Yokogawa Electric : Yokogawa Releases Enhanced Version of ADMAG AXR Series Two-wire Magnetic Flowmeters - Aiming for the top share of the global magnetic flowmeter market -
08/08/2012| 08:36pm US/Eastern
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, with low-frequency excitation that ensures stable
measurement of flow rates and high-frequency excitation that
delivers high noise resistance, thus realizing stable
measurement in a wide range of fluid conditions. This
high-performance two-wire flowmeter can be used in both
monitoring and control applications. Its installation and
maintenance costs are significantly lower because two-wire
magnetic flowmeters do not require a dedicated power supply
unit and use only a single pair of cables. Their low power
consumption also reduces running costs. In addition,
explosion-proof types suitable for installation in hazardous
areas are now available for the entire product lineup,
covering bore diameters from 25 mm to 200 mm.
Takashi Nishijima, a Director and Senior Vice President, and
Head of the Industrial Automation Platform Business
Headquarters, comments, "With field digital technologies
that make it easier to use field devices, Yokogawa is helping
its customers realize the VigilantPlant concept. We believe
that this enhanced magnetic flowmeter gives customers a wider
range of choices in digital communications and allows for
greater safety in their utilization."
Yokogawa Electric Corporation announces that it will release
an enhanced version of the ADMAG AXR two-wire magnetic
flowmeter on August 17. This enhanced flowmeter has been
certified for use in 2 (SIL2) applications, as stipulated by
the International Electrotechnical Commission (IEC), and it
supports protocol.
The enhanced ADMAG AXR two-wire magnetic flowmeter exhibits a
level of performance comparable to that of the ADMAG AXF
four-wire magnetic flowmeter. With these two flowmeters,
Yokogawa aims to take the top position in the global magnetic
flowmeter market.
Development Background
Magnetic flowmeters are used to measure the flow rates of
water, chemicals, and other conductive fluids. Two kinds
of magnetic flowmeters are in general use today, the
four-wire and the two-wire type. The former has two pairs
of cables, one for power supply and the other for signal
output, and achieves high accuracy and performance; the
latter has a single pair of cables for both signal output
and power supply, and achieves excellent cost
performance. First introduced to the market in 2009 and
installed in large numbers worldwide, our ADMAG AXR
two-wire magnetic flowmeters compare favorably to 4-wire
devices in terms of measurement accuracy and low noise
characteristics.
To meet our customers' needs for safer plant operations,
Yokogawa has enhanced the ADMAG AXR magnetic flowmeters
by providing the following features.
Product Features
-
SIL2 certification
The enhanced ADMAG AXR has been certified for use in SIL2
applications typically encountered in the oil,
petrochemicals, chemical, and other industries, and can
be installed in areas that require functional safety. By
pairing two ADMAG AXR flowmeters, SIL3 applications can
be supported.
-
HART 7 support
In addition to HART 5, the new ADMAG AXR supports HART 7,
the latest HART protocol, eliminating the need for
convertors to connect with HART-compliant control
systems. HART 7 also supports and enables the automatic
issuance of alarms when the device's settings are
modified or a problem is detected by self-diagnostics.
Major Target Markets
A wide range of industries including chemicals, iron &
steel, water supply, and food & beverages
Applications
Measuring the flow rates of water, chemicals, and other
conductive fluids
*1 Safety Integrity Level (SIL)
SILs are defined by the IEC based on the IEC61508 standard
for safety systems that incorporate electrical and electronic
devices. There are four levels (SIL1 to 4) and SIL4 is the
strictest. At SIL2, the risk factor for a plant is reduced to
a range of 1/1,000 to 1/10,000. *2 The latest version of the
HART communication standard for control field networks, from
the HART Communication Foundation. HART technology enables
both analog and digital signals to be transmitted over 4-20mA
lines. *3 The dual frequency excitation method is a Yokogawa
innovation. With this method, a magnetic field is generated
(excitation) by supplying a current with two high- and
low-frequency components through a flowmeter coil. With the
advantages of low-frequency excitation (stability) and
high-frequency excitation (noise resistance), this method
offers greater accuracy and stability than the single
frequency excitation method.
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