Toshiba L5232 User Manual

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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.

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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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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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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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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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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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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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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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6F8A0917

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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6F8A0917

(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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5.6 Cautionary Notes on Replacing Converter

5.6.1 Replacing the LF230 Converter

The following precautions must be taken to replace the conventional type LF230 with LF232.

Installation

• Since the hole diameter and pitch for mounting fitting, and the dimensions of the LF232 converter

main unit are the same as those of the LF230 converter, it is possible to replace the converter without changing the mounting panel, installation space, etc.

• The operation switches of the LF232 are infrared switches. 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.

Wiring

• The positions of the LF232 cable ports are the same as those of the LF230.

• The specifications of the cable ports differ as shown in the table below.

Table 5.2 Comparison of Cable Port Specifications

LF230 LF232

Ports on the housing

Attached cable connection specifications

Conduit connection port R (PT) 1/2 male thread Not provided

Blind plate (seal plate)

Material Stainless steel Nylon resin

Waterproof grade IP67 IP67

Appropriate cable diameter

M27 fine pitch thread Depth 0.433 inch (11mm)

Excitation and DI/DO cables φ0.433−0.512 inch

(φ11−13mm)

Other cables φ0.394−0.472 inch

(φ10−12mm)

Waterproof blind plate attached

G1/2 Depth 0.433 inch (11mm)

φ0.433−0.512 inch (φ11−13mm)

Dustproof blind plate attached * (Note)

Note: The blind plate is not a waterproof type. If it is necessary to install the converter where waterproof

structure is needed, take waterproof measures for unused cable ports such as using sealing plugs sold on the market.

• Since the terminal block specification of the LF232 is M4 screws, the same as that of the LF230, it is

possible to connect the cables without changing the cable terminals.

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

When the LF232 flowmeter converter (LF232*B for large meter size) is combined with an existing detector of commercial power excitation method, the excitation current may not become stable because of the difference of the excitation method.

(Example of symptoms)

• When the excitation current is checked in the CAL mode, the excitation current is not displayed exactly as set

for the converter.

• The indicated value of the excitation current does not stabilize in the CAL mode and the minimum digit cannot

be read.

• The zero point of flow rate at the time of still water measurement is not stable.

If this happens, connect an adjusting capacitor provided for the detector (only for large meter size) between the terminals X and Y of the terminal block for converter cable as shown below.

This capacitor is not needed if you combine with a detector of square-wave excitation method (guideline date: manufacture date is 1981 or later).

In addition, if the symptom does not improve when the capacitor is connected, stop using the capacitor.

Connect an attached capacitor between the terminals X and Y.

Note: If any symptom described above does not occur when connected

with an existing detector, do not connect this capacitor.

Figure 5.12 How to Connect an Adjusting Capacitor

Terminal block

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5.6.3 Replacement of partially filled pipes type

When detector of partially filled pipes type is replaced from LF502 or LF502(FS2 type) to LF232*F, please be careful to the following points.

• Installing

In the case of replacement from LF502(FS2 type): The diameter of hole, width of installation metal fittings of LF232, an external size of the body of converter are the same. In the installation panel processing, the built-in space, a change is unnecessary.

Because switch of LF232 is the infrared switch, please avoid a place with the following factor.

◆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 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.

Table 5.3 Case specifications comparison list (Partially filled pipes type)

Model LF502 LF502 (FS2 type) LF232*F Width of installation （W×H） Size of body（W×H×L）（Note）

Note: Cable ground, installation metal fittings are removed from height.

32 -

220×200 74×370

325×426×264 234.5×370×150

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• Wirering

・ Hole position of cable connection mouth of LF232* F is the same as LF502 (type FS2). ・ Because specifications of cable connection mouth are different in the following points,

Please be careful.

Table 5.4 Cable connection mouth specification comparison list

(Partially filled pipes type)

Model LF502 LF502 (type FS2) LF232*F

Joint of case side (Please use only an

attached cable ground)

specifications of

attached cable

ground

Materials Stainless steel Stainless steel Nylon resin

Grade of waterproofing

Diameter of conformity

cable

Joint of conduit Rc（PT）3/4 male screw R(PT)1/2 male screw None

IP67 IP67

Excitation, optional

cable

φ0.433～0.512 inch

(φ11～13mm)

Others

φ0.394～0.472 inch

(φ10～12mm)

M27 slim screw

Depth 0.433 inch (11mm)

Excitation, DI/DO

cable

φ0.433～0.512 inch

(φ11～13mm)

Others

φ0.394～0.472 inch

(φ10～12mm)

G1/2

Depth 0.433 inch (11mm)

IP67

φ0.433～0.512 inch

(φ11～13mm)

Blind Attached waterproofing

blind

Attached waterproofing

blind

Attached protection

against dust blind

(Note)

(Note) There is not waterproofing of a blind. When converter needs waterproofing, please set

waterproof the cable connection mouth.

Terminal block specifications of LF232 are M4 screw terminals same as LF502. Change of terminal processing of cable is unnecessary.

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6. Operation

Do not touch the LF232 main body when

temperature fluid

DON’T

For operation, follow the procedure described below.

Inspection for each part

is being measured.

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

Is the wiring and connection between the detector and converter correct?

Is the wiring between the converter and related instruments correct?

Isn’t tightening of connection between the detector and the mating pipe

forgotten?

high

Introducing water

Applying power supply

Is the power supply as specified?

Checking the converter settings

Zero adjustment

Is the direction of arrow of the detector in accordance with the direction of

actual fluid?

Are the detector and the converter grounded securely?

Is the converter cover securely tightened?

Check the items above.

Let the fluid go through and fill the detector pipe. (Note)

When the detector pipe is filled with fluid, stop the fluid and keep it still.

In the case of the flowmeter which is partially filled pipes type, please let a fluid stand still at water level high as possible more than water level 30%.

* See 7. “Display and Controls,” 8. “Parameter Settings/Adjustment,” and 11. “Communications Function.”

Wait for 30 minutes to warm up the flowmeter. Then perform zero adjustment. (Check that the fluid remains still) * See 8.5.1 “Still Water Zero Adjustment.”

Operation

After checking the items and performing adjustment listed above, let the fluid go through the detector pipe. Then the outputs such as current output (4 to 20mADC) directly proportional to the flow rate can be obtained.

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Note: If the fluid to be measured is not filled in the detector pipe (When detector is partially

filled pipes type, water level is not enough), flow rate becomes inconsistent and measurement cannot be performed correctly.

Be sure to use the flowmeter while the fluid to be measured is filled in the detector pipe.

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7. Display and Controls

For the LF232 converter, the measured value can be displayed and the parameters can be checked or set using the LCD display and operation switches.

The operation switches are non-contact type (infrared method) and can be operated without opening the converter cover (operable also while the cover is opened).

Observe the following precautions when you open the converter cover:

• Do not allow the converter exposed to rain and wind.

Adjustment in the rain may cause damage to the parts and may cause electric shock and it is very dangerous. In addition, if wind-blown dust enters the electronic circuits in the converter, this may cause malfunction of the converter.

• Do not open the converter cover under high humidity condition

Opening the converter cover under high humidity condition can cause deterioration of system accuracy or cause damage to the flowmeter parts.

Display and controls

(Cover Closed Condition) (Cover Opened Condition)

Figure 7.1 Display and Controls

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7.1 Names and Functions of Display and Controls

Display

Operation switch (Infrared switch)

Figure 7.2 Display and Controls

LCD display

A 16-character × 2-line liquid crystal display with backlight is used.

Instantaneous flow rate and total flow, and various constants such as parameters can be displayed. In addition, the backlight is always lit and data can be read clearly even in a dark place.

Operation switch (infrared switch)

Operation switches are infrared switches and the operation can be carried out without opening the housing cover and operable also with the cover opened.

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Instructions

The operation principle of infrared switch is to irradiate infrared to the front of control panel and detect the reflection from finger when operating.

Normal operation is impeded depending on the conditions such as disturbing light from surroundings or stain attached to the control panel. When unable to avoid such condition, operate the EMF converter in the following manner. Remove the factor to impede proper operation of infrared switch as below:

・ Cover the control panel by hand so that light does not shine on it ・ Clean the stain attached on the control panel ・ Clean the stain on the finger or the gloves to operate the EMF

converter, or wear gloves in light color

・ When there is a reflecting object placed opposing to the control panel,

stand in-between the reflecting object and the control panel to block the light

Following are considered as the 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

・ Operation of the control panel by hands wearing gloves in dark color

or stained fingers and gloves

・ Light reflecting object near the control panel, or reflecting object such

as metal plate placed opposing to the control panel

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Functions of each switch

Switch Basic function

• Moves the mode from the measurement mode to menu display

10.00 m/s

100.0 %

ENTER 111 000

(*note)

(Measurement mode) (Menu lock cancellation screen)

• Moves the mode to the setting, calibration or measurement mode

1:EX CURR

(Menu display) (Setting mode)

A1:EX CURR

0.2100A

• Writes data in the setting mode.

B1:UNIT 1 %

(Data being changed) (Data has been changed)

B1:UNIT 1 %

• Changes the numeric value or items in menu display and in the setting,

calibration or measurement mode.

C2:RANGE 1

02.000 m/s

(Data 0.2000m/s) (Data 0.3000m/s)

C2:RANGE 1 03

.000 m/s

• Starts or stops the totalizer (total value and pulse output) in the totalizer control

mode.

