FW9000NN Series
SERVO BALANCE-TYPE LEVEL GAUGEOUTLINE
FW9000NN Series is the successor to the well received and widelyused FW-9000 series for its reliability and variety of long term
application.
Using the most of reliable, durable and highly accurate mechanismof FW-9000, FW9000NN has become more reliable and user-friendly by introducing up-dated electronics etc (SIL2 compatible).
Consequently, FW9000NN has the interchangeability with the current FW-9000 series in terms of installation methods and interfaces
with other equipment.
Its noise resistivity and lightening protection performance have been
improved significantly.
The intensified automatic self-diagnosis and self-adjustment functions have made FW9000NN more user friendly.
Including ATEX certified version intended for use in potentially explosive atmosphere FW9000NN is ready to serve world-wide users.

APPLICATIONS❑ For bonded tanks❑ For LPG, LNG, Petroleum, Fuels, Water supply and Sewage systems, Chemicals, Power Plants, Food and Beverages.
❑ For versatile applications such as various kinds of liquid measurement, 2-liquids interface, a-point-measurement of liquid density,
multi-points measurement of liquid density for profile presentation.

FEATURES❑ Can be connected to the existing spot type and multipoint averaging temperature sensors.

Those items marked as ■ are added or improved features from existing models.

❑ Precision stepping motor control with micro processor has realized amagingly accurate measurement.

■ For bonded tanks
The increased noise resistivity and lightening protection assure
you reliable operation as complying with superb level 4 or more
stipulated in IEC61000-4,5.
Protection from direct lightning (Option)❑ Highly reliable operation with powerful self-diagnosis functions(SIL2).

■ Having the same dimensions and materials as existing models,
FW9000NN is compatible to Japanese explosion-proof requirements and is interchangeable with existing FW-9000 to makereplacement easy.

❑ In has addition to the high-speed serial data communication,
FW9000NN have various communication tools which are compatible to TOKYO KEISO's existing well-established transmitters.
Therefore, FW-9000NN serves with ease for your renovation andreplacement of the existing tank monitoring system.

■ Parameters can be set without opening housing with 4 magnet
sensors attached to the indicating windows.

❑ High durability with non-contact type balancer without using slip
ring.

■ Compatible with wide range of power supply from 100 to 240
VAC, 50/60Hz.

❑ In combination with DIR110NN series, Max. 6 contact signals
transmitted between field and control room. Monitoring and control of equipments around the tank yard are also possible in addition to liquid level measurement.

■ Standardized 2 sizes of measuring drums cover wide measuring
ranges from small to gigantic tanks.

❑ 4 to 20 mA signals such as pressure signal can be digitalized andretransmitted.

❑ Complying with RoHS requirements.
❑ Eco-friendly low power consumption as small as Max. 25VA.
❑ Covers high design pressure up to 3.0 MPa.
❑ Electronic circuits are installed in the electric compartment whichis completely isolated from drum compartment.

❑ Analog 4 to 20mA signals such as level and temperature can be
output additionally to meet with high speed data processing carried by host computers.

TG-L1021-E02
3rd edition Apr 2020 K
1st edition Nov 2014 K

FW9000NN Series Servo Balance-type Level Gauge

MODEL CODE
FW9NN
WIRE DRUM SIZE

MEASURING RANGE

1

400mm

1

0 to 5m

2

800mm

2

0 to 10m

9

SPECIAL3

0 to 15m

4

0 to 18m

PRESSURE RATING

5

0 to 25m

1

ATOMOSPHERIC

6

0 to 30m

2

0 to 1MPa

7

0 to 40m

30 to 2MPa8

0 to 60m

40 to 3MPa

9

SPECIAL

9

SPECIAL

ENCLOSURE
W

WEATHER PROOF

E

FLAME PROOF

OPERATING PRINCIPLE
A very thin measuring wire B is wound onto measuring drum C hav-

In FW9000NN, signal from Balancer G is fully digitalized. Steppinging 400 mm/r or 800 mm/r precisely machined spiral groove.

motor N, having high resolution, is controlled by Microprocessor
unit H. This digitalized servo operation system offers high liquid

Measuring drum C is connected to Driving shaft F through mag-following capability and stability in operation compared to existing

net coupling D, E and rotates forward and backward according toanalog control method.

movement of gear-down unit J, K and stepping motor N. A worm
gear J, which is located on the same axis as Driving shaft F, is con-

The angle of Measuring drum rotation is obtained from the number

nected to Driving shaft F through Spring I.

of steps of Stepping Motor N. This remarkably improves the resolution of liquid level measurement of 0.025 mm.

