Toshiba L5232 User Manual

6F8A0917

Electromagnetic Flowmeter Converter

LF232 Type

INSTRUCTION MANUAL

NOTES

Before using the equipment, please read this manual carefully and understand the contents, and then use the equipment correctly.

• NEVER attempt to operate the equipment in any ways that are not described in this

instruction manual.

• After reading this manual, store it with care in a place where it can be referred to

whenever needed.

• Please be sure that this manual is delivered to the personnel who will use this

product.

6F8A0917

NOTICE

Thank you very much for your purchase of our LF232 Type Electromagnetic Flowmeter Converter.

This instruction manual describes about the precautions required when using the LF232 converter, installation, configuration and maintenance. It is intended for the personnel in charge of the installation, operation and maintenance.

To use this product properly and safely, read this manual carefully before using this product. After reading this manual, store it in a place where it can be referred to whenever needed.

Toshiba LF232 electromagnetic flowmeter converters can be used in combination with various types of electromagnetic flowmeter detectors.

For the notes on usage, piping, installation, configuration and maintenance of the combined detector, check the model number of the combined detector and read the instruction manual of the relevant detector.

About Safety Precautions

Read the Safety Precautions described at the front carefully and understand the contents before using this product.

The “Safely symbols” used in the “Safety Precautions” are shown in a location such as in the margin to the left of the corresponding commentary in the main text.

This product does not conform to standards for overseas specific areas such as CE mark used in the EU market. Be careful that this product cannot be shipped to such areas where those standards are required.

NOTES

1. The reproduction of the contents of this Manual in any form, whether wholly or in part, is not permitted without explicit prior consent and approval.

2. The information contained in this Manual is subject to change or review without prior notice.

3. Be sure to follow all safety, operating and handling precautions described in this Manual and the regulations in force in the country in which this product is to be used.

Edition August, 2008

First Edition June, 2008

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6F8A0917

SAFETY PRECAUTIONS

Safety signs and labels affixed to the product and/or described in this manual give important information for using the product safely. They help prevent damage to property and obviate hazards for persons using the product.

Make yourself familiar with signal words and symbols used for safety signs and labels. Then read the safety precautions that follow to prevent an accident involving personal injury, death or damage to property.

Explanation of signal words

The signal word or words are used to designate a degree or level of hazard seriousness. The signal words used for the product described in this manual are WARNING and CAUTION.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may result in minor to moderate injuries or in property damage.

Notes:

1 “Serious injury” refers to an injury such as loss of sight, physical damage, burns (high

temperature or low temperature) electric shock, bone fracture and poisoning and the after effect of the injury remains or the injury requires hospitalization or long periods of outpatient treatment.

2 “Minor to moderate injuries” refers to burns, electric shocks, and so on, that do not require

the injured person to be hospitalized or go to a hospital for a long period of time for medical treatment. “Property damage” includes all kinds of damage to property, equipment or materials.

Safety symbols

The following symbols are used in safety signs and labels affixed to a product and/or in the manual for giving safety instructions.

Indicates an action that is prohibited. Simply DON’T do this action. The prohibited action is indicated by a picture or text inside or next to the circle

Indicates an action that is mandatory. DO this action. The mandatory action is indicated by a picture or text inside or next to the circle.

Indicates a potential hazard. The potentially hazardous situation is indicated by a picture or text inside or next to the triangle.

Color explanation

Background color: Yellow and Red, Border: Black, Picture display: Black

Background color: Yellow, Border: Black, Picture display: Black

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6F8A0917

SAFETY PRECAUTIONS

Safety Precautions for Installation and Wiring

Do not use the LF232 in an

atmosphere

DON’T

Install a switch and fuse

from mains power.

Turn off mains power

work.

Using this product in an explosive atmosphere can cause explosion.

Power supply from mains power can cause electric shock or circuit break-down.

before conducting wiring

explosive

to isolate the LF232

(continued)

Use an

the LF232.

Do not modify or disassemble

unnecessarily.

DON’T

Ground equipment. Type D (100 ohm or less ground resistance)

appropriate device

If this product falls to the ground, injury, or malfunction of or damage to the product, can be caused.

Modifying or disassembling this product can cause electric shock,

malfunction of or damage to this product.

the LF232

to carry and install

the LF232

independently from power

Wiring while power is applied can cause electric shock.

Turn off mains power

Working on pipes while power is applied can cause electric shock.

Do not conduct wiring work

Remaining electric charge even if power is turned off can still cause electric shock.

