Surpass ESL-6-2.5 User manual

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.
Cautionary notes in this manual must be
fully understood and complied with at all
times.
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.
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.
Specific Warnings
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.
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
This symbol indicates warnings against impending danger
which, if not observed, may cause death or severe injury to
the user.
DANGER
This symbol indicates warnings which, if not observed, may
physically impair the user or damage surrounding objects.
CAUTION
This symbol indicates warnings which, if not observed, may
cause death or severe injury to the user.
WARNING
Provides important notices and instructions for correct operation
of the product.

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.
Operating Principle of Eddysonic Flowmeter
RX
Ultrasonic Waves
Housing
Karman Vortex
Shedder Body

70ZX416241E-11 4/14
<Circuit Block Diagram>
Circuit Block Diagram
RX
TX
Pulse Output
Analog Output
Waveform
Shaping
Phase
Com
p
arator Filter/Amplifier Comparator CPU
Oscillator

70ZX416241E-11 5/14
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) 0.4 ~ 2.5 L/min
(at 1x10-6 m2/s) 0.5 ~ 3.5 L/min (at 1x10-6 m2/s) 0.5 ~7 L/min (at 1x10-6 m2/s) 1 ~ 16 L/min (at 1x10-6 m2/s)
Measurement Accuracy
(※2) ±2%F.S. ±5%F.S. ±2%F.S.
Environment Humidity 5 ~ 80 %RH(Non-condensing)
Environment Temperature 5 ~ 60C
(41 ~ 140F) 15 ~ 50C (59 ~ 122F) 5 ~ 60C (41 ~ 140F)
Fluid Temperature 5 ~ 85C
(41 ~ 185F) 15 ~ 50C (59 ~ 122F) 5 ~ 85C (41 ~ 185F)
Fluid Pressure
(※3) Max. 800 kPa (at 25C)
Max. 116 psig (at 77F)
Connecting Tube Diameter φ1/4”xφ5/32”
(φ6.35xφ3.96) φ3/8”xφ1/4” (φ9.53xφ6.35) φ1/2”xφ3/8” (φ12.7xφ9.53)
Wetted Parts PFA
Mounting Position Horizontal, vertical, or diagonal
Analog
Output
Output DC 4 ~ 20 mA
Response time Appox. 2 seconds
Load Resistance 500 Ωor less
Pulse
Output
Output NPN open collector
Excitation
Voltage/Current Max. DC 30 V / 80 mA
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”)
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.

70ZX416241E-11 6/14
※1 Instructions on range of flow rate
Kinetic viscosity of liquids
[x 10-6 m2/s] 1 2 3 4 5 6 7
Maximum flow
rate [L/min]
ESL-6-2.5 Minimum flow rate
of liquids [L/min] 0.4 0.8 1.2 1.6 2.0 2.4 - 2.5
ESL-10 Minimum flow rate
of liquids [L/min] 0.5 1.0 1.5 2.0 2.5 3.0 - 3.5
ESL-10-7 Minimum flow rate
of liquids [L/min] 0.5 1.0 1.5 2.0 2.5 3.0 3.5 7.0
ESL-15 Minimum flow rate
of liquids [L/min] 1.0 2.0 3.0 4.0 5.0 6.0 7.0 16.0
◎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.
※2 Instructions on measurement accuracy
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:Outputofflowmeter(mA)
a:Coefficient
※3 Instructions on operating liquid pressure
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:Liquidtemperature(C) at your usage
Model a : Coefficient
ESL-6-2.5 0.15625
ESL-10 0.21875
ESL-10-7 0.4375
ESL-15 1

70ZX416241E-11 7/14
Outer Dimensions
Flow direction indicator
Base
Cable
ｗｗｗ．ｓｕｒｐａｓｓｉｎｄｕｓｔｒｙ．ｃｏ．ｊｐ
ＭＡＤＥ ＩＮ Ｊ ＡＰＡ Ｎ
ＳＵＲＰＡＳＳ ＩＮＤＵＳＴＲＹ Ｃ Ｏ．，ＬＴＤ．
ＥＤＤＹＳＯＮＩＣ ＦＬＯＷＭＥＴＥＲ
ＥＳＬ－１０

