70ZX416241E-11 1/14
Eddysonic Flowmeter
ESL
Operation Manual
Surpass Industry Co., Ltd.
2015/2
70ZX416241E-11 2/14
Read Before Use
Before using this product, check the
compatibility of the type of liquid to use and
the wetted parts material in this product.
All users are required to carefully read and
understand this manual before operation of
the product.
Keep this manual in good condition and
close at hand for quick reference whenever
necessary.
Use the product only as intended, and only
as directed in this manual.
About This Operation Manual
The contents of this manual are subject to
change without prior notice, due to
improvements in product functionalities and
/ or performance.
No part of this manual may be reproduced
in any form or by any means.
Although this manual has been prepared
with all possible care, please do not hesitate
to contact Surpass Industry about errors,
omissions, or any other points of doubt.
Cautionary notes in this manual must be
fully understood and complied with at all
times.
Important Safety Instructions
<Symbols in This Operation Manual>
Warnings and cautionary notes are provided in this manual to ensure this product is used correctly and to
prevent personal injury and property damage. The meanings of the WARNING and CAUTION symbols in
this manual are as described below. Read and understand these notes before reading the rest of this
manual.
DANGER
WARNING
CAUTION
This symbol indicates warnings against impending danger
which, if not observed, may cause death or severe injury to
the user.
This symbol indicates warnings which, if not observed, may
cause death or severe injury to the user.
This symbol indicates warnings which, if not observed, may
physically impair the user or damage surrounding objects.
Provides important notices and instructions for correct operation
of the product.
Specific Warnings
WARNING
This product is not explosion-proof. Never use it with
flammable fluids such as solvents. Doing so may
cause fire and or explosion and is highly dangerous.
Never use with gas-permeable liquids (hydrofluoric
acid, hydrochloric acid, nitric acid, ozone, etc.). Gas
permeation may lead to product failure.
Never disassemble or alter the product.
Doing so will cause breakage of the product and
possible liquid leakage. The use of dangerous
chemicals, solvents, and gases may cause physical
impairment.
Do not insert screwdrivers, wires, or other objects into
the tube parts. Doing so will cause product failure and
possible liquid leakage. The use of dangerous
chemicals, solvents, and gases may cause physical
impairment.
Refrain from excessive pulling or bending of the
cables. Doing so may cause wiring disconnections,
which may cause electrical shock and fire hazards.
WARNING
When mounting connector parts, comply with the
instructions issued by each connector manufacturer. Loose
connections may result in disconnection or chemical
leakage. The use of dangerous chemicals, solvents, and
gases may cause physical impairment.
Do not use the product in areas where corrosive gases are
being ejected. Corrosion in the body and connector may
result in liquid leakage. The use of dangerous chemicals,
solvents, and gases may cause physical impairment.
Obey these instructions.
- Refrain from excessive tightening of the connector parts.
- Do not install the product in areas of excessive vibration
or shock.
- Use the product only within the specified operating
environment. Otherwise, damage to the body and
connector may occur and result in liquid leakage. The use
of dangerous chemicals, solvents, and gases may cause
physical impairment.
This product is designed for indoor-only use. Do not apply
this product to outdoor use.
70ZX416241E-11 3/14
Product Description
Eddysonic Flowmeter, that has the part in contact with liquid made of PFA and provides connection with no
use of seal-tapes resulting in potentially leakage, is the ideal flowmeter used to measure the flow rates of
chemical liquids.
<Operating Principle>
If a liquid flows past a shedder body, a regular pattern pf vortices called Karman Vortex Street alternately
trails aft in the wake. Provided that the vortex shedding frequency is f, the width of shedder body is d, and
the flow velocity is v, the relationship of them can be expressed by the following formula.
f = St・v/d
Where St, the Strouhal Number is a dimensionless constant which defines the quality of the vortex
measurement. The Strouhal Number is constant over wide Reynolds Number ranges when the shedder
body is designed with optimal dimensions. Therefore, we can obtain the value of v , by measuring the vortex
shedding frequency f and then derive the volume flow value from the measured v.
