KEYENCE FU-95HZ User Manual

■ Symbols

Fiber for Liquid Level Detection

FU-93(Z)/FU-94C FU-95(Z/HA/S/W)

Instruction Manual

Note

Cable ties (x2)

Nonslip rubber tubes

Shorten with a cutter or simil ar tool.

Wrap the cable tie in the correct direction.

Cable tie

Image from above

Nonslip rubber tube

Lock

Cut here

Pull both locks (upper and lower) out.

Adjust the sensor position up or down.

Push both locks (upper and lower) in.

Lock

Note

Cable ties (x2)

Nonslip rubber tubes

Shorten with a cutter or similar tool.

Nonslip rubber tube

Wrap the cable tie in the correct direction.

Note

Spacer (Accessory)

Model: OP-82177 (applicable pipe diameter is between 26 and 80 mm)

Cable ties (x2)

Nonslip rubber tubes (x2)

Contents

Wrap the cable tie in the correct direction.

Nonslip rubber tube

Cut here

Note

Barrier plate

The following symbols and conventions provide notifications for important messages. Be sure to read these messages carefully.

96M00241

■ FU-95(Z/HA)

There are two methods for installation with FU-95(Z/HA).

Directly installing to a pipe

Two cable ties and some nonslip rubber tubes are included. Cut the nonslip rubber tubes to the appropriate length.

While making sure to keep the cable ties facing the correct direction, install to a pipe as shown in the figures below.

Provides additional information on proper operations that can be easily mistaken.

Installing on a Pipe (FU-95 Series)

■ FU-95S

Installing

Two cable ties and some nonslip rubber tubes are included. Cut the nonslip rubber tubes to the appropriate length.

With both locks on the sensor pushed in, install to a pipe as shown in the figures below. Make sure that the cable tie faces the correct direction and that it passes through the correct position.

Be sure to use cable ties for installation.

Installing with the mounting holes

As shown in the figure, use the included spacer to install snugly against a pipe.

* Use a maximum torque of 0.5 Nm to tighten the screws.

■ FU-95W

Obtain two cable ties* and two nonslip rubber tubes of appropriate length. * Make sure that the width of the cable ties is no more than 5 mm so that the cable ties can pass

through the mounting holes on the sensor.

An installation kit is also available as an option.

Installing

Wrap the cable tie around the pipe in the correct direction as shown in the figure. Cut the nonslip rubber tubes into an appropriate length.

Install a second cable tie in the same manner through the bottom and tighten both ties securely. Finally, cut off the excess.

Adjusting position after installation

Be sure to use cable ties for installation.

Install a second cable tie in the same manner through the bottom and tighten both ties securely. Finally, cut off the excess.

• Be sure to use cable ties for installation.

• When the FU-95W is installed on a pipe with a small diameter, if there is an object moving outside of the pipe as shown in the figure, the receiving light intensity of the sensor may fluctuate (especially when there is liquid in the pipe). In such a case, place a barrier plate (matte black recommended) between the pipe and the moving object.

Specifications

2008

00241E 1112-2 96M00241

Safety Precautions

■ Liquid-contacting (fluorocarbon polymer) type

Model FU-93 FU-93Z FU-94C

Detection target Liquid

Repeatability 1 mm max. (for water)

Pressure resistance -49 kPa to 490 kPa

Ambient temperature

Minimum bend

radius

Fiber length 2 m (free-cut) 2 m

Fiber material Plastic (fluorocarbon polymer coating)

Accessory

*1 No freezing *2 Hydrofluoric acid cannot be used in detection.

Detection also cannot be performed with some liquids, such as those with a milky-white color.