COUNT CTRL F 1000 m

(Count stops) (Count starts)

• Enables the converter to change the setting value in the setting or calibration

mode and the cursor appears.

D1: DAMPING

00.5 S

(Setting mode) (

D1: DAMPING 0

0.5 S

Enabled to change the setting value

)

• Moves the cursor (digit) in menu display and in the setting mode

G1: COUNT RATE 1

.23E-4 m3

G1: COUNT RATE

1.2

3E-4 m3

(Cursor at the position of “1”) (Cursor at the position of “2”)

• Resets the totalizer (total value) in the totalizer control mode

COUNT CTRL F 1000 m

(Counter in operaiton) (Resets the counter)

COUNT CTRL F 0 m

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Note : There is not this screen to the converter before serial No.072320999. ( Menu screen is displayed. Menu lock cancellation screen is not displayed. )

Switch Basic function

• Returns the screen from the parameter display screen to the menu display

screen.

• Returns the screen from the parameter input screen (Cursor ON) or

adjustment wait screen to the parameter display screen.

• Cancels the parameter input check screen (screen blinks) and returns to the

parameter input screen.

• If pressed while menu display screen is displayed, Function [MEAS MODE]

to return to the measurement mode appears. (If MENU/ENT is pressed under that condition, the mode returns to the measurement mode.)

7.2 Display Format

In the measurement mode, the measured data is displayed in the unit set by UNIT 1 and UNIT 2 in the setting mode. (To set the unit, see 8.2.6 " Normal Indicating Unit ")

Displayed in the unit set by UNIT 1

In the case of total count display, “C” appears while counting is in progress.

While communication is in progress, “ ” appears.

Displayed in the unit set by UNIT 2

Measured value display format

(1) Flow velocity value and instantaneous flow rate display

4 significant digits (for the span flow rate)

- 1 0 . 0 0 m l / s

Flow unit

Time unit

Numeric value is indicated in 7 digits including a decimal point. (Up to 9999999)

Flow direction: Forward direction “ ” (blank)

Reverse direction “ − ”

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(2) Total count display

F 9 9 9 9 9 9 9 9 C

“C” is displayed when counting is in progress.

(3) Total flow value display

F 9 9 9 . 9 9 m l C

“C” is displayed when counting is in progress.

Flow unit

Total value is displayed in the unit of count When the count exceeds the maximum value of 99999999, the count will be reset to 0 and will be counted again.

In the case of forward flow count, “F” is displayed. In the case of reverse flow count, “R” is displayed.

Displayed to the least significant digit of the set pulse rate.

Numeric value is indicated in 8 digits including a decimal point. (Total valve is displayed up to 99999999, and when the total count exceeds the maximum value of 99999999, the total valve will be reset to 0 and will be counted again.)

In the case of forward flow count, “F” is displayed. In the case of reverse flow count, “R” is displayed.

(4) Total difference flow value display

+ 9 9 9 . 9 9 m l C

“C” is displayed when counting is in progress.

Flow unit

Displayed to the least significant digit of the set pulse rate.

Numeric value is indicated up to 8 digits including a decimal point.

If forward flow count ≧ reverse flow count, “+” is displayed. If reverse flow count › forward flow count, “−” is displayed.

For total difference flow value, the difference between the forward direction value and the reverse direction value is displayed.

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→

Notes on total flow value display

Note 1: The total flow value and the total difference flow value are displayed to the least

significant digit of the set count rate. Example: When the set count rate is 0.0001 m

Total flow / total difference flow display becomes increases in increments of 0.0001 m3. If the value reaches next count. In the end, the display becomes

When the set count rate is 10 m The display becomes 10 m3.

Note 2: In the case of total difference flow display, if the forward direction total flow value or

reverse direction total flow value exceeds 9,999,999, only the total value that exceeded 9,999,999 will be reset to 0 and the count continues.

Example: When the forward direction value returns to zero after it reaches the

maximum value

Forward direction:1000 Reverse direction:− 100 Flow difference: 900

* In an example shown above, if the forward direction flow value is reset to zero

after reaching 99999999, flow difference indication changes from 99999899 to

−100 and the count continues.

(5) Percent display

Displayed to one decimal place (0.1%).

- 1 0 0 . 0 %

Up to 125.0% is displayed.

(6) Custom unit display

Forward direction: 99999999 Reverse direction: − 100 Flow difference: 99999999

and the value

, the display changes to at the

and the value increases in increments of

Forward direction: 0 Reverse direction:− 100 Flow difference: − 100

Flow direction: Forward direction “ ” (blank)

Reverse direction “ − ”

- 1 0 . 0 T E S T 1 2 3

Unit can be displayed up to 7 digits.

Value is indicated in 8 digits including a decimal point. (Up to 9999999) 4 significant digits: m coefficient

Flow direction: Forward direction “ ” (blank)

/min value multiplied by the set

Reverse direction ” − ”

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(7) Error message / other message display

E X C U R R E N T O P E N

If an error or alarm condition occurs, a message is displayed in the 2nd line.

(8) Fixed output display

* F I X O U T 2 0 . 0 m A

In the fixed output mode, a message is displayed in the 2nd line.

7.3 Basic Operations (

7.3.1 Mode Switching

(1) Types of mode

The following operation modes are provided in the LF232 converter and they can be changed by operation switches.

• Measurement mode: This is the mode used at the time of flow measurement

The process value is displayed and output. The flowmeter first goes to this mode when power is turned on.

• Totalizer operation mode: Totalizer can be started, stopped and reset.

For output, the process value is output in the same way as in the measurement mode. For details, see 7.3.4 “Totalizer Operation.”

• Setting mode: This is the mode to check or set various parameters.

Parameters can be selected from function menu. Though various parameters are shown on the display, the process value is output in the same way as in the measurement mode. For details, see 8.2 “Parameter Check/Change.”

The following mode can also be selected using menu in the setting mode.

• Fixed value output mode (loop check): This is the mode in which 4 to 20mA output and the

Mode Switching, Setting Mode Operation, Total Counter Operation

totalizer pulse output frequency can be fixed to a preset value. For details, see 8.4 “Fixed Value Output (Loop Check).”

)

• Zero adjustment mode: This is the mode in which zero adjustment can be performed.

The process value is output in the same way as in the measurement mode. For details, see 8.5 “Zero Adjustment.”

• Calibration mode: This is the mode to check the circuits of the converter unit.

Zero point and span can be checked using the internal generator circuit that generates simulation signals. Excitation current can also be checked. The current output becomes the value corresponding to the simulation signal. For digital output, the last value before entering the calibration mode will be held. For details, see 9. “Mag-Prover Calibration.”

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(2) Mode switching operation flow

Æ.

CANCEL

shown in the flow diagram below indicate the switch

Not [111]

MENU/ENT

, , and operations and when the indicated switch is pressed, the process moves to the item indicated by the corresponding arrow

Measurement mode

10.00 m/s

100.0 %

Press longer for 3 seconds.

*(Note 1)

*(Note 3)

Input [111]

*(Note 2) Mode Selection Screen

(Point the cursor (>) to SET.)

*(Note 2) Setting mode (Menu display)

ENTER111

>1:SET 2:CNT CTRL

000 V****

A 1:EX CURRENT

A1:EX CURRENT

A2:METER SIZE

Totalizer operation mode

COUNT CTRL F 1000 m 3

(Point the cursor (>) to CNT CNTRL.)

(Set “0” to the 1st digit of the function code and press MENU/ENT)

1:MANUAL ZERO

A0:MEAS MODE

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Note 1: If password is set, the password selection screen appears.

For details, see 7.3.3, “Password Input.”

Note 2: If no operation is performed

setting mode menu screen is displayed, the screen returns to the measurement screen

Note 3: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

for one minute while the mode selection screen or the

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7.3.2 Setting Mode Operation

Proceed as follows to select the desired item and check or change the setting values.

* Switch operation indicates the switches to press.

Moving to the menu display

Switch operation Display example Description

Note1

−

10.00 m/s

100.0 %

ENTER111 0

ENTER111 111

>1:SET 2:CNT CTRL

1:EX CURRENT

00 V****

V****

Measured value being displayed (measurement mode)

Pressing or more, the screen moves to the menu lock cancellation screen. * Pressing returns to the measurement mode.

Set the menu lock cancellation cord [111] by pressing

* Pressing returns to the measurement mode.

Pressing or more, the screen moves to the mode selection screen.

Select 1:SET in the mode selection screen and press

MENU/ENT

* Pressing

returns to the measurement mode.

MENU/ENT

CANCEL

and .

CANCEL

MENU/ENT

. Then the menu screen appears.

CANCEL

in the measurement mode for 3 seconds

in the mode selection screen, the mode

in the measurement mode for 3 seconds

in the mode selection screen, the mode

, the function number (a combination of a letter

moves the cursor to the digit of letter.

and .

1:UNIT 1

:UNIT 1

:RANGE 1

Pressing and a number) changes.

Pressing , the cursor moves.

* If the cursor is positioned at the digit of number, pressing

Likewise, set the function number to the one you want to check or change by pressing

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To return from the menu display to the measurement mode

Switch operation Display example Description

C0: MEAS MODE

10.00 m/s

100.0 %

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

Note2:Pressing

Then pressing minimum operations.

CANCEL

MENU/ENT

changes the digit of number to “0” (*0:MEAS MODE).

under that condition brings you back to the measurement mode with

Set the digit of number for function number to “0” by pressing

and (Note2). The digit of letter can be set to any letter.

