Toshiba TV Converter Box L5232 User manual

Electromagnetic Flowmeter Converter

LF232 Type

INSTRUCTION MANUAL

6F8A0917

NOTES

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

•

NEVER attempt to operate the equipment in any ways that are not described in this instruction manual.

•

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

•

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

6F8A0917

NOTICE

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

Converter.

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

To use this product properly and safely, read this manual carefully before using this product.

After reading this manual, store it in a place where it can be referred to whenever needed.

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

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

About

Safety Precautions

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

The “

Safely symbols

” used in the “

Safety Precautions

” are shown in a location such as in the margin to the left of the corresponding commentary in the main text.

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

NOTES

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

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

3. Be sure to follow all safety, operating and handling precautions described in this

Manual and the regulations in force in the country in which this product is to be used.

2 nd

Edition August, 2008

First Edition June, 2008

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6F8A0917

SAFETY PRECAUTIONS

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

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

Explanation of signal words

The signal word or words are used to designate a degree or level of hazard seriousness.

The signal words used for the product described in this manual are WARNING and CAUTION.

Indicates a potentially hazardous situation which, if not avoided, could result in

death or serious injury

Indicates a potentially hazardous situation which, if not avoided, may result in

minor to moderate injuries

or in

property damage

Notes:

1 “Serious injury” refers to an injury such as loss of sight, physical damage, burns (high temperature or low temperature) electric shock, bone fracture and poisoning and the after effect of the injury remains or the injury requires hospitalization or long periods of outpatient treatment.

2 “Minor to moderate injuries” refers to burns, electric shocks, and so on, that do not require the injured person to be hospitalized or go to a hospital for a long period of time for medical treatment. “Property damage” includes all kinds of damage to property, equipment or materials.

Safety symbols

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

Indicates an action that is prohibited. Simply DON’T do this action.

The prohibited action is indicated by a picture or text inside or next to the circle

Indicates an action that is mandatory. DO this action.

The mandatory action is indicated by a picture or text inside or next to the circle.

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

Color explanation

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

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

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6F8A0917

SAFETY PRECAUTIONS

(continued)

Safety Precautions for Installation and Wiring

Do not use the LF232 in an

atmosphere

DON’T

explosive

Install a switch and fuse

to isolate the LF232 from mains power.

DO work.

Using this product in an explosive atmosphere can cause

Power supply from mains power can cause

electric shock or circuit break-down

Turn off mains power

cause

Turn off mains power explosion

before conducting wiring

Wiring while power is applied can

electric shock

before working on pipes.

Working on pipes while power is applied can cause

Do not conduct wiring work

electric shock

with bare hands

DON’T

Remaining electric charge

even if power is turned off can still cause

electric shock

Use an

appropriate device

to carry and install the LF232.

If this product

falls to the ground

, injury, or malfunction of or damage to the product, can be caused.

Do not modify or disassemble

the LF232 unnecessarily.

DON’T

Modifying or disassembling this product can cause

electric shock, malfunction of or damage to this product

Ground

the LF232

independently from power equipment

Type D (100 ohm or less ground resistance)

Operating this product without grounding can cause

electric shock

malfunction

Use

crimped terminal lugs

for the terminal board and GND terminal.

Loose connections can cause

electric shock, fire from excessive current or system malfunction

Do not work on piping and wiring

with wet hands

DON’T

Wet hands may result in

electric shock

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

Be alert to

electric shock

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6F8A0917

SAFETY PRECAUTIONS

(continued)

Safety Precautions for Maintenance and Inspection

Do not touch the LF232 main body when

high temperature fluid

is being measured.

DON’T

The fluid raises the main body temperature and can cause

burns

when touched.

Do not conduct wiring work

with wet hands

DON’T

Do not use

a fuse other than the one specified

DON’T

Wet hands may result in e

lectric shock

Using a fuse other than the one specified can cause

system failure

damage or malfunction

Do not conduct wiring work when

power is applied

Wiring while power is applied can cause

electric shock

DON’T

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

Use a rated fuse as follows:

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:

Diameter 5.2 mm × 20 mm

Melting time characteristic:

Normal blow

Usage limitation

(1) This product is

not manufactured for applying to a system requiring safety directly involved human life as follows

. Please contact your nearest Toshiba reprehensive if there is a possibility of using this product for such use.

