Kofloc FML-500 User manual

MJ400252C1
Straight Type Ultrasonic Flow Meter
FML-500
Instruction Manual

MJ400252C1
- 1 -
Please read this manual thoroughly prior to installing and using the product.
This way it is possible to ensure the performance and safety of the product and
prevent possible accidents and damage to the product due to incorrect use.
When the product has failed or is considered to require readjustment, please
contact our sales office. Our experienced technical staff will give you appropriate
advice. Please follow the instructions given.
Please note that if you repair/modify the product yourself, not only serious
accidents may occur, but our warranty will become void.
The contents of the manual are subject to change without notice for
improvement. Prior to shipment, every care has been taken in preparing this
manual not to mention the product itself, but if you notice any imperfections,
errors or omission, please contact KOFLOC.
<< Prior to use >> and << Precautions for use >>
Various alert symbols and signal words are used in this manual and attached to the
product to ensure correct use of the product and to prevent possible personal injury
or loss of life and property damage. The symbols and meanings of the signal words
are as follows:
Ignoring this symbol and handling the product
incorrectly will immediately result in loss of life or
serious injury.
Ignoring this symbol and handling the product
incorrectly may result in loss of life or serious
injury.
Ignoring this symbol and handling the product
incorrectly may result in personal injury or damage
to property.
DANGER
WARNING
CAUTION

MJ400252C1
- 2 -
Table of Contents
1. Foreword 3
2. Precautions for Handling
2-1 Checking the ID plate 3
2-2 Precautions for transportation 3
2-3 Precautions for storage of the product 3
3. Overview 4
4. Specifications 5
5. Installation
5-1 Installation place 7
5-2 Installation method 7
5-3 Precautions for piping 7
6. How to Use
6-1 Warming up 9
6-2 Operating procedure 9
6-3 Description of the indicator 10
6-4 Zero adjustment 11
6-5 Flow rate indication 11
6-6 Re-measure mode 11
6-7 Auto AVR function 11
6-8 Parameter setting 12
7. Troubleshooting 16
8. Warranty 17

MJ400252C1
- 3 -
1. Foreword
Thank you for your selection of the ultrasonic flow meter Model FML-500. Prior to
using your new equipment, please read this manual thoroughly to ensure it is used
in the correct way.
2. Precautions for Handling
2-1 Checking the ID plate
All the products have been assembled and adjusted one by one according to the
specifications, and liquids to use, flow rates and other data are shown on the ID plate
attached to the back of the case. Check the ID plate and make sure your new
equipment meets these specifications.
Check items:
①Model
②Name of fluid
③Flow rate
④Presence of the serial No.
2-2 Precautions for transportation
Wherever possible, transport the product in the condition in which it has been received from
KOFLOC to the installation site in order to prevent damage due to accidents during transportation.
2-3 Precautions for storage of the product
If the product is not put in use for a long time after it was received, unexpected troubles may
occur. When it is expected that the product will be kept in storage for a long time, take the
following precautions:
1) Store the product in the package in which it was received from KOFLOC, wherever possible.
2) Store the product in a place described below:
①A place free of rain and water.
②A place free of vibration and impact.
③A place of normal temperature and normal humidity (around 25℃, 65%).
④A place free of dust.
⑤A place free of corrosive gases.
⑥A place free of a strong electric/magnetic field.
3) To store the product that has been used, purge with pure water, etc. so that measuring
liquid will not remain in the flow meter.
Cover the inlet and outlet of the meter with caps to prevent intrusion of dust and dirt.

MJ400252C1
- 4 -
3. Overview
Model FML-500 is a straight type ultrasonic flow meter for liquid.
The areas in contact with liquid are made of New PFA, which is highly resistant to chemicals,
and the passage is a simple straight construction having no obstacles inside to facilitate
maintenance.
The indicator-integrated meter becomes ready for measurement once its cables are connected. It
is capable of measuring flow rates up to F.S. 5 L/min. precisely.
⚫Clean structure with areas in contact with liquid made of New PFA.
⚫Straight type passage to cause no unnecessary pressure loss and facilitate maintenance.
⚫Small size and light weight. Compact
⚫Meter equipped with an indicator can be made ready for measurement only by connecting it to
a 24 VDC power supply.
⚫Capable of measuring highly viscous fluid.
Principle of operation
A flow velocity is calculated by a difference in time between the arrival time of ultrasonic
vibrations sent in the direction of flow of fluid and the arrival time of ultrasonic vibrations sent
in the opposite direction of flow of fluid and then a flow rate of fluid is calculated by multiplying
the cross sectional area of the tube used by the flow velocity.

