With the rapid globalization of markets, numerous international standards and approvals are becoming necessary; therefore, Yokogawa instruments have acquired various international certifications including explosion proof, electromagnetic compatibility EMC , and communication protocols. Flow Configuration Software FlowNavigator FSA is a software package that provides various functions required to easily set mass flow parameters of field devices.
The flow calculation setting software consists of the following two programs. Vortex flowmeters generally affect flow measurement accuracy when the flow velocity distribution in the pipe is biased. Necessary straight pipe length and main points are shown along with typical installation examples. Install the valve on the downstream side of the flowmeter.
Keep 5D or more for downstream straight pipe length. In case the valve has to be installed on the upstream of the flowmeter, ensure the upstream straight pipe length to be 20D or more, and the downstream straight pipe length be 5D or more. If the pipe is always filled with fluid, the mounting direction does not matter whether it is horizontal, vertical or inclined.
However, in the case of horizontal and inclined, be sure to install the terminal box or converter above the piping position in order to avoid flooding. In addition, when setting parameters using the keys, the setting item number is displayed in the upper, and the value of the parameter is displayed in the lower. You can easily access the parameters as well as setup via communication. By checking the alarm number, you can easily grasp what is happening now.
In the case of Multi-Variable Type, not only flow rate but also measured temperature can be output. The digitalYEWFLO vortex flowmeter outputs by the status output function when an alarm is generated as a result of self-diagnosis. In addition, by sending this status output signal to the solenoid valve via a relay, an emergency cutoff operation can also be performed. Status contact is on when the measured flow rate falls below the set threshold. By detecting the flow rate drop early, stable flow rate can be continued.
Mobile application enables easy access to device information necessary for plant maintenance work. You can search for device information and documentation such as General Specifications, User's Manual, Test Certificate by specifying serial number or scanning QR Code on the device. Compatibility check between a failed device and a spare device is also possible. Yokogawa will contribute to improving the efficiency of customer's plant maintenance work by providing instant access to device information.
It is possible to reduce the time for start-up by preparing multiple devices with the same settings with a simple operation. Early in the 20th century, a Hungarian-American mathematician and physicist, Theodore von Karman, discovered that a fluid or gas flowing perpendicularly pass a bluff body would generate alternating vortices on both sides of the body.
The path of these vortices is called the von Karman vortex street. Von Karman found that if the frequency of these vortices was measured, that the frequency is proportional to the flow velocity that is generating the vortices.
This frequency is called the Karmen Vortex Frequency. The relationship of the frequency and the flow velocity can be mathematically expressed with the following formula:. From the equation, we can see that the frequency is proportional to the velocity.
If we can measure the frequency f , know the Strouhal number St , know the shedder bar width d ; we can solve for v velocity. As vortices form and pass the shedder bar the bluff body , they create a low pressure as compared to the rest of the fluid. This low pressure produces a differential pressure dp across the shedder bar. The high pressure side of the dp exerts stress on the shedder bar in the direction of the low pressure. As the location of the low pressure side alternates due to the vortices switching from side-to-side, the change in direction of the exerted force causes the shedder bar to oscillate.
This oscillation is equal to the Karmen Vortex Frequency. There are several methods in the marketplace to measure the oscillation. Diaphragms or capacitance sensors are two of the more common; but, the best method is the use of Piezo-electric crystal sensors.
These sensors, when compressed, produce an electric signal that can be sent to the Flow meter's electronics. Now that the Karmen Vortex Frequency is measured and we know the St and d , the flow meter electronics can do simple calculations to determine volumetric flow through the pipe. In the past, some process conditions required manual adjustment to compensate for piping vibration noise. The SSP function only outputs the appropriate vortex frequencies, even under fluctuating flow rate conditions.
The digitalYEWFLO series vortex flow meter provides diagnostic messages on high vibration environments, excessive flow fluctuations, and clogging or plugging in the area around the shedder bar. Analysis of the process allows true condition-based maintenance. Remote electronics allows you to locate the indicator away from the process measurement point and to a more convenient visible area.
The picture to the left shows a Stainless Steel housing. Advanced pre-delivery programming and calibration are included, so customers can easily integrate the vortex flow meter into their system with minimal downtime.
Noise caused by strong piping vibration may affect the accuracy of vortex frequency detection. The two piezoelectric elements in the digitalYEWFLO are installed in a configuration that is polarized, so they are not affected by vibration in the flow or vertical directions.
