Appendix C:Customer Maintenance Parts List
Appendix D:Dimensional Diagrams
INDEX
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INTRODUCTION
I.INTRODUCTION
1.1GENERAL OVERVIEW
This manual provides installation, parameter setting, calibration, maintenance and troubleshooting
instructions for the YEWFLO Vortex flowmeter. Also included are standard specifications, model code
definitions, dimensional drawings and a parts lists.
All YEWFLO’s are shipped pre-configured for your application. Therefore, if you included correct
process conditions with your order, no electronic setup or parameter setting is required. For piping
and wiring connections, refer to the Installation section.
If your process conditions have changed since your order was placed, please refer to the ‘QUICKSTART’ section which is designed to simplify configuration of the YEWFLO software parameters.
Please refer to the index for immediate access to a specific procedure or the glossary located at the end
of this manual for further information on a specific term.
If you have any questions concerning the YEWFLO you received, please contact your local Yokogawa
Industrial Automation Representative or our headquarters office in Newnan, GA at 770-254-0400.
If you have technical questions regarding the installation, operation, setup or application of a
YEWFLO, please contact our Technical Assistance Center (TAC) at 800-524-SERV.
Yokogawa has manufactured this instrument according to rigorous ISO 9000 quality standards. To
ensure quality performance we recommend referencing our YEWFLO sizing program to determine the
level at which your application should be run as well as a straight meter run of 20 diameters upstream
and 5 diameters downstream. In addition to these suggestions, please follow the instructions in this
manual carefully.
We are not responsible for any instrument’s performance, if that instrument has not been properly
applied or installed in accordance with this manual, nor can we be responsible for the performance of
any instrument which has been modified or repaired by an unauthorized service center.
Note:Existing YEWFLO Style C vortex flowmeters may be upgraded to provide the features and benefits
of the New microprocessor-based Style "E" YEWFLO.
1.2PRINCIPLEOF OPERATION
1.2.1Vortex shedding
How many of you have seen a flag flapping in the breeze on a windy day? Everybody has. How many
of you have noticed that the flag flaps faster as the wind blows faster? Few haven’t. When you see a
flag flapping in the breeze, you are witnessing the same phenomenon that makes a vortex flowmeter
work. The flapping frequency is proportional to the velocity of the wind, and it’s linear! The flapping
is caused by a vortex alternately being created on either side of the flag, and moving downstream with
the wind. The vortex is a swirl of low pressure, like a tornado, that pulls the flag in the direction of the
vortex. The passing of alternating vortices down the length of the flag causes it to flap. The faster the
wind blows, the faster these vortices are created, and the faster the flag flaps. Frequency isproportional to velocity.
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INTRODUCTION
The flapping flag is a familiar example of vortex shedding that everyone should be comfortable with.
Here’s how it’s used in a vortex flowmeter. A non-streamlined part (bluff body) is inserted in the flow
stream, this obstruction in the pipe causes vortices to be alternately created (shed). We call this part
the ‘shedder bar’. The shedder bar in a YEWFLO performs two functions, it creates the vortices, and
with the addition of our piezoelectric crystals senses them too. The crystals generate an alternating
voltage waveform whose frequency is proportional to fluid velocity. The rest of the magic is taken care
of in the electronics.
Figure 1.2.1: Karman Vortices
1.2.2K-factor
The most important fact about vortex shedding is that once the physical geometry, (pipe I.D., shedder
bar width, etc.), are fixed, the frequency vs. flowrate (K-factor (pulse/gallon)) is unaffected by
changes in viscosity, density or pressure over the operating range of the specific application. To
determine the operating range use the YEWFLO Sizing program. On the other hand, an orifice plate is
directly affected by changes in any of these parameters. There is a very small temperature effect due to
expansion or contraction of the shedder bar width, which is easily compensated. Therefore, the Kfactor created in our flow stand (all YEWFLOs are wet flow calibrated) on water, is accurate for gas
too! Not so with an orifice plate. The benefit here is simplified calculations, and fewer things thatcan effect accuracy .