−

Main control systems of nuclear power plants, safety protection systems in nuclear facilities or other important systems requiring safety

−

Medical control systems relating to life support

(2) This product is

not approved for explosion-proof applications. Please do not use this product in an explosive atmosphere (explosion protection area)

Warranty and Limitation of Liability

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

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6F8A0917

Handling Precautions

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

(1)

Do not store or install

the flowmeter in:

•

Places where there is direct sunlight

. If this is unavoidable, use an appropriate

sunshade

. If the control keys (infrared switches) are exposed to direct sunlight,

they may not function correctly

•

Places where there is snow and ice

Infrared switches may not function correctly.

•

Places where

excessive vibration or mechanical shock

occurs.

•

Places where

high temperature or high humidity

conditions obtain.

•

Places where

corrosive atmospheres

exit.

•

Places that can be submerged under water

•

Place where there is slop floor

. To put the flowmeter temporarily on the floor,

place it carefully with something

such as stopper

to support it so that the flowmeter will not topple over

•

Places where there is following factors.

◆

Factors to impede infrared switch to operate properly

・

Intense light such as direct sunlight and reflected sunlight by window glass or metal plate

・

Place where brightness changes suddenly such as ON/OFF of lighting

・

Dense smoke or steam near the control panel

・

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

・

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

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

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

Be sure to ground at the combined converter side (

class D grounding

(

grounding resistance

100 Ω or less

)). Avoid a common ground

used with other equipment

where earth current may flow. An

independent ground

is preferable.

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

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

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

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6F8A0917

Handling Precautions

(continued)

(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

•

Move the antenna of a transceiver or a cellular phone

at least 50 cm

away from the flowmeter and signal cables when using it.

•

Do not use a radio transmitter or a cellular phone near the flowmeter

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

•

Do not install a radio transmitter antenna

near the flowmeter and signal cables.

(10) For reasons of flowmeter failure, inappropriate parameters, unsuitable cable connections or poor installation conditions, the flowmeter may not operate properly. To prevent any of these problems causing a system failure,

it is recommended that you have preventive measures designed and installed on the flowmeter signal receiving side

(11)

For piping and installation of the combined detector, check the model number of detector and read the instruction manual of the relevant detector

* We assume no responsibility for nonconformity caused by violation of precautions described in this manual or used in violation of the installation method and the operation method stipulated in a relevant ordinance or other regulations.

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6F8A0917

1. Product Inspection and Storage

···················································································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

5.3 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

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

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

(Mode Switching, Setting Mode Operation, Total Counter Operation)························43

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

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

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6F8A0917

8. Parameter Settings / Adjustment

·················································································55

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

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

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

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

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

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

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

9. Mag-Prover

·································································································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

····································································································127

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

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

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6F8A0917

10.4 Flow Rate High/Low Limit Alarm Output···································································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

··························································································149

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

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

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

and

···································································································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

16. Outline

··············································································································171

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6F8A0917

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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6F8A0917

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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6F8A0917

3. Names of Parts

Appearance

Mounting plate

Display section

Operation switch

(Infrared switch)

Converter cover

Converter cover mounting screw

Cable connection for signal cable

Mounting plate

Cable connection (Cap nuts) 5 pieces

Appropriate cable outer diameter: 11 to 13mm

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

Cable connection for power cable

Ground terminal

Cable connection for excitation cable

Cable connection for digital I/O 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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6F8A0917

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

Power supply terminals

Fuse holders

Power switch

Protection cover

Internal ground terminal

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6F8A0917

4. Installation

Cautionary notes on installation

Do not use the LF232 in an

explosive atmosphere

DON’T

Using this product in an explosive atmosphere can cause

explosion

Do not modify or disassemble

the LF232 unnecessarily.

