Operation Of The Electronics - Siemens SITRANS P DS III Operating Instructions Manual

First the electronics are described, and then the physical principle of the sensors which are
used with the various device versions for the individual measurement types.
3.6.2

Operation of the electronics

Description
①
②
③
④
⑤
⑥
Figure 3-6
Function
● The input pressure is converted into an electrical signal by the sensor
● This signal is amplified by the measuring amplifier
● The digital signal is analyzed in a microcontroller
SITRANS P DS III with HART
Operating Instructions, 06/2013, A5E00047092-09
Measuring cell sensor
Measuring amplifier
Analog-to-digital converter
Microcontroller
Digital-to-analog converter
Each with an EEPROM in the measuring cell
and in the electronics
Operation of the electronics with HART communication
③
converter .
and thermal characteristics.
3.6 Functional principle
⑦
HART modem
⑧
Buttons (local operation)
⑨
Display
⑩
Connection for external ammeter
I Output current
A
U Auxiliary power
H
②
and digitized in an analog-to-digital
④
and corrected with regard to linearity
Description
①
.
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