By this arrangement, tension onto Measuring wire B can be precisely detected by measuring distortion of Spring I by Balancer G. A
Displacer A, of which density is higher than that of liquid to be measured, is connected to one end of Measuring wire B. The weight of
Displacer A always gives downforce tension to Driving shaft F. In
normal measurement condition, Stepping motor N is controlled bysignal from Balancer G to give Measuring wire B a slightly less andconstant tension than the welght of Displacer A. In this way, Displacer A always follows liquid surface with stable draft line.
Thus, rotating angle of Measuring drum C which corresponds tolength of unwound Measuring wire B represents height of liquid intank.
By adjusting the control level of tension T onto measuring wire B,
interface of two liquids having different density can also be measured. Also, by sinking displacer into liquid and measuring the tension T onto measuring wire B, the liquid density can be detected
and measured.

2

TOKYO KEISO CO., LTD.

TG-L1021-E02

FW9000NN Series Servo Balance-type Level Gauge

STANDARD SPECIFICATION
Mechanical specification● Liquid level detection : Digitally controlled balancing servo consisting of small size displacer, measuring● Accuracy✽ (Indication and digital output) :1) Liquid level measurement±0.4mm (Refer to factory for ditail)wire and wire drum
● Displacer2) Interface measurement: Dia. ø140, ø110, ø90, ø70, ø50, ø30

in case of density difference of 0.2 g/cm3

Mass 250g (Standard)± (2.7) mm

Material SUS304, SUS316, SUS316L,

3) Density measurement✽

MA (Equiv. to Hastelloy ), PTFE, others● Measuring wire

: Standard

SUS316 (ø0.2, single)± 0.005g/cm3✽

Option ✽1 MA (Equiv. to Hastelloy)

Under reference conditions.

● Process connection : Flange
Flange size3", 4", 5", 6"or other specials(ø0.3, single)
FEP covered(Horizontal movement of displacer for tank(ø0.6, stranded core)✽height shall be considered for decision of

1 Small type wire drum may be unable to beflange size)used in case of measuring wires other thanstandard (ø0.2) even in short measuring
Flange rating

range. Consult factory for details.

JIS5K/10K/20K/30KRF,
ANSI 150/300,● Wire drum size

JPI

: 400 mm/r (FW9첸1첸NN첸)
800 mm/r (FW9첸2첸NN첸)● Tension detection: By using perfect Non-contact magnetic● Driving motor● Drive shaft sealing: High resolution type stepping motor● Displacer guiding

150/300, Others: Standard: By stand pipe

Option: Non guide ✽4

field response type Hall element sensor

By guide wire ✽4
Special ✽4: Strong magnet coupling✽

4 : Specified accuracy not applicable. Consult● Measuring range(FW91첸첸NN첸)

✽

0~10m

(FW92첸첸NN첸)

✽

0~15m

(FW93첸첸NN첸)

✽

0~18m

(FW94첸첸NN첸)

✽

0~25m

(FW95첸첸NN첸)✽(FW96첸첸NN첸)

✽

0~40m

(FW97첸첸NN첸)

✽

0~60m

(FW98첸첸NN첸)✽(FW99첸첸NN첸)

✽

0~5m

0~30m

Special✽✽factory for further details.

2
2
2
2
2
2

● Displacer horizontal movement :For small size drum(400 mm/r, FW9첸1첸NN첸)for 1 m liquid level movement

33

Δa= 2.5mm, 1.9mm, 1.4mm,

Δa1.125mm

3

2 Small size drum (400 mm/r, FW9첸1첸NN첸)o r l a r g e s i z e d r u m ( 8 0 0 m m / r,

For large size drumFW9첸2첸NN첸) is applicable.

(800 mm/r, FW9첸2첸NN첸)

3 Large size drum (800 mm/r, FW9첸2첸NN첸)for 1 m liquid level movement

is applicable.
● Temp. range: Liquid-200 to +300˚C

Ambient-40 (-20 to + 55˚C TIIS)

Δa= 1.25mm, 0.95mm, 0.7mm,
0.57mm(Temperature of main body)
Under the conditions where, the liquid andthe moisture inside the wire drum room

● Construction

Flameproof ExdIICT6 (FW9첸첸첸NNE)

shall not freeze over, nor adhere.
✽

Not suitable for the use environment where
the mass of displacer changes by the attachment of liquid.