DON’T

before working on pipes. Use

The label shown left is placed near the terminal board for power supply on the converter.

Be alert to electric shock.

with bare hands

Operating this product without grounding can cause electric shock or

and GND terminal.

. Do not work on piping and wiring

hands

DON’T

malfunction.

crimped terminal lugs

Loose connections can cause electric shock, fire from excessive current or system malfunction.

Wet hands may result in electric shock.

for the terminal board

with wet

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6F8A0917

SAFETY PRECAUTIONS

Safety Precautions for Maintenance and Inspection

Do not touch the LF232 main body when

temperature fluid

DON’T

Do not conduct wiring work

DON’T

Do not use

is being measured.

The fluid raises the main body temperature and can cause burns when touched.

with wet hands

Wet hands may result in electric shock.

a fuse other than the one specified

high

(continued)

Do not conduct wiring work when

applied

DON’T

Use a rated fuse as follows:

Wiring while power is applied can cause electric shock.

The label shown left is placed near the terminal board for power input. (A black border and symbol on yellow triangle)

Be alert to electric shock.

power is

Diameter 5.2 mm × 20 mm

Normal blow

DON’T

Using a fuse other than the one specified can cause system failure,

damage or malfunction.

Fuse rating:

• 1A/250V for 100 to 240Vac or 110Vdc

• 2A/250V for 24 Vdc or large meter size spec. 100Vac or partially filled pipes spec. 100Vac

Dimensions:

Melting time characteristic:

Usage limitation

(1) This product is not manufactured for applying to a system requiring safety directly involved human

life as follows. Please contact your nearest Toshiba reprehensive if there is a possibility of using

this product for such use.

− Main control systems of nuclear power plants, safety protection systems in nuclear facilities or

other important systems requiring safety

− Medical control systems relating to life support

(2) This product is not approved for explosion-proof applications. Please do not use this product in an

explosive atmosphere (explosion protection area).

Warranty and Limitation of Liability

Toshiba does not accept liability for any damage or loss, material or personal, caused as a direct or indirect result of the operation of this product in connection with, or due to, the occurrence of any event of force majeure (including fire or earthquake) or the misuse of this product, whether intentional or accidental.

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6F8A0917

Handling Precautions

To obtain the optimum performance from the LF232 converter for years of continuous operation, observe the following precautions.

(1) Do not store or install the flowmeter in:

• Places where there is direct sunlight. If this is unavoidable, use an appropriate sunshade. If

the control keys (infrared switches) are exposed to direct sunlight, they may not function correctly.

• Places where there is snow and ice

Infrared switches may not function correctly.

• Places where excessive vibration or mechanical shock occurs.

• Places where high temperature or high humidity conditions obtain.

• Places where corrosive atmospheres exit.

• Places that can be submerged under water.

• Place where there is slop floor. To put the flowmeter temporarily on the floor, place it carefully

with something, such as stopper, to support it so that the flowmeter will not topple over.

•

Places where there is following factors.

◆Factors to impede infrared switch to operate properly

・Intense light such as direct sunlight and reflected sunlight by window glass or metal plate ・Place where brightness changes suddenly such as ON/OFF of lighting ・Dense smoke or steam near the control panel ・Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and haze

due to their attachment

・Light reflecting object near the control panel, or reflecting object such as metal plate placed

opposing to the control panel

When any of above factors is considered, take a measure for the proper operation of infrared switch such as to place a cover or to secure a space for at least a person to stand in front of the control panel.

When unable to avoid above factors, operate the EMF converter removing the factor by covering the control panel by hand so that light does not shine on it, by cleaning those attached on the control panel, or by standing in-between the reflecting object and the control panel to block the light.

(2) Wire cables correctly and securely.

Be sure to ground at the combined converter side (class D grounding (grounding resistance 100Ω or less)). Avoid a common ground used with other equipment where earth current may flow. An independent ground is preferable.

(3) The cable lead-in section must be tightened securely to keep air tightness.

(4) Keep the fluid to be measured from freezing.(This may damage the detector tube.)

(5) To prevent liquid leaks caused by corrosion, select materials appropriate for applicable fluids.

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6F8A0917

Handling Precautions

(6) The converter housing covers and the cable connections are tightened securely at the time of

shipment. Do not remove these covers or connections unless it is necessary to wire new cables or replace old ones. Otherwise, gradual deterioration of circuit isolation or damage to this product can be caused.

(7) Observe the following precautions when you open the converter housing cover:

• Do not open the cover in the open air unprotected against rain or wind. This can cause electric

shock or cause damage to the flowmeter electronics.

