Siemens Parameterization of Sitrans P300, Parameters Input keys Hart com Munication

© Siemens AG 2008

SITRANS P measuring instruments for pressure

Transmitters for food, pharmaceuticals and biotechnology

SITRANS P300 for gage and absolute pressure

The input pressure (pe) is transferred to the absolute pressure sensor (5) via the seal diaphragm (3) and the filling liquid (4), displacing its measuring diaphragm. The displacement changes the resistance value of the four piezo resistors in the measuring diaphragm in a bridge circuit. The change in the re-

2pressure.

Parameterization of SITRANS P300

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.sistance causes a bridge output voltage proportional to the input

		+
SITRANS P	230 ... 1100 W	Power supply
transmitter
	HART
	communicator

Communication between a HART communicator and a pressure transmit- ter

When parameterizing with the HART communicator, the connec- tion is made directly to the 2-wire system.

SITRANS P	230 ... 500 W	Power supply
transmitter

PC or

HARTlaptop modem

RS 232

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 on SITRANS P300 with HART communi- cation

Parameters	Input keys	HART com-
		munication
Start of scale	x	x
Full-scale value	x	x
Electrical damping	x	x
Start-of-scale value without application	x	x
of a pressure ("Blind setting")
Full-scale value without application of a	x	x
pressure ("Blind setting")
Zero adjustment	x	x
Current transmitter	x	x
Fault current	x	x
Disabling of keys, write protection	x	x1)
Type of dimension and actual dimension	x	x
Input of characteristic		x
Freely-programmable LCD		x
Diagnostics functions		x

1)Cancel apart from write protection

Diagnostic functions for SITRANS P300 with HART communica- tion

•Zero correction display

•Event counter

•Limit transmitter

•Saturation alarm

•Slave pointer

•Simulation functions

•Maintenance timer

Available physical units of display for SITRANS P300 with HART communication

Physical variable	Physical dimensions
Pressure (setting can also be made	Pa, MPa, kPa, bar, mbar, torr, atm,
in the factory)	psi, g/cm2, kg/cm2, inH	2	O, inH O
			2
	(4 °C), mmH2O, ftH2O (20 °C),
	inHg, mmHg
Level (height data)	m, cm, mm, ft, in
Volume	m3, dm3, hl, yd3, ft3, in3, US gal-
	lon, lmp. gallon, bushel, barrel,
	barrel liquid
Mass	g, kg, t, lb, Ston, Lton, oz
Temperature	K, °C, °F, °R
Miscellaneous	%, mA

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Siemens FI 01 · 2009