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EB 9510 EN
3-1
Design and principle of operation
3
Design and principle of oper-
ation
The differential pressure meter is a
microprocessor-controlled transmitter with dp
cell for measuring, indicating and
transmitting the differential pressure,
pressure or measured variables derived from
them in stationary pressure vessels and in
transportation vehicles. The device is suitable
for cryogenic gases, liquids, gases and
vapors. Measuring ranges between 0 to
160 mbar and 0 to 3600 mbar, nominal
pressure PN 60.
The device mainly consists of a dp cell (1),
housing with transmitter and a display (6).
The differential pressure ∆p = p
1
– p
2
is
converted into an electric signal in the dp
cell by a sensor and processed in the
microcontroller (2) which controls the display
and D/A converter in the two-wire version.
Four capacitive keys (4) are used to operate
the differential pressure meter and allow us-
ers to navigate within the menu on the dis-
play.
The modular design of the differential pres-
sure meter allows it to be tailored to meet
specific requirements (see section 3.4).
Operating mode
−
Differential pressure measurement
be-
tween flow and return flow pipe as well
as pressure drop measurement across
valves and filters
−
Liquid level measurement
in stationary
pressure vessels and transportation vehi-
cles
3.1
Configuration using the
TROVIS-VIEW software
The differential pressure meter can be
configured with SAMSON's TROVIS-VIEW
Software (version 4). For this purpose, the
differential pressure meter has a digital
interface (SSP) to allow the USB port of a
computer to be connected to it using an
adapter cable (order no. 1400-9740).
The TROVIS-VIEW software enables the user
to easily configure the differential pressure
meter as well as view process parameters
online.
TROVIS-VIEW can be downloaded free of
charge from our website at www.
samsongroup.com > Service & Support >
Downloads > TROVIS-VIEW.
Note
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