EYETECK chuyên phân phối cảm biến đo lường, cảm biến áp suất, mức, lưu lượng

1. © Siemens AG 2010
Pressure Measurement
Transmitters for basic requirements
SITRANS P Z
for gauge pressure
■ Overview ■ Design
The main components of the pressure transmitter are:
• Brass housing with silicon measuring cell and electronics
plate
2 • Process connection
• Electrical connection
The silicon measuring cell has a thin-film strain gauge which is
mounted on a ceramic diaphragm. The ceramic diaphragm can
also be used for aggressive media.
The process connection to DIN EN 837-1 is made of brass and
has a male thread G½B or a female thread G1/8B.
The electrical connection is made using a plug to DIN 43650
with a M16 x 1.5 cable inlet.
■ Function
The pressure transmitters of the SITRANS P Z for gauge pres-
sure measure the gauge pressure of aggressive and non-ag-
The SITRANS P Z pressure transmitter, (7MF1562-...) measures gressive gases, liquids and vapors.
the gauge pressure of aggressive and non-aggressive gases,
liquids and vapors. The measuring cell is temperature-compensated.
Mode of operation
■ Benefits
• High measuring accuracy
• Sturdy brass housing U
const.
• For aggressive and non-aggressive media
• For measuring the gauge pressure of liquids, gases and vapor U
p I I0, UB
• Temperature-compensated measuring cell
• Compact design
■ Application
The SITRANS P Z pressure transmitter for gauge pressure SITRANS P Z pressure transmitters (7MF1562-...), function diagram
(7MF1562-...) is used above all in the following industrial areas:
The thin-film measuring cell has a thin-film resistance bridge at
• Power engineering
which the operating pressure p is transmitted through a ceramic
• Mechanical engineering diaphragm.
• Shipbuilding The measuring cell output voltage is fed to an amplifier and con-
• Water supply etc. verted into an output current of 4 to 20 mA. The output current is
linearly proportional to the input pressure.
A concrete application example is the measurement of com-
pressed air containing oil in compressors or compressor sta-
tions.
2/4 Siemens FI 01 · 2011

2. © Siemens AG 2010
Pressure Measurement
Transmitters for basic requirements
SITRANS P Z
for gauge pressure
■ Technical specifications Design
Weight ≈ 0.2 kg (≈ 0.44 lb)
SITRANS P Z pressure transmitters for gauge pressure
Wetted parts materials
Mode of operation
• Measuring cell Al2O3 – 96 %
Measuring principle Thin-film strain gauge
Input
• Process connection
• Gasket
Brass, mat. no. 2.0402
Viton
2
Measured variable Gauge pressure
Process connection Male thread G½B
Measuring range 0 ... 16 bar g (0 ... 232 psi g) or female thread G1/8B
0 ... 25 bar g (0 ... 363 psi g)
Power supply
Output
Terminal voltage on pressure trans-
Current output signal 4 ... 20 mA mitter
Measuring accuracy as per EN 60770-1 • For current output 10 ... 36 V DC
Error in measurement (at 25 °C 0.5 % of full-scale value – typical Certificates and approvals
(77 °F), including conformity error,
hysteresis and repeatability) Classification according to For gases of fluid group 1 and
PED 97/23/EC liquids of fluid 1; complies with
Response time T99 < 0.1 s requirements of article 3, para-
graph 3 (sound engineering prac-
Long-term drift 0.3 % of full-scale value/year - tice)
typical
Influence of ambient temperature
• Start of scale 0.3 %/10 K of full-scale value -
typical ■ Dimensional drawings
• Measuring span 0.3 %/10 K of full-scale value -
typical
112 (4.4)
Rated conditions 20
(0.8)
Medium conditions
(diam 1.1)
• Temperature of medium -30 ... +120 °C (-22 ... +248 °F)
∅27
(1.97)
degree of protection to EN 60529 IP65
50
Ambient conditions
G½B
G 8B
1
• Ambient temperature -25 ... +85 °C (-13 ... +185 °F) SW 27 M16x1,5
• Storage temperature -50 ... +100 °C (-58 ... +212 °F)
SITRANS P Z pressure transmitters (7MF1562-...), dimensions in mm
(inch)
■ Schematics
I0 Output current
1+ UB Power supply
I0 UB RL Load
2-
Signal RL Connections:
1 (+UB)
2 (-UB)
SITRANS P Z pressure transmitters (7MF1562-...), connection diagram
■ Selection and Ordering data Order No. Order code
SITRANS P Z pressure transmitters for gauge pressure D) 7 M F 1 5 6 2 - 7 7 7 0 0 777
2-wire system, characteristic rising
Measured range Max. working pressure
0 ... 16 bar g (0 ... 232 psi g) 32 bar g (464 psi g) 3 CB
0 ... 25 bar g (0 ... 363 psi g) 64 bar g (928 psi g) 3 CD
Other version for measuring range ≥ 1 bar g (≥ 14.5 psi g), add Order code and plain text: 9 AA H1Y
Measuring range: ... to ... bar g (psi g)
D) Subject to export regulations AL: N, ECCN: EAR99H.
Siemens FI 01 · 2011 2/5