KROHNE VFM 5090 EN - Manual (Page 40)

Fct. 3.9.4 PRES. FDROP Filter Pressure drop
Enter value of pressure drop across the filter at the
inlet of the compressor. (If there is no such filter
installed then keep this value as zero).
Units for this parameter entry are
l Pa l KPa l atm.
l Bar l mBar l PSI.
l Lbf / ft2 l Kg/cm2 l In. Hg.
l mm Hg l mm Water l Pa_g
l KPa_g l atm_g l Bar_g
l mBar_g l PSI_g l Lbf / ft2_g
l Kg / cm2_g l In. Hg_g l mm Hg_g
l mm Water_g
LIMITS - 0 to 2.0 atm.
APPEARS - Please refer to the NOTE.
Fct. 3.9.5 RH SUCT. Relative humidity at suction
Enter the relative humidity at the suction side (i.e.
ambient air). Units are % RH.
LIMITS - 0 to 100
APPEARS - Please refer to the NOTE.
Fct. 3.9.6 RPM ACTUAL actual rpm
Enter the measured speed of the compressor motor in
RPM.
LIMITS - 0 to 10000
APPEARS - Please refer to the NOTE
Fct. 3.9.7 RPM RATED rated rpm
Enter the rated speed of the compressor motor in
RPM.
LIMITS - 0 to 10000
APPEARS - Please refer to the NOTE.
Fct. 3.9.8 RH OP relative humidity operating
Enter the relative humidity at the meter side (i.e
Compressor outlet side). Typically this value is
100%. Units are % RH.
LIMITS - 0 to 100
APPEARS - Please refer to the NOTE.
Fct. 4.0 PARAM.ERROR
Parameter Error menu level appears if parameter
check fails in the plausibility tests. There are no
submenus under this level. When this menu is
displayed use the
è key to see the functions which
need be corrected. When you correct the parameter,
that function instantly disappears from the 4.x. list and
when all such function parameters are corrected,
menu automatically returns to 4.0 level.
APPEARS - if plausibility test detects errors when
attempting to save the configuration in non-volatile
memory.
Fct. 4.1 K-FACTOR k-factor of the primary
Enter the primary constant k-factor value. This value
is stamped on the instrument label and in units of
pulses/m3.
LIMITS - Limits are same as those given in Fct.
3.1.2
APPEARS - if k-factor is outside its limits (due to
change in the nominal diameter.)
Fct. 4.2 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.
diameter, k-factor, fluid, medium and density. Where
density depends on temp. operating for all mediums
except -NONE-.
Flow computations - When temp. sensor is not
present, value given here is used in flow computations
for mass or normalized flow and for all mediums
except -NONE- Temperature value can be entered in
one of the units same as in Fct. 3.3.2.
LIMITS - Limits are same as those given in Fct.
3.5.6
APPEARS - if operating temp. is outside its limit.
This may happen if operating temp. range is changed
without changing operating temp. such that the
operating temp. is outside its limits.
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