INSTRUCTION MANUALLEVEL SWITCH

LV-300No.LV31JE6 2021.10
To prevent accidents arising from the misuse of this instrument, please ensure the operator
receives this manual.
Safety Precautions (Be sure to read these precautions before using our products.)
The safety precautions are classified into categories: “Warning” and “Caution”.
Caution may be linked to serious results,
Depending on circumstances, procedures indicated byso be sure to follow the directions for usage.

Warning

Procedures which may lead to dangerous conditions and cause
death or serious injury, if not carried out properly.

CautionProcedures which may lead to dangerous conditions and cause
superficial to medium injury or physical damage or may degrade or
damage the product, if not carried out properly.

Warning• To prevent an electrical shock or fire, only Shinko or other qualified service personnel may

handle the inner assembly.
• To prevent an electrical shock, fire or damage to the instrument, parts replacement may only
be undertaken by Shinko or other qualified service personnel.

Safety Precautions• To ensure safe and correct use, thoroughly read and understand this manual before using thisinstrument.
• This instrument is intended to be used for industrial machinery, machine tools and measuring
equipment. Verify correct usage after purpose-of-use consultation with our agency or mainoffice. (Never use this instrument for medical purposes with which human lives are involved.)• External protection devices such as overcurrent protection fuse, etc. must be installed, asmalfunction of this product could result in serious damage to the system.
Proper periodic maintenance is also required.
• This instrument must be used under the conditions and environment described in this manual.
Shinko Technos Co., Ltd. does not accept liability for any injury, loss of life or damage occurring
due to the instrument being used under conditions not otherwise stated in this manual.

Caution with Respect to Export Trade Control Ordinance

To avoid this instrument from being used as a component in, or as being utilized in themanufacture of weapons of mass destruction (i.e. military applications, military equipment,etc.), please investigate the end users and the final use of this instrument.
In the case of resale, ensure that this instrument is not illegally exported.

Installation Precautions
CautionThis instrument is intended to be used under the following environmental conditions(IEC61010-1): Overvoltage category , Pollution degree 2
Ensure the mounting location corresponds to the following conditions:• A minimum of dust, and an absence of corrosive gases• Few mechanical vibrations or shocks• No exposure to direct sunlight, an ambient temperature of 0 to 55 (32 to 131 )that does not change rapidly, and no icing• Mount the instrument at the position where granule level actually changes.
1• If the granule load is large, mount an adequate guard plate.
• Avoid mounting the instrument under the falling point of granules as well as near theoutlet.
• Mount the unit using the Main unit mounting nut.
When it is difficult to set or remove the wing in a hopper, use a flange (sold separately).
• Do not push and insert wing shaft too hard.
Insert it up to the point carefully, and then revolve it manually.

Wiring Precautions
CautionThis instrument has no built-in power switch and fuse.
It is necessary to install a power switch and fuse near the instrument.
(Recommended fuse: Time-lag fuse, rated voltage 250 V AC, rated current 2 A)

Operation and Maintenance Precautions
Caution• Do not touch live terminals. This may cause electrical shock or problems in operation.
• Turn the power supply to the instrument OFF before retightening the terminal orcleaning. Working on or touching the terminal with the power switched ON may
result in severe injury or death due to electrical shock.
• Use a soft, dry cloth when cleaning the instrument.
(Alcohol based substances may tarnish or deface the unit.)• Do not strike or scratch it with a hard object or put pressure on it.

1. Name of Sections
(4)

(3)

(1)

(2)

(5)

(1): Cover(2): Case(3): Main unit mounting nut(4): Wing shaft fixing nut(5): Detector wing(6): Cabtyre cord(7): Solderless terminal (ring type)

(6)

(7)
(Fig. 1.1)
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2. Mounting to Hopper

2.1 Site Selection and Precautions
Ensure the mounting location corresponds to the following conditions, and follow
precautions below.
(1) A minimum of dust, and an absence of corrosive gases(2) Few mechanical vibrations or shocks(3) No exposure to direct sunlight, an ambient temperature of 0 to 55 (32 to 131 )that does not change rapidly, and no icing(4) Mount the instrument at the position where granule level actually changes.
(5) If the granule load is large, mount an adequate guard plate.
(6) Avoid mounting the instrument under the falling point of granules as well as near theoutlet.
(7) Mount the unit using the Main unit mounting nut.
When it is difficult to set or remove the wing in a hopper, use a flange (sold separately).
(8) Do not push and insert wing shaft too hard.
Insert it up to the point carefully, and then revolve it manually.
2.2 Mounting Examples[Good example]• Horizontal mounting• Vertical mounting

Inlet

Inlet
Empty room

Level changing
area

OutletArea where material tends
to accumulate(Fig.2.2-1)

Outlet(Fig.2.2-2)

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• For large loading(Mount the guard plate when the granule loading is large.)

