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Figure 1 Transmitter Type 7MF1562
Note
The instructions do not contain all information details of the
product for clarity reasons.
May we also point out that the contents of the instructions are
neither part of an earlier or existing agreement, acceptance or
legal relationship nor an amendment of such. All the obligations
of the Siemens AG are given by the respective contract of sale
which also contains the full and solely valid warranty conditions.
1 Technical Description
1.1 Range of Application
The type 7MF1562 is a pressure transmitter for measuring
relative pressures of the gases, liquids and steam in the
energetics and mechanical engineering industry, ship building,
water supply etc. One application example is the measuring of
the pressure of compressed air containing oil in compressors
and compressor stations.
1.2 Structure
The pressure transmitter consists of a thin-film measuring cell
with a ceramic diaphragm and electronics board both installed in
the brass housing. The electrical connection is made by a right-
angled connector (DIN 43650) with a Pg 9 cable gland. The
device is connected with the process connection G½A (external
thread) or G?A (internal thread) made of brass.
1.3 Functional Principle
The thin-film measuring cell has a thin-film resistor bridge at
which the measuring pressure p is transferred by a ceramic
diaphragm. The measuring cell output voltage is fed to an
amplifier and converted into an output current I
stage.
The device is fed by power supply U
too high a supply voltage are prevented by the protective diodes
at the input. The device is protected against high frequency
interference by an RF choke, capacitor and transorb diode
p
Measuring pressure
U/I
Output stage
U
. Constant voltage source
const
Figure 2 Transmitter Type 7MF1562, Function diagram
7MF1562
in the U/I output
o
and reverse polarity and
B
.
I
Output signal
o
U
Power supply
B
1.3 Technical Data
Functional principle and system
structure
Measuring principle
Input
Measuring variable
Measuring range
Output
Output signal
Load
Characteristic
Measuring accuracy
Measuring error (at 25°C,
characteristic deviation, hysteresis
and repetitive accuracy included)
Setting time T
99
Long-term drift
Start of scale
Span
Influence of ambient temperature
Start of scale
Span
Vibration influence
Influence of power supply
Operating conditions
Ambient conditions
Ambient temperature
Storage temperature
Protection type (acc. to EN 60
529)
Electromagnetic compatibility
Spurious emission
Interference strength
Measuring medium conditions
Measuring medium temperature
Measuring medium pressure limit
Construction
Weight
Dimensions
Material of the parts which come into
contact with the measuring medium
Measuring cell
Process connection
O-ring
Material of the parts which do not
come into contact with the measuring
medium
Housing
Connector
Process connection
Electr. connection (DIN 43 650)
Power supply
Terminal voltage at the transmitter
1.4 Ordering Data
Upper measuring
medium
pressure limit
Range
0 bis/to 16 bar
34 bar
0 bis/to 25 bar
70 bar
*) Please enter the values of this column at "_ _ _" in the order number.
Thin-film DMS
Pressure
see chapter 1.5
4 to 20 mA
(U
-10 V)/0,02 A
B
linear increasing
0.5% of final value -
typical
< 0,1 s
0.3% of final value/year –
typical
0.3% of final value/year –
typical
0.3%/10 K of final value
– typical
0.3%/10 K of final value
– typical
0.05 %/g to 500 Hz in all
directions (acc. to IEC
68-2-64)
0,01 %/V
-25 °C to +85 °C
-50 °C to +100 °C
IP65
acc. to EN 50 081
acc. to EN 50 082
-30 °C to +120 °C
see chapter 1.5
about 0.2 kg
see fig. 3
AI
O
- 96 %
2
3
Brass, M-no. 2.0402
Viton
Brass, M-no. 2.0402
Plastic housing, DIN 43
650, form A
G½A external thread
G½A internal thread
Pg 9
10 to 36 V DC
Order no.
7MF1562- _ _ _ 00+
Pressure *)
3CA
3CB
3
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