This flowmeter, as shown below, is equipped with an ultrasonic sensor that consists of a pair of transmitter
(TX) and receiver (RX). This sensor is mounted aft the wake of the shedder body. Ultrasonic waves that
constantly are sent out from TX pass through the liquid for a certain time to reach the receiver. As shown in
below, if a Karman vortex street trails in the contrary direction to the ultrasonic wave oscillating direction, it
takes much time for ultrasonic waves to reach RX. Conversely, if a Karman vortex street trails in the same
direction as ultrasonic wave oscillating direction, it takes less time for ultrasonic waves to reach RX. Since
the ultrasonic wave oscillating time varies proportional to the vortex shedding frequency, we can obtain the
measured flow by detecting any changes in ultrasonic wave oscillating time.
This ultrasonic sensor, mounted outside the tubes connected to flowmeter, allows non-touching
measurement in which we can measure the flow rates without directly touching. Also, the ultrasonic sensor
provides the excellent features, resistance to vibration and high sensibility.
Housing
Shedder Body
Karman Vortex
RX
Ultrasonic Waves
Operating Principle of Eddysonic Flowmeter
<Circuit Block Diagram>
p
RX
Waveform
Shaping
Phase
Com
arator
Filter/Amplifier
TX
Oscillator
Circuit Block Diagram
Comparator
70ZX416241E-11 4/14
CPU
Analog Output
Pulse Output
Specifications
Model ESL-6-2.5 ESL-10 ESL-10-7 ESL-15
Applicable Fluid Fluids not corrosive or permeable against fluorocarbon resin
Flow Meter Range
(at water)(※
)
1
Measurement Accuracy
(※
)
2
Environment Humidity 5 ~ 80 %RH(Non-condensing)
Environment Temperature
Fluid Temperature
Fluid Pressure
(※
)
3
Connecting Tube Diameter
Wetted Parts PFA
Mounting Position Horizontal, vertical, or diagonal
Analog
Output
Output DC 4 ~ 20 mA
Response time Appox. 2 seconds
Load Resistance 500 Ω or less
Output NPN open collector
Pulse
Output
Excitation
Voltage/Current
Pulse Unit 10 mL/P
Pulse Range 5 ms
Power Supply DC 24 V ±10%
Current Consumption 110 mA or less
Standard cable length 2 m (78.8”)
0.4 ~ 2.5 L/min
(at 1x10
-6 m2
0.5 ~ 3.5 L/min
/s)
(at 1x10
-6 m2
/s)
0.5 ~7 L/min
(at 1x10
±2%F.S. ±5%F.S. ±2%F.S.
5 ~ 60C
(41 ~ 140F)
5 ~ 85C
(41 ~ 185F)
15 ~ 50C
(59 ~ 122F)
15 ~ 50C
(59 ~ 122F)
Max. 800 kPa (at 25C)
Max. 116 psig (at 77F)
φ1/4”xφ5/32”
(φ6.35xφ3.96)
φ3/8”xφ1/4”
(φ9.53xφ6.35)
Max. DC 30 V / 80 mA
Because the product is damaged on the condition that a fluid
temperature change occurs rapidly, please don’t use it in that condition.
To prevent abnormal output, please keep an inner pressure of pipes
more than 100kPa when stops water flow.
-6 m2
70ZX416241E-11 5/14
1 ~ 16 L/min
/s)
(at 1x10
5 ~ 60C
(41 ~ 140F)
5 ~ 85C
(41 ~ 185F)
φ1/2”xφ3/8”
(φ12.7xφ9.53)
-6 m2
/s)
70ZX416241E-11 6/14
※
Instructions on range of flow rate
1
Kinetic viscosity of liquids
-6 m2
[x 10
/s]
ESL-6-2.5 Minimum flow rate
of liquids [L/min]
ESL-10 Minimum flow rate
of liquids [L/min]
ESL-10-7 Minimum flow rate
of liquids [L/min]
ESL-15 Minimum flow rate
of liquids [L/min]
1 2 3 4 5 6 7
0.4 0.8 1.2 1.6 2.0 2.4 - 2.5
0.5 1.0 1.5 2.0 2.5 3.0 - 3.5
0.5 1.0 1.5 2.0 2.5 3.0 3.5 7.0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 16.0
Maximum flow
rate [L/min]
◎The minimum flow rates of the liquids, of which kinetic viscosity are more than 2 [x10
-6m2
/s],
are the theoretical values and may be different from the actual values.