MJ400252C1
- 5 -
4. Specifications
Standard specifications
Measuring fluids
Water, pure water (bubbles not included) *For other
liquids, please contact us.
Fluid sonic range
1300 m/s －1600 m/s
Fluid temperature range
15 －50℃
Measuring range
0 －5 L/min
Measuring accuracy
See Table 1.
Materials of parts in
contact with liquid
New PFA
Pressure resistance
0.5 MPa（at 20℃）
Process connection
6-mm tube end
Cable length
3 m
Cable sheath
PVC
Enclosure
Equivalent to IP64
Ambient temperature
5 －50℃（No condensation）
Ambient humidity
10 －85%RH max. (No condensation)
Installation
Vertical, horizontal, inclined
Table 1: Measuring accuracy (water 23℃)
Measuring range
0 －5 L/min
Flow range
0 –0.20 L/min －0 –5.00 L/min
Measuring
accuracy
Flow
velocity
Below 1 m/s (below 0.8 L/min）
±30 mL/min
1 －2 m/s（0.8 －1.5 L/min）
±2.5%F.S
2 －3 m/s（1.5 －2.2 L/min）
±2.0%F.S
3 －6.6 m/s（2.3 －5 L/min）
±1.5%F.S
Electrical specifications
Measuring method
Ultrasonic wave propagation time difference calculation
Output
Flow output
4 –20 mA（Load resistance 500 Ωmax.）
Flow alarm
output
Open collector output 2 points
Load rating: 30 VDC, 20 mA, operation: comparison
Indicator
4-digit, 7-segment LEDs
Indication
Instantaneous flow rate, integrated flow rate
Alarm output monitor
LED 2-point indication (Instantaneous flow rate alarm,
integrated flow rate alarm)
Parameter setting
Four key switches on the panel
Power supply
24 VDC±5%
Power consumption
150 mA max.

MJ400252C1
- 6 -
External dimensions
Signal table
Pin No.
Signal Name
Core Color
1
Power supply +24V
Red
2
Power supply/current
output COM
Black
3
Current output
White
4
Alarm output 1
Green
5
Alarm output 2
Yellow
6
Alarm COM
Brown

MJ400252C1
- 7 -
5. Installation
5-1 Installation place
①This equipment is designed for indoor use.
Never install the equipment in a place where it is likely to be wetted by water or rain. The
equipment may fail. Install the equipment in a place where sufficient ventilation is provided
and changes in temperature and humidity are minimal.
②Install the equipment in a place free of vibration and impact.
③Do not use the equipment under direct sunlight or at high temperature/humidity.
④Install the equipment in a place free of dust.
⑤Install the equipment in a place free of corrosive gases.
⑥Install the equipment in a place free of a strong electric/magnetic field.
⑦After installation, be sure to conduct leak test on piping.
⑧Install the equipment in a place where the operating temperature is 15 to 35℃.
The use of the equipment in a condition deviating from the conditions described in the
specifications is a cause of failure.
5-2 Installation method
Install the meter using the threaded holes (M3) on the bottom of the body.
Bottom of body
5-3 Precautions for piping
①The measuring tube must be filled with measuring fluid.
②Avoid such piping as fluid flows downward.
Bubbles in the measuring tube are a cause of deterioration of the accuracy.
③Be sure that the length of piping in the upstream is longer than 10D and the length of piping
in the downstream longer than 5D.
④Be sure that the flow direction matches the arrow shown on the body.
⑤When a flow rate adjust valve is to be installed, it is recommended that it be installed on the
secondary side of the meter.
If it is installed in the upstream, bubbles may be produced due to pressure drop to cause
deterioration of the accuracy.
⑥For connecting tube joints, follow the procedures furnished by the manufacturer.
During connection, hold the tubes to prevent breakage.

