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Description
3.4 Mode of operation
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
②
③
Figure 3-2
On one side of the sensor
is proportional to the immersion depth. This pressure is compared with the atmospheric
pressure. Pressure compensation is carried out using the vent pipe
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.
12
Sensor
Connection for auxiliary power supply
Vent pipe
Pressure transmitter, mode of operation and wiring diagram
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
SITRANS LH300 Transmitter for Hydrostatic Level
Compact Operating Instructions, 11/2022, A5E37897183-AD
⑤
, which
③
in the connecting
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