BERTHOLD TECHNOLOGIES LB 480, Руководство пользователя, Страница: 155 / 450

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
2 – 155
Volume 2 1 System Description
2
Evaluation electronics
Control and processing of the signals are carried out by the evalua-
tion electronics. The 4-20 mA measuring signal is passed through a
2-wire cable to the PCS (terminals 15 and 16).
Detector Communication
The measuring system SENSseries LB 480 uses the
HART
®
proto-
col for communication. Configuration, parameter setting and cali-
bration of the detectors, as well as the output and display of the dig-
ital units of measure are carried out either:
• via a hand-held terminal, e.g. the 375 Field Communicator by
Emerson Process Management GmbH & Co. OHG, or
• via PC with FDT frame application or
• via PC and the SIMATIC PDM software.
Access to electronics
At the top, the detector is closed by a detachable housing cover
which can be removed by unscrewing the Allen screws.
Fig. 1-3 Detector housing with connection head
Decay compensation
For automatic decay compensation, the detector is equipped with a
capacitor-buffered real-time clock. The capacitor buffers the real-
time clock for about one week. If the buffering is lost, the real-time
clock starts with the last saved date the detector was supplied with
power. A message informs you that the date has to be updated.
Do not unscrew the 6 screws
connecting the detector
housing to the connection
head.
Detector housing
Housing cover
Connection head