DON’T

Modifying or disassembling this product can cause

electric shock, malfunction of or damage to this product

Do not work on piping and wiring

with wet hands

Wet hands may result in

electric shock

DON’T

Use an

appropriate device

to carry and install the LF232.

If this product

falls to the ground

, injury, or malfunction of or damage to the product, can be caused.

Ground

the LF232

independently from power equipment

Type D (100 ohm or less ground resistance)

Operating this product without grounding can cause

electric shock

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

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6F8A0917

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.

(8) 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 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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6F8A0917

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)

2.91(74)

0.43 (

12) hole

Wall surface, etc.

M10 bolt, etc.

0.43 (

12)

(M10 mounting holes)

2.91(74)

Mounting Hole Dimensions

Figure 4.1 Example of Panel and Wall Mounting

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6F8A0917

Unit: inch (mm)

2.91 (74)

M10 U bolt, etc

2” (50A) PIPE

Figure 4.2 Example of Pipe Mounting

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6F8A0917

5. Wiring

Cautionary notes on wiring

urn off mains power

before working on pipes.

Working on pipes while power is applied can cause

electric shock

Install a switch and fuse

to isolate the LF232 from mains power.

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

Do not work on piping and wiring

hands

with wet

Wet hands may result in

electric shock

DON’T

Do not conduct wiring work

with bare hands

Ground

the LF232

independently from power equipment

Type D (100 ohm or less ground resistance)

Operating this product without grounding can cause

electric shock

malfunction

DON’T

Remaining electric charge

even if power is turned off can still cause

electric shock

Do not modify or disassemble

the LF232 unnecessarily.

Use

crimped terminal lugs

for the terminal board and GND terminal.

Loose connections can cause

electric shock, fire from excessive current or system malfunction

DON’T

Modifying or disassembling this product can cause

electric shock, malfunction of or damage to this product

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

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

Overall diameter Description

Flow rate signal cable

2-core shielded chloroprene cabtyre cable

( Rubber covered cable )

Excitation cable 3-core chloroprene cabtyre cable

( Rubber covered cable )

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

Output signal cable

0.75mm

2mm

1.25mm

2mm

0.433

(11

−

13mm)

0.433

13mm)

0.433

(11

−

0.512 inch

13mm)

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

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

2 or more Power cable (CVV)

Class D grounding

(Ground resistance

100 or less)

Thick steel conduit

Connected detector

Flow rate signal cable

(2-core shielded cabtyre cable)

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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6F8A0917

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

or more. The size of the screw for external grounding 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.

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6F8A0917

5.4 Wiring Method

Do not conduct wiring work when

power is applied

Wiring while power is applied can cause

electric shock

DON’T

Do not work on piping and wiring

with wet hands

Wet hands may result in

electric shock

DON’T

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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6F8A0917

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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6F8A0917

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

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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6F8A0917

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

Cable connection

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

Correct

Packing

Incorrect

Figure 5.8 Cable Tightening

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6F8A0917

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

100 Ω or less). Use an IV wire 5.5mm

or more for grounding wire.

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.)

Converter terminal block

Y FG

External ground terminal

Twisting shields

Class D grounding

(Ground resistance 100 or less)

Input signal cable

Twisting shields Excitation cable

Ground terminal

A B X

Class D ground

(Ground resistance 100 or less)

Detector terminal block

Figure 5.9(a) Wiring between Detector and Converter

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6F8A0917

Converter terminal block

External ground terminal

Twisting shields

Input signal cable

Twisting shields

Class D grounding

(Ground resistance 100 or less)

A B X

Excitation cable

Ground terminal

Detector terminal block

Figure 5.9 (b) Wiring between Detector and Converter

(when grounding for detector is difficult)

Conductive material pipe

Example: Metal, etc.

Non-conductive material pipe

Example: Resin pipe or metal pipe which is internally coated with resin

Ground terminal Ground terminal

Grounding wire

When piping material is conductive

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

Class D ground

(Ground resistance

100 or less)

When piping material is non-conductive

Carry out class D grounding work

(grounding resistance 100 or less).

