KROHNE VFM 5090 EN - Manual (Page 30)

Fct. 1.2.5 VELO. UNITS velocity unit for display
You can choose one of the following
l m/Sec l ft/Sec l NO DISPLAY
Select NO DISPLAY if you don’t want this parameter
to be displayed.
Fct. 1.2.6 ERROR MSG. display of error messages.
If you want error messages to appear between display
of parameters in normal measuring mode, choose YES
otherwise select NO.
LIMITS - Not applicable
APPEARS - Always.
Fct. 1.2.7 CYCLE DISP. cyclic/non-cyclic display.
YES means display will cycle automatically. This
means a measured parameter is shown in selected
units for about 6 seconds and then the next parameter
in the display cycle is shown for 6 seconds and so on.
NO (non-cyclic display) means the parameter is
continuously shown on the display (to see other
parameters or to change setting use the
é key). You
may see error messages in between changeover from
one parameter to next if error(s) are present and Fct.
1.2.6 ERROR MSG. is YES.
LIMITS - Not applicable.
APPEARS - Always.
Fct. 1.3.0 CURR.OUTP. I
This submenu groups current output related functions.
APPEARS - Always.
Fct. 1.3.1 FUNCTION I current output function
Choose YES - to make current output active as per
functions Fct. 1.3.2 to Fct. 1.3.4 NO makes current
output inactive (0 mA).
LIMITS - Not applicable.
APPEARS - Always.
Fct. 1.3.2 RANGE I current output range selection
Here one selects one of the five possible range
options. To set current output as 0-20mA or 4-20mA
with/without error indication on current output. When
a range with suffix of 22=E or 2=E is selected then it
means that current output will give 22mA or 2mA
error output if any error(s) are present in the
instrument. Range options are listed below.
l 0-20 l 4-20 l 0-20/22=E
l 4-20/22=E l 4-20/2=E
LIMITS - Not applicable.
APPEARS - If Fct. 1.3.1 FUNCTION I is YES.
Fct. 1.3.3 0/4mA FLOW
Enter the flow value at which you want current output
at its minimum 0mA (for 0-20 and 0-20/22=E ranges)
or 4mA (for other range options).
LIMITS- 0 to (max_flow-(max_flow-min_flow)* 0.2)
Value is programmable from 0 upto below max_flow
by 20% of span.
APPEARS - if Fct. 1.3.1 FUNCTION I is YES
Fct. 1.3.4 20mA FLOW
Enter the flow value at which you want current output
at its maximum (20mA). This function and Fct.1.3.3
above define the current output with respect to flow
rate. Note that both the points that you define are
programmable and don’t have to correspond to min.
flow (Fct. 1.1.3) and max. flow (Fct. 1.1.2).
LIMITS - (iqmin + (max_flow-min_flow)*0.2) to 5*
max_flow. Where iqmin is the value entered in Fct.
1.3.3 0/4mA FLOW Lower limit ensures a minimum
of 20% flow span. Higher limit allows you exceed
max_flow by 5 times for current output.
APPEARS : If Fct.1.3.1 FUNCTION I is YES.
Fct. 1.3.5 VARIABLE I Current Output selection
function
Selects any one of the three options available for
current output.
Options are listed below :
· FLOW
· POWER
· NET POWER
LIMITS : Not applicable
APPEARS – If meter type is HEAT METER or NET
HEAT METER. For meter type HEAT METER ,
only flow and power options are available. For meter
type NET HEAT METER, all three options are
available.
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