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Figure 1.2.2: Relationship between K-factor and Reynolds Numbers
INTRODUCTION
1.2.3Qmin
Those of you who haven’t used many vortex flowmeters may be wondering, ‘Why do we need to know
viscosity, density, pressure and temperature?’. While the K-factor is unaffected by changes in
viscosity, density and pressure, the velocity at which vortices begin to be created and become stable
enough to measure accurately will vary. We refer to this velocity as Qmin, stated in desired flow units
GPM, SCFH, etc. Here’s an example to help you understand. Let’s go back to the flag example.
We’ve all seen the flag flapping in the breeze; however, on some days we can feel the breeze blowing,
but the flag isn’t flapping. Why not? For the flag to flap, there must be enough breeze blowing, or
energy, to lift the flag and create fully developed vortices. This is the same thing that happens in the
vortex flowmeter.
The higher the fluid viscosity, the higher the velocity (more energy) required to start vortex shedding.
On the other hand, the higher the density, the lower the velocity needed to start vortex shedding. In
gases, viscosity and density can vary with pressure and temperature. Sounds complicated, but
compared to an orifice plate it’s quite simple. By using the YEWFLO sizing program, vortex meter
selection is simple. Simply enter the process conditions, the program will prompt you for them, and
presto, a performance table for all meter sizes is generated. This performance table will help you
select the best YEWFLO for the application.
1.2.4Uniquely vortex
Vortex shedding flowmeters measure flow digitally. This means, amplitude of the vortex signal is
unimportant. As long as the flow is above the Qmin threshold, only the presence or absence of a
vortex is important. Just like digital electronics, as long as the voltage is above or below a threshold
value, it is either on or off. Digital flow measurement means no zero drift or span shift . Orifice plate
flowmeters, for example, cannot make this claim, even if they are using microprocessor-based digital
D/P transmitters, they still measure the small amplitude of deflection caused by differential pressure,
and changes in temperature or pressure can shift zero and span.
1.2.5Vortex frequency
The YEWFLO uses piezoelectric crystals embedded in the shedder bar . Note that they are 1)
hermetically sealed, and 2) surrounded by a heavy wall thickness, to protect them from the
environment and the process. The positioning of the crystals is important. Although one crystal
primarily measures flow frequency, it unfortunately picks up some pipe vibration noise. The other
crystal is positioned such that it picks up primarily the pipe vibration noise. By electronically
subtracting these two signals, we are able to obtain a high signal to noise ratio for the flow signal .
The new Style "E" body design also improves the signal to noise ratio, by stiffening the shedder bar
mounting in the measurement plane, further isolating it from pipe vibration.
1.2.6Available outputs
After processing the digital vortex frequency as described above, what outputs can you get? You can
select either 4-20 mA output or voltage pulse, digital output. Output is selected by setting jumpers on
the amplifier board, and the setting the software for pulse or analog output. Analog output is twowire, and pulse output is a three-wire connection (for details see the wiring section). The pulse output
can be scaled over a range of 0-6000 Hz, down or up to maximize pulse resolution. Scaling up the
frequency output can be done to improve resolution. The pulse output is also capable of driving many
electromechanical totalizers directly without additional power.
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INTRODUCTION
1.3STANDARD SPECIFICATIONS
NOTE: For special applications, please contact your local Yokogawa Industrial Automation representative to
discuss possible enhancements to these standard specifications.
Fluids to be measured: Liquid, gas or steam
Performance specifications:
Repeatability: 0.2% of reading
Accuracy and velocity range :
Fluid Accuracy: Pulse Output Accuracy: Analog OutputVelocity
Liquid ±0.8% of reading±0.8% of reading plusup to 32 ft/sec
Gas or ±0.8% of reading±0.8% of reading plusup to 115 ft/sec
Steam±0.1% of full scale
±1.5% of reading±1.5% of reading plusfrom 115 ft/sec
Note:Gas accuracy can be improved to 0.8% over the full range by built-in software compensation. (See
how to section 4.10.)