Fluorocarbon

polymer section

Fiber section R25 mm R0.5 mm R25 mm

Weight Approx. 78 g Approx. 90 g

-40 to +70C -40 to +50C -40 to +200C

R40 mm (Cannot be bent within 80 mm from the edge)

Fiber cutter x 1, Adapter A x 1

Model silicon tube (FU-93Z only) x 1

Multicomponent glass (Fluorocarbon polymer

coating, with SUS

protective tube)

None

■ Pipe mounting type

Air bubble/dripping

Type

Model FU-95S FU-95W FU-95Z FU-95HA FU-95

Detection target

Mounting

transparent

pipe diameter

Repeatability 1 mm max. (for water)

Ambient

temperature

Relative humidity 35 to 85% RH (No freezing)

Minimum bend

radius

Fiber length 2 m (free-cut)

Main unit

Material

Fiber

Weight Approx. 23 g Approx. 20 g Approx. 7 g

Accessory

*1 The recommended pipe wall thickness is 1 mm (when using the FS-V10/V20/V30 Series). *2 No freezing. *3 Detection cannot be performed with some liquids, such as those with a milky-white color. *4 When normally used under high temperatures, the recommended ambient temperature is 90C

max. *5 FU-95HA uses fluorocarbon polymer coating. *6 OP-82177 for FU-95W [cable tie (W4.8 x H1.3 x L445) x 2, nonslip rubber tube x 2] is sold sepa-

rately and is compatible with pipe diameters from 26 to 80 mm.

countermeasures (16 optical axes)



4 to 26 mm

Polyetherimide

Cable tie

(W2.5 x H1.1 x

L203) x 2

Nonslip rubber

tubes x 2

Fiber

Cutter x 1

26 mm min.

recommended

(No upper limit)

-40 to +70C -40 to +50C

R5 mm R2 mm R25 mm R10 mm

PBT Polysulfon

Plastic (polyethylene coating*5)

Fiber

Cutter x 1

Compact (Single optical axis)

Liquid

-40 to +105

Cable tie (W3.6 x H1.1 x L142) x 2, Nonslip rubber tubes x 2, Spacer (5 x 6) x 2, Screw (M3 x 20) x 2, Hexagonal nut (M3) x 2,

Fiber cutter x 1, Adapter B x 1

4 to 26 mm

C*4-40 to +70C

■ Precautions for sensitivity adjustment

Common

• As noted above, when the liquid level detection sensor is used to detect water or another type of colorless, clear liquid, the detection principles state that the received light intensity is higher when there is no liquid and lower when there is liquid (during contact with a liquid).

• If the liquid has a milky-white color or another highly reflective color, the received light intensity increases when there is liquid, which may reduce the sensitivity in terms of detecting the presence of a liquid.

• If chattering occurs due to problems such as bubbles or dripping, use a timer to delay detection.

• If there are concerns about fluctuations of the displayed value when using a digital display amplifier, use the scaling function on the FS-V30 Series amplifier unit.

■ Precautions about mounting

Liquid-contacting type FU-93(Z)/94C

• A thermal expansion tube is inserted 80 mm from the end in order to secure the sensor section and the fluorocarbon polymer tube. Bending or cutting this area will cause the rigid properties to weaken.

• Do not pull or apply excessive force to the fiber cable. Keep pulling to a maximum of 30 N3sec.

• Clean before use according to the operating environment.

• If means are needed to differentiate between FU-93 and FU-93Z, attach the silicon tube that comes with FU-93Z to the fiber cable.

Pipe mounting type FU-95(Z/HA/S/W)

• Detection may not be possible when using a pipe with thick walls (3 mm or higher).

• Opaque pipes cannot be used.

• Do not pull or apply excessive force to the fiber cable. Keep pulling to a maximum of 10 N3sec.

■ Precautions for liquid level detection

Liquid-contacting type FU-93(Z)/94C

• Stable detection may not be possible when using one of the following liquids.

When bubbles are attached to the sensor tip When liquid drips onto the sensor tip during a period of no liquid contact or when liquid is attached to the sensor tip Liquids with highly reflective color, such as milky-white Liquids that stain the fluorocarbon polymer coating, such as high temperature oil

• Hydrofluoric acid or high temperature substances such as acids, alkali, or vapors can pass through the fluorocarbon polymer coating, corrode the internal fibers, and lead to damage or a reduction in sensitivity.

• When used under high temperatures, the fluorocarbon polymer becomes a maximum of 3% of the total length longer. Take this into consideration when determining the mounting position.

Pipe mounting type FU-95(Z/HA/S/W)

• Stable detection may not be possible when using one of the following liquids.

When bubbles occur in the pipe When dripping occurs on the inside of the pipe walls Liquids that stain the transparent tube

• The 16 optical axis type is less affected by bubbles and dripping than the single optical axis type.