The noise of vortex lift -direction vibration is reduced by adjusting the outputs of the piezoelectric elements. Steam has often been described as the 'lifeblood' of the industry. Vortex meters are known to be superior devices for steam flow measurement due to their inherent linear measurement, large turndown, low pressure drop, and high accuracy.
Our multivariable vortex flow meter features: Embedded temperature sensor Built-in steam tables Self-diagnostics functions Simultaneous displays of mass flow rate and temperature on two-line LCD indicator. Built-in Steam Tables Built-in steam tables provide temperature references for pressure based on the saturated steam conditions. Applications Steam Flow Measurement Steam has often been described as the 'lifeblood' of the industry.
Application Notes Yokogawa Technical Reports. Application Note. Reduced Bore for Steam Measurement. Yokogawa Technical Report. Overview: Vortex flow meters utilize a fluid phenomenon in which frequencies of Karman vortex streets released from a shedder bar inserted in a flow are proportional to flow velocities.
Stainless steel stud bolts and nuts are optional. Gaskets are supplied by the user. Check all mating flanges ensuring all weld slag is ground off and the inside surface is clean and smooth.
Note: Only the above indicated meter sizes require collars. Make sure the arrow on the side of the meter body is facing the same direction as the flow. When installing the vortex meter in a vertical pipe outdoors we recommend rotating the conduit connection to face downward reducing the chance of rain and condensate running down the conduit into the housing. The ID of the gasket must be equal to or greater than the ID of the meter bore.
Self-centering gaskets are highly recommended. When installing a vortex meter with an integral converter in a pipe to measure high temperature fluids, do not insulate the converter housing or mounting bracket. If it is necessary to insulate the entire installation, use a remote mounted converter. Custom steam jackets are available if necessary, please contact your Yokogawa Industrial Automation Representative for more information. Remove the four Allen bolts securing the housing to the bracket, rotate to the desired position and reassemble.
A special signal cable YF must be used between the vortex meter body and the remote electronics. The maximum cable length is 65 feet 20 meters. Do not splice additional cable to extend the length.
The converter may mounted on 2" nominal pipe stand horizontal or vertical using the supplied mounting bracket. To shorten the cable in the field please refer to the section on cable. Welcome to ManualMachine. We have sent a verification link to to complete your registration. Log In Sign Up.
Forgot password? Enter your email address and check your inbox. Please check your email for further instructions. Enter a new password. The benefit here is simplified calculations, and fewer things that can effect accuracy. Fluids to be measured: Liquid, gas or steam Performance specifications: Repeatability: 0.
Table 1. Stainless Steel Wafer YF 1. Stainless Steel Wafer YF 2. Stainless Steel Wafer YF 3. Stainless Steel Wafer YF 4. Hastelloy C Wafer YF 1. Hastelloy C Wafer YF 2. Hastelloy C Wafer YF 3. Hastelloy C Wafer YF 4. When data input is required, u se the a lpha k ey to tog g le betw eenthe a lpha a nd nu m eric cha ra cters A to Z, 0 to 9. ENT twice to save the changes. D The automatic power-off of the BT automatically turns off the power when no key has been pressed for about 5 minutes.
Notes: A The fu nctionk eys F1 - F4 a re u sed to execu te the com m a nds displa yed a t the bottom of the screen. Use the green shift key to select letters marked in green and the black shift key to select letters marked in black. D To go directly to a particular parameter anywhere in the menu tree while working in a menu, press either SHIFT key and then press F4. Only two parameters are supported by the TBL: Parameter E Total reset Parameter E Display Select The amplifier has been pre-configured at the factory, so no setup should be required prior to installation.
Minimum cable size: 24 AWG, 0. Stud bolts, washers and nuts are supplied with the meter Flanged Style: 1. Figure 3. Fig 3. Remove the four Allen bolts securing the terminal box to the bracket, rotate to the desired position and reassemble. You can only view or download manuals with. Sign Up and get 5 for free.
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Buy as much as you need. Activating mismatched pipe schedule bore correction Setting up the local LCD indicator display mode Removal of shedder from remote converter type Case - Polyurethane resin baked coating, frosty white. Cover - Polyurethane resin baked coating, deep, sea moss green. Measurable Flow Rates in U.
Integral, pulse output for intrinsic safety.
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