The mode returns to the measurement mode (measured value display screen).

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Checking or changing the setting values

Switch operation Display example Description

Menu display

: RANGE 1

C2: RANGE 1

2.00000 m/s

Select the desired item to check or change using C2 (RANGE 1) in this example.

MENU/ENT

Press The cursor disappears and the currently set value appears for you to check. Pressing you back to the previous screen.

to decide the item to check or change.

CANCEL

under this condition brings

and .

C2: RANGE 1 2

.00000 m/s

C2: RANGE 1

.00000 m/s

C2: RANGE 1

3.0

000 m/s

C2: RANGE 1 5

.00000 m/s

C2: RANGE 1

5.00000 m/s

Pressing and enables the set value to be changed. Pressing and the screen returns to the setting value check screen (previous screen).

Setting value changeable condition Pressing * If the cursor is positioned at the unit, pressing unit to the next unit.

Pressing

Press In this example, set the value to 5.000m/s.

Pressing temporarily set and the entire data blinks.

, the cursor appears at the position of the set value

CANCEL

, the setting value increases.

, the cursor moves to the next digit.

and to change the setting value.

MENU/ENT

under this condition, the cursor disappears

moves the

changes to the condition that data is

( )

C2: RANGE 1 2

.00000 m/s

C2: RANGE 1

5.00000 m/s

: RANGE 1

If you want to cancel the data change such as when the temporarily set data has an error, press temporarily set data returns to the previously set value and the screen returns to the setting value changeable condition.

48 -

MENU/ENT

CANCEL

confirms the data and the changed data

returns you to the menu screen.

Pressing appears.

Pressing

CANCEL

and then the

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7.3.3 Password Input

The password function is provided in the LF232 converter to prevent some functions that affect the flow measurement from being used or adjusted. If password is set, totalizer cannot be reset.

For the setting menu limited by the password, see 7.4 “Setting Menu List.”

In addition, for how to set password, see 8.2.5 “Password Setting.”

Mode switching flow when password is set

If password is set, when the mode moves from the measurement mode to the menu screen, the password input screen appears.

10.00 m/s

100.0 %

[CANCEL] or Code is not [111]

*Note1

Press longer for 3 seconds.

ENTER111

000

INPUT PASSWORD

000

>1:SET 2:CNT CTRL

(Setting the cursor (>) to SET and press MENU/SET)

V****

Input [111]

(Setting the cursor (>) to CNT CNTRL and press MENU/ENT)

Cancellation cord input

Password input

A1:EX CURRENT

COUNT CTRL F 1000 m 3

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

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Example of password input (mode selection: SET and password: 123)

Switch operation Display example Description

The password input screen appears from the measurement

INPUT PASSWORD 0

mode. The cursor appears. Pressing screen.

CANCEL

, the screen returns to the mode selection

INPUT PASSWORD 1

INPUT PASSWORD 100 120 123

INPUT PASSWORD 123

>1:SET 2:CNT CTRL

Press

Change the number. To change the number of other digit, press cursor to that digit and press Repeat this operation until 123 appears on the screen.

The display blinks and the set value is displayed for conformation. Pressing

Regardless of whether the password input is correct or not, the screen changes to the mode selection screen. However, if the password input is erroneous, the setting value cannot be changed and calibration cannot be performed.

to change the value to 1.

MENU/ENT

again, the password will be written.

to move the

to change the number there.

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7.3.4 Totalizer Operation

In the totalizer operation mode, the totalizer can be started, stopped and reset.

If password is set (if password input does not match), the totalizer can be started or stopped but it cannot be reset.

Note: To operate the totalizer, it is necessary to set necessary settings for the totalizer.

For details of how to set necessary settings for the totalizer, see 10. “Function Description.”

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Example of totalizer operation

Switch operation Display example Description

Note1

−

10.00 m/s

100.0%

ENTER111 0

ENTER111 111

>1:SET 2:CNT CTRL

1:SET >2:CNT CTRL

00 V****

V****

(Measurement mode)

Pressing or more, the screen moves to the menu lock cancellation screen. * Pressing returns to the measurement mode.

Set the menu lock cancellation cord [111] by pressing

* Pressing returns to the measurement mode.

Press

Select

MENU/ENT

CANCEL

and .

CANCEL

MENU/ENT

CANCEL

in the measurement mode for 3 seconds

in the mode selection screen, the mode

longer for 3 seconds.

in the mode selection screen.

COUNT CTRL F 1000 m3

COUNT CTRL F 1000 m3 C

COUNT CTRL F 1000 m3

COUNT CTRL F 0 m3

10.00 m/s

100.0 %

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

The totalizer operation screen appears.

Pressing * “C” mark appears indicating that the totalizer has started.

Pressing stops. * “C” mark disappears.

Pressing * If the totalizer is reset, the count value cannot be returned to

the previous value.

Pressing

when the totalizer is stopped, the totalizer starts.

while the totalizer is in operation, the totalizer

, the totalizer will be reset to zero.

CANCEL

returns you to the measurement mode.

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7.3.5 Maintenance Menu

If you enter the service code to release the protection, the maintenance specific items in the setting mode that are not displayed normally can be accessed and the parameters that are normally prohibited to be rewritten can be changed.

This function is mainly used by service personnel, it is not necessary for general customers to enter this function.

If erroneously operated and the service code input screen appears, either press [CANCEL] to return to the measurement mode or press [MENU/ENT] to go on to the setting menu. (In this case, protection will not be released.)

Example to move to the maintenance menu

Switch operation Display example Description

Note1

−

10.00 m/s

100.0 %

ENTER111 0

ENTER111 111

>1:SET 2:CNT CTRL

INPUT SRV_CODE 0

00 V****

V****

Measured value being displayed (measurement mode)

Pressing or more, the screen moves to the menu lock cancellation screen. * Pressing returns to the measurement mode.

Set the menu lock cancellation cord [111] by pressing

* Pressing returns to the measurement mode.

Pressing measurement mode, the screen moves to the mode selection screen.

Select 1:SET in the mode selection screen and press

MENU/ENT

that is used to enter the service code to release the protection. Pressing back to the measurement mode.

MENU/ENT

CANCEL

and .

CANCEL

MENU/ENT

for 5 seconds or more, then the screen appears

CANCEL

in the measurement mode for 3 seconds

in the mode selection screen, the mode

for 3 seconds or more in the

in the mode selection screen brings you

1:EX CURR

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

Enter the service code and if it is correct, the maintenance specific items in the setting menu can be accessed. Pressing back to the mode selection screen.

CANCEL

in the service code input screen brings you

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7.4 Setting Menu List

The constants set in the LF232 converter can be checked or changed in the order shown in the table below.

The details of each item are described in the following sections:

• Setting items (A to M): Chapter 8. “Parameter Settings / Adjustment”

• Calibration item (N): Chapter 9. “Mag-Prover Calibration”

0 1 2 3 4 5 6 7 8

Exciting current setting *1

Main display unit

Range type *1 Range 1 *1 Range 2 *1 Range 3 *1 Range 4 *1 Hysteresis *1

Damping constant

Still water zero adjustment

Digital output 1 *1

Digital input 1 *1

Count rate *1 Pulse width

Preset count

value *1

High limit

alarm On/Off

Return to measurement mode

High high limit alarm On/Off *1

Fluid empty alarm *1

Rate-of-chang e limit

Fixed value output *1

Zero offset

0% Flow value calibration *1

Meter size *1 Exciting

frequency *1

Sub display unit

Low cutoff value

Digital output 2 *1

Digital input 2 *1

setting mode *1

Preset output setting *1

High limit value setting *1

High high limit value setting *1

Self-diagnosis On/Off *1

Control time

Fixed current *1

50% Flow value calibration

Custom coefficient *1

Current output setting for alarm *1

Digital output 3 *1

DI1 control signal level setting *1

Pulse width *1

Low limit alarm On/Off *1

Low low limit value On/Off *1

Alarm output preset *1

Fixed pulse *1

100% Flow value calibration *1

Flow direction setting *1

Custom unit *1

Display low cut On/Off

Digital output 4 *1

DI2 control signal level setting *1

Low limit value setting *1

Low low limit value setting *1

Exciting current monitor

Password *1

Output low limit setting *1

DO1 alarm output state *1

DO2 alarm output state *1

DO3 alarm output state *1

DO4 alarm output state *1

Note 1: For items marked by *1 in the table above, if you enter a wrong password, you can check the setting value but

you cannot change or adjust the setting value.

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8. Parameter Settings / Adjustment

8.1 Parameter Setting Items

To check or change each constant set in the LF232 converter, first select the desired setting item described in 7.3.2, “Setting Mode Operation.”

For setting mode items, follow the explanation below to perform the settings.