• Do not open the cover under high ambient temperature or high humidity conditions or in

corrosive atmospheres. This can cause deterioration of system accuracy or cause damage to the flowmeter electronics.

(8) This product may cause interference to radio and television sets if they are used near the

installation site. Use metal conduits etc. for cables to prevent this interference.

(9) Radio transmitters such as transceivers or cellular phones may cause interference to the

flowmeter if they are used near the installation site. Observe the following precautions when using them:

• Close a transmitter cover before using a transceiver.

• Do not use a transceiver whose output power is more than 5 W.

(continued)

• Move the antenna of a transceiver or a cellular phone at least 50 cm away from the flowmeter

and signal cables when using it.

• Do not use a radio transmitter or a cellular phone near the flowmeter while it is operating

online. The transmitter or cellular phone’s output impulse noise may interfere with the flowmeter.

• Do not install a radio transmitter antenna near the flowmeter and signal cables.

(10) For reasons of flowmeter failure, inappropriate parameters, unsuitable cable connections or

poor installation conditions, the flowmeter may not operate properly. To prevent any of these problems causing a system failure, it is recommended that you have preventive measures designed and installed on the flowmeter signal receiving side.

(11) For piping and installation of the combined detector, check the model number of detector and

read the instruction manual of the relevant detector.

* We assume no responsibility for nonconformity caused by violation of precautions described

in this manual or used in violation of the installation method and the operation method stipulated in a relevant ordinance or other regulations.

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6F8A0917

Table of Contents

1. Product Inspection and Storage···················································································10

1.1 Product Inspection······································································································10

1.2 Storage·······················································································································10

2. Overview ····························································································································11

3. Names of Parts·················································································································12

4. Installation·························································································································15

4.1 Cautionary Notes on Selecting the Installation Location············································16

4.2 How to Install the Converter·······················································································17

5. Wiring··································································································································19

5.1 Installation Cables······································································································20

5.2 External Connections ·································································································21

5.3 Cautionary Notes on Wiring························································································22

5.3.1 Cautionary Notes on Wiring between Detector and Converter······················22

5.3.2 Cautionary Notes on Wiring between Instruments and Converter·················22

5.4 Wiring Method ············································································································23

5.4.1 Terminal Treatment of Cable ·········································································23

5.4.2 Cable Connection··························································································25

5.4.3 Grounding······································································································27

5.5 Digital I/O Connections·······························································································29

5.6 Cautionary Notes on Replacing Converter·································································30

5.6.1 Replacing the LF230 Converter·····································································30

5.6.2 Combination with an Existing Detector (for Large Meter Size)······················31

5.6.3 Replacement of partially filled pipes type ····················································32

6. Operation···························································································································34

7. Display and Controls ······································································································36

7.1 Names and Functions of Display and Controls ··························································37

7.2 Display Format ···········································································································40

7.3 Basic Operations (Mode Switching, Setting Mode Operation, Total Counter Operation)························43

7.3.1 Mode Switching·····························································································43

7.3.2 Setting Mode Operation·················································································46

7.3.3 Password Input······························································································49

7.3.4 Totalizer Operation ························································································51

7.3.5 Maintenance Menu························································································53

7.4 Setting Menu List········································································································54

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8. Parameter Settings / Adjustment·················································································55

8.1 Parameter Setting Items·····························································································55

8.2 Parameters Check / Change······················································································56

8.2.1 Exciting Current Value···················································································56

8.2.2 Meter Size ·····································································································58

8.2.3 Exciting Frequency························································································60

8.2.4 Flow Direction································································································62

8.2.5 Password Setting···························································································64

8.2.6 Normal Indicating Unit···················································································66

8.2.7 Custom Unit···································································································69

8.2.8 Span Value (Range) ·····················································································72

8.2.9 Damping Constant·························································································79

8.2.10 Low Cutoff value····························································································81

8.2.11 Current Output Setting Used When an Alarm Occurs···································83

8.2.12 Display low cut On/Off···················································································85

8.2.13 Output Low Limit Setting ···············································································87

8.2.14 Digital I/O Function························································································89

8.2.15 Count Rate (Pulse Rate) and Pulse Width····················································93

8.2.16 Preset Counter ······························································································98

8.2.17 Flow Rate High/Low limit Alarm···································································101

8.2.18 Fluid Empty Alarm·······················································································105

8.2.19 Self-Diagnosis Function···············································································107

8.2.20 Rate-of-Change Limit Value and Control Time············································110

8.3 Initial Settings When Shipped from the Factory ·······················································112

8.4 Fixed Value Output (Loop Check) ············································································114

8.5 Zero Adjustment·······································································································118

