Siemens P - page 6

SITRANS P measuring instruments for pressure

Transmitters for gage, absolute and differential pressure

Z series for gage and absolute pressure

2/6 Siemens FI 01 · 2009

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Overview

SITRANSP pressure transmitters, Z series for pressure and absolute

pressure (7MF1564-...)

SITRANSP pressure transmitters, Z series (7MF1564-...), mea-

sure the gage and absolute pressure as well as the level of liq-

uids and gases.

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Benefits

• High measuring accuracy

• Sturdy stainless steel housing

• For aggressive and non-aggressive media

• For measuring the pressure of liquids, gases and vapor

• Temperature-compensated measuring cell

• Compact design

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Application

The pressure transmitter of the Z series for gage pressure and

absolute pressure (7MF1564-...) is used above all in the follow-

ing industrial areas:

• Chemical industry

• Pharmaceutical industry

• Food industry

• Mechanical engineering

• Shipbuilding

• Water supply

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Design

The design of the pressure transmitter is dependent on the mea-

suring range.

Measuring range <1bar (<14.5 psi)

Main components:

• Stainless steel housing with piezo-resistive silicon measuring

cell (with stainless steel diaphragm, temperature-compen-

sated) and electronics module

• Process connection made of stainless steel in diverse designs

(see Selection and Ordering data)

• Electrical connection made using a plug to DIN43650 with the

cable inlet M16 x 1.5, ½-14 NPT or round plug connector M12.

The pressure transmitters with a nominal range <1 bar g

(<14.5 psi g) are optionally available with or without explosion

protection.

Measuring range ≥1bar (≥14.5 psi)

Main components:

• Stainless steel housing with ceramic measuring cell and elec-

tronics module. The temperature-compensated ceramic mea-

suring cell has a thin-film strain gage which is mounted on a

ceramic diaphragm. The ceramic diaphragm can also be

used for aggressive media.

• Process connection made of stainless steel in diverse designs

(see Selection and Ordering data)

• Electrical connection made using a plug to DIN43650 with the

cable inlet M16 x 1.5, ½-14 NPT or round plug connector M12.

The pressure transmitters with a nominal range ≥1barg

(≥14.5psi g) are optionally available with or without explosion

protection.

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Function

The pressure transmitter measures the gage and absolute pres-

sure as well as the level of liquids and gases.

Mode of operation

SITRANSP pressure transmitters, Z series (7MF1564-...), functional dia-

gram

The mode of operation of the pressure transmitter is dependent

on the measuring range.

Measuring range <1bar (<14.5 psi)

The silicon measuring cell of the pressure transmitter has a

piezo-resistive bridge to which the operating pressure is trans-

mitted through silicone oil and a stainless steel diaphragm.

The measuring cell output voltage is fed to an amplifier and con-

verted into an output current 4... 20 mA. The output current is

linearly proportional to the input pressure

Measuring range ≥1bar (≥14.5 psi)

The thin-film measuring cell has a thin-film resistance bridge to

which the operating pressure p is transmitted through a ceramic

diaphragm.

The voltage output from the measuring cell is converted by an

amplifier into an output current 4... 20 mA or an output voltage

of 0... 10 V DC.

The output current and voltage are linearly proportional to the in-

put pressure

, U

const.