No. Setting item Display example

8.2.1 Exciting current value

8.2.2 Meter size

8.2.3 Exciting frequency

8.2.4 Flow direction

8.2.5 Password setting

8.2.6 Normal display unit

8.2.7 Custom unit setting

Range type

8.2.8

8.2.9 Damping constant

8.2.10 Low cutoff value

8.2.11 Current output setting for alarm

8.2.12 Display low cut On/Off

8.2.13 Output low limit setting

Span value Hysteresis

A1: EX CURR 0.2100 A

A2: METER SIZE 50 mm

A3: EX FREQ 24 Hz

A4: FLOW DIRCTN 1:NORMAL

A5: PASSWORD 123

B1: UNIT 1 m3/h

B3: CUSTOM DATA B4: CUSTOM UNIT

C1: RANGE TYPE C2: RANGE 1 C6: RANGE HYST

D1: DAMPING 05.0 s

D2: LOW CUT 05.0 %

D3: ALM mA SET 2: 4.0mA

D4: DSP LOW CUT 1: ON

D5: LOW LIMIT 1: 4.0mA

12340.00 TEST123

1:SINGLE

01.000 m3/h

05.0 %

8.5.1 Still water zero adjustment

Digital output function Alarm output state

8.2.14 Digital input function Control signal level setting

Count rate

8.2.15

Pulse width mode Pulse width

E1: ZERO ADJUST 0.1 %

F1: DO1 FUNCT F5: DO1 ALM STS

G1: DI1 FUNCTN G3: DI1 DET LV

H1: COUNT RATE H2: PLS MODE H3: PLS WIDTH

55 -

1:HIGH ALM 1:NORMAL CLOSE

2:CNT STA/STP 2:H LEVEL

1.00000 m3 1:AUTO 020 ms

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No. Setting item Display example

8.2.16

8.2.17

8.2.18 Fluid empty alarm

8.2.19

8.2.20

8.4 Fixed value output (Loop check)

8.5.2 Zero offset adjustment

Preset count value Output function setting

High/Low limit alarm On/Off High/Low limit alarm value

High high/Low low limit alarm On/Off High high/Low low limit alarm value

Self-diagnosis On/Off

Alarm output factor setting

Rate-of-change limit value Control time

I1: PRESET CNT I2: PRESET FNC

J1: H ALM SET J2: H ALM VAL

K1: HH ALM SET K2: HH ALM VAL

L1: EMPTY ALM 1:NORMAL

L2: SELF CHECK 1:ON

L3: ALM PRESET 1:WITHOUT EMP

M1: LIMIT RATE M2: LIMIT TIME

N1: FIXED OUT N2: FIXED CURR N3: FIXED PULSE

O1: MANUAL ZERO -000.1 %

00009000 1:HOLD

1:ON +100.0 %

1:ON +110.0 %

05.5 % 01 s

OFF

20.0 mA 1000 pps

8.2 Parameters Check / Change

8.2.1 Exciting Current Value

The exciting current value is already adjusted when the product is shipped from the factory. Normally the exciting current value is set to the same value as described on the detector nameplate.

Checking the exciting current value

Proceed as follows to check or change the exciting current value.

Switch operation Display example Description

A1: EX. CURR.

0.2100A

1: EX. CURR.

Select A1: EX. CURR. from the setting item selection menu. The currently set exciting current value appears.

Returns to the menu of setting item selection.

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Changing the exciting current value

To chang e the exciting current value, proceed as follows. However, the exciting current value is already adjusted when the product is shipped from the factory. Do not change the exciting current val ue unless the value is different from the one described on the detector nameplate. If you change this value to other value, this may cause an error.

The following is an example to change the exciting current value from 0.1900A to 0.2150A.

Switch operation Display example Description

Select A1:EX. CURR. from the setting item selection menu. The currently set exciting current value (0.1900A in this example) appears.

The cursor appears. Press

Change the number of the digit. To change the number of other digit, press cursor to that digit and change the number there. Repeat this operation until 0.2150A appears on the display.

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

further to move the cursor to the desired digit.

to move the

MENU/ENT

again to write the data. Then the cursor

A1: EX. CURR.

0.1900A

A1: EX. CURR.

0.1900A

A1: EX. CURR.

0.2

0.21

0.215

A1: EX. CURR.

0.2150A

1: EX. CURR.

900A

00A

Note: Set the exciting current value within the range shown below:

• For small and medium meter size detectors (LF232*A) 0.0500A to 0.2300A

• For large meter size detectors (LF232*B) 0.0500A to 3.000A

• For partially filled pipes detectors (LF232*F) 0.0500A to 1.500A

If you set an exciting current value outside of the settable range, a message such as *H. OVER SPEC. appears and the value returns to the previous value. Try to set a new value again.

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8.2.2 Meter Size

Checking the meter size of the detector

Proceed as follows to check or change the meter size of the detector.

Switch operation Display example Description

6F8A0917

A2: METER SIZE 50 mm

2: METER SIZE

Select A2: METER SIZE from the setting item selection menu. The currently set meter size of the detector appears.

Returns to the menu of setting item selection.

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Changing the meter size of the detector

The following is an example to change the meter size from 50mm to 10mm.

Switch operation Display example Description

A2: METER SIZE 50 mm

A2: METER SIZE 50

A2: METER SIZE 100

A2: METER SIZE 100 mm

2: METER SIZE

Select A2: METER SIZE from the setting item selection. The currently set meter size (50mm in this example) appears.

The cursor appears.

Change the set value for meter size to 100mm. The set value for meter size can be changed using (Note 1)

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

switch.

Note 1: The meter size is displayed cyclically as shown below:

In the case of the converter for large meter size detector (LF232*B)

600mm2.5mm 700mm 3000mm

0.1inch

24inch

28inch 120inch

* For partially filled pipes detectors (LF232*F) : 6

～24inch (150～600mm )

Note 2: If the setting value for meter value is changed, the setting value by flow unit and the setting

value for exciting frequency of no concern may be rewritten. After the meter size is set, be sure to check the setting values of Range, Count (Pulse) Rate and Exciting Frequency.

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8.2.3 Exciting Frequency

The exciting frequency can be selected from 6Hz, 12Hz and 24Hz. Since the features shown below are apparent depending on the exciting frequency, select an appropriate exciting frequency.

Exciting frequency 6Hz 12Hz 24Hz

Zero-point stability Good

Response

Fluid noise immunity

However, the range of usable exciting frequency depending on the detector to be combined is shown below.

Good

Detector combined

LF470 1/10",1/6”,1/4" (2.5 to 6 mm) ○ ○ ◎

LF150 26” to 120” (500 to 3000 mm) ◎

335 All sizes ◎

* Partially filled pipes type LF232*F : Useable only 6Hz

◎ Factory setting ○ Combination allowed

− Combination not allowed

Meter size

Corresponding exciting frequency

6Hz 12Hz 24Hz

−

Checking the exciting frequency

Proceed as follows to check or change the setting value for exciting frequency.

Switch operation Display example Description

A3: EX. FREQ. 24 Hz

Select A3: EX. FREQ. from the setting item selection menu. The currently set exciting frequency appears.

3: EX. FREQ.

Returns to the menu of setting item selection.

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Changing the setting value for exciting frequency.

The following is an example to change the exciting frequency from 24Hz to 12Hz.

Switch operation Display example Description

A3: EX. FREQ. 24 Hz

A3: EX. FREQ. 12

A3: EX. FREQ. 12 Hz

3: EX. FREQ.

Select A3: EX FREQ. from the setting item selection menu. The currently set exciting frequency (24Hz in this example) appears.

The cursor appears.

Change the exciting frequency to 12Hz. The exciting frequency appears cyclically between 6Hz, 12Hz and 24Hz. (Note 1)

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

Note 1: The exciting frequency is displayed cyclically as shown below.

6Hz 12Hz 24Hz

* Partially filled pipes type LF232*F : Useable only 6Hz

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8.2.4 Flow Direction

The flow direction of fluid can be set. Normally use the flowmeter under the condition of NORMAL.

Selection item Description

1: NORMAL

2: SWITCH

The flow is a direct flow when the fluid flows in the direction indicated by the arrow on the detector.

The flow is a direct flow when the fluid flows in the reverse direction of the arrow on the detector.

Checking the flow direction.

Proceed as follows to check or change the setting value for direction flow.

Switch operation Display example Description

A4: FLOW DIRCTN 1:NORMAL

4: FLOW DIRCTN

Select A4: FLOW DIRCTN from the setting item selection menu. The currently set flow direction appears.

Returns to the menu of setting item selection.

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Changing the flow direction.

The following is an example to show how to change the flow direction from NORMAL to SWITCH.

Switch operation Display example Description

Select A4: FLOW DIRCTN from the setting item selection

A4: FLOW DIRCTN 1:NORMAL

menu. The currently set flow direction (NORMAL in this example) appears.

A4: FLOW DIRCTN 1

:NORMAL

A4: FLOW DIRCTN 2

:SWITCH

A4: FLOW DIRCTN 2:SWITCH

4: FLOW DIRCTN

The cursor appears.

Change the flow direction to SWITCH.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

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8.2.5 Password Setting

The password function is provided to prohibit the settings and adjustment for the functions that affect the flow measurement. See 7.4 “Setting Menu List” for the functions limited by the password function.

If other than “000” is set for password and the mode is retuned to the measurement mode, the password function becomes valid. If “000” is set, there is no limitation such as setting is prohibition by password.

Checking the password

Proceed as follows to check the password. However, if other than “000” is set for password, you cannot check the password when you move to the setting mode unless you enter the correct password. (If you enter a wrong password, *** appears for password.)

Switch operation Display example Description

A5: PASSWORD 123

5: PASSWORD

Select A5: PASSWORD from the setting item selection menu. The currently set password appears.

Returns to the menu of setting item selection item.

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Changing the password

The following is an example to show how to change the password from 123 to 453.

Switch operation Display example Description

Select A5: PASSWORD from the setting item selection menu.

