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13
E. Damping
Adverse effect of sudden changes of flow rate or laminar flow disturbances in measuring section of the instrument (e.g., due
to fittings, bends or pumps) sensed by the instrument and causing sudden changes of displayed values or oscillations of
current output can be eliminated by setting of instrument damping.
1. Use cursor keys to select the option
DAMPING
from the main menu and confirm your selection with the
EXE
button. A
submenu will be displayed.
2. Select option
TIME
and confirm your selection by pressing the
EXE
button.
3. Select
TIME CONSTANT
from the submenu and confirm it by pressing the
EXE
button. Generally, the longer the time
constant is, the more stable the value is on the display and on the outputs; however, this option is also slower to respond
to flow changes, i.e., with time constant of 5 seconds, the instrument responds to an immediate drop of flow and displays
zero flow rate only after 5 seconds.
4. Select the option
MODE
and confirm by pressing the
EXE
button. Select
LINEAR
if damping is to be linear or
AVERAGE
if it should be calculated from several saples depending on selected time constant. Confirm your selection by pressing
the
EXE
button.
5. In option
ZONE
, select the command
EDIT
and press the
EXE
key to enable editing of bandwidth above and below stead
flow mean value in which damping should occur. Use the cursor keys to set numeric value in l/s and confirm it by pressing
the
EXE
button.
6. Select the
RETURN
option to complete the setup.
The instrument will ask if you want to save new parameters by displaying the text
SAVE SETUP?
. Select
YES
to confirm. The
flow meter will save the new parameters and switch to the normal display mode. If
NO
is selected, parameters will not be
saved.
The instrument will switch to display mode and work with the new parameters until it is switched off. When the instrument is
switched on again, it will use the original/default parameters.
D. Display
Measuring units and decimal point position are set by default in the factory and correspond to the size of the flow meter.
If this default setting does not conform to your requirements, you can change it in the main menu using the
DISPLAY
option,
and in the submenu using by selecting
UNIT
(units of immediate flow rate) and
DECIMAL POINT
(selection of places after the
decimal point for flowed quantity).