Inlet
Empty room

Guardplate

Area where material tends toaccumulate
Outlet(Fig.2.2-3)[Bad example]• Under the inlet• Near the outlet

Inlet

Inlet
Empty room

Area where material tends
to accumulate
Outlet(Fig.2.2-5)

Outlet(Fig.2.2-4)
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Nut and flange mounting[Nut Mounting][Flange Mounting]
HopperHopperFlangeMain unit mounting nut(Fig.2.2-6)(Fig.2.2-7)
When using the LV-300 with a flange,
make a hole on the hopper whichenables the wing to enter.

2.3 Mounting of Wing Shaft(Fig.2.3-1)(Fig.2.3-2)(Fig.2.3-3)

Insert the wing shaft up to the point where it can be inserted fully to the end position.
When it is difficult to insert the wing shaft to the end, revolve the wing shaft manuallyclockwise or counterclockwise. See (Fig.2.3-2).
Tighten the wing shaft with the fixing nut. See (Fig.2.3-3).

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NoticeTighten the Wing shaft fixing nut and Main unit mounting nut with the specified torqueas shown below, otherwise the screws will be damaged.
(Table 2.3-1)
Wing shaft fixing nut
Main unit mounting nut

Appropriate Torque
15 N•m20 N•mMaximum TorqueWithin 30 N•m
Within 30 N•m

2.4 External Dimensions (Scale: mm)
Detector length (L)

8182

80

38Detector Length (L) Mounting Direction
85 mm
100 mm
150 mm
200 mm
Vertical mounting
250 mm
Vertical mounting
Please specify the detector length whenordering.

(Fig 2.4-1)

27+10

2.5 Hopper Cutout (Scale: mm)(Fig 2.5-1)

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3. Terminal Arrangement
Warning
Turn the power supply to the instrument OFF before wiring and checking.
Working on or touching the terminal with the power switched ON may result in severe
injury or death due to electrical shock.

CautionThis instrument has no built-in power switch and fuse.
It is necessary to install a power switch and fuse near this instrument.
(Recommended fuse: Time-lag fuse, rated voltage 250 V AC, rated current 2 A)

ＡＣPower supply

１

２

Terminal CodeAC1
2
3

３

Load

Solderless terminal for the cabtyre cord
Use a solderless terminal (ring type) in whichan M4 screw fits as shown in (Fig. 3-1).

Lead Wire ColorWhite
Orange (Yellow)
BlackBrown
Green

8 mm

4.3 mm(Fig. 3-1)

4. Operation and Action

4.1 Operation
When mounting to the hopper and wiring are completed, check the action as follows.
(1) Turn the power supply to this instrument ON.
(2) Detector wing starts to revolve with no load.
Between terminals 1 and 2 : Conductive
Between terminals 2 and 3 : Open
(3) When the load is added to the detector wing, the wing stops rotating.
Between terminals 1 and 2 : OpenBetween terminals 2 and 3 : Conductive
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4.2 Action Explanation
When granule resistance is applied to the detector wing, the wing stops because thegranule resistance keeps it from revolving.
Micro switch between terminals 2 and 3 for internal load is conducted by the bar fixed
on the motor.
When the granule resistive load is given, power supply for the motor is disconnected
because the micro-switch for the motor operates.
When the granule level lowers, the detector wing is exposed, granule resistance does
not work and the detector wing starts to revolve with the motor.
Micro switch between terminals 1 and 2 for internal load is conducted at this time.

5. Specifications

Name:
Level switch
Model:
LV-300Torque:Detecting torque: 0.049 N•m (0.5 kg•cm) minimum (fixed)
Number of revolution: 1 min-1 (60Hz)
Power supply voltage: 100 V, 110 V, 115 V, 200 V, 220/230 V, 240 V AC (Must be specified)
50/60 Hz
Allowable voltage fluctuation range: 15% of the power supply voltage
Contact capacity:
3 A 250 V AC (resistive load)
Ambient temperature: 0 to 55
Detector length:85, 100, 150, 200, 250 mm (Must be specified)
Mounting:
Nut screwing (Mounting part thickness: Maximum 7 mm)Material:
Case, Cover: Aluminum die-cast
Detector shaft: Stainless steel, 8.0 mm
Detector wing: Stainless steel, t1.5 mm
Lead wire: 5-core cabtyre cord, Length: 2 m
Weight (Including cabtyre cord 2 m):
Detector
85 mm
100 mm
150 mm
200 mm
250 mmLengthWeight Approx. 645 g Approx. 650 g Approx. 670 g Approx. 690 g Approx. 710 g
Color: Case, Cover: 7.5BG4/2.5 (Munsell value)
Drip-proof/Dust-proof structure: IP66 (excluding parts from the Main unit mounting nut todetector wing)

SHINKO TECHNOS CO., LTD.
OVERSEAS DIVISION

Head Office: 2-5-1, Senbahigashi, Minoo, Osaka, 562-0035, Japan[URL]
https://shinko-technos.co.jp/e/Tel: +81-72-727-6100[E-mail]overseas@shinko-technos.co.jp
Fax: +81-72-727-7006

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