Figure 5.10 Detector Grounding Method

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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)

Transistor open collector

(Standard)

DC power supply

24VDC

CO1 CO2

Photo-coupler

(Option)

CI DI

Resistor

(Option)

DO2 to

DO4

DO1

Converter inside

* Note 1

Surge absorbing diode

Electromagnetic counter

* 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.

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

Ports on the housing

Attached cable connection specifications

Material

Waterproof grade

M27 fine pitch thread

Depth 0.433 inch (11mm)

Stainless steel

IP67

G1/2

Depth 0.433 inch (11mm)

Nylon resin

IP67

Appropriate cable diameter

Excitation and DI/DO cables

0.433

−

0.512 inch

(

−

13mm)

Other cables

0.394

−

0.472 inch

(

−

12mm)

Conduit connection port R (PT) 1/2 male thread

Blind plate (seal plate) Waterproof blind plate attached

0.433

−

0.512 inch

(

−

13mm)

Not provided

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.

Terminal block

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

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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

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

Model

Width of installation

Size of body （ W×H×L

（

W×H

）（

）

Note ）

LF502 LF502 (FS2 type) LF232*F

220×200 74×370

325×426×264 234.5×370×150

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

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6F8A0917

•

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

Joint of case side specifications of Materials attached cable ground

Grade of waterproofing

Diameter of conformity cable

Joint of conduit

LF502

(Please use only an attached cable ground)

Stainless steel

IP67

LF502 (type FS2)

M27 slim screw

Depth 0.433 inch (11mm)

Stainless steel

IP67

Excitation, optional cable

φ0.433～0.512 inch

(φ11～13mm)

Others

φ0.394～0.472 inch

(φ10～12mm)

Excitation, DI/DO cable

φ0.433～0.512 inch

(φ11～13mm)

Others

φ0.394～0.472 inch

(φ10～12mm)

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

LF232*F

G1/2

Depth 0.433 inch (11mm)

Nylon resin

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

high temperature fluid

is being measured.

DON’T

The fluid raises the main body temperature and can cause

burns

when touched.

For operation, follow the procedure described below.

Inspection for each part

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?

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.

Introducing water

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%.

Applying power supply

Is the power supply as specified?

Checking the converter settings

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

“Communications Function.”

Zero adjustment

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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6F8A0917

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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6F8A0917

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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6F8A0917

Functions of each switch

•

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

A1:EX CURR

(Menu display)

•

Writes data in the setting mode.

A1:EX CURR

0.2100A

(Setting mode)

B1:UNIT 1

(Data being changed) (Data has been changed)

•

Changes the numeric value or items in menu display and in the setting, calibration or measurement mode.

C2:RANGE 1

02.000 m/s

C2:RANGE 1

03.000 m/s

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

•

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

COUNT CTRL

F 1000 m 3

COUNT CTRL

F 1000 m 3 C

(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

D1: DAMPING

00.5 S

(Setting mode) (Enabled to change the setting value)

•

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

G1: COUNT RATE

1.23E-4 m

G1: COUNT RATE

1.23E-4 m

(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)

COUNT CTRL

F 0 m

(Resets the counter)

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6F8A0917

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

( Menu screen is displayed. Menu lock cancellation screen is not displayed. )

•

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

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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6F8A0917

(2) Total count display

F 9 9 9 9 9 9 9 9 C

“C” is displayed when counting is in progress.

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.

(3) Total flow value display

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

F 9 9 9 . 9 9 m l C

“C” is displayed when counting is in progress.

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

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

+ 9 9 9 . 9 9 m l C

“C” is displayed when counting is in progress.

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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6F8A0917

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 3

Total flow / total difference flow display becomes increases in increments of 0.0001 m

If the value reaches next count.

In the end, the display becomes

3 .

, the display changes to

. and the value at the

When the set count rate is 10 m 3

The display becomes

10 m 3 . and the value increases in increments of

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

→

Forward direction:

99999999

→

Reverse direction: − 100

Flow difference: 99999999

Forward direction: 0

Reverse direction:

−

100

Flow difference:

−

100

* 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.

