LIQUID LEVEL TRANSMITTER (FLOAT TYPE)
DATA SHEET
FNF
This is a liquid level transmitter utilizing an induction
potentiometer.
The vertical displacement of a flat on a liquid surface in
an open tan k is conveyed by a strip of stainless steel wire
rope to the transmitter body, and inputted as a rotating angle
to the induction potentiometer which transmits a signal
current of 4 to 20mA DC proportionate to the displacement
of the liquid level.
FEATURES
1. High reliability
Use of a contactless induction potentiometer means a
long life and high reliability of the instrument.
2. Various specifications available
The transmitter can be provided with intrinsically safe
explosionproofing, various materials for its components,
an arrester, an alarm unit plus other specs.
3. The operating principle and structure of the transmitter
are simplified which enables easy handling, maintenance
and inspection.
Materials:
SPECIFICATIONS
Measuring range: 0 to 0.5……40m
(Refer to standard measuring ranges)
Indicator:
Digital type (4 digits)
Allowance:
± 1.0% or ± 0.5% on request
Output signal:
4 to 20mA DC
Ripple content: 1.5% p-p (at approx. 25kHz)
Allowable load resistance:
0 to 550Ω (at 24V DC)
Power supply:
13 to 33V DC
(26V DC or less with intrinsically safe
explosionproofing)
(27V DC or less with arrester)
100V/24V ± 10% , AC 50/60Hz
(see "Example of configuration")
Wiring method: 2-wire type
Ambient temperature:
–30 to +80°C
(but not usable in freezing condition)
50°C max. with intrinsically safe
explosionproofing
60°C max. with arrester
Ambient humidity: Less than 95% RH
Liquid temperature: Less than 45°C
(when float material is PVC-vinyl
chloride-)
Float; Hard PVC or SUS304 (stainless
steel)
Rope: Teflon coating on stainless steel
wire
Counterweight; Iron piece coated with
zinc metallikon or SUS304
Instrument body; Aluminum alloy
Conduit connection: G3/4
Case:
Splash-proof type (JIS C 0920)
Arrester:
Built in on request
Explosionproof structure: Intrinsically safe explosionproofing i3nG5
Mass {weight}:
Approx. 10.5kg
(excluding float and counterweight)
External dimensions (H × W × D):
Approx. 320 × 346 × 218mm
Finish color:
Silver (melamine paint); may be provided
with acid and alkaliproof treatment
Optional attachment: Alarm unit (limit switch)
(Alarm unit can't be installed with
intrinsically safe explosionproof)
structure);
Contact capacity
250V AC 5A
230/115V DC 0.2/0.4A
N.O.-1a- contact
3 pieces are available in the
transmitter for upper limit and
lower limit
EDS7-3i
Date
July. 18, 2006
FNF
Range of delivery: Transmitter and standard accessories
(rope, float, and counterweight)
Standard measuring ranges
Measuring
ranges
Measuring
ranges
Measuring
ranges
Measuring
ranges
0 to 0.5m
0 to 3.5m
0 to 6.0m
0 to 10.0m
0 to 1.5m
0 to 4.0m
0 to 6.5m
0 to 12.0m
0 to 2.0m
0 to 4.5m
0 to 7.0m
0 to 14.0m
0 to 2.5m
0 to 5.0m
0 to 8.0m
0 to 15.0m
0 to 3.0m
0 to 5.5m
0 to 9.0m
0 to 16.0m
CODESYMBOLS
1 2 3 4 5 6 7 8
9 10 11 12 13
F NF
1
4
Description
Lenght of rope [m]
5
10
15
20
25
30
40
50
60
80
A
B
C
D
E
F
G
H
J
K
Float material
PVC
SUS304 (stainless steel)
V
S
Counterweight material
Steel
SUS304 (stainless steel)
E
S
RELATED DEVICE
Transmitter
4 to 20mA
4 to 20mA intrinsically safe
explosionproof structure
Arrester with "A"
A
B
K
Distributor
ORDERING INFORMATION
1.
2.
3.
4.
5.
6.
7.
Object to be measured ro application
Product name
Code symbols
Measuring range
Rope lenght
Float, counterweight meterial
Whether or not any attachments (guide pulley, alarm
unit, etc.) are required
8. Whether or not wxplosionproofing and other measures
are required
9. Other matters that demand care
Alarm unit (limit switch)
Note: Impossible when "B"
specified in 7th dight
of code.
None
Upper.lower limit, 1 piece each
Upper.lower limit, 2 pieces each
Upper.lower limit, 3 pieces each
0
2
4
6
Guide pulley
None
Provided with 1 pulley
Provided with 2 pulleys
Provided with 3 pulleys
0
1
2
3
0
1
Y
* B
* D
Allowance
±1% (standard instrument)
±0.5%
(high allowance instrument)
Treatment
Standard
Acid and alkaliproof treatment
Chlorine-proof treatment
INSTALLATION DIAGRAM
CONNECTION DIAGRAMS
2
PRINCIPLE OF INDUCTION POTENTIOMETER
flux at S1 will increase and that at S2 will decrease. According
to this difference an output voltage is provided which is
proportional to the ring displacement (input rotating angle).
When the short circuit ring is positioned at the center,
the magnetic flux at left and right sides is equal and the
voltages produced at detecting coils S 1 and S2 are equal.
But if the ring rotates to the right side for example, then the
EXAMPLE OF CONFIGURATION
O-
I-
O+
I+
With 24V DC power supply
O-
+
O+
-
With 100V/24V AC power supply
3
FNF
Transmitter
Approx. 218
Approx. 160
14
27
ø332
20
45
ø262
Pulley
15
180
Stopper
50
31
280
100
320
"A"
Conduit connection (2 pieces)
2-ø18
holes
318
Details of "A"
8
ø20
Counterweight
16
Float
G 3/4
Float
Counterweight
SUS304 (stainless steel)
Hard PVC
250
262
ø21
16
30
Guide
ø38
Guide
18
Approx. 277
ø3.5 hole
185
150
ø3.5 hole
140
175
5
Approx. 276
ø216
ø216
Caution on Safety
Asterisked (*) items: Non-standard.
*Before using this product, be sure to read its instruction manual in advance.
Head Office
Gate City Ohsaki, East Tower, 11-2, Osaki 1-chome,
Shinagawa-ku, Tokyo 141-0032, Japan
http://www.fesys.co.jp/eng
Instrumentation Div.
International Sales Dept.
No.1, Fuji-machi, Hino-city, Tokyo, 191-8502 Japan
Phone: 81-42-585-6201, 6202 Fax: 81-42-585-6187
http://www.fic-net.jp/eng
Information in this catalog is subject to change without notice.
Printed in Japan