A5: PASSWORD 123

The currently set password data (123 in this example) appears. However, if a wrong password is entered when you move from the measurement mode to the setting mode, *** appears.

A5: PASSWORD 123

A5: PASSWORD 4

A5: PASSWORD 423

A5: PASSWORD 45

A5: PASSWORD 453

: PASSWORD

The cursor appears.

Press from the right to 4.

Move the cursor to the 2nd digit.

Press password to 5.

The display blinks and the set value is displayed for conformation. Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

to change the number of the 3rd digit of the password

switch to change the number of the 2nd digit of the

MENU/ENT

again to writer the data. Then the cursor

Note: If password is set, be sure so manage the system so that the password is protected and not

forgotten. If you forgot your password, you can check the password using the maintenance menu. For the procedure to move to the maintenance menu, see 7.3.5 “Maintenance Menu.” The service code to check the password is “800”. For the management method including the method to read the password, use the management method conforming to the management standard of the system used.

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8.2.6 Normal Indicating Unit

You can select one of the units listed below as normal indicating unit for 2 types of units, main unit (UNIT 1) and sub unit (UNIT 2) to be displayed in the measurement mode.

• Flow velocity unit: m/s, ft/s

• Flow rate unit: m

• Volumetric flow: m

• Other units: %, COUNT, RANGE, CUSTOM

%: Indicates the value in percent of the setting range

When multi-range is selected, the value is in percent of the range in operation.

COUNT: Indicates the count of the totalizer.

/s, m3/min, m3/h, m3/d l/s, l/min, l/h, l/d ml/s, ml/min, ml/h, ml/d gal/s, gal/min, gal/h, gal/d bbl/s, bbl/min, bbl/h, bbl/d pt/s, pt/min, pt/h, pt/d qt/s, qt/min, qt/h, qt/d

, l, ml, gal, bbl, pt, qt

RANGE: Indicates the range number of the range in operation when multi-range is selected.

CUSTOM: Indicates the flow rate value in the unit defined in 8.2.7 “Custom Unit.”

If the unit is set to volumetric flow or COUNT, the flow direction for total flow can be set.

If the indicting unit is set to volumetric flow or COUNT, the flow direction for total flow can also be set.

• Volumetric flow direction: F: Forward direction, R: Reverse direction

B: Forward/Reverse automatic switching, D: Total difference flow

indication

Checking the normal indicating unit

Proceed as follows to check the normal indicating unit. Here, only about the main unit (UNIT1) is explained. For sub unit (UNIT2), select the function number “B2”.

Switch operation Display example Description

B1: UNIT 1 %

Select B1: UNIT 1 from the setting item selection menu. The currently set main indicating unit appears.

1: UNIT 1

Returns to the menu of setting item selection.

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/s/

/h/

Checking the normal indicating unit

The following is an example to change the main indicating unit (UNIT1) from % to ml/s. In the case of sub unit (UNIT2), select the function “B2: UNIT 2.”

Switch operation Display example Description

B1: UNIT 1 %

B1: UNIT 1 m

B1: UNIT 1 ml

B1: UNIT 1 ml/s

l B

Select B1: UNIT 1 from the setting item selection menu. The currently set main indicating unit (% in this example) appears.

The cursor appears.

Change the volumetric unit to ml. (Note 1)

Move the cursor to the position of time unit.

Change the time unit to s. (Note 2)

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

again to write the data. Then the cursor

1: UNIT 1

Returns to the menu of setting item selection.

Note 1: Volumetric unit is displayed cyclically as follows:

RANGE COUNT ft/s

Note 2: Time unit is displayed cyclically loops as follows:

min

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d (Space)

gal

bbl

m/s

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Changing the flow direction for total flow

Proceed as follows to change the flow direction for total flow. The following is an example to show how to change the main indicating unit from Forward flow (F) to Forward/Rverse automatic switching (B). In the case of sub unit (UNIT2), select the function “B2: UNIT 2.”

Switch operation Display example Description

B1: UNIT 1 m

Select B1: UNIT 1 from the setting item selection menu. The currently set main indicating unit (m appears.

The cursor appears.

F in this example)

B1: UNIT 1 m

Move the cursor to the position of time unit.

B1: UNIT 1 m

Move the cursor to the position of flow direction for total flow.

B1: UNIT 1 m

Change the flow direction for total flow to B (forward/reverse automatic switching). (Note 1)

The display blinks and the set value is displayed for conformation.

MENU/ENT

Press

again to write the data. Then the cursor disappears and the display returns to the condition that the setting value is displayed.

B1: UNIT 1 m

1: UNIT 1

Returns to the menu of setting item selection.

Note 1: The flow direction for total flow is displayed cyclically as follows:

B (Forward/Reverse automatic switching) F (Forward direction)

R (Reverse direction)

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8.2.7 Custom Unit

The custom unit, which indicates the flow rate multiplied by an arbitrary coefficient, can be defined. The flow rate indication using the custom unit defined here can be used by selecting CUSTOM in the indicting unit setting.

The custom unit consists of an coefficient and a unit string

Coefficient of custom unit

A coefficient to determine the numeric value for indication by custom unit The indicated value is calculated in the following equation:

Custom unit indication (numeric value) = Measured value in m

The custom coefficient can be set in a numeric value of 6 digits including a decimal point.

Unit string of custom unit

The unit to be used for indication by custom unit A string of up to 7 characters using the following codes can be set.

/min × Custom coefficient

Alphabetic letters (lower case letters) : a

Alphabetic letters (upper case letters) : A

Number: 0

Symbol: ( ) ····· Parentheses % ········· Percent

= ·········· Equal sign

* ·········· Asterisk / ··········· Slash

········· Space (blank)

− z

− Z

− 9

. ··········· Period (dot) ⋅ ··········· Point : ··········· Colon

− ·········· Minus (hyphen)

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Checking the coefficient of custom unit

Proceed as follows to check the coefficient of custom unit.

Switch operation Display example Description

B3: CUSTOM DATA

12340.00

3: CUSTOM DATA

Select B3: CUSTOM DATA from the setting item selection menu. The currently selected coefficient appears.

Returns to the menu of setting item selection.

Changing the coefficient of custom unit

The following is an example to show how to change the coefficient from 1.00 to 1.25.

Switch operation Display example Description

B3: CUSTOM DATA

1.000000

B3: CUSTOM DATA

1.000000

Select B3: CUSTOM DATA from the setting item selection menu. The currently set coefficient appears.

The cursor appears. Press change.

further to move the cursor to the desired digit to

▲

B3: CUSTOM DATA

1.2 ↓

1.250000

B3: CUSTOM DATA

1.250000

3: CUSTOM DATA

00000

Change the number of the digit. To change other digit, press and change the number there. Repeat this operation until

1.250000 appears on the display.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

to move the cursor to that digit

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Checking the unit string of custom unit

Proceed as follows to check the unit string of custom unit.

Switch operation Display example Description

B4: CUSTOM UNIT AAA/BBB

4: CUSTOM UNIT

Select B4: CUSTOM DATA from the setting item selection menu. The currently set unit appears.

Returns to the menu of setting item selection.

Changing the unit string of custom unit

The following is an example to show how to change the unit string from AAA/BBB to XXX/ZZZ.

Switch operation Display example Description

B4: CUSTOM UNIT AAA/BBB

Select B4: CUSTOM UNIT from the setting item selection menu. The currently set unit appears.

The cursor appears. Press change.

further to move the cursor to the desired digit to

Change the character of the digit. (Note 1) To change other digit, press and change the character there. Repeat this operation until XXX/ZZZ appears on the display.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

to move the cursor to that digit

B4: CUSTOM UNIT

AA/BBB

X ↓ XXX/ZZZ

B4: CUSTOM UNIT XXX/ZZZ

4: CUSTOM UNIT

Note 1: The selectable characters are displayed cyclically as shown below:

Alphabet letter (lowercase) Alphabet letter (uppercase)

Symbol Number

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8.2.8 Span Value (Range)

The following constants are set here.

(1) Range type

(2) Span unit (changeable only for Range 1)

(3) Span value

(4) Hysteresis

Range type

By selecting the range type, the multi-range function can be used in which the range in operation is switched between the multiple ranges depending on whether the flow rate is value large or small, or the flow direction is forward or reverse. If it is not necessary to use the multi-range function, set the Range type to Single range.

RANGE TYPE RANGE TYPE

1:SINGLE

2:4F-0R

3:2F-2R

4:EXT.2F-0R

5:EXT.2F-2R

6:EXT.4F-0R

Single range

Single direction, 4 ranges Internal automatic switching

Forward/reverse direction, 2 ranges Internal automatic switching

Single direction, 2 ranges External signal switching

Forward/reverse direction, 2 ranges External signal switching

Single direction, 4 ranges External signal switching

Note: To use the multi-range function, the following DO and DI are required:

In the case of internal automatic switching ranges

2 ranges, forward/reverse range·························1 Digital Output 3 ranges or more, forward/reverse 2 ranges·······2 Digital Outputs

In the case of external signal switching ranges

2 ranges, forward/reverse range·························1 Digital Inputs 3 ranges or more, forward/reverse 2 ranges·······2 Digital Inputs

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Span value

The span value can be set using the actual flow rate unit (m3/h, etc.) and flow velocity unit (m/s).