8.5.1 Still Water Zero Adjustment ·········································································118

8.5.2 Zero Offset Adjustment················································································120

9. Mag-Prover Calibration·································································································122

9.1 Calibration Items·······································································································122

9.2 Converter Check / Calibration ··················································································123

9.2.1 0% Flow Rate Calibration (Zero Calibration)···············································123

9.2.2 50% Flow Rate Calibration··········································································124

9.2.3 100% Flow Rate Calibration (Span Calibration)··········································125

9.2.4 Checking the Exciting Current Value···························································126

10. Function Description ····································································································127

10.1 Digital I/O Specifications···························································································128

10.2 Totalizer and Pulse Output ·······················································································129

10.3 Multi-Range Functions······························································································132

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10.4 Flow Rate High/Low Limit Alarm Outp ut···································································138

10.5 Fluid Empty Alarm Output·························································································141

10.6 Preset Counter Output Function···············································································142

10.7 Remote Still Water Zero Adjustment·········································································146

10.8 Remote Selection of Fixed Value Output··································································147

10.9 Converter Error Alarm Output···················································································148

11. Communications Function··························································································149

11.1 Connection with the HHT terminal············································································149

11.2 Procedure for Communication with HHT··································································151

11.3 Cautionary Notes on Communications·····································································152

12. Diagnosis and Alarms···································································································153

12.1 Diagnostic messages ·······························································································153

12.2 Output When an Error or Alarm Occurs····································································156

13. Maintenance and Inspection·······················································································157

13.1 Maintenance·············································································································157

13.2 Troubleshooting········································································································159

13.2.1 Flow rate is not indicated·············································································159

13.2.2 Flow rate indication is not correct································································160

13.2.3 Flow rate indication is not stable ·································································161

14. Principle of Operation···································································································163

15. Specifications·················································································································164

15.1 Specifications ···········································································································164

15.2 Model Number Table································································································169

16. Outline Drawing··············································································································171

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1. Product Inspection and Storage

1.1 Product Inspection

The LF232 electromagnetic flowmeter is shipped in a cardboard box filled with cushioning materials. Open the package and check the following items:

Are the following items included?

Electromagnetic flowmeter main unit·························································1 unit Instruction manual···············································································1 copy Adjusting capacitor·························1 piece (only for large meter size specification)

Isn’t there any damage to the main unit?

Is the specification the same as when you placed an order?

If you find anything defective and unclear, contact the sales office from which you purchased the product or your nearest Toshiba representative.

The capacitor attached for large meter size specification can be used to improve the performance when combining the converter with an old type detector. This capacitor is usually not used. For details, see

5.3.1 “Cautionary Notes on Wiring between Detector and Converter”

1.2 Storage

Regarding the storage after the flowmeter is delivered and before starting installation work, be careful about the following items:

Do not leave the flowmeter in a place such as outdoors where direct sunlight hits or a place exposed

to rain and wind.

Avoid places where humidity is extremely high or the temperature is extremely high or low and

store the flowmeter in a well ventilated place.

• Humidity range: 10 to 90% RH (no condensation)

• Storage temperature range: -13 to 149 °F (-25 to 65 °C)

Store the flowmeter in a place where vibration and shock does not occur.

If the cover of the converter is left open while being stored, insulation may be deteriorated. Do no

open the cover until the time of wiring for the converter.

To place the flowmeter temporarily on the floor, use a stopper, etc. when needed to prevent it from

rolling over.

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2. Overview

The electromagnetic flowmeter is an instrument to measure the volumetric flow rate of conductive fluids using Faraday's law of electromagnetic induction.

The flowmeter consists of a detector which generates a signal of electromotive force proportional to the flow rate of the fluid and detects this signal, and a converter which converts the signal detected by the detector to a unified signal output.

Features

The electromagnetic flowmeter has features such as:

• No pressure loss by piping

• Flow measurement can be made not affected by conditions such as fluid temperature, pressure,

density and flow condition.

• It is easy to read the flow indication because a liner relation exists between the flow rate and

output signal.

The LF232 converter has additional features described below:

(1) High accuracy measurement of ±0.5% of rate can be obtained in the velocity range of 1.0ft/s to

32.8ft/s (0.3m/s to 10m/s). (Measurement range and accuracy are different by detector.)

(2) Stable measurement can be made even with fluids containing solids (sludge and slurry).