MJ400252C1
- 8 -
When washing the inside of piping of the product, exercise caution not to
damage the inside. If it is damaged, the accuracy will deteriorate.
Check to see if the connections of piping are not leaking. If such a
check is omitted and unsafe liquid is used, serious accidents may occur.
CAUTION
WARNING

MJ400252C1
- 9 -
6. How to Use
6-1 Warming up
Warm up the equipment for at least 15 minutes after it was powered on.
6-2 Operating procedure
・Operation panel
・Indicator
Indicates an instantaneous flow rate or integrated flow rate.
During setting, the mode No. or set value is shown here.
・Alarm lamps
When the alarm output 1 is on, “AL1”lights and when the alarm output 2 is on, “AL2”lights.
・Indicator lamps
When an instantaneous flow rate is being indicated, “IF”lights and when an integrated flow
rate is being indicated, “TF”lights.
・Shift key [＜]
Measurement: Switches over the indication of flow rates between the instantaneous flow rate
and the integrated flow rate.
Setting: Moves the flashing digit to left.
Returns to the flow rate indication when the mode No. is being indicated.
・Up key [∧]
Measurement: Not used.
Setting: Increments the value of the flashing digit.
・Down key [∨]
Measurement: Not used.
Setting: Decrements the value of the flashing digit.
・ENT key
Measurement: Not used.
Setting: Accepts an entered value.
ENT key
Up key
Shift key
Indicator
Down key
Alarm
lamps
Indicator
lamps

MJ400252C1
- 10 -
6-3 Description of the indicator
Shown in Manual
Status
Shown on Indicator
AUTO
Auto zero selected
Flashing
‐‐‐A
Auto zero being executed
Flashing
Character
move
SUM
Integrated flow rate reset
selected
Flashing
WIN1
Re-measure mode selected
Flashing
‐‐‐W
Re-measurement being
executed
Flashing
Character
move
AVR0
Auto AVR selected
Flashing
AVR1
Auto AVR selected
(Factory-set value)
Flashing
‐‐‐R
Auto AVR being executed
Flashing
Character
move
YES
Flow rate set value update
selected after parameter set
mode P-02 has been run
Flashing
NO
Flow rate set value cancel
selected after parameter set
mode P-02 has been run
Flashing

MJ400252C1
- 11 -
6-4 Zero adjustment (Zero offset)
With the piping filled with water fully and an instantaneous flow rate being indicated, stop
the flow of liquid completely. In this state, press and hold the down key [∨] and [ENT] key
for approx. 3 seconds. Then the indicator will show AUTO. Next, pressing the [ENT] key
once executes the zero adjustment. While it is being executed, ‐‐‐A is shown and when
the zero adjustment has been completed, the instantaneous flow rate will be indicated
again. (If flickering of a figure near 0 is annoying, select the low cut function.)
Pressing the shift key [＜] while AUTO is being shown on the indicator cancels the zero
adjust function and the instantaneous flow rate will be indicated again.
6-5 Flow rate indication
①Switching over flow rates to indicate
Each time the shift key [＜] on the operation panel is pressed, indication is switched over in
the order of instantaneous flow rate →integrated flow rate (lower 4 digits) →integrated flow
rate (upper 4 digits). The upper four digits are not indicated, however, when the integrated flow
rate value does not reach upper four digits. When an instantaneous flow rate is being indicated,
the “IF”lamp lights and when an integrated flow rate is being indicated, the “TF”lamp lights.
②Units of flow rates
The units of the instantaneous flow rate and integrated flow rate are the units set in each
setting mode.
③Integrated flow rate resetting
In the state of integrated flow rate indication, press and hold the up key [∧] and down key
[∨] for approx. 3 seconds. Then the indicator will show SUM . Next, pressing the [ENT] key
once resets the integrated flow rate value. Pressing the shift key [＜] while SUM is being
indicated cancels resetting.
6-6 Re-measure mode
Use this function when measurement has been performed while the piping was not full of
water or when the conditions or types of liquid change.
In the state of integrated flow rate indication, press and hold the up key [∧] and [ENT]
key for approx. 3 seconds. Then the indicator will show WIN1 . Next, pressing the [ENT] key
once runs measurement again. Pressing the shift key [＜] while WIN1 is being indicated cancels
this mode.
6-7 Auto AVR function
Try this function if the indicator does not change from ‐‐‐W to flow rate indication
when the piping is full of water.
When the shift key [＜] is pressed, ‐‐‐W on the indicator will be canceled. In this state,
press and hold the up key [∧] and shift key [＜] for approx. 3 seconds. Then the auto AVR
mode will be activated and the indicator will show AVR0. Pressing either the up key [∧] or
down key [∨] causes the indicator to change to AVR1.
When the [ENT] key is pressed while AVR0 is being shown on the indicator, the auto AVR
function will be executed and ‐‐‐R will be shown. After ‐‐‐R has been canceled, run
the re-measure mode.
Pressing the [ENT] key while AVR1 is being shown sets the factory setting again. (Auto
AVR cancel)

