Siemens SITRANS LH100 Mode D'emploi page 26

3.3 Design of the nameplate
The nameplate bearing the order number and other important information, such as design details and technical data, is on
the pressure transmitter.
You must also observe the information in the relevant certificate for a transmitter version for use in hazardous areas.
①
Order number (machine-readable product code)
②
Characteristics for hazardous area
③
Serial number
④
Category for operating area
Figure 3-1 Example of a nameplate
3.4 Mode of operation
①
Sensor
②
Connection for auxiliary power supply
③
Vent pipe
Figure 3-2 Pressure transmitter, mode of operation and connection diagram
Hydrostatic pressure, which is proportional to immersion depth, acts on the diaphragm
pressure is compared with the atmospheric pressure. Pressure compensation is carried out using the vent pipe
connecting cable.
The hydrostatic pressure of the liquid column acts on the diaphragm of the sensor and transmits the pressure to the
Wheatstone resistance bridge in the sensor.
The output voltage signal of the sensor is fed to the electronics, where it is converted into an output current signal of 4 mA to
20 mA.
The protective conductor connection/equipotential bonding
26
⑤
Type of protection
⑥
Group (gas, dust)
⑦
Maximum surface temperature (temperature class)
⑧
Group (gas)
④
Protective conductor connection/
Equipotential bonding
⑤
Hydrostatic pressure
④
is connected to the enclosure.
SITRANS LH100 (7MF1572..) Transmitter for hydrostatic level
⑤
on one side of the sensor
A5E32588610-02, 02/2014
①
. This
③
in the