•The unique Noise-Sentry filter circuit and arithmetic logic unit (ALU) enables you to obtain a

stable output.

(3) The converter is equipped with various display and output functions.

• Various display and output functions can be easily set by switch operation.

• The converter is equipped with worldwide standard HART* protocol communication.

(4) Use of infrared switches

• Use of infrared switches allows you to perform various operations without opening the converter

housing cover.

(5) Easy-to-read liquid crystal display (16 characters × 2 lines)

• It is easy to read the indication even in a dark place by means of backlight.

* HART protocol··········“HART” stands for Highway Addressable Remote Transducer and is a

communication protocol recommended by HCF (HART communication Foundation) for industrial sensors.

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3. Names of Parts

Appearance

Mounting plate

Display section

Operation switch (Infrared switch)

Ground terminal

Cable connection for signal cable

Cable connection for output cable

Cable connection

Cable connection for excitation cable

Converter cover

Converter cover mounting screw

mounting screw

Mounting plate

Cable connection (Cap nuts) 5 pieces

Appropriate cable outer diameter: 11 to 13mm Material: Nylon resin

Material: Nylon resin

Housing side connection: G(PF) 1/2 thread

Cable connection for power cable

Cable connection for digital I/O cable

for output cable

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Internal structure (with converter cover opened)

Display section (LCD)

Operation switch (Infrared switch)

Fuse holder

Power switch

Terminal block

Protection cover

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Terminal block construction

The label shown left is placed near the terminal board for power supply on the converter.

Be alert to electric shock.

Detector connection terminals

4 20mADC current output terminals

Digital I/O terminals

Fuse holders

Power supply terminals

Power switch

Protection cover

Internal ground terminal

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4. Installation

Cautionary notes on installation

Do not use the LF232 in an

atmosphere

DON’T

Using this product in an explosive atmosphere can cause explosion.

explosive

Use an

the LF232.

appropriate device

to carry and install

If this product falls to the ground, injury, or malfunction of or damage to the product, can be caused.

Do not modify or disassemble

unnecessarily.

Modifying or disassembling this product can cause electric shock,

malfunction of or damage to this

DON’T

Do not work on piping and wiring

hands

DON’T

product.

Wet hands may result in electric shock.

the LF232

with wet

Ground equipment. Type D (100 ohm or less ground resistance)

the LF232

Operating this product without grounding can cause electric shock or malfunction.

The label shown left is placed near the terminal board for power input. (A black border and symbol on yellow triangle)

Be alert to electric shock.

independently from power

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4.1 Cautionary Notes on Selecting the Installation Location

(1) Avoid places within the immediate proximity of the equipment producing interference to

measurement (such as motors, transformers, radio transmitters, electrolytic cells, or other equipment causing electromagnetic or electrostatic interference).

(2) Avoid places where excessive vibration occurs.

(3) Avoid places where there is direct sunlight as mush as possible. If this is unavoidable, provide a

sunshade, etc.

(4) Avoid places where high corrosive atmosphere or high humidity condition exists.

(5) Avoid places of too great an elevation or constricted areas and install the flowmeter in a place

easy for necessary work.

(6) The standard length of the cable that connects the detector and the converter is 30m. Select a

converter installation location so that the distance of the detector and the converter will not exceed 30m.

(7) If direct sunlight hits the display and the operation section or if there is something nearby that

easily reflects light, this kind of light becomes disturbance light and the switch operation may not work correctly. Be careful about the installation location and angle, or take measures such as providing a sunshade or shield plate so that disturbance light does not hit the operation section directly.

Places where there is following factors.

(8)

◆Factors to impede infrared switch to operate properly

・Intense light such as direct sunlight and reflected sunlight by window glass or metal plate ・Place where brightness changes always such as ON/OFF of lighting ・Dense smoke or steam near the control panel

・Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and haze due

to their attachment

・Light reflecting object near the control panel, or reflecting object such as metal plate placed

opposing to the control panel

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4.2 How to Install the Converter

The converter can be mounted on a panel, wall or on a pipe stand. Install the converter so that the front of the converter cover stays vertically straight and the cable ports of the converter stay at the bottom. Figure 4.1 shows an example of panel and wall mounting installation and Figure 4.2 shows an example of pipe stand installation.

Unit: inch (mm)

φ0.43 (φ12) hole

2.91(74)

M10 bolt, etc.

Wall surface, etc.