Output signal:
Analog: 4 to 20 mADC
Pulse:Low level 0 to 2 V
High level Vs - 2V ( Vs = input supply voltage)
Pulse width 50% duty cycle
±0.1% of full scale
±0.1% of full scaleto 262 ft/sec
Ambient temperature limits:
-40º to 175ºF(-40º to 80ºC):standard unit w/o agency approval ratings
-20º to 175ºF(-30º to 80ºC):with optional digital indicator
-40º to 140ºF(-40º to 60ºC):with FM explosion-proof rating
-40º to 120ºF(-40º to 50ºC):with CSA intrinsically safe rating for integral converter
-40º to 175ºF(-40º to 80ºC):with CSA intrinsically safe rating for remote converter
Process temperature limits:
Standard remote converter:-40º to 575ºF(-40º to 300ºC)
HPT remote converter:-40º to 755ºF(-40º to 402ºC)
Cryogenic remote converter:-320º to 300ºF (-200º to 150ºC)
Integral converter:See Figure 1.3.1
Storage temperature limits:
Integral or remote standard unit:-40º to 176ºF(-40º to 80ºC)
With integral indicator or totalizer:-22º to 80ºF(-30º to 140ºC)
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INTRODUCTION
Figure 1.3.1: Operating temperature range for integral type converter
Power supply and load resistance:
Analog output:17 to 42 VDC (see Figure 1.3.2)
Pulse output:14 to 30 VDC
Maximum output wire resistance: 50 ohms
Maximum line capacitance:0.22 microfarad
Ambient humidity limits:
5 to 100% relative humidity
Process pressure limits:
-14.7 psi (full vacuum) to flange rating
Materials of construction:
Process wetted parts:
Body:CF8M (ANSI 316 stainless steel) or Hastelloy C (equivalent of
ASTM494, CW12MW)
Shedder bar:Duplex stainless steel (CD4MCU equivalent to ANSI 329 stainless
steel) or Hastelloy C (equivalent of ASTM494, CW12MW)
/HART HART communications
/HPTHigh temperature
/TBLLocal interface
/EPFEpoxy-coated electronics housing
/OSW Oxygen cleaning
/BLT304 SS nuts and bolts
/SCTStainless Steel tags wired into place
/HART HART communications
/HPTHigh temperature
/TBLLocal interface
/EPFEpoxy-coated electronics housing
/OSW Oxygen cleaning
/SCTStainless Steel tags wired into place
MATERIALS
CERTIFICATION
OPTIONS
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YEWFLO
B3
ANSI 600 lb RF flanges
*E VORTEX FLOWMETERS
*E
HASTELLOY C
WAFER
MODEL
CODE
YF1010.5" I.D. Hastelloy C Wafer
YF1021.0" I.D. Hastelloy C Wafer
YF1041.5" I.D. Hastelloy C Wafer
YF1052.0" I.D. Hastelloy C Wafer
YF1083.0" I.D. Hastelloy C Wafer
YF1104.0" I.D. Hastelloy C Wafer
-AAU Integral, 4-20 mA or pulse
-AAD Integral, 4-20 mA for intrinsic safety
-AAR Integral, pulse output for intrinsic safety
-NNN Remote converter
YEWFLO *E - HASTELLOY C WAFER
PROCESS CONNECTIONS (wafer style for mounting between)
/HART HART communications
/TBLLocal interface
/EPFEpoxy-coated electronics housing
/SCTStainless Steel tags wired into place
/ZAdditional cable, per foot
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YEWFLO
*E VORTEX FLOWMETERS
CABLE TYPE, *E
YF011Remote meter interconnecting cable
CONFIGURATION
-1Terminated ends
-0010F10 feet
-0015F15 feet
-0030F30 feet
-0050F50 feet
-0065F65 feet
METER SIZES
CERTIFICATION
*EStyle E
*E
PARTS
METERS
CABLE
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QUICK START USING THE BT100/200
II.QUICK START
BT100/BT200 HANDHELD TERMINAL
Note:If you specified the correct process conditions on your order, these parameters have been preset at the
factory; therefore, there is no need to re-enter the data.
