FineTek FD7 Series User manual

Material
OD8SUS SPST 50W300Vac/350Vdc
OD9.5 SUS SPST 50W300Vac/350Vdc
SPDT 20W150Vac/200Vdc
OD12.7 SUS SPST 50W220Vac/500Vdc
SPDT 50W400Vac/1000Vdc
0.5A
0.5A
1A
3A
1A
2.5A
2.5A
2A
4A
2A
Tube Type Switching
Contact from
Switching
Capacity Max.
Switching
Voltage Max.
Switching
Current Max.
Carry
Current Max.
FD7 Series Explosion Type Magnetic Float
Level Switch Operation Manual
PRINCIPLE
INDUCTIVE / CAPACITIVE LOADS
1) Open the cap of housing, connect the wire onto terminal through the conduit.
2) Check the terminal wire connection is correct for each float.
3) Connection Type : Please refer to Fig.1 below.
A) 1NO : Meaning that the NO-C circuit will be close while liquid level higher than the float
ball by mark of " ON".
B) 1NC : Meaning that the B-C circuit will be close while liquid level lower than the float ball
by mark of " ON".
C) 1C : Meaning that the NO-C circuit will be close while liquid level higher than
the float ball and NC-C circuit will be close while liquid level lower than
the float ball.
4) Please screw up the housing cap and fix the conduit outlet to prevent the moisture to
soak in.
CONNECTION INFORMATION
SPECIFICATION
WIRING
1NO 1C1NC 1NO 1C1NC 1NO 1C1NC
2NO 2C2NC 2NO 2C2NC 2NO 2C2NC
3NO 3C3NC
4NO 4C4NC
5NO 5C5NC
3NO 3C3NC 3NO 3C3NC
4NO 4C4NC 4NO 4C4NC
5NO 5C5NC 5NO 5C5NC
1
3
2
4
5
SPECIFICATION
(Fig.1)
1.Inductive : When using a reed switch with inductive loads such as motors,
relays,solenoids..etc, the contact will be subjected to a high induced voltage
during opening of the contact(load circuit). Such high induced
voltage(transients) may cause damages to the reed switch or significantly
reduce it life. Therefore,protective circuits such as : RC(snubber), varistors or
clamping diodes are recommended.
2.Capacitive : When using a reed switch with capacitive loads such as
capacitors,incandescent lamps or long cables, the contact will be subjected
to a high surge(inrush) current. Therefore, protective circuits such as:
surgesuppressors or current limiting resistors are recommended.
NEPSI Ex d IIC T3~T6 Gb
ATEX II 2 G Ex d IIB T3 or T4 or T5 or T6 Gb
II 2 D Ex tb IIIC T200BC or T135BC or T100BC or T85BC Db
IECEx Ex db IIB T3 or T4 or T5 or T6 Gb
Ex tb IIIC T200BC or T135BC or T100BC or T85BC Db
The single unit or multiple reed switch units are housed tightly in stainless steel stem and
tount the float ball to penetrate through the stem, then the liquid buoyancy will deliver the float
up and down at the specified position by graduating rings. When the reed switch is induction
the float internal magnet, then it will actuate the reed switch contact point to create an open or
close circuit. We can apply such on-off output signal to reach liquid level controlling and
monitoring purpose. The permanent magnet is interlined into the middle of the specified float
balls. You Can mhe figures below show the float orientations on N.O. (Normal Open) and N.C.
(Normal Close).
2 2
SUS floats is 35kg/cm (S10 floats can reach 50kg/cm )
2
1.Pressure Rating : Max. pressure of plastic floats is 5kg/cm and max. pressure of
2.Lead Wire : XLPE (UL3266, AWG22)
APPLICABLE MODEL:FD7 Series
ATEX

1) Please clean the impurity from pivot & float regularly.
2) Please check if the stopper's screws are loose.
MAINTENANCE
1) Please check the packing situation.
2) Please contact us while find the damage.
3) Please check carton content :
a) One set of Complete Product.
b) One set Operation Manual.
c) One set Quality Approval.
BEFORE USE
TROUBLE SHOOTING
INSTALLATION
Trouble Pussible cause Solution
Float Doesn't
Work
The float's S.G. is bigger
than liquid Confirm the S.G. Again.
The float leaks. Contact us to change the float.
The granule blocks float Clean the granule.
No Signal The float is out of position Adjust float position.
The reed switch is
malfunction. To change reed.
Un-Normal
Signal Interfered by magnetic field. Solve Magnetic field problem.
Please contact us if there are any queries.
The float level switch should be mounted far
away from liquid inlet, any strong liquid
fluctuation will produce error output signals.
There better be an L type supporter, when the
switch is mounted in concrete wall tank as
figure below.
It is requested a pipe shield or equivalent
device to normalize the switch actuation if
the switch is used with any agitator application.
It is recommended to select the standpipe with
diameter larger than the float ball for installation
process.
*d> Float diameter
d
7. Customers can't change the internal components and have to check the outer.
6. The level of temperature class for explosion sign and its maximum allowed
temperature relating to the medium.
5. Corrosive gas or liquid application isn't available for Aluminum & Stainless (SUS)
material.
3. Cable conduit should equip with explosion approval device (AD105DS). It can't be
revised arbitrarily and have to lock well.
1. There is an internal/external ground terminal in the housing. Please be sure to ground
terminals when you use.
2. When install or maintain in the field, to comply with the caution "Open after power off"
4. Be sure to obey the safe regulation of electric appliance for dangerous field when
install and maintain.
INSTALLATION INSTRUCTION FOR EX-PROOF PRODUCTS:
08-FD7-B5-EM,04/28/2021
Tel: [phone] Fax: [phone]
Email: [email protected] http://www.fine-tek.com
No.16, Tzuchiang St., Tucheng Industrial Park, New Taipei City 23678, Taiwan.
FineTek Co. , Ltd.
Temp. categories
Max. surface temp.
T3 T4 T5 T6
Medium temp. 135BC
≦
200BC
≦85BC
≦
130BC
≦
195BC
≦80BC
≦
95BC
≦
100BC
≦