φ0.43 (φ12)

(M10 mounting holes)

14.57 (370)

2.91(74)

14.57(370)

Mounting Hole Dimensions

Figure 4.1 Example of Panel and Wall Mounting

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Unit: inch (mm)

2.91 (74)

M10 U bolt, etc

14.57 (370)

2” (50A) PIPE

Figure 4.2 Example of Pipe Mounting

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5. Wiring

Cautionary notes on wiring

urn off mains power

Working on pipes while power is applied can cause electric shock.

before working on pipes.

Install a switch and fuse

from mains power.

Power supply from mains power can cause electric shock or circuit

break-down.

to isolate the LF232

Do not work on piping and wiring

hands

Wet hands may result in electric shock.

DON’T

Do not conduct wiring work

Remaining electric charge even if power is turned off can still cause

DON’T

Do not modify or disassemble

unnecessarily.

DON’T

electric shock.

Modifying or disassembling this product can cause electric shock,

malfunction of or damage to this product.

with bare hands

the LF232

with wet

Ground equipment. Type D (100 ohm or less ground resistance)

. Use

and GND terminal.

the LF232

Operating this product without grounding can cause electric shock or

malfunction.

crimped terminal lugs

Loose connections can cause electric shock, fire from excessive current or system malfunction.

The label shown left is placed near the terminal board for power input. (A black border and symbol on yellow triangle)

Be alert to electric shock.

independently from power

for the terminal board

Flowmeter performance may be affected by the way wiring is carried out. Proceed with correct wiring by observing the following items.

(1) For cable route, avoid places near electrical equipment (such as motors, transformers or radio

transmitters) which cause electromagnetic or electrostatic interference.

(2) If the converter interior or cable ends get wet or humidified, deterioration of insulation occurs and

this may cause malfunction or noise problems. Avoid a rainy day if wiring is carried out outdoors. Even indoors, make arrangements to prevent water from splashing over the converter and try to finish the wiring as quickly as possible

(3) Since the excitation cable and the flow rate signal cable carry very small signals, pass each of the

cables separately through a thick steel conduit and keep them away from large current wiring as much as possible, and do not install them in parallel.

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(4) If the converter needs to be installed in a location where watertight installation is required, make

unused cable ports watertight. (Be careful that the attached blind plate is used for dustproof purpose and it is not effective for watertight installation.)

(5) The converter has a surge arrestor/protector installed inside. Therefore, do not conduct a withstand

voltage test for the converter. In addition, to check the insulation of the converter, use a voltage of 250VDC or less.

(6) When wiring is completed, be sure to install the protection cover of the terminal block.

5.1 Installation Cables

Use the kind of cables shown in Table 5.1 to connect to the converter.

Table 5.1 Installation Cables

Name Cable name

Flow rate signal cable

Excitation cable

Power cable

Output signal cable

2-core shielded chloroprene cabtyre cable

( Rubber covered cable )

3-core chloroprene cabtyre cable

( Rubber covered cable )

3-core vinyl sheathed cable or 2-core vinyl sheathed cable

The number of insulated conductors the cable contains differs depending on the specification of the output signal cable.

Use a shielded cable of overall diameter 0.433 to 0.512 inch

(11 to 13mm) with nominal cross-sectional area of 1.25mm

Nominal cross-sectional area

0.75mm

2mm

1.25mm2

2mm2 0.433−0.512 inch

0.433−0.512 inch

Overall diameter Description

(11−13mm)

0.433−0.512 inch (11−13mm)

(11−13mm)

JIS C 3327 or equivalent

CVV JIS C 3401 or equivalent

CVV-S JCS-258-C or equivalent

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5.2 External Connections

The external connections of the converter are shown in Figure 5.1. See 5.4 “Wiring Method” to connect the cables correctly

Terminal block

IV wire 5.5mm

or more

Power cable (CVV)

Class D grounding (Ground resistance 100 or less)

Thick steel conduit

Flow rate signal cable (2-core shielded cabtyre cable)

Connected detector

Output cable (CVV-S)

Excitation cable (3-core cabtyre cable)

Input/Output cable (CVV-S)

5.1 External Wiring Connection Diagram

Power supply

Current output (4 20mADC)

Digital input 2 (option) Digital input 1 (option)

(20 30VDC)

Digital output 4 (option)

Digital output 3 (option) Digital output 2 (option)

Digital output 1

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5.3 Cautionary Notes on Wiring

5.3.1 Cautionary Notes on Wiring between Detector and Converter

• Flow rate signal cable and excitation cable are attached to the detector.

Be sure to use the attached cables.

