Yokogawa ADMAG AXW Magnetic Flowmeters high accuracy flow meter
AXW025 AXW050 AXW080
Introduction
The ADMAG Total Insight (TI) series ADMAG AXW adopts the "Total
Insight" concept and totally support the product life cycle.
ADMAG AXW magnetic flowmeter is a high-quality and highly reliable
product developed based on years of experience and achievement,
such as enhancement of application by our proprietary dual
frequency excitation method.
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Specification
| output | 4 to 20 mA DC |
| Weight | 100kgs |
| Temperature Limits | 20 to 140°F |
| Accuracy | ±0.35% |
| Size | 500 to 1800 mm |
Working principle
By combining the signals obtained by low frequency excitation and
high frequency excitation, it is our unique revolutionary
excitation method that has succeeded in covering each defect and
extracting only the superiority.
It combines the advantages of low frequency excitation zero points
stability, high frequency excitation noise resistance and high
speed response.
make the pointer still refers to the zero When applying different pressure (general high pressure end is
higher than low pressure end), the force of two bellows acting on
the movable bracket is not equal, so that the corresponding
displacement is produced respectively, and drive the gear
transmission mechanism to drive and to enlarge, indicating the
differential pressure between the two after the pointer is deflect.
Performance characteristic
• Easy to read gage through undistorted plastic face permits
viewing from far away
• Patented design provides quick response to pressure changes means
no delay in assessing critical situations
• Durable and rugged housing and high-quality components combine to
provide long service life and minimized down-time
• High accuracy option is twice as accurate as the standard
Magnehelic® gage
Construction
The fluid noise that appears when measuring slurry fluid or low
conductivity fluid has "1/f characteristics".
In other words, low frequency components tend to be noisy, while
high frequency components tend to be less noisy.
Therefore, high frequency excitation is effective to ensure noise
resistance.
However, in conventional high frequency excitation, there was a
problem that "zero points become unstable".
In "Dual Frequency Excitation Method", sampling is performed in the
area not affected by noise on the high frequency side, and stable
zero points components are extracted with a large time constant on
the low frequency side.
Therefore, the synthesized signal has a very small effect of noise
and stable zero points.
ADMAG AXW can be equipped with a microSD card (optional) and can
backup / restore / duplicate parameter information using the
microSD card or a memory with a built-in LCD.
In order to realize the stability of the zero points while reducing
the influence of noise, the time constant is generally increased.
But that would hurt responsiveness.
The solution is "Dual Frequency Excitation Method" how to
simultaneously meet the effects of noise reduction, zero points
stability and response.
In “Dual Frequency Excitation Method”, high-speed response of “0.1
seconds” is possible because the change in flow rate is detected on
the high frequency side.