(1) Setting range

The span value can be set within the range of 0 –1.0 ft/s to 0 – 32.8 ft/s (0.1m/s to 10m/s) in terms of flow velocity (The range that detector can measure changes with detector type. The details please refer to Chapter 15 "specifications")

If you try to set a span value outside of this range, either of the following messages appears depending on whether it is a high limit or low limit error:

* H. OVER SPEC. (if a value exceeding 32.8 ft/s (10 m/s) is set)

* L. OVER SPEC. (if a value of less than 1.0 ft/s (0.1 m/s) is set)

Try to set a new value again.

In the case of Single range setting, select Range 1 only.

(2) Multi-range setting

To use the multi-range function, select Ranges 1 to 4. When you set these ranges, the following condition must be observed:

Range 1 > Range 2 > Range 3 > Range 4 (in the case of single direction, multiple ranges)

Range 1 > Range 2, Range 3 > Range 4 (in the case of forward/reverse direction, multiple ranges)

If you try to set the ranges not conforming to the above condition, the following message appears:

* MULTI RNG ERR

Try to set the ranges again. In addition, set “0” for the ranges not used.

(3) Influence on count rate (pulse rate)

If the range is changed when the count rate (pulse rate) is already set, pulse output at the time of 100% output may exceed the allowable output range. If this happens, either of the following messages appears after the ranges are set and the system goes to the count rate setting.

* H. OVER C RATE or * L. OVER C RATE

Try to set the count rate (pulse rate) again referring to 8.2.15 “Count Rate (pulse rate) and Pulse Width.”

Unit of span

Range 1 is used to set the unit of span. The unit applies automatically to other ranges of Range 2 to Range 4 and it is not necessary to set the unit for these ranges separately. The setting units can be selected from the following units:

• Flow velocity unit: m/s

• Flow rate unit: m

If you change the unit, the new span value based on the newly set unit will be automatically displayed.

/s, m3/min, m3/h, m3/d, l/s, l/min, l/h, l/d, ml/s, ml/min, ml/h, ml/d

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Hysteresis

The dead band, which is used to switch the ranges in the case of internal automatic switching multi-range, is set here. It is not necessary to set hysteresis in other range types. (The set value will be ignored.) The hysteresis can be set within the range of 0 to 25% in increments of 0.1%.

Span value (range) setting flow

The setting sequence of span value (range) is shown below.

Item selection of span value (range) setting

C1: RANGE TYPE

C2: RANGE 1

C3: RANGE 2

C4: RANGE 3

C5: RANGE 4

C6: RANGE HYST

: Range type setting

: Range 1 span value and unit setting

: Range 2 span value

: Range 3 span value

: Range 4 span value

: Hysteresis setting

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Checking each constant

How to check the Range 1 is shown here. To check other setting values, select the following function numbers:

Range type C1: RANGE TYPE

Range 2 span value C3: RANGE 2

Range 3 span value C4: RANGE 3

Range 4 span value C5: RANGE 4

Hysteresis C6: RANGE HYST

Switch operation Display example Description

C2: RANGE 1

02.000 m/s

2: RANGE 1

Select C2:RANGE 1 from the setting item selection menu. The currently set Range 1 span value appears.

Returns to the menu of setting item selection.

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Changing the range type

Before changing the span value, Rang type must be set. The following is an example to show how to change the range type from Single range (1:SINGLE) to the bidirectional internal signal switching multi-range (3:2F-2R).

Switch operation Display example Description

C1: RANGE TYPE 1:SINGLE

C1: RANGE TYPE 1

:SINGLE

C1: RANGE TYPE 3

:2F-2R

C1: RANGE TYPE 3:2F-2R

1: RANGE TYPE

Select C1: RANGE TYPE from the setting item selection menu. The currently set range type (1:SINGLE) appears.

The cursor appears.

Select the range type 3:2F-2R.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

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/s/

/h/

Changing the span value

The span value for each range is set. The following is an example to show how to change the span value of Range 1 from 2.0m3/h to 100 l/min.

Switch operation Display example Description

C2: RANGE 1

2.0000 m3/h

Select C2: RANGE 1 from the setting item selection menu. The currently set span value for Range 1 (2.0 m example) appears.

/h in this

The cursor appears.

C2: RANGE 1 2

.0000 m3/h

C2: RANGE 1

2000.0 l

↓

33.333 l/m

C2: RANGE 1 3

3.333 l/min

Press

further to move the cursor to the digit of volumetric

unit.

Change the volumetric unit to l. Press

to move the cursor to the digit of time unit and likewise change the unit to min. (Note) (The span value will be automatically changed as this unit is changed.)

Move the cursor to the desired digit to change.

C2: RANGE 1 1

3.333 l/min

↓

100.00

l/min

Change the number of the digit. To change other digit, press under this condition to move the cursor to that digit and change the number there.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press

again to write the data. The cursor disappears and returns to the condition that the set value is displayed.

C2: RANGE 1

100.00

l/min

2: RANGE 1

Returns to the menu of setting item selection.

Note: The items of unit are displayed cyclically as shown below:

Volumetric unit

ptqt

gal

bbl

• A combination of m/min, m/h , m/d, ft/min, ft/h and ft/d cannot be selected.

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Time unit

min

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Changing the hysteresis

The hysteresis value is set to 3% unless otherwise specified when the converter is shipped from the factory. The following is an example to show how to change the hysteresis value from 3% to 5%.

Switch operation Display example Description

C6: RANGE HYST

03.0 %

C6: RANGE HYST 0

3.0 %

C6: RANGE HYST 03

C6: RANGE HYST 05

C6: RANGE HYST

05.0 %

.0 %

Select C6: RANGE HYST from the setting item selection menu. The currently set hysteresis value appears. (Note)

The cursor appears.

Move the cursor to the desired digit to change.

Change the number of the digit. To change other digit, press the cursor to that digit and change the number there.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

again to write the data. Then the cursor

under this condition to move

6: RANGE HYST

Returns to the menu of setting item selection.

Note: If you try to set a value exceeding 25.0%, *H. OVER SPEC.* appears and the value returns to

the previously set value. Try to set a new value again.

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8.2.9 Damping Constant

The damping constant is set to average out the output fluctuations. (The larger the damping constant, the more the output is averaged and the fluctuations can be reduced but the response becomes slower.)

The damping constant can be set from 0.0sec, 0.5sec, and 1 to 60sec (1sec each). (If detector is partially filled pipes type, the damping constant can be set from 0.0sec, 5sec, and 10 to 600sec (1sec each).) Note: If 0.0 sec is set, the damping constant becomes a value equivalent to 0.1 sec.

If you set a value exceeding 60s, it is forcibly changed to 60s before data is written.

Checking the damping constant

Proceed as follows to check the damping constant.

Switch operation Display example Description

D1: DAMPING

02.0 s

1: DAMPING

Select D1: DAMPING from the setting item selection menu. The currently set damping constant appears.

Returns to the menu of setting item selection.

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Changing the damping constant

The following is an example to show how to change the damping constant from 0.5 sec to 10 sec.

Switch operation Display example Description

D1: DAMPING

00.5 s

D1: DAMPING

00.5 s

D1: DAMPING 1

10.0

D1: DAMPING

10.0 s

1: DAMPING

0.5 s

Select D1: DAMPING from the setting item selection menu. The currently set damping constant (0.5 s in this example) appears.

The cursor appears. Press change.

Change the number of the digit. To change other digit, press the cursor to that digit and change the number these.

The display confirmation. Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

further to move the cursor to the desired digit to

under this condition to move

links and the setvalue is displayed for

MENU/ENT

again to write the data. Then the cursor

Note: If you set a value exceeding max value, it is forcibly changed to max value before data is

written.

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8.2.10 Low Cutoff value

The low cutoff is the fuction to forcefully fix the current output to 0% when the flow rate becomes equal or below the low cutoff value set near 0%.

The low cutoff value can be set from 0 to 10% and in increments of 0.1%.

If 0% is set, the low cutoff function does not work.

Checking the low cutoff value

Proceed as follows to check the low cutoff value.

Switch operation Display example Description

D2: LOW CUT

01.0 %

2: LOW CUT

Select D2: LOW CUT from the setting item selection menu. The currently set low cutoff value appears.

Returns to the menu of setting item selection.

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Changing the low cutoff value

The following is an example to show how to change the low cutoff value from 1.0% to 3.0%.

Switch operation Display example Description

D2: LOW CUT

01.0 %

D2: LOW CUT

01.0 %

D2: LOW CUT 03

D2: LOW CUT

03.0 %

2: LOW CUT

.0%

Select D2: LOW CUT from the setting item selection menu. The currently set low cutoff value (1.0 % in this example) appears.

The cursor appears. Press change.

Change the number of the digit. To change another digit, press the cursor to that digit and change the number there.

The display brinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

further to move the cursor to the desired digit to

under this condition to move

MENU/ENT

again to write the data. Then the cursor

Note: If you try to set a value exceeding 10.0%, *H. OVER SPEC.* appears and the value returns to

the previously set value. In that case, try to set a new value again.

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8.2.11 Current Output Setting Used When an Alarm Occurs

The current output value setting used when an alarm occurs is the function to fix the current output to a pre-selected value if a fluid empty alarm or a self-diagnosis alarm occurs.

For the type of alarms to fix the current output, see the alarm output factor setting in 8.2.19 “Self-Diagnosis Function.”

Select the current output value used when an alarm occurs from the table shown below.