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 issued
by the connector manufacturer.
●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.
●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 must be at least 5 times longer than the bore
diameter.
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 personal 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.
WARNING
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.
CAUTION
We recommend the vertical tubing system. To prevent gas-liquid two-phase
flows, design the tubing system in which the measured liquids flow to the
upward direction (bottom-top).
Liquid filled
Flowing upward
ｗｗｗ．ｓｕｒｐａｓｓｉｎｄｕｓｔｒｙ．ｃｏ．ｊｐ
ＭＡＤＥ ＩＮ ＪＡＰＡＮ ＳＵＲＰＡＳＳ ＩＮ ＤＵＳＴＲＹ ＣＯ．，ＬＴＤ．
ＥＤＤＹＳＯＮＩＣ ＦＬＯＷＭＥＴＥＲ
ＥＳＬ－１０

70ZX416241E-11 9/14
<Pressure at Downstream Side>
To prevent the occurrence of cavitations(※4), the pressure value at the downstream side should be more
than one obtained from the following formula.
Pd=2.7⊿P+1.3P0
Pd:Pressurevaluesatthedownstreamside[kPa]
⊿P: Pressure loss values [kPa]
P
0: Vapor pressure values of liquids [kPa abs]
< Pressure Loss >
※4 Cavitations
Phenomenon that the liquid evaporates, generating air bubbles, when the liquid pressure drops to the
saturated vapor pressure or below.
0.1 1 10 30
Flow Rate [L/min]
200
100
10
1
Pressure Loss⊿P[kPa]
ESL-15
ESL-10
ESL-6-2.5

70ZX416241E-11 10/14
Points to Observe When Installing
To prevent erroneous operation or premature wear, do not install in:
●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 of high
temperature Areas where corrosive
or explosive gases are
being ejected
Areas of excessive
vibration
Areas of excessive
noise Areas that may be
struck by lightning
A
reas that may be
submerged in water or
where subject to
splashing liquids
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 500Ωor 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 1kΩ1W
10kΩ1/4W
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.
C
A
UTION
Wiring diagram
Shielding
F.G
Black
Yellow
Blue
White
Red
Main circuit
Recorder
Integrating
flowmeter
(
Counter
)
DC 24 V
Power supply
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

70ZX416241E-11 12/14
<Relationship of Flow and Analog Output>
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>
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 5C to 60C and humidity of 5% to 80% RH (non-condensing).
・Places free from coarse particles.
・Places not exposed to direct sunshine.
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!
Flow [L/min]
22
4
Current Output
20
[mA]
0
(1) Overflow
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

70ZX416241E-11 13/14
In Case of Breakdown
Symptom Cause Countermeasure
No output value displayed
with a flow. Incorrect wiring. Check the wiring diagram and correct the wiring.
Incompatible power, voltage. Check the power supply and voltage.
The tubing system is not filled
with the liquid. Fill the liquid inside the tubing system.
The flow rate is outside the
measurable range. Check the measurable range and choose the product.
Output value displayed
without a flow. The tubing system is not filled with the liquid. Fill the liquid inside the tubing system.
The liquid in tubes is
fluctuating due to large ripple. Minimize the ripples by using dampers or similar devices.
Large errors in
measurement detected. Incompatible power, voltage. Check the power supply and voltage.
Incompatible load resistance. Use the load resistance of 500Ωor less.
There is noise-generating
equipment nearby. Move the noise-generating equipment from the vicinity.
There is flow-blocking
equipment nearest to IN side
of flowmeter.
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 are generated. Keep the rated line pressure to prevent
cavitations.
There are bubbles contained
in the liquid. Do tubing not to have mixed bubbles.
There are foreign substances
caught by shedder body. Remove the foreign substances.
Notify your nearest sales office for problems not listed above.

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: [phone] FAX: [phone]
URL: http://www.surpassindustry.co.jp
C 2005-2015 Surpass Industry Co.,Ltd. All rights reserved.