Flow direction: Forward direction “ ” (blank)

Reverse direction “

−

”

(6) Custom unit display

- 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

/min value multiplied by the set coefficient

Flow direction: Forward direction “ ” (blank)

Reverse direction ”

−

”

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6F8A0917

(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

(Mode Switching, Setting Mode Operation, Total Counter Operation)

(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 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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6F8A0917

(2) Mode switching operation flow

MENU/ENT

, , and

CANCEL shown in the flow diagram below indicate the switch operations and when the indicated switch is pressed, the process moves to the item indicated by the corresponding arrow Æ .

Measurement mode

10.00 m/s

100.0 %

Press longer for 3 seconds.

*(Note 1)

*(Note 3)

ENTER111

000 V****

Input [111]

*(Note 2)

Mode Selection

Screen

>1:SET

2:CNT CTRL

(Point the cursor (>) to SET.)

A 1:EX CURRENT

A1:EX CURRENT

Not [111]

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)

*(Note 2)

Setting mode

(Menu display)

A2:METER SIZE

A0:MEAS MODE

M 1:MANUAL ZERO

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6F8A0917

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 for one minute while the mode selection screen or the 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.

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6F8A0917

Note1

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

−

10.00 m/s

100.0 %

Measured value being displayed (measurement mode)

ENTER111

000 V****

Pressing

MENU/ENT in the measurement mode for 3 seconds or more, the screen moves to the menu lock cancellation screen.

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

ENTER111

111 V****

Set the menu lock cancellation cord [111] by pressing and .

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

>1:SET

2:CNT CTRL

A1:EX CURRENT

B1:UNIT 1

Pressing

MENU/ENT in the measurement mode for 3 seconds or more, the screen moves to the mode selection screen.

Select 1:SET in the mode selection screen and press

MENU/ENT

. Then the menu screen appears.

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

Pressing , the function number (a combination of a letter and a number) changes.

B1:UNIT 1

Pressing , the cursor moves.

* If the cursor is positioned at the digit of number, pressing moves the cursor to the digit of letter.

C2:RANGE 1

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

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6F8A0917

To return from the menu display to the measurement mode

Switch operation Display example Description

C0: MEAS MODE

Set the digit of number for function number to “0” by pressing and (Note2). The digit of letter can be set to any letter.

10.00 m/s

100.0 %

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

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

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

Then pressing

MENU/ENT under that condition brings you back to the measurement mode with minimum operations.

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6F8A0917

Checking or changing the setting values

Switch operation Display example

C2: RANGE 1

Description

Menu display

Select the desired item to check or change using and .

C2 (RANGE 1) in this example.

C2: RANGE 1

2.00000 m/s

C2: RANGE 1

2.00000 m/s

C2: RANGE 1

3.00000 m/s

Press

MENU/ENT

to decide the item to check or change.

The cursor disappears and the currently set value appears for you to check. Pressing

CANCEL under this condition brings you back to the previous screen.

Pressing , the cursor appears at the position of the set value and enables the set value to be changed.

Pressing

CANCEL under this condition, the cursor disappears and the screen returns to the setting value check screen

(previous screen).

Setting value changeable condition

Pressing , the setting value increases.

* If the cursor is positioned at the unit, pressing moves the unit to the next unit.

C2: RANGE 1

3.0000 m/s

C2: RANGE 1

5.00000 m/s

( )

C2: RANGE 1

5.00000 m/s

C2: RANGE 1

2.00000 m/s

C2: RANGE 1

5.00000 m/s

Pressing , the cursor moves to the next digit.

Press and to change the setting value.

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

Pressing

MENU/ENT changes to the condition that data is temporarily set and the entire data blinks.

If you want to cancel the data change such as when the temporarily set data has an error, press

CANCEL and then the temporarily set data returns to the previously set value and the screen returns to the setting value changeable condition.

Pressing

MENU/ENT confirms the data and the changed data appears.

Pressing

CANCEL returns you to the menu screen.

C2: RANGE 1

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6F8A0917

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

ENTER111

000

V****

Press longer for

3 seconds.