Current output setting function used when an alarm occurs

Selection Current output value when an alarm occurs

1:UNDER 3.0mA 2:4.0mA 3:HOLD 4:OVER 24.0mA

3.0mA or less

4.0mA

Fixed to the current output

24.0mA or more

Checking the current output value used when an alarm occurs

Proceed as follows to check the current output value used when an alarm occurs.

Switch operation Display example Description

Select D3: 4−20 ALM. OUT from the setting item selection

D3: 4-20 ALM.OUT 2:4.0mA

3: 4-20 ALM.OUT

menu. The currently set current output value used when an alarm occurs appears.

Returns to the menu of setting item selection.

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Changing the current output value used when an alarm occurs

The following is an example to show how to change the current output value, which is used when an alarm occurs, from 4.0mA (2: 4.0mA) to 24.0mA or more (4: OVER 24.0mA).

Switch operation Display example Description

Select D3: 4−20 ALM. OUT from the setting item selection

D3: 4-20 ALM.OUT 2:4.0mA

menu. The currently set alarm output value used when an alarm occurs appears.

D3: 4-20 ALM.OUT 2

:4.0mA

D3: 4-20 ALM.OUT 4

:OVER 24.0mA

D3: 4-20 ALM.OUT 4:OVER 24.0mA

3: 4-20 ALM.OUT

The cursor appears.

Press

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

to select 4: OVER 24.0mA.

MENU/ENT

again to write the data. Then the cursor

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8.2.12 Display low cut On/Off

When the low output is cutoff by the setting in 8.2.10 “Low cutoff value,” whether the instantaneous flow rate, flow velocity and % value should be set to zero or not can be selected.

Selection Display low cutoff

1: ON

2: OFF

Display low cut is effective (On)

Display (instantaneous flow rate, flow velocity and %) will be set to zero when the low output is cutoff.

Display low cut is not effective (Off)

Measured value will be output even if the low output is cutoff.

Checking whether the display low cut is On or Off

Proceed as follows to check whether the display low cut is On or Off.

Switch operation Display example Description

D4: DSP LOW CUT 2:OFF

4: DSP LOW CUT

Select D4: DSP LOW CUT from the setting item selection menu. The currently set display low cut On/Off status appears.

Returns to the menu of setting item selection.

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Changing the display low cut On/Off setting.

The following is an example to show how to change the display low cut setting from 2.OFF to 1:ON.

Switch operation Display example Description

Select D3: 4−20 ALM. OUT from the setting item selection

D4: DSP LOW CUT 2:OFF

menu. The currently set alarm output value used when an alarm occurs appears.

D4: DSP LOW CUT 2

:OFF

D4: DSP LOW CUT 1

:ON

D4: DSP LOW CUT 1:ON

4: DSP LOW CUT

The cursor appears.

Press

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

to select 1:ON.

MENU/ENT

again to write the data. Then the cursor

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8.2.13 Output Low Limit Setting

The low limit for 4 to 20mA output can be selected.

If 3.2mA or 2.4mA is selected, the output value of less than 4mA (0%) can be output when the flow is in reverse direction.

The output low limit setting can be selected from the items shown in the table below.

Output low limit value

Selection Output low limit value

1:4.0mA 4.0mA(0%)

2:3.2mA 3.2mA (-5%)

3:2.4mA 2.4mA (-10%)

* To set the output low limit to other than 4.0mA, set the low cutoff value to 0% in 8.2.10 “Low

Cutoff Value.” If the low cutoff value is set to other than 0%, the output low limit value becomes 4.0mA fixed regardless of the value of the output low limit setting.

Checking the output low limit value setting.

Proceed as follows to check the output low limit value.

Switch operation Display example Description

D5: LOW LIMIT 1:4.0mA

5: LOW LIMIT

Select D5: LOW LIMIT from the setting item selection menu. The currently set output low limit value appears.

Returns to the menu of setting item selection.

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Changing the output low limit value setting.

The following is an example to change the output low limit setting from 4.0mA (1: 4.0mA) to

3.2mA (2: 3.2mA).

Switch operation Display example Description

D5: LOW LIMIT 1:4.0mA

D5: LOW LIMIT 1

:4.0mA

D5: LOW LIMIT 2

:3.2mA

D5: LOW LIMIT 2:3.2mA

5: LOW LIMIT

Select D5: LOW LIMIT from the setting item selection menu. The currently set output low limit value appears.

The cursor appears.

Press

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

to select 2:3.2mA.

MENU/ENT

again to write the data. Then the cursor

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8.2.14 Digital I/O Function

Digital I/O functions can be selected.

Select the digital I/O functions from the items shown below.

For details of digital I/O functions, see 10. “Function Description.”

Digital output functions (corresponding to each terminal)

DO FUNCT. Digital output functions DO1 DO2 DO3 to DO4

1: NO USE Not used

2: HIGH ALM High limit alarm output

3: HH ALM High-high limit alarm output

4: LOW ALM Low limit alarm output

5: LL ALM Low-low limit alarm output

6: RNG SIG 1 Range output No.1

7: RNG SIG 2 Range output No.2

8: PRESET Preset counter output

9: CONV. ALM Converter error alarm output (Note 3)

A: EMPTY ALM Fluid empty alarm output

B: PULSE OUT Pulse output (Note 1) (Note 2)

C: PULSE FRD Forward flow pulse output (Note 2)

D: PULSE REV Reverse flow pulse output (Note 2)

Note 1: When the range type is set to the forward/reverse multi-range, and the pulse output (8: PULSE OUT) is

selected, pulse output can be sent out in either forward current or reverse current flow.

Note 2: Pulse output using the DO2 can be sent out up to 100pps.

When the pulse output is sent out using the DO2, set the count rate so that the pulse output for full scale value does not exceed 100pps. For count rate setting, see 8.2.15 “Count Rate (Pulse Rate) and Pulse Width.”

Note 3: For the types of alarms to output, see the alarm output factor setting in 8.2.19 “Self-Diagnosis

Function.”

−

○: Enabled − : Disabled

Digital output state (only when alarm output is set)

For alarm output function (items indicated by above), alarm output operation can be selected independently for each DO terminal.

DO ALM ACT Alarm output operation

1: NORMAL CLOSE Normal: Contact closed, When alarm occurs: Contact open

2: NORMAL OPEN Normal: Contact open, When alarm occur: Contact closed

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Digital Input Function

DI FUNCT. Digital input function

1: NO USE Not used

2: C STA/STP Totalizer Start/Stop control

3: C RES/STA Totalizer Reset/Start control

4: RANGE SW1 Multi-range external switching signal 1

5: ZERO ADJ Still water zero adjustment start

6: FIXED OUT Fixed-value output mode control

7: RANGE SW2 Multi-range external switching signal 2

Level setting for digital input control signal (for totalizer control only)

For totalizer control (items indicated by above), the operating level (active level) for input control signal can be selected for each DI terminal.

DI DET LEVEL Control signal level

1: L LEVEL Low level active

2: H LEVEL High level active

The operation for control signal input is shown below depending on the active level setting.

Digital input function setting

CNT STA/STP (Totalizer Start/Stop)

CNT RES/STA (Totalizer Reset/Start)

Control signal level setting

L LEVEL

H LEVEL

L LEVEL

H LEVEL

Operation when control signal is input

High signal: Totalization Stop Low signal: Totalization Start

High signal: Totalization Start Low signal: Totalization Stop

High signal: Totalization Start Low signal: Totalization Reset

High signal: Totalization Reset Low signal: Totalization Start

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Checking each setting for digital I/O

The following is an example to show how to check the function setting of Digital Output 1. To check other setting values, select the following function numbers.

Digital Output 1

F1: DO1 FNCTN

Digital Output 2 F2: DO2 FNCTN Digital Output 3 F3: DO3 FNCTN Digital Output 4 F4: DO4 FNCTN Digital Output alarm state 1 F5: DO1 ALM STS Digital Output alarm state 2 F6: DO2 ALM STS Digital Output alarm state 3 F7: DO3 ALM STS Digital Output alarm state 4 F8: DO4 ALM STS Digital Input 1 G1: DI1 FNCTN Digital Input 2 G2: DI2 FNCTN Digital Input control signal level 1 G3: DI1 DET LEV Digital Input control signal level 2 G4: DI2 DET LEV

Switch operation Display example Description

F1: DO1 FNCTN 1:HIGH ALM

1: DO1 FNCTN

Select F1: DO1 FNCTN from the setting item selection menu. The currently set function of Digital Output 1 appears.

Returns to the menu of setting item selection.

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Changing each setting for digital I/O

The following is an example to show how to change the function of Digital Output 1 from High limit alarm output (2:HIGH ALM) to Fluid empty alarm (A:EMPTY ALM). To change other setting values, select the following function numbers.

Digital Output 1

F1: DO1 FNCTN

Digital Output 2 F2: DO2 FNCTN Digital Output 3 F3: DO3 FNCTN Digital Output 4 F4: DO4 FNCTN Digital Output alarm status 1 F5: DO1 ALM STS Digital Output alarm status 2 F6: DO2 ALM STS Digital Output alarm status 3 F7: DO3 ALM STS Digital Output alarm status 4 F8: DO4 ALM STS Digital Input 1 G1: DI1 FNCTN Digital Input 2 G2: DI2 FNCTN Digital Input control signal level 1 G3: DI1 DET LEV Digital Input control signal level 2 G4: DI2 DET LEV

Switch operation Display example Description

F1: DO1 FNCTN 1:HIGH ALM

F1: DO1 FNCTN 1

:HIGH ALM

Select F1: DO1 FNCTN from the setting item selection menu. The currently set function of Digital Output 1 appears.