MJ400252C1
- 12 -
6-8 Parameter setting
When an instantaneous flow rate/integrated flow rate is being indicated, pressing and holding
the shift key [＜] and [ENT] key for approx. 3 seconds sets the parameter setting mode. Each
time the up key [∧] or down key[∨] is pressed, the mode No. changes. To change the set value,
change the digits with the shift key [＜] and change the figures with the up key [∧] or down key
[∨].
After setting a parameter, pressing the [ENT] key registers the set value and returns the mode
to the mode No. indication mode. Pressing the shift key [＜] while the mode No. is being
indicated returns the indication to either the instantaneous flow rate or integrated flow rate.
①Default values
Mode No.
Default Value
Set Item
ABCD
A
B
C
D
P－01
1.
0
Damping constant setting
P－02
3
Unit of flow rate setting
0
5.
0
0
Full scale flow rate setting
P－03
Factory-set value
K factor value setting
P－04
0
0
Low flow rate cut setting
P－05
0
1.
0
Liquid viscosity setting
P－06
0.
0
J value (temperature coefficient) setting
P－07
1.
0
0
Liquid density setting
P－08
0
1.
0
0
Liquid kinematic viscosity coefficient setting
P－09
0
5.
0
0
Upper limit flow rate alarm setting
P－10
0.
0
0
Lower limit flow rate alarm setting
P－11
3
Unit of integrated flow rate setting
P－12
0
5
Integrated flow rate (lowest region cut) setting
P－13
1
Alarm output 1 type assignment setting
P－14
2
Alarm output 2 type assignment setting
P－15
0
0.
0
0
Integrated flow rate alarm setting
P－16
0
0
1
Equipment address setting

MJ400252C1
- 13 -
Description of mode No. and set values
Mode No.
Damping constant setting
P－01
ABCD
1. 0
Set range: 0.0 －25.0 s
Mode No.
Unit of flow rate setting and full scale flow rate setting
P－02
Unit of flow rate setting
ABCD
3
1・・・mL/s
2・・・mL/min
3・・・L/min
4・・・L/h
Full scale flow rate setting
ABCD
05. 00
Input range: mL/s・・・3.14 －99.99
mL/min・・・188 －9999
L/min・・・0.18 －11.30
L/h・・・11 －678
※After a full scale flow rate has been set, when YES is selected with the up key
[∧], the value will be registered. If NO is selected, the value will not be
changed and the indicator will return to mode No. indication.
Mode No.
K factor value setting
P－03
ABCD
1. 000
Set range: ：0.500 －5.000
Mode No.
Low flow rate cut setting
P－04
ABCD
0 0
Set range: 0 －20%

MJ400252C1
- 14 -
Mode No.
Liquid viscosity setting
P－05
ABCD
0 1. 0
Set range: 0.0 －99.9 cP
Mode No.
J value (temperature coefficient) setting
P－06
ABCD
0. 0
Set range: －9.9 －9.9
Mode No.
Liquid density setting
P－07
ABCD
1. 00
Set range: 0.00 －9.99 g/cm3
Mode No.
Liquid kinematic viscosity coefficient setting
P－08
ABCD
01. 00
Set range: 0.00 －99.99 cSt
Mode No.
Upper limit flow rate alarm setting
P－09
ABCD
05. 00
Set range: Up to 2 times the full scale flow rate value
Mode No.
Lower limit flow rate alarm setting
P－10
ABCD
0 0 00
Set range: 0 up to full scale flow rate value
Mode No.
Unit of integrated flow rate setting
P－11
ABCD
2
1・・・mL
2・・・L