Note: If the length of the cables exceeds 30m, the cables may not be attached. Check whether

the cables are attached or not referring to the specification.

• The allowable cable length between the detector and the converter differs depending on the

conductivity of the fluid to be measured. Refer to the Instruction Manual of the detector combined.

• The end of the attached cable to connect to the converter is covered with cap to prevent entry of

humidity. Do not remove this cap from the cable until the cable is ready to be connected to the converter.

• When you connect cables between the detector and the converter, connect the excitation cable first

and then the flow rate signal cable.

• Since the input signal cable carries very small signals, be sure to install the excitation cable and the

input signal cable in separate thick steel conduit (0.87 inch (22mm)) and separate them from other large current wiring as much as possible and do not install them in parallel. The cable connection port is G (PF) 1/2 female thread.

• The detector side of the attached cable is already connected when shipped from the factory. In

addition, since the terminal box of the detector has airtight structure, avoid removing the wired cable from the detector.

• To replace the flow rate signal cable and excitation cable, refer also to the Instruction Manual of the

detector. Before you replace these cables, place an order for packing of the detector terminal box cover as well as packing for the cable connection to Toshiba or Toshiba representative and make sure to replace these packings when you replace the cables.

5.3.2 Cautionary Notes on Wiring between Instruments and Converter

• To avoid 2-point grounding, ground the shield of the output cable at the receiving instrument side as

a rule.

• Use a grounding wire of IV wire 5.5mm

terminal is M4. In addition, do not share the grounding wire with other equipment where grounding current may flow. (An independent grounding is preferable.)

• Power cable

When a 3-core cable is used, ground the shield of the cable using the FG terminal. When a 2-core cable is used, ground the shield of the cable using the external ground terminal and make it as short as possible.

• When you replace the Toshiba LF230 flowmeter converter with this converter, be careful that the

cable connection is changed.

or more. The size of the screw for external grounding

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5.4 Wiring Method

Do not conduct wiring work when

applied

power is

Do not work on piping and wiring

hands

with wet

DON’T

Wiring while power is applied can cause electric shock.

DON’T

Wet hands may result in electric shock.

5.4.1 Terminal Treatment of Cables

Proceed as follows to treat the terminals at the converter side of the flow rate signal and excitation cable and to connect these cables to the terminal block. Use appropriate cables referring to 5.1 "Installation Cables." Attach and crimp a round type M4 insulated crimping terminal to the end of each cable.

Excitation cable

Strip the sheath from the end of each wire as shown in Figure 5.2 and attach and crimp an M4 crimping terminal with insulated sleeve to the end of each wire and then connect the crimped terminals to X and Y of the terminal block. Connect the terminal of red wire to E of the terminal block.

M4 crimped terminal

X Black

E Red

Y White

25 to 45mm

Figure 5.2 Terminal Treatment of Excitation Cable

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Connecting the input signal cable

Strip the sheath from the end of each wire of a 2-core individually shielded cable as shown in Figure 5.3 and attach and crimp an M4 crimping terminal with insulating sleeve to the end of each wire. Connect the crimped terminals to the A and B terminals of the terminal block. Twist the shields of the two wires and cover them with a thermal contraction tube or vinyl tube so that the shields do not make contact with the case or the core wires. Then attach and crimp an M4 crimping terminal with insulated sleeve to the end of the twisted shields. Connect the crimped terminal to the G terminal of the detector and the converter.

Thermal contraction tube or vinyl tube

M4 crimped terminal

A Black

G Sealed

B White

25 to 45mm

Figure 5.3 Terminal Treatment of Flow Rate Signal Cable

Cautionary notes on terminal treatment for shields of the signal cable

• When stripping external sheath, intermediate and insulation sheath, be careful not to scratch or cut

the internal conductors and the shield mesh.

• Do not unravel the shield mesh and treat it as shown in Figure 5.4.

Figure 5.4 How to Treat the Shield Mesh of Signal Cable

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Power cable, current output cable and digital I/O cables

Necessary cables should be purchased and prepared by the agent in charge of installation.

Strip the sheath from the end of each wire and attach and crimp an M4 crimping terminal with insulated sleeve to the end of each wire.

• Connect the power cable terminals to L1 and L2 of the terminal block.

• Connect the current output cable terminals to (+) and (−) of the terminal block.

• Connect the digital I/O cable terminals to the required terminals among the terminals of DI, DO1

− CO1, (CO2 to DO4) − CO2, (DI1, DI2) − CI.

