the following -
Flow range check - During plausibility check, flow
range of measurement is computed to see that Fct.
1.1.2 MAX FLOW and Fct. 1.1.3 MIN. FLOW are
plausible. This calculation is function of nom.
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