The Style E YEWFLO is a smart communicating device with microprocessor-based technology.
When used with Yokogawa’s BT100 or BT200 handheld terminal (HHT), YEWFLO can be
configured to meet specific application needs. In addition, the optional local indicator/totalizer (TBL
option) allows setting of various parameters.
When in the analog output mode, the HHT may be connected at any point on the instrument's
4-20 mA loop. This connection superimposes a digital signal on top of the instrument’s 4-20 mA
signal making communications completely transparent to your process signal. On the other hand,
since there are no 4-20 mA wires in the pulse mode, direct connection of the HHT to the HHT
PULSE and HHT COM test points on the amplifier is necessary. Once connected, flowrate and total
can be read, tag numbers entered, meter size or any other parameter modified as required.
Additionally, you may activate or deactivate many features of the YEWFLO as necessary to meet
the requirements of your application.
The HHT will enable you to scroll through the program until you locate the parameter that you wish
to change. For communication information, see “How to communicate with the YEWFLO remotely”
in the maintenance section. Please refer to the appropriate HHT instruction manual for details on
each HHT.
To change a parameter using the BT100, insert the removable key in the lock and turn it clockwise
to the ENABLE position. If the key is not in place or if it is in the INHIBIT position, you will receive an
OPERATION ERR message on the display when you press either the INC or DEC key or try to enter
an alphanumeric value in any parameter. If this occurs, insert the key in the lock, turn it clockwise to
the ENABLE position then press either the INC, DEC or alphanumeric key as before.
2.1PARAMETER SETTINGIN BRAIN™ COMMUNICATIONS
The Model YF100*E Vortex flowmeter incorporates BRAIN™ communication functions. These
functions enable the Vortex converter to remotely carry out the following functions by
communicating with the BRAIN™ Terminal (BT100 or BT200), µXL, or Centum-XL distributed
control systems.
• Setting or changing parameters required for vortex meter operation such as tag number, flow span
and process conditions for example.
• Monitoring flowrate, totalized flow and self-diagnostics.
• 4-20 mA loop check (simulated output) and totalizer reset.
Note:When the pulse/analog jumpers are set for a pulse output, Remote BRAIN™ communication on the
4-20 mA wires is not available. Therefore parameters cannot be set or read remotely. For the BT100
to operate in the pulse output mode, the instrument must be connected to the test points labeled HHT
Pulse and HHT Com. This allows access to all parameters.
Note:Only the position of the jumpers affects remote communication ability, the software setting of pulse or
4-20 mA has no effect.
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QUICK START USING THE BT100/200
BT100 Basic Operation
1) POWER on.
2) First three key strokes will always display “Model No.”, Tag No.”, and “Self-check”.
3) Press MENU key to select desired main menu.
4) Press PMTR key to move down through the selected menu.
5) Once a parameter has been selected, use the INC or DEC keys to review options within the
parameter list. When data input is required, use the alpha key to toggle between the alpha andnumeric characters (A to Z, 0 to 9).
6) Once a parameter has been selected, push ENT twice to save the changes.
Notes: A) Use the ALPHA key to move between alpha and numeric characters.
B) To back up in the programming sequence, push H key and then PMTR when in parameter
mode or MENU when in main menu mode.
C) UPLD and DNLD keys permit copying settings from one instrument in BT100 non-volatile
memory to another instrument.
D) The automatic power-off of the BT100 automatically turns off the power when no key has been
pressed for about 5 minutes. This function is not active during the display A10: Flowrate %, A20:Flowrate, or A30: Total. The display of these values is updated every 5 seconds.
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QUICK START USING THE BT100/200
BT200 Basic Operation
1) Press ON/OFF to activate power.
2) Press ENTER key when prompted.
3) “Model”, “Tag No.”, and “Self-check” will always be displayed next.
4) Press F4 to continue. The main menu list will be displayed next.
5) Highlight the desired menu by using the up and down movement keys. Press ENTER to
access the selected menu.
6) Use the up and down movement keys to highlight the desired parameter and press ENTER to
access.