M4 crimped terminal

25 to 45mm

Figure 5.5

Terminal Treatment of Power Cable, Current Output Cable and Digital I/O Cables

5.4.2 Cable Connection

Connect and install the terminal-treated cables to the terminal block in the procedure below.

* Connect the cables to the terminal block securely. A loose connection may cause incorrect

measurement. After connecting each cable, try to pull it to check whether it has been connected securely.

Remove the cap nut for tightening the cable connection and attach the removed cap nut, seal ring and packing onto the terminal-treated cable in this order and then lead the cable into the converter.

(The blind plate is used for dustproof protection during storage. Remove it when connecting a cable because it is not needed.)

Figure 5.6 Cable Connection

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Referring to 5.2 "External Connections," connect each cable to the terminal block. Tighten the screws of the terminal block tightly to make them securely connected. A loose connection may cause incorrect measurement. After connecting each cable, try to pull it to check whether it has been connected securely.

Phillips screwdriver

* The appropriate torque

for tightening the terminal block screw is 1.2 N m

Terminal block

Figure 5.7 Connection to Terminal Block

After connecting the cables to the terminal block, take up the slack of the cables and tighten the cap nut.

At this time, be careful that if the sheath-removed portion of the cable comes to the packing area, air tightness may not be kept.

Cable connection

Cap nut for tightening

Cable

Packing

Correct

Cable connection

Incorrect

Because the contact surface of the cable and the packing is small, air tightness may not be kept.

Figure 5.8 Cable Tightening

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5.4.3 Grounding

The external ground terminal of the detector and the FG terminal of the converter (or external ground terminal of the converter) must be grounded securely with Class D grounding (grounding resistance 100Ω or less). Use an IV wire 5.5mm

In addition, do not share the grounding wire with other equipment where grounding current may flow. (An independent grounding is preferable.)

If it is difficult to carry out grounding work at the detector side due to a pit installation or other reasons, use a 3-core cable for the excitation cable and connect the E terminal of the detector to the E terminal or other reasons as shown in Figure 5.9(b), of the converter. (The E terminal of the converter is internally connected to the FG terminal and the converter housing.)

or more for grounding wire.

Converter terminal block

External ground terminal

Twisting shields

Input signal cable

Twisting shields

ABX

GEY FG

Class D grounding (Ground resistance 100 or less)

Excitation cable

ABXGY

Detector terminal block

Ground terminal

Class D ground (Ground resistance 100 or less)

Figure 5.9(a) Wiring between Detector and Converter

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Converter terminal block

External ground terminal

Twisting shields

Input signal cable

Twisting shields

ABX

GEY FG

Class D grounding (Ground resistance 100 or less)

Excitation cable

ABXGY

Detector terminal block

Ground terminal

Figure 5.9 (b) Wiring between Detector and Converter (when grounding for detector is

difficult)

Ground terminal

Grounding wire

When piping material is conductive

Connect the grounding wires to both ends of the piping flange.

Conductive material pipe Example: Metal, etc.

Non-conductive material pipe Example: Resin pipe or metal pipe which

is internally coated with resin

When piping material is non-conductive

Carry out class D grounding work (grounding resistance 100 or less).

Figure 5.10 Detector Grounding Method

Ground terminal

Grounding wire

Class D ground (Ground resistance 100 or less)

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5.5 Digital I/O Connections

Digital I/O terminals consist of four contact output terminals (DO1 to DO4) and two voltage signal input terminals (DI1 and DI2), and each terminal is isolated from internal circuits.

The terminal CO2 is the signal common for DO2 to DO4 and the terminal CI is the signal common for DI1 and DI2. For details, see 10. “Function Description.”

The function of each terminal can be selected by settings.

For details, see 10. “Function Description.”

To drive an electromagnetic relay or electromagnetic counter using a digital output, connect a surge-absorbing diode into the input circuit of the relay or the counter. Figure 5.11 shows a connection example.

Solid-state contact (Option)

Photo-coupler (Option)

Resistor (Option)

CI DI

DC power supply 24VDC

* Note 1 Use a surge-absorbing diode of rated current 1A and rated withstand voltage 200 V minimum.

* Note 2 In the case of standard specification (without Digital I/O), the solid-state contact, photo-coupler and

resistor are not built in. Leave DO2 to DO4, CO2, DI, DI2 and CI unconnected.

DO2 to DO4

Transistor open collector (Standard)

Converter inside

DO1CO2CO1

* Note 1 Surge absorbing diode

Electromagnetic counter

Figure 5.11 Connection Example of Electromagnetic Counter

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