Siemens P technical specifications ZD series for gage and absolute pressure, Functions

© Siemens AG 2008

SITRANS P measuring instruments for pressure

	Transmitters for gage, absolute and differential pressure
		ZD series for gage and absolute pressure
		At the rear of the housing is the electrical connection for the volt-
■Overview
		age supply using a current loop 4 ... 20 mA. The connection is
		made with a plug connector.
		At the front of the housing is the 5-digit display behind a glass
		cover. Underneath the display are the 3 keys for parameterizing
		the pressure transmitter. Above the display are a green and a red	2
		LED for indicating the operating status.

The ZD pressure transmitter is available in two versions (see "Di- mension drawing"):

In the radial version (type A) the display is fitted in parallel with the process connection. The display can be rotated by up to

±120° relative to the process connection.

In the axial version (type B) the display is at right angles to the process connection. The display can be rotated by 360° relative to the process connection.

■Function

Green LED	Red LED
Uref	LCD

SITRANS P pressure transmitters, ZD series, are for measuring the gage pressure, absolute pressure and level of liquids and gases.

They are used to indicate and monitor the pressure measured at the point of installation. ZD pressure transmitters are available in an axial and a radial version.

P A/D

EEP RO M

D/A

	µC
	UK
UA	U	I

600.00

mbar

3keys

EMC+

4 ... 20 mA - UH, IA

■Benefits

•Robust stainless steel housing with 2 connection versions

•Integrated display with status messages

•Thin-film measuring cell with ceramic diaphragm

•2-wire system, 4 ... 20 mA

•Parameterizable using keys underneath the housing cover

•Range adjustment 1:5 (max. 1:10)

•Measuring accuracy < 0.25% (typical)

■Application

The ZD is a configurable pressure transmitter for measuring the gage and absolute pressure of gases, liquids and vapor.

It is equipped with a display for indicating the pressure value at the point of installation.

SITRANS P pressure transmitters, ZD series, are used in the fol- lowing industrial areas for example:

•Chemical industry

•Mechanical engineering

•Food industry

•Pharmaceutical industry

•Shipbuilding

•Water supply

■Design

The pressure transmitter is comprised of a thin-film measuring cell with a ceramic diaphragm, an electronics board and a digi- tal indicator.

All parts are accommodated in a stainless steel field housing (∅ 80 mm) with a glass cover and stainless steel process con- nection.

3 keys	Configuring of parameters
A/D	Analog-to-digital converter
D/A	Digital-to-analog converter
EEPROM	Memory for all parameters
EMC	Output stage with protective components
IA	Output current
Uref	Reference voltage
LCD	Display of measured values with dimensions
Green LED	Display of normal mode
Red LED	Display of error messages or limit violation

PCeramic measuring cell

UH	Power supply
µC	Microcontroller for computing functions and monitoring

SITRANS P pressure transmitters, ZD series, mode of operation

Mode of operation

The ZD pressure transmitter has a thin-film strain gage which is mounted on a ceramic diaphragm.

The measuring cell is temperature-compensated.

Functions

The ZD pressure transmitter has a 5-digit display behind a glass cover. The following data are shown on the display:

•Measured pressure

•Technical pressure dimension (default setting: bar)

•Limit violation in upward or downward direction, indicated by LED and arrow symbols in the display

The pressure transmitter is set using the 3 input keys behind the glass cover underneath the display.

The key "M" is used to select the operating mode. Following modes of operation are available:

•Measured value

•Password

•Dimension

•Start and end of scale

•Upper and lower limit value

•Zero adjustment

Siemens FI 01 · 2009

2/17