SITRANS LH100 (7MF1572..) Transmitter for hydrostatic level
26
A5E32588610-02, 02/2014
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)
⑤
Type of protection
②
Characteristics for hazardous area
⑥
Group (gas, dust)
③
Serial number
⑦
Maximum surface temperature (temperature class)
④
Category for operating area
⑧
Group (gas)
Figure 3-1
Example of a nameplate
3.4
Mode of operation
①
Sensor
④
Protective conductor connection/
Equipotential bonding
②
Connection for auxiliary power supply
⑤
Hydrostatic pressure
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
⑤
on one side of the sensor
①
. This
pressure is compared with the atmospheric pressure. Pressure compensation is carried out using the vent pipe
③
in the
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
④
is connected to the enclosure.
Содержание SITRANS LH100
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