KROHNE VFM 5090 EN User Manual
Page 28
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6.1
Numerical order description
6.1.1 Program
function
description
Program functions are given in numeric order as
follows
·
·
·
·
Function number and title
DESCRIPTION of the function
LIMITS - Applicable limits for numerical input.
APPEARS - Conditions when the function
appears. When any function does not
appear it is because it is not required
Fct. 1.0 OPERATION
This is the first main menu level. Submenus and their
functions grouped under Fct. 1.0 (1.x.x functions)
control the operation of the instrument in the
following areas.
- Range of flow measurement
- Display settings of measured values, units, errors
- Current and frequency output programming.
APPEARS - always
Fct. 1.1.0 BASIS.PARAM
The submenu groups the functions that do
- Setting of basic flow measurement type
(volumetric/normalized-volumetric/mass flow
measurement).
- flow range (minimum & maximum flow) to
measure.
- time constant for flow rate.
APPEARS - Always.
Fct. 1.1.1 MEAS. INST. measuring instrument
type
Set instrument to measure volumetric or normalized
volumetric or mass flow rate as per the options -
l VOLUME l NORM.VOLUME lMASS
Usually, this function is used once initially. If you
need to change the basic measurement type later on,
you should check/reprogram all flow rate and totalizer
related functions such as - MAX.FLOW,
MIN.FLOW, FLOW UNITS, TOTAL.UNITS,
0/4mA FLOW, 20mA FLOW, RANGE F, TOT.
VALUE
LIMITS - Not applicable
APPEARS - Always
Fct. 1.1.2 MAX.FLOW maximum flow rate
6.
Description of program functions
Enter the maximum flow rate desired. Max. flow
should be within the measuring range for the given
primary data (3.1.x functions) and application data
(3.5.x functions).
The frequency output range value directly
corresponds to max. flow. If flow rate exceeds max.
flow an error condition (HIGH FLOW) is generated
which may affect current output depending on
programming of Fct. 1.3.2 RANGE I.
The following units are available to choose from
depending on programing of Fct. 1.1.1 MEAS.INST.
for volumetric flow -
l m3/hr
l m3/min
l m3/sec
l Litre/hr
l Litre/min
l Litre/sec
l ft3/hr
l ft 3/min
l ft3/sec
l cft/hr
l cft/min
l cft/sec
l cuft/hr
l cuft/min
l cuft/sec
l US Gal/hr
l US Gal/min l US Gal/sec
l UK Gal/hr
l UK Gal/min l UK Gal/sec
for normalized volumetric flow -
l Norm.m3/hr l Norm.m3/ min l Norm.m3/ sec
l Norm.L/hr
l Norm.L/min
l Norm.L/sec
l Sft3/hr
l Sft3/min
l Sft3/sec
l Scft/hr
l Scft/min
l Scft/sec
for mass flow -
l Kg/hr
l kg/min
l kg/sec
l T/hr
l T/min
l T/sec
l Lb/hr
l Lb/min
l Lb/sec
LIMITS. - 1 to 10,000,000,000 Practically no limit
when entering max. flow. Real check on this
parameter is done during plausibility test. For
reference see Fct. 4.5 MAX. FLOW.
APPEARS - Always
Fct. 1.1.3 MIN. FLOW minimum flow rate Enter
the minimum flow rate in the same units as for
max.flow above. Min. flow should be within the
measuring range for the given primary data (3.1.X
functions) and application data (3.5.X functions). If
flow is below min. flow then an error condition (LOW
FLOW) will be generated. Note that this value cannot
be zero for vortex flowmeters.
LIMITS - > 0 to (0.5* max flow). Higher limit is the
50% of the value entered in Fct. 1.1.2 MAX. FLOW.
Real check on this parameter is done during
plausibility test. For reference see Fct. 4.6
MIN.FLOW.
APPEARS – Always
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