SMAR LD290, Руководство по эксплуатации и обслуживанию

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Operation
2.3
P
V
**
P
V
%
T
E
M
P
DISPLAY
O
U
T
SENSOR
DIGITAL FILTER
T
P
DAMPING
FACTORY
CHARACTERIZATION
CUSTOMER
CHARACTERIZATION
PRESSURE
TRIM
ZPT
SPT
PV* (PRESSURE)
RACING
LO
UP
CUSTOMER
LINEARIZATION
TABLE POINTS
TABLE
NOTE:
* USER UNIT OFF
** USER UNIT ON
OUTPUT
CURRENT
TRIM
CONST
ZPT
SPT
4 mA
20 mA
4-20 mA
USER UNIT
PV%
0%
100%
USER UNIT
ON/OFF
PV**
ORIMARY INDICATION
SENDONDARY INDICATION
1 2
INDICATOR
P1 - P5
OUTPUT
Figure2.3
– LD290 – Software Block Diagram
Output
Calculates the current proportional to the process variable or manipulated variable to be
transmitted on the 4-20 mA output depending on the configuration in OP-MODE. This block also
contains the constant current function configured in OUTPUT. The output is physically limited to
3.6 to 21 mA.
Current Trim
The 4 mA TRIM and 20 mA TRIM adjustment is used to make the transmitter current comply
with a current standard, should a deviation arise.
User Unit
Converts 0 and 100% of the process variable to a desired engineering unit read out available for
the display. It is used, e.g., to get a volume or flow indication from a level or differential pressure
measurement, respectively. A unit for the variable can also be selected.
Display
Can alternate between two indications as configured in DISPLAY.