VA Master FAM540
METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
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Design and function
General
FAM540 metal cone variable area flowmeters have a proven
design and are equipped with an analog, mechanical indicator or
an intelligent two-wire transmitter, i.e. the power supply and the
flow signal utilize the same leads.
FAM540 metal cone variable area flowmeters can be used to
measure the flow of gases, liquids and steam, e.g., in process
engineering, the chemical and pharmaceutical industries as well
as the food and beverage industry. They are especially suited for
use with aggressive or opaque measuring media, and are ideal
when glass tube variable area flowmeters cannot be used due to
safety considerations. For high pressures and temperatures, a
metal cone variable area flowmeter is often an essential
requirement.
Key features of the device with transmitter include the ability to
subsequently adjust devices on site to changed operating
conditions, support for the HART® protocol, and an integrated
contact output that can be configured via software. The HART®
protocol is used for digital communication between a
distributed control system/PC, a handheld terminal and the
flowmeter.
The modular design of the float enables, within specific limits,
the measuring range to be changed subsequently. This permits
devices already in use to be used for different measurement
tasks. It also permits devices in temporary storage to be
modified swiftly for a variety of measurement tasks.
1
Float guide
2
Magnet tracking system
3
Indicator housing
4
Gas damping
5
Conical meter pipe
6
Float
Figure 9: Setup (example)
The main section consists of a conical metal meter pipe with
welded flanges.
A magnet in the float translates the height of the float as a
measurement for the flow to the decouple-proof magnet
follower system of the flowmeter.
The flow rate value is indicated on a scale by a pointer mounted
on a rotating shaft.
As an optional feature, a modular two-wire transmitter can be
added to convert the flow rate value into a proportional, linear
4 to 20 mA current output signal. It is also possible to display the
flow rate value on a two-line LCD indicator, independent of the
pointer position.
The LCD indicator, which can be configured in a plain text dialog,
can be used to display the real-time flow rate and cumulative
totalizer value, as well as to conveniently configure parameters.
Change from two to one column