● Operating pressure

Prees.
Low press.
High press.

✽: Weather proof (FW9첸첸첸NNW) or(TIIS certification No. TC14583)● Protection class● Functional Safety: IEC60529 (JIS C0920) IP66/67: SIL2 (IEC 61508):

Op. press.
(MPa)

MODEL

Material ofpressurized partATM

FW9첸첸1NN첸 AC2A, SCS13, SCS14

0~1

FW9첸첸2NN첸

SCS13, SCS14

0~2

FW9첸첸3NN첸

SCS13, SCS14

0~3

FW9첸첸4NN첸

SCS13, SCS14

Hastelloy: Trade mark of Haynes International Inc.

TG-L1021-E02

TOKYO KEISO CO., LTD.

3

FW9000NN Series Servo Balance-type Level Gauge

ELECTRONICS AND SOFTWARE SPECIFICATION● Signal
1) External input
Besides normal level measurement by FW9000NN, the following external devices can be connected to FW9000NN. Data
from such external instruments are digitalized and transferred
to control room through serial data signal:a. Temperature sensors(Temperature conversion range :-200 to +320˚C)1) Pt100Ω spot temp. sensor (TS type of Tokyo Keiso or
equivalent)2) Average temp. sensor (ATM type of Tokyo Keiso or
equivalent)3) Multi-spot average temp, sensor (ATS type of Tokyo
Keiso or equivalent)b. Analog signal
4 to 20mA, 1 point (Input resistance 250Ω)2) External output:
a. Serial communication signal for receiver in for remote control room, Refer to ◆ COMMUNICATION FUNCTION for
further details.)
b. Serial data coded output for explosion-proof tank side receiver (Electric)c. Contact output
Number of contacts : 2
Configuration: SPST(1a or 1b)d. Analog output
4 to 20 mADC ⫻2 (Level and Temperature)
conversion accuracy ± 0.5% F.S.
HART (Ver.7) available for either one channel.
:● Alarm monitoring
2 Points of liquid level alarms or temperature alarms
Max.6 points when tank side indicator (DIR110NN series) is used.
When input signals exceed set points :1) Specified alarm message is indicated on LCD.
2) Specified bit of serial output is “ON".
3) Assigned open collector output is actuated.

● Indication part
Arrow
LCD

● Details of LCD presentation

・Operation mode
Level indication part (7 digits)

1 2 3 4 5 . 6 mm
12312345
Status indication (3 digits)(Error motor control sateof displacer)・Parameter mode

● Control and parameter setting :All parameters can be set by the following procedures:
1) Dialogue type setting with magnetic sensor on indicatorusing Arrow mark.
The registered password allows parameter settings for security reason.
(Control and parameter setting are possible without opening housing cover with power "ON".)
2) Parameters are presettable through 2-way data communication from remote control room.
3) Dialogue type setting by tank side indicator (DIR-110N)● Contents of control :Liquid level, liquid interface, density. hoisting, lowering , stoppage
etc of float:● Contents of parameter setting
Hoisting (Maximum, Minimum), Adjustment of level indication,
Displacer response PID, Alarm set point / Reset span / Alarm action / Relay allotment (Level, Temperature), Connection thermometer classification, Point changing of temperature element, Typeof external input, etc.

Data indication (7 digits)

0 0 0 0 0 5 0 mm
H 00300
Register indication
Code indication (5 digits)(hold, input, adjustment) (hold, input, adjusted data)● Cable entry

41Motor error

2

Under tension

3

Over tension

4

Balancer signal not in order

5

Repeatability error

6Burn-out of temperature wire

7

Temperature scale over

8

Displacer control error

9

4 to 20 mA scale overA

Non-volatile memory error

B

Sensor communication errorC

Density measurement error

E

Slit sensor error

GInternal error

G(=PF) or NPT female
available as option)

Size

Diagnosis

TOKYO KEISO CO., LTD.

: Standard(Flameproof cable glands● Self-diagnostis function
Error status
Indication of
status LCD

Data indication (5 digits)(Temperature etc.)

3 ⫻ 3/4 inch + 1 ⫻ 1inch● Cabie termination: Plug type terminal connection● Power supply: 100 to 240 VAC, 50/60Hz● Power consumption : Max. 25VA
● Arrester: Provided as standard

TG-L1021-E02

FW9000NN Series Servo Balance-type Level Gauge

DIMENSION AND MASS
Small size drum, Low pressure type

 G1

3-G3/4

180

（405）

(300)

(300)

Small size drum, High pressure type

(170)

G1

（MAX. 401）

MAX. 175.5(300)

3-G3/4(300)

Large size drum, High pressure type

(180)

MAX. 270（MAX. 509）

MAX. 330

G1

3-G3/4

 (360)

TG-L1021-E02

No.