MJ400252C1
- 15 -
Mode No.
Integrated flow rate (lowest region cut) setting
P－12
ABCD
0 5
Set range: 0 －10
Mode No.
Alarm output 1 type assignment setting
P－13
ABCD
1
0・・・No alarm output
1・・・Instantaneous flow rate (upper limit) alarm
2・・・Instantaneous flow rate (lower limit) alarm
3・・・Instantaneous flow rate (upper/lower limit) alarm
4・・・Integrated flow rate alarm
5・・・No received wave alarm
Mode No.
Alarm output 2 type assignment setting
P－14
ABCD
2
0・・・No alarm output
1・・・Instantaneous flow rate (upper limit) alarm
2・・・Instantaneous flow rate (lower limit) alarm
3・・・Instantaneous flow rate (upper/lower limit) alarm
4・・・Integrated flow rate alarm
5・・・No received wave alarm
Mode No.
Integrated flow rate alarm setting
P－15
ABCD
0000
Set range: mL・・・0 －99999999
L・・・0 －999999.99
Mode No.
Equipment address setting
P－16
ABCD
0 01
Set range: 1 －127

MJ400252C1
- 16 -
7. Troubleshooting
Symptom
Probable Cause
Check Item and Corrective Action
1. The indicator shows
nothing.
a. The power is not on.
1. Check to see if the power has been turned on.
2. Check to see if wires have been connected correctly.
2. The indication does
not change from ‐‐‐
W to flow rate.
a. The piping is not full of water.
1. Fill the piping with measuring liquid fully.
b. The liquid may be out of the
specification range.
1. Check liquid specifications such as temperature of
measuring liquid.
2. Try the auto AVR function.
If the indication does not change to flow rate when the
auto AVR function is executed, it is possible that the
liquid in question is unmeasurable liquid. Please
contact us.
3. The indicated value is
not stable.
a. The piping is not full of water.
1. Fill the piping with measuring liquid fully.
2. Check the piping installation direction. It is
recommended that the equipment be installed in such
a direction that liquid flows upward in order to
prevent trapping of air bubbles.
b. Measuring liquid contains bubbles
or foreign matter.
1. Eliminate bubbles and foreign matter as much as
possible by, for example, installing a deaerator in the
upstream.
c. The flow pulsates.
1. If responsiveness is not affected, increase the damping
constant.
d. Measuring liquid is not uniform.
1. Keep entire liquid in the uniform state by, for example,
stirring it fully.
Symptom
Probable Cause
Check Item and Corrective Action
4. The indicated flow rate
does not match the
actual flow rate.
a. The piping line is leaking.
1. Retighten the leaking places due to a failure to tighten
the nuts or insufficient tightening of the nuts of the
piping line to prevent leak.
b. The zero point is not correct.
1. Conduct the zero adjustment.
c. The meter is used in a way
deviating from the specification.
1. Refer to the specification label attached to the meter.
d. Measuring liquid contains
bubbles or foreign matter.
1. Eliminate bubbles and foreign matter as much as
possible by, for example, installing a deaerator in the
upstream.
＊If the problem cannot be solved by the above corrective actions, please contact the dealer.

MJ400252C1
- 17 -
8. Product warranty
Thank you very much for usually using Kofloc products regularly.
Now, when ordering our products by this catalog and when there is no statement of special
mention matters, such as estimate, contract and specifications, we apply following
requirements and the following contents of a warranty.
1. The contents of warranty
①Warranty period
The warrant period shall be one year after the shipment.
②Warranty range
If a malfunction of the product you purchased occurs because of our responsible reasons,
offer of substitute or it will be charge-free repaired in our factory. But if a malfunction
of the machine occurs due to the following reasons, even within the warrant period, it
becomes the outside for a warranty.
(a) Malfunctions due to erroneous applications, repairs or remodeling.
(Including the case in which the manufacturing specification differs from the
application conditions.)
(b) Malfunctions due to the falling after the purchase.
(c) Malfunctions caused by natural disasters such as fire, earthquake, water disaster
and lightning stoke, or riots or wars.
(d) Malfunctions caused by mixing-in of foreign matters out of the piping.
(e) Malfunctions caused by the peculiar problems due to combinations with other built
in equipment.
In addition, a warranty here means the warranty of the product simple substance of
our company.
So the damage induced by failure of the products of our company shall be eliminated
from the object of warranty.

MJ400252C1
- 18 -
URL：http://www.kofloc.co.jp