The cursor appears.

F1: DO1 FNCTN

:EMPTY ALM

F1: DO1 FNCTN A:EMPTY ALM

1: DO1 FNCTN

Select the output function A:EMPTY ALM.

The display blinks and the set value is displayed for confirmation.

MENU/ENT

Press disappears and the display returns to the condition that the setting value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

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8.2.15 Count Rate (Pulse Rate) and Pulse Width

Totalizer is incremented each time a volumetric flow set for predetermined count rate enters and one pulse is sent out through DO output. It is necessary to set the count rate and pulse width when the total volumetric flow or count value indication is selected or when pulse output is used.

The following parameters can be set here:

(1) Count rate (Pulse rate)

(2) Pulse width mode

(3) Pulse width

Notes

• To use the pulse output, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.” If the pulse output is not used and only the total volumetric flow or count value indication is used, it is not necessary to set the DO function.

• To use the total volumetric flow indication or count value indication, it is necessary to set the

indicating unit. For how to set the indicating unit, see 8.2.6 “Normal Indicating Unit.” Even if the pulse output only is used, it is recommended that you set a total volumetric flow unit or a count value unit as indicating unit to check the operation.

Count rate

A volumetric value per 1 count (1 pulse) for the totalizer is set. The total volumetric flow is the totalizer count multiplied by the count rate.

• The count rate must be set so that the pulse output at 100% output stays within a range of 3.6 to

3,600,000 pulses/h. If you try to set a value outside of this range, an error message *H. OVER SPEC* or *L. OVER SPEC* appears and the value returns to the previously set value. Try to set a new value again.

Example: When the range is 3,600m

Minimum value: 3,600m Maximum value: 3,600m

/h (1m3/s), the settable count rate is as follows:

/h ÷ 3,600,000 pulses/h = 0.001m3 = 1 l (liter)

/h ÷ 3.6 pulses/h = 1,000m3

Pulse width mode

Whether the pulse width of the totalizer pulse output should be set automatically or a specified pulse width is set can be selected.

Selection Pulse width setting

1:AUTO

2:MANUAL

Note: If the total volumetric flow indication or count value indication is used, and the pulse output is not

used, it is recommended that you select the pulse width automatic setting.

Pulse width automatic setting

Automatically set to the settable maximum pulse width according to the set count rate.

Pulse width manual setting

Pulse width set by pulse width setting

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Pulse width

The pulse width for totalizer pulse output is set. If Automatic setting (1:AUTO) is selected for pulse width mode, it is not necessary to set the pulse width.

• The pulse width must be set to a value within the range of 0.3ms to 500ms. If you try to set a

value exceeding 500 ms, the value will be forcibly changed to 500ms.

• The pulse width must be set to 40% or less of the pulse period at 100% output. If a value

exceeding this limit is tried to set, regardless of the range described above, an error message * H. OVER SPEC appears and the value returns to the previously set value. Try to set a new value again. If the pulse width is set to 0, it will be automatically set to 40% of the pulse period at 100% output. However, if the calculation result exceeds 100ms, it will be forcibly set to 100ms.

Example 1 In the case of the following:

Range: 3,600m Count rate: 0.001m

/h (1m3/s)

Since the count rate is 3,600 m the full-scale period is 1s

÷ 1000 = 1ms.

Therefore, the pulse width can only be set to 1ms x 0.4 = 0.4ms.

Example 2 In the case of the following:

Rage: 3,600m Count rate: 1000m

/h (1m3/s)

Since the pulse count is 3,600m full-scale period is 1s

÷ 0.001 = 1000s.

Therefore, the pulse width becomes 1000s value is 500ms, the pulse width becomes 500ms.

Example 3 In the case of the following:

Rage: 3,600m Count rate: 1m

/h (1m3/s)

Pulse width is set to 0ms

Since the pulse count is 3,600m period is 1s

÷ 1 = 1s.

/h ÷ 0.001(m3) = 3,600,000 pulses/h (1000 pulses/s),

/h ÷ 1000m3 = 3.6 pulses/h (0.001 pulse/s), the

× 0.4 = 400s. However, since the maximum

/h ÷ 1m3 = 3600 pulses/h (1 pulse/s), the full-scale

Therefore, the pulse width becomes 1s

× 0.4 = 400ms. However, in the case of

automatic setting, since the maximum value is 100ms, the pulse width becomes 100ms.

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Checking the count rate and pulse width

How to check the count rate setting is shown below. To check other setting values, select the following function numbers:

Pulse width mode

H2: PLS MODE

Pulse width H3: PLS WIDTH

Switch operation Display example Description

H1: COUNT RATE

1.00000 m3

1: COUNT RATE

Select H1: COUNT RATE from the setting item selection menu. The currently set count rate appears.

Returns to the menu of setting item selection.

Changing the count rate

The following is an example to change the count rate from 0.01m3 to 200 l (liter).

Switch operation Display example Description

H1: COUNT RATE

1.00000 m3

Select H1: COUNT RATE from the setting item selection menu. The currently set count rate appears.

H1: COUNT RATE

1.00000 m

H1: COUNT RATE

1000.00 l ↓

200.000 l

H1: COUNT RATE

200.000 l

1: COUNT RATE

The cursor appears. Press

Change the unit to l. Then press and change the number there. Repeat this operation until 200 l appears on the display.

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

further to move the cursor to the digit of unit.

to move the cursor to the desired digit to change

MENU/ENT

again to write the data. Then the cursor

Note: The indicting units for count rate are displayed cyclically as shown below.

gal bbl

pt qt

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Changing the pulse width mode setting

The following is an example to change the pulse width mode setting from 2:MANUAL to 1:AUTO.

Switch operation Display example Description

H2: PLS MODE 2:MANUAL

H2: PLS MODE 1

:AUTO

H2: PLS MODE 1

:AUTO

2: PLS MODE

Select H2: PLS MODE from the setting item selection menu. The currently set pulse width mode setting appears.

The cursor appears.

Press

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

to select 1:AUTO.

MENU/ENT

again to write the data. Then the cursor

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Changing the pulse width

The following is an example to change the pulse width from 100ms to 250ms.

Switch operation Display example Description

H3: PLS WIDTH

100.0 ms

H3: PLS WIDTH

100.0 ms

H3: PLS WIDTH 2 ↓

Note: If you try to set a value exceeding the settable range, *H. OVER SPEC. appears and the value returns to

the previously set value. Try to set a new value again.

H3: PLS WIDTH

250.0 ms

3: PLS WIDTH

00.0 ms

0.0 ms

Select H3: PLS WIDTH from the setting item selection menu. The currently set pulse width appears.

The cursor appears. Press change.

Change the number of the digit. To change other digit, press the cursor to that digit and change the number there.

The display blinks and the set value is displayed for confirmation. Press disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

further to move the cursor to the desired digit to

under this condition to move

MENU/ENT

again to write the data. Then the cursor

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8.2.16 Preset Counter

Preset counter is the function to output a signal through DO when the totalized count reaches a preset value. For details of preset counter function, also see 10. “Function Description.”

The following parameters can be set here:

(1) Preset count value

(2) Preset output function

Notes

• Preset counter works only for forward direction flow count.

• To use the preset counter, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.”

• To use the preset counter, it is recommended that you set a total volumetric flow unit or a count

value unit as indicating unit to check the operating condition. For how to set the indicating unit, see 8.2.6 “Normal Indicating Unit.”

Preset count value

Preset value for preset counter is set. Preset count value can be set within the range of 0 to 99999999.

Preset output function

The operation of DO output when the preset counter reaches the preset value can be selected. You can select the operation of DO output from the items shown in the table below:

PRESET FUNCT. Preset output function

1: HOLD Output level is held

2: 50ms PULSE One-shot pulse output of 50ms pulse width

3: 500ms PULSE One-shot pulse output of 500ms pulse width

Note: If the preset output function is set to “50ms PULSE” or “500ms PULSE,”

select the preset count value to become 1, 2, 5, 25 or 125 × 10 not satisfying this condition is set, the preset output timing may be shifted when the totalizer overflows.)

. (If a value

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Checking the preset counter setting

How to check the preset count value is shown below. To check the preset output function, select the function “I2: PRESET FNC.”

Switch operation Display example Description

I1: PRESET CNT 00000300

1: PRESET CNT

Select H1:PRESET from the setting item select menu. The currently set preset count value appears.

Returns to the menu of preset item selection.

Changing the preset count value

The following is an example to show how to change the preset value from 500 (count) to 1000 (count)

Switch operation Display example Description

I1: PRESET 00000500

I1: PRESET 0

0000500

Select I1:PRESET from the setting item selection menu. The currently set preset count value (500 counts in this example) appears.

The cursor appears. Press change.

further to move the cursor to the desire digit to

I1: PRESET 00001 000010

I1: PRESET 00001000

1: PRESET

500

Change the number of the digit. To change other digit, press the cursor to that digit and change the number there

The display blinks and the set value is displayed for confirmation

MENU/ENT

Press disappears and the display returns to the condition the setting value is displayed.

Returns to the menu of setting item selection.

again to write the data. Then the cursor

under this condition to move

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Toshiba L5232 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual