Siemens SITRANS P - Manual (Page 68)

SITRANS P measuring instruments for pressure
Transmitters for gage, absolute and differential pressure, flow and level
DS III, DS III PA and DS III FF series
Technical description
2/68 Siemens FI 01 · 2009
2
of the measuring cell (7), thus protecting the silicon pressure
sensor from overloads.
Parameterization DS III
Depending on the version, there are a range of options for pa-
rameterizing the pressure transmitter and for setting or scanning
the parameters.
Parameterization using the input keys (local operation)
With the input keys you can easily set the most important param-
eters without any additional equipment.
Parameterization using HART communication
Parameterization using HART communication is performed with
a HART communicator or a PC.
Communication between a HART communicator and a pressure transm.
When parameterizing with the HART communicator, the connec-
tion is made directly to the 2-wire system.
HART communication between a PC communicator and a pressure
transmitter
When parameterizing with a PC, the connection is made through
a HART modem.
The signals needed for communication in conformity with the
HART 5.x or 6.x protocols are superimposed on the output cur-
rent using the Frequency Shift Keying (FSK) method.
Adjustable parameters, DS III HART
Diagnostic functions for DS III HART
• Zero correction display
• Event counter
• Limit transmitter
• Saturation alarm
• Slave pointer
• Simulation functions
• Maintenance timer
Available physical units of display for DS III HART
Table style: Technical specifications 2
Parameterization through PROFIBUS PA interface
Fully digital communication through PROFIBUS PA, profile 3.0, is
particularly user-friendly. The PROFIBUS puts the DS III PA is in
connection with a process control system, e.g. SIMATIC PSC 7.
Communication is possible even in a potentially explosive envi-
ronment.
For parameterization through PROFIBUS you need suitable soft-
ware, e.g. SIMATIC PDM (Process Device Manager).
Parameterization through FOUNDATION Fieldbus Interface
Fully digital communication through FOUNDATION Fieldbus is
particularly user-friendly. Through the FOUNDATION Fieldbus
the DS III FF is connected to a process control system. Commu-
nication is possible even in a potentially explosive environment.
For parameterization through the FOUNDATION Fieldbus you
need suitable software, e.g. National Instruments Configurator.
Adjustable parameters for DS III PA and FF Parameters Input keys
(DS III HART) HART com-
munication
Start of scale x x
Full-scale value x x
Electrical damping x x
Start-of-scale value without application
of a pressure ("Blind setting") x x
Full-scale value without application of a
pressure ("Blind setting") x x
Zero adjustment x x
Current transmitter x x
Fault current x x
Disabling of keys, write protection x x 1)
Type of dimension and actual dimension x x
Characteristic (linear / square-rooted) x
2)
x
2)
Input of characteristic x
Freely-programmable LCD x
Diagnostics functions x
+
HART
communicator
230 ... 1100 W
transmitter
SITRANS P Power supply
transmitter
SITRANS P Power supply
HART
modem
PC or
laptop
RS 232
230 ... 500 W
1) Cancel apart from write protection
2) Only differential pressure
Physical variable Physical dimensions
Pressure (setting can also
be made in the factory) Pa, MPa, kPa, bar, mbar, torr, atm, psi,
g/cm
2 , kg/cm 2 , inH
2
O, inH
2
O (4 °C),
mmH
2
O, ftH
2
O (20 °C), inHg, mmHg
Level (height data) m, cm, mm, ft, in
Volume m 3 , dm 3 , hl, yd 3 , ft 3 , in 3 , US gallon, lmp.
gallon, bushel, barrel, barrel liquid
Mass g, kg, t, lb, Ston, Lton, oz
Volume flow m 3 /d, m 3 /h, m 3 /s, l/min, l/s, ft 3 /d, ft 3 /min,
ft 3 /s, US gallon/min, US gallon/s
Mass flow t/d, t/h, t/min, kg/d, kg/h, kg/min, kg/s, g/d,
g/h, g/min, g/s, lb/d, lb/h, lb/min, lb/s,
LTon/d, LTon/h, STon/d, STon/h, STon/min
Temperature K, °C, °F, °R
Miscellaneous %, mA
Parameters Input keys
(DS III HART) PROFIBUS PA and
FOUNDATION
Fieldbus interface
Electrical damping x x
Zero adjustment (correction of
position) x x
Key and/or function disabling x x
Source of measured-value dis-
play x x
Physical dimension of display x x
Position of decimal point x x
Bus address x x
Adjustment of characteristic x x
Input of characteristic x
Freely-programmable LCD x
Diagnostics functions x
© Siemens AG 2008