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0. Production data
This submenu relates to the
flowmeter converter.
·
Production date
– of con-
verter
·
Serial number
– of con-
verter
·
Software
– current soft-
ware version
·
Type of meter
– type num-
ber of flowmeter converter
·
Modules used
– types of
currently used modules
(Above listed items are only for
information and user cannot
change them)
·
Date setting
– setting of
current date
·
Time setting
– setting of
current time
·
Upgrade enabled
– a new
firmware version can be
uploaded after entering PIN
·
Delete history
– archives
will be deleted after entering
PIN
·
Reset volumes
– All total-
izers will be reset after en-
tering PIN
1. Sensor
This submenu relates to the
sensor.
·
Sensor constants
– sen-
sor calibration constants
·
Excitation frequency
– of
sensor coils
·
Excitation current
– of
sensor coils
·
Suppressed flow rate
–
when flow rate is lower than
this value, it is considered
for zero. This setting is used
to suppress creeping flows.
·
Number of samples
– for
floating averaging that filters
measured flow rate value.
Higher number of samples
provides more stable flow
rate value, however it in-
creases time constant and
causes delayed reaction to
flow rate changes.
·
Filters
¨
Noise filter
partially re-
duces jump changes but
mainly removes lower peri-
odical interference. Tran-
sient edges are rounded as
can be seen in figure of re-
sponse to unit jump. The
filter is applied already on
input and thus influences
immediate flow rate value
and cumulated volume cal-
culated from it. The noise
filter introduces only negligi-
ble delay (about 0.3 sec)
and can be used almost at
all circumstances.
¨
Dynamic filter
reduces
rapid jump changes of flow
rate. It protects very effec-
tively against high short
peaks caused by interfer-
ence. Unlike averaging, dy-
namic filter cuts input signal
and interference is not in-
cluded in cumulated vol-
ume. It can however cause
delay of flow rate jump
change indication. This fact
should be considered if the
flowmeter is used for dosing
applications. Response to
unit jump can be seen in
figure.
8. Display
This submenu relates to data
shown on the display.
·
Language
– language of
displayed data. You can
select from 9 languages.
·
100 per cent
– 100 % flow
rate for bar diagram. It is
Fig. Dynamic filter
Fig. Noise filter
used only for percentage
bar diagram display; it is not
meant as range of the me-
ter.
·
Flow rate units
– You can
select from 12 preset units
or add your own user de-
fined unit. In such case you
have to enter
multiple of
flow rate
in l/s and a
unit
name
.
·
Decimal places
– Number
of decimal places of dis-
played flow rate. You can
enter 0-4 decimal places. If
5 places are entered, num-
ber of decimal places will be
dynamically changed to 4
valid decimal places.
·
Time of backlight
– Time
of display backlight in sec-
onds. When you press any
key, backlight of display
goes on. When time period
set in seconds expires since
you pressed the last key,
the backlight goes off. You
can set time period from 1
to 254 seconds. If you set 0,
backlight will never be on. If
you set 255, the display will
be permanently backlit.
·
Displayed values
–
De-
fines what items will be dis-
played. You can select any
of available items. These
will be alternately displayed
on the flowmeter display.
Press
1
to alternate dis-
played values.
·
Error messages
– Enable
or disable displaying of indi-
vidual error messages.
9. Exit
·
Exit menu
– When you
finish editing, you have to
exit menu because only af-
ter that settings are perma-
nently stored in module
memories. If you will not exit
the menu and power failure
occurs, previously entered
settings will be loaded. Also
access to menu is password
protected only when you
exit menu.
·
New password
– You can
change the access pass-
word before you finish your
editing.
Time
N
t
N
Sampling moments
Current flow rate
F
lo
w
r
at
e
Average flow rate
Fig. Averaging