※
Instructions on measurement accuracy
2
Because the measuring part of this flowmeter is made of resin, the temperature change of the target liquid
affects the inner diameter of the measurement tube, causing some deviation in measurement
characteristics. If the liquid temperature is higher than 50℃ and the accuracy specified by the
specifications is required, correct the output of the flowmeter using the following formula:
Actual flow volume under your operating conditions = a(I-4)x{1+(0.0006x(T-25))}
T : Liquid temperature under your operating conditions (C)
I : Output of flowmeter (mA)
a : Coefficient
Model a : Coefficient
ESL-6-2.5 0.15625
ESL-10 0.21875
ESL-10-7 0.4375
ESL-15 1
※
Instructions on operating liquid pressure
3
The maximum operating pressure depends on the liquid temperature. To derive the maximum operating
pressure for the specific liquid temperature, use the following formula:
Maximum acceptable operating pressure = 800x{1-((T-25)x0.0043)} (kPa)
T : Liquid temperature (C) at your usage
Outer Dimensions
Base
ＥＤＤＹＳＯＮＩＣ ＦＬＯＷＭＥＴＥＲ
ＥＳＬ－１０
ＳＵＲＰＡＳＳ ＩＮＤＵＳＴＲＹ ＣＯ．，ＬＴＤ．
ｗｗｗ．ｓｕｒｐａｓｓｉｎｄｕｓｔｒｙ．ｃｏ．ｊｐ
ＭＡＤＥ ＩＮ Ｊ ＡＰＡＮ
70ZX416241E-11 7/14
Cable
Flow direction indicator
70ZX416241E-11 8/14
Mounting and Connecting the Connector Parts
If you wish to anchor your Flowmeter, always use the mounting holes in the base.
In order to install connector parts correctly, always refer to the relevant catalog or operation manual is sued
by the connector manufacturer.
Before tubing, confirm the correct flow direction by checking the arrow direction of “IN→OUT”
marked on the side of flowmeter unit.
Incorrect tubing system may result in personal injury due to liquid leakage caused by damage
of flowmeter unit.
Before mounting, align the axes of tubes on both sides to avoid excessive stress to the
flowmeter. Incorrect axial alignment may result in personal injury due to liquid leakage caused
by damage of flowmeter unit.
When tubing, use tubes of the specified size. Using other tubes may result in pe rsonal injury
due to fluid leakage.
When mounting connector parts, comply with the instructions issued by each connector
manufacturer. Loose connections may result in disconnection or chemical leakage. The use of
dangerous chemicals, solvents, and gases may cause physical impairment.
Refrain from excessive tightening of the connector parts. Otherwise, damage to the body and
connector may occur and result in liquid leakage. The use of dangerous chemicals, solvents,
and gases may cause physical impairment.
The IN or OUT side’s tube of which bore diameter is smaller than that of flowmeter may
generate an error in measurement.
When using flowmeter, be sure to release the airs inside its tube. An existence of air in tubing
system may prevent the flowmeter from indicating a correct flow value.
If air bubbles enter into the liquid, the bubbles may remain in the Karman vortex generating
part of the main unit, resulting in incorrect measurement.
●The tube can be mounted in horizontal, vertical and diagonal. However, in any case, the tubing system
must be filled with the liquid at all times.
We recommend the vertical tubing system. To prevent gas-liquid two-phas e
flows, design the tubing system in which the measured liquids flow to the
upward direction (bottom-top).
Liquid filled
●Design straight-tube parts on both sides of flowmeter . The straight-tube length of IN side must be at least
7 times longer than the bore diameter, and that of OUT side mu st be at least 5 times longer than the bore
diameter.
WARNING
CAUTION
ＭＡＤＥ ＩＮ ＪＡＰＡＮ
ＳＵＲＰＡＳＳ ＩＮＤＵＳＴＲＹ ＣＯ．，ＬＴＤ．
ＥＳＬ－１０
ＥＤＤＹＳＯＮＩＣ ＦＬＯＷＭＥＴＥＲ
ｗｗｗ．ｓｕｒｐａｓｓｉｎｄｕｓｔｒｙ．ｃｏ．ｊｐ
Flowing upward
70ZX416241E-11 9/14
<Pressure at Downstream Side>
To prevent the occurrence of cavitations(※
), the pressure value at the downstream side should be more
4
than one obtained from the following formula.
Pd = 2.7⊿P+1.3P
0
Pd : Pressure values at the downstream side [kPa ]
⊿P: Pressure loss values [kPa]
P
: Vapor pressure values of liquids [kPa abs]
0
< Pressure Loss >
※
Phenomenon that the liquid evaporates, generating air bubbles, when the liquid pressure drops to the
saturated vapor pressure or below.
200
100
10
Pressure Loss⊿P[kPa]
Cavitations
4
ESL-6-2.5
ESL-10
ESL-15
1
0.1 1 10 30
Flow Rate [L/min]
70ZX416241E-11 10/14
A
Points to Observe When Installing
To prevent erroneous operation or premature wear, do not install in:
Areas of high
temperature
Areas of excessive
noise
Areas that may be
struck by lightning
●Gas-liquid two-phase flows or flows containing bubbles may result in malfunction.
●Mount the flowmeter in the places where no bubble flows into or gets trapped inside the flowmeter.
●Do not use this product for slurry liquids or liquid containing foreign substances. Such usage may
degrade the system performance.
●Do not mount heat exchangers or similar devices upstream, nearest to the flowmeter. Sharp
changes in liquid temperature may result in malfunction. Keep the heat exchanger or similar devices
away from the flowmeter to avoid sharp temperature changes.
●Do not mount the flowmeter in the places that may provide high temperature gradients or sharp
temperature changes.
●Large ripples of bellows pumps or similar devices may result in errors in measurement. Minimize the
ripples by using dampers or similar devices.
●Mount the flowmeter in the places where you can easily do inspection and tubing work.
●When wiring, do not connect the cables close to large-capacity motors or transformers, noise source
such as power sources, and high-voltage/high-current sources. Neglecting this may result in
malfunction due to induction.
Areas where corrosive
or explosive gases are
being ejected
reas that may be
submerged in water or
where subject to
splashing liquids
Areas of excessive
vibration
Outdoor
70ZX416241E-11 11/14
(
Wiring
Observe these precautions to connect the leads correctly.
※Black, Blue and F.G leads are connected each other within the circuit.
<Power Supply Connecting>
Connect to a DC24V power supply. To obtain the specified accuracy, warm up your flowmeter for at least
20 minutes.
<Analog Output>
Connect a load resistance between 4 ~ 20mA Output (+) and 4 ~ 20mA Output (-).
The value of load resistance of 500Ω or less.
<Pulse Output>
The pulse output is a NPN open collector output. Connect a load resistance between pulse output (+) and
power supply (DC24V). Below are examples of load resistance.
e.g.) Load resistance 1kΩ 1W
10kΩ 1/4W
Never do wiring work when power supply is on. Doing so may cause electrical shock.
Refrain from excessive pulling or bending of the cables. Doing so may cause disconnections
which may cause electrical shock and fire hazards.
Make sure to connect all leads correctly. Failure to do so may cause the product to fail.
Apply the voltage in the specified range. Overvoltage may result in smoking or fire.
Do not apply the voltage and current above the capacity to the pulse output (open collector
output). Damages may occur.
Red
White
Blue
Yellow
Main circuit
Black
F.G
Name of Signal Color
DC 24 V Power Supply Red
0 V Power Supply Black
4 ~ 20 mA Output (+) White
4 ~ 20 mA Output (-) Blue
Pulse Output (+) Yellow
CAUTION
Wiring diagram
Recorder
Shielding
DC 24 V
Power supply
Integrating
flowmeter
Counter)
70ZX416241E-11 12/14
<Relationship of Flow and Analog Output>
[mA]
22
20
Current Output
4
0
Overflow
(1)
Flow [L/min]
The analog output increases proportional to flow in the
range of (1) L/min.
(The Flow Range depends on the flowmeter model)
<Flow Range>
ESL-6-2.5 0.4 ~ 2.5 L/min
ESL-10 0.5 ~ 3.5 L/min
ESL-10-7 0.5 ~7 L/min
ESL-15 1 ~ 16 L/min
At overflow, the analog output levels off at the maximum
flow rate current.
(The Overflow Range depends on the flowmeter model)
<Overflow Range>
ESL-6-2.5 2.8 L/min or more
ESL-10 4 L/min or more
ESL-10-7 7.7 L/min or more
ESL-15 18 L/min or more
Maintenance and Inspection
This product should be inspected regularly, about twice a year depending on the usage.
During the regular inspection, check the
- appearance
- corrosion, clogging, leakage, etc., from the connector parts.
<Safety Notes on Maintenance and Inspection>
If using dangerous chemicals, solvents, gases, etc., make sure to wear protective, chemical
resistant gear (protective gloves, mask, and clothing) to protect your entire body. Ejected liquids
may result in physical impairment.
Before disconnecting this product from the piping system, make sure the line is depressurized.
Otherwise, the fluid inside will eject and may result in physical impairment.
When replacing parts, or when performing maintenance or inspection, turn off the switch, and
release the fluid inside the piping to depressurize the line. Otherwise, the fluid inside will eject and
may result in physical impairment.
DANGER unless these precautions are not obeyed!
Storage
For potentially long term storage, store the product in the places where the following environmental
conditions are satisfied.
・Being kept dry.
・Appropriate vibration or shock.
・Temperature of 5C to 60C and humidity of 5% to 80% RH (non-condensing).
・Places free from coarse particles.
・Places not exposed to direct sunshine.
In Case of Breakdown
Symptom Cause Countermeasure
No output value displayed
with a flow.
Output value displayed
without a flow.
Large errors in
measurement detected.
Incorrect wiring. Check the wiring diagram and correct the
Incompatible power , volt age. Check the power supply and voltage.
The tubing system is not filled
with the liquid.
The flow rate is outside the
measurable range.
The tubing system is not filled
with the liquid.
The liquid in tubes is
fluctuating due to large ripple.
Incompatible power, voltage. Check the power supply and voltage.
Incompatible load resistance. Use the load resistance of 500Ω or less.
There is noise-generating
equipment nearby.
There is flow-blocking
equipment nearest to IN side
of flowmeter.
Cavitations are generated. Keep the rated line pressure to prevent
There are bubbles contained
in the liquid.
There are foreign substances
caught by shedder body.
Notify your nearest sales office for problems not listed above.
70ZX416241E-11 13/14
wiring.
Fill the liquid inside the tubing system.
Check the measurable range and choose the
product.
Fill the liquid inside the tubing system.
Minimize the ripples by using dampers or similar
devices.
Move the noise-generating equipment from the
vicinity.
Change the mounting position of flowmeter .
(keep the rated straight-tube length as follows)
IN side : 7 times longer than the bore
diameter
OUT side : 5 times longer than the bore
diameter
cavitations.
Do tubing not to have mixed bubbles.
Remove the foreign substances.
70ZX416241E-11 14/14
Notes on Warranty
The warranty runs for one year after the day when Surpass Industry products are delivered from Surpass
factory in Japan. In case Surpass Industry should agree in writing that the defects in performance or
material were caused by faulty design or workmanship of Surpass Industry, replacement products will be
supplied free of charge. This warranty shall not be applied to any defects caused by misuse, alteration,
neglectful treatment, and neglect of our recommendations or instructions.
In addition, we are not be liable to any direct or consequential loss, damage, and personal injury due to an
unauthorized usage in combination with other products and an improper usage outside of the specifications.
Our product warranty shall be limited to replacement of product.
Replacement with expense to the purchaser shall be applied to the followings:
Any defective products caused by usage that is not described in the Instruction Manual.
Any defective products caused by neglectful treatment.
Any defective products caused by decomposition, alteration, and improper adjustment or repair.
Any defects of products caused by acts of God including natural disaster or fires.
Consumables and accessories.
Surpass Industry Co., Ltd.
2203 Shimooshi, Gyoda-shi, Saitama 361-0037 Japan
TEL: +81 48 554 9760 FAX: +81 48 554 9906
URL: http://www.surpassindustry.co.jp
C 2005-2015 Surpass Industry Co.,Ltd. All rights reserved.
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