Publicité
Les langues disponibles
Les langues disponibles
3.3
Design of the nameplate
①
Article number
②
Characteristics for hazardous area
③
Serial number
④
Category for operating area
Figure 3-1
Example of a nameplate
The pressure transmitter has a nameplate with the article number and other important information, such as design details
and technical specifications.
You must also observe the information in the relevant certificate for a transmitter version for use in hazardous areas.
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 wiring diagram
On one side of the sensor
immersion depth. This pressure is compared with the atmospheric pressure. Pressure compensation is carried out using the
③
vent pipe
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
SITRANS LH300 (7MF1575..) Transmitter for hydrostatic level
A5E37897183-AA, 09/2016
①
the diaphragm is exposed to the hydrostatic pressure
⑤
Type of protection
⑥
Group (gas, dust)
⑦
Maximum surface temperature (temperature class)
⑧
Group (gas)
①
Protective conductor connection/
Equipotential bonding
②
Hydrostatic pressure
④
is connected to the enclosure.
⑤
, which is proportional to the
7
Publicité