7) Once a parameter has been selected either:
a) Use the up and down movement keys to review options within the parameter. Once the
appropriate option has been selected, press ENTER twice to edit the selection.
b) Where data input is required, use the alpha key to toggle between the alpha and numeric
characters. Press ENTER twice to save the changes.
Notes: A) The function keys (F1-F4) are used to execute the commands displayed at the bottom of the
screen.
B) Use the left (<) and right (>) movement keys to change whole page of displayed information. The
“<“ key shows the preceding page and the “>“ key the following page.
C) To select a desired alpha character, always use the appropriate SHIFT key. Use the green
shift key to select letters marked in green and the black shift key to select letters marked in black.
If the alpha/numeric keys are not used in conjunction with the SHIFT key, the numeric value
shown on the key will be displayed.
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. Type the parameter designation (example B24) to be
displayed and press ENTER.
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QUICK START USING THE BT100/200
2.2YEWFLO SETUP
Note:If you specified the correct process conditions on your order, these parameters have been preset at the
factory; therefore, there is no need to re-enter the data.
The purpose of a Quick Start is to address only those parameters which must be set to establish the
operation of a meter for this application. Follow the parameters listed below and enter the data for
your particular application.
With the BT100 or BT200 properly connected to the Vortex meter begin communicating by pressing
the power button. After the power up sequence is complete, go to “ Menu B: SET 1”. The operation of
the BT100 and BT200 are slightly different. Please refer to the ‘Basic Handheld Terminal Operation’
if you are unfamiliar with how to move through the menus and parameters. The following flow chart
identifies only the parameters to be set, you may have to skip several parameters or menus to get to
the parameters shown below. Be sure to enter all values and selections shown below or they will
not be saved. If you make a typing error, use the CLR key to clear and re-enter.
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QUICK START USING THE BT100/200
2.3PARAMETER SETTINGIN HART™ COMMUNICATIONS
When specified, the model YF100*E vortex flowmeter can be provided with HART™
communication functions. (To determine if this field communication protocol has been
incorporated in your instrument, confirm the “HART” suffix is a part of the YEWFLO model code.)
These functions enable the vortex converter to remotely carry out the following by communicating
with the HART communicator:
· Setting or changing parameters required for vortex meter operation such as tag number, flow span
and process conditions.
· Monitoring flowrate, totalized flow and self-diagnostics.
· 4-20 mA loop check (simulated output) and totalizer rest
The HART communicator can interface with YEWFLO from the control room, via direct connection
to the amplifier, or any other wiring termination point on the 4-20 mA loop. Polarity does not matter.
There must be a minimum of 250 ohms between the connection and the power supply. Refer to
Figure 1.3.2 on page 7 for power supply voltage requirements and load resistance.
Note1: The output jumpers on the amplifier must be set to the analog position to communicate. Only the
position of the jumpers affects remote communication ability, the software setting of pulse or 4-20 mA
has no effect.
Note2: When Yewflo is supplied with the HART option, the TBL digital display/local operator interface
cannot be used for parameter setting and configuration. Only two parameters are supported by the
TBL:
Parameter E01: Total reset
Parameter E02: Display Select
The amplifier has been pre-configured at the factory, so no setup should be required prior to
installation. If your process conditions have changed and reprogramming is required, the menu/
parameter configuration list for YEWFLO/HART can be found in Appendix B in the back of this
manual. Refer to the instructions provided with your HART communicator or operation details. The
QUICK START section of this manual will address only those parameters which must be set to
establish the operation of the meter for a particular application. Appendix B will cross-reference the
BRAIN parameters to the corresponding HART parameters.
2.3.1Communication Specifications
Method of communication: Frequency shift keying (FSK). Conforms with Bell 202 Modem standard
with respect to baud rate and digital “1” and “0” frequencies.
Baud Rate:1,200 bps
Digital “0” Frequency:2,200 Hz
Digital “1” Frequency:1,200 Hz
Data Byte Structure:1 start bit, 8 data bits, 1 odd parity bit, 1 stop bit
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