Description

1

Wire drum compartment

2

Drum compartment cover

3
4

(330)

Wire drum size

Wire drum
compartment
material

Small

Large

Electric compartment

AC2A

16kg

—

Electric compartment cover

SCS13/14

35kg

90kg

5

Terminal box

6

Terminal box cover

TOKYO KEISO CO., LTD.

5

FW9000NN Series Servo Balance-type Level Gauge

INSTALLATION
Following examples show how to install the instruments on cone-roof tank, floating roof tank and sphere tank using stand pipes.

FW9000NN

FW9000NN

FW9000NN

CALIBRATIONCHAMBERBALL VALVEDISPLACERDISPLACER
DIR110NN series

DISPLACER

DIR110NN series
DIR110NN series

CONE ROOF TANKFLOATING ROOF TANKSPHERICAL TANKCOMMUNICATION FUNCTION
Avarious kinds of communication are available for FW-9000NN asshown below SUPER INTELLIGENT TANK GAUGE:

2) COMPATIBLE FORMATS FOR TOKYO KEISO'S EXISTING TANKDATE TRANSMITTERS
a. DM-II type1) STANDARD OUTPUT FORMAT OF FW-9000N

b. DB-M typec. DM typeTransmission type

2 way-2 wire serial data transmission

Baud rate

2400 bps

Topology

Bus line wiring (16 tanks/BUS)

Distance

Max.5 kmd. FW-7000 series3) Other serial communications
a. RS-485 MODBUS(Wiring condition: wiring resistance 20 Ω/

Transmission type : RS-485 (2-wire)

one way capacitance 0.5 μ F/m)

Baud rate: 2400/4800/9600bps

Distance: 1.2kmb. FOUNDATION Field bus
Base corrent: max 18mA

I/O signal: IEC 61158-2 compatible

Protocol: FOUNDATION Field bus H1

H1 Profile class: 31PS, 32L

H1 Device class: Link Master

Function block: 1-RB2, 1AI, 1TB

c. TRL/2 compatible*Field bus communication of Rosemountd. V1 compatible*Field bus communication of E+H

6TOKYO KEISO CO., LTD.

TG-L1021-E02

FW9000NN Series Servo Balance-type Level Gauge

EXAMPLE OF CONFIGURATION
1) Example of system configuration
ReceiverFW9000NN level gauge

JB
Averagetemperature sensor

DIR series receiver(1:1 connection)

Averagetemperature sensor

DIR-530
NMR-4000
receiverDIR110NN
Multipoint spot
temperature sensor

JB

I/F

CRT series
CRT receiver

Host computer or DCS︺︺
4 to 20mA DC output

4 to 20mA DC output

Sub terminal A

JB

Average temperature sensor

MTR seriesMulti-terminal receiverpressure
sensorMain terminal︹Spottemperature sensor

I/F box

Valve / Solenoid valve etc.
External contact input (Limit switch etc.)

Pump / Motor etc.
Sub terminal B

2) Example of Local configuration / wiring system figure
1 . 2 5 Sq − 2 C (Shield)
Example 1.
temperature
sensor

FW9000NN
level gauge

2c

to Control room side

*1
Power switch

2c
DIR110NN

2cPower switch
for tank side receiver

4 to 20mA DC output (Level data)
Applicable for DCS, Indicator, and recorder

100 to 240 V AC
*1 : 1.25 Sq –n C (Shield)
n : Total of following
For signal to control room 2C
For signal to tank side receiver 2C

Example 2.
4 to 20mA input frompressure sensor etc.
temperature
sensor

FW9000NN
level gauge2c*1Power switch

2c

Power switch
for tank side receiver

Relay contact output(Max. 6 points)*2
Tank side
receiver2c

TG-L1021-E02*2 : 1.25 Sq –m C (Shield)
m : Total of following
For signal to control room 2C
For relay contact output (2+point)C
For external contact inputs (2+point)C

JB

External contact input(Max. 4 points)
to Control room side1 . 2 5 Sq − 2 C (Shield)
100 to 240 V ACTOKYO KEISO CO., LTD.

