Heise PTE-2, Руководство по эксплуатации и обслуживанию

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The Damping Function stabilizes a measured pressure signal.
When damping is activated, the value displayed, saved to a
Datalog or transmitted to a journal (eg. To HyperTerminal) is a
filtered value. The filtering is programmable to 16 incremental
levels, allowing the damping function to be tailored to the spe-
cific requirements of most any application. The default damp-
ing level is 1. As the damping level is increased, additional
electronic filtering is applied and the response time is slowed.
Values are displayed on the HHC screen, and recorded by
Datalogging at the fastest update rate between 100 and 300
milliseconds, based on how many inputs are active. As damp-
ing level is increased the update time increases approximately
100 milliseconds per damping level. With a single pressure
module installed and damping set to maximum level 16 the
display output can lag by up to 1.6 seconds from the actual
process pressure. If two modules are installed and or voltage/
current monitoring is active the system display and Datalog
values lag will also increase. The longest display lag with two
pressure modules programmed for maximum damping and the
voltage/current monitor active is 4.8 seconds.
Set up of Damping Function
When in Measurement Mode:
1. Press DAMP key.
2. Press PORT SELECT key to choose Channel 1, Channel 2,
or both modules.
3. Press RIGHT ARROW and LEFT ARROW to move cursor to
desired damping level (16 possible positions).
4. Press ENTER to save the value and activate damping.
Once established in the set up MENU the damping process
may be enabled or disabled through the use of the DAMP key
on the keypad. To activate/deactivate the damping function:
1. Press the DAMP key on the keyboard.
2. Press PORT SELECT key to choose Channel 1, Channel 2,
or both modules.
3. Press ENTER to activate damping. Damping level will be
indicated below units of measure.
The HHC has two Datalogging modes, Manual and Auto-
matic. Manual mode is the default. Automatic Datalog mode is
described in MENU programmable features section 15f.
The first time the DATA STORE key is pressed following power
up of the HHC, a new Datalog file will be created. The Datalog
column headers will be labeled with date, user programmable
module description (default values are Channel 1, Channel
2, Ext.) and the engineering unit of measure. Programming
channel and tag names are covered in the MENU driven Data-
logging set up section 15f. The first row of the Datalog will be
populated with measurements as shown on the LCD display.
Subsequent presses of the DATA STORE key will create
manual data records into this initial Datalog.
SECTION 14 f. DAMPING FUNCTION
–0.12
in H 2 0
-0.012
PSi
<----------|----->
SECTION 14 g. MANUAL DATALOG FUNCTION