7

FW9000NN Series Servo Balance-type Level Gauge

ORDERING FORMTANK SPECIFICATIONLIQUID NAMEDENSITY
VISCOSITY
LIQUID TEMPERATUREPRESSURE
TANK TYPE
MEASURING RANGE
MAX. LEVEL CHANGE SPEED
MODEL CODEPROCESS CONNECTION
FLANGE SIZEFLANGE RATINGDISPLACER GUIDING
MATERIAL
DRUM COMPARTMENTDISPLACER
MEASURING WIREOUTPUT AND INPUT
A. REMOTE OUTPUT*

B. 4 to 20mA OUTPUT*
C. CONNECTED THERMOMETER*
EXTERNAL CONTACT OUTPUT
EXTERNAL ANALOG INPUT(4 to 20mA DC)
POWER SUPPLYVOLTAGECABLE ENTRY
CABLE GLAND
SPECIAL MEASUREMENT FUNCTION
INTERFACE MEASUREMENTDENSITY MEASUREMENTAPPLICATIONCONSTRUCTIONACCESSORIESCALIBRATION CHAMBERISOLATION BALL VALVELOCAL POWER SWITCH

mPas
C
MPa
쏔 CONE ROOF
쏔 FLOATING ROOF
mm
mm/min.
FW9첸첸첸NN첸쏔 SPHERICAL쏔 150mm (6") 쏔 125mm (5") 쏔 100mm (4")
쏔 JIS 5K RF
쏔 JIS 10K RF 쏔 JPI #150
쏔 ANSI#300
쏔 JIS30KRF
쏔 NON-GUIDE쏔 STAND PIPE
쏔 SPECIAL ()
쏔 AC2A쏔 SUS304
쏔 PTFE쏔 SUS316
쏔 OTHERS (쏔 SCS13쏔 SCS14
쏔 SUS316
쏔 SUS316L
쏔 OTHERS ()
쏔 MA (Equiv. to HASTELLOY)
)

쏔 (

)

쏔 80mm (3") 쏔 Others (쏔 ANSI#150 쏔 JIS 20K RF
쏔 OTHERS ()
쏔 GUIDE WIRE)쏔 Others ()
쏔 MA (Equiv. to HASTELLOY)쏔 FEP COVERED쏔 WITHOUT DIGITAL OUTPUT
쏔 FF
쏔 FW-9000 (STANDARD)쏔 DM-II쏔 DM
쏔 DB-M쏔 FW-7000
쏔 RS-485 MODBUS쏔 TRL/2 쏔 V1
쏔 NOT REQUIRED쏔 REQUIRED (쏔 LEVEL, 쏔 TEMPERATURE)
쏔 REQUIRED (HART) (쏔 LEVEL, 쏔 TEMPERATURE)쏔 NOT REQUIRED쏔 SPOT TYPE
쏔 AVERAGE TYPE쏔 NOT REQUIRED쏔 REQUIRED (POINTS)쏔 NOT REQUIRED쏔 REQUIREDV AC (100 to 240 V AC acceptable)쏔 G (=PF)FEMALE쏔 NPT FEMALE쏔 Others ()
쏔 CUSTOMER'S SCOPE 쏔 TOKYO KEISO SCOPE (Cable diameter
쏔 NOT REQUIRED쏔 NOT REQUIRED쏔 GENERAL
쏔 GENERAL쏔 COLD REGION SPEC.
쏔 NOT REQUIRED쏔 NOT REQUIRED쏔 NOT REQUIRED쏔 REQUIRED (DENSITY : UPPER쏔 REQUIRED쏔 CUSTODY쏔 SANITARY FINISH
쏔 SPECIAL ()

쏔 TOKYO KEISO SCOPE쏔 TOKYO KEISO SCOPE쏔 TOKYO KEISO SCOPE

mm)
LOWER

쏔 CUSTOMER'S SCOPE쏔 CUSTOMER'S SCOPE쏔 CUSTOMER'S SCOPE*: Up to two instruments are available.

* Specification is subject to change without notice.

Head Office : Shiba Toho Building, 1 – 7 – 24 Shibakoen, Minato-ku, Tokyo 105 – 8558
Tel : +81-3 – 3431 – 1625 (KEY) ; Fax : +81-3 – 3433 – 4922
e-mail : overseas.sales@tokyokeiso.co.jp ; URL : https://www.tokyokeiso.co.jp

8

TOKYO KEISO CO., LTD.

TG-L1021-E02)