Cancellation cord input

Input [111]

INPUT PASSWORD

000

Password input

>1:SET

2:CNT CTRL

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

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

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.

- 49 -

6F8A0917

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

Switch operation Display example

INPUT PASSWORD

000

Description

The password input screen appears from the measurement mode. The cursor appears.

Pressing

CANCEL

, the screen returns to the mode selection screen.

INPUT PASSWORD

100

Press to change the value to 1.

INPUT PASSWORD

100

120

123

INPUT PASSWORD

123

>1:SET

2:CNT CTRL

Change the number.

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

Repeat this operation until 123 appears on the screen.

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

Pressing

MENU/ENT again, the password will be written.

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.

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6F8A0917

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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6F8A0917

Note1

Example of totalizer operation

Switch operation Display example Description

−

10.00 m/s

100.0%

(Measurement mode)

ENTER111

000 V****

Pressing

MENU/ENT in the measurement mode for 3 seconds or more, the screen moves to the menu lock cancellation screen.

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

ENTER111

111 V****

Set the menu lock cancellation cord [111] by pressing and .

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

>1:SET

2:CNT CTRL

Press

MENU/ENT longer for 3 seconds.

1:SET

>2:CNT CTRL

Select

CANCEL in the mode selection screen.

COUNT CTRL

F 1000 m3

The totalizer operation screen appears.

COUNT CTRL

F 1000 m3 C

Pressing when the totalizer is stopped, the totalizer starts.

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

COUNT CTRL

F 1000 m3

Pressing while the totalizer is in operation, the totalizer stops.

* “C” mark disappears.

COUNT CTRL

F 0 m3

Pressing , the totalizer will be reset to zero.

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

10.00 m/s

100.0 %

Pressing

CANCEL returns you to the measurement mode.

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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6F8A0917

Note1

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

−

10.00 m/s

100.0 %

Measured value being displayed (measurement mode)

ENTER111

000 V****

Pressing

MENU/ENT in the measurement mode for 3 seconds or more, the screen moves to the menu lock cancellation screen.

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

ENTER111

111 V****

Set the menu lock cancellation cord [111] by pressing and .

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

>1:SET

2:CNT CTRL

INPUT SRV_CODE

000

Pressing

MENU/ENT for 3 seconds or more in the measurement mode, the screen moves to the mode selection screen.

Select 1:SET in the mode selection screen and press

MENU/ENT for 5 seconds or more, then the screen appears that is used to enter the service code to release the protection.

Pressing

CANCEL in the mode selection screen brings you back to the measurement mode.

A1:EX CURR

Enter the service code and if it is correct, the maintenance specific items in the setting menu can be accessed.

Pressing

CANCEL in the service code input screen brings you back to the mode selection screen.

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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6F8A0917

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”

1 2 3 4 5 6 7 8

Exciting current setting

Meter size *1 Exciting frequency *1

Flow direction setting *1

Main display unit

Sub display unit

Custom coefficient *1

Custom unit

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

Damping constant

Low cutoff value

Current output Display low setting for alarm *1 cut

On/Off

Output low limit setting

Still water zero adjustment

Digital output

1 *1

Digital output

2 *1

Digital output

3 *1

Digital output

4 *1

DO1 alarm output state *1

DO2 alarm output state *1

DO3 alarm output state *1

DO4 alarm output state *1

Digital input 1

Digital input 2

DI1 control signal level setting *1

DI2 control signal level setting *1

Count rate *1 Pulse width setting mode

Preset count value *1

Preset output setting *1

High limit alarm On/Off

High high limit alarm

On/Off *1

Fluid empty alarm *1

Rate-of-chang e limit

High limit value setting

High high limit value setting *1

Self-diagnosis

On/Off *1

Control time

Fixed value output *1

Zero offset

Fixed current

Low limit alarm On/Off

Low low limit value On/Off

Low low limit value setting

Alarm output preset *1

Low limit value setting

Flow value calibration *1

50%

Flow value calibration

100%

Flow value calibration *1

Exciting current monitor

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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6F8A0917

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

8.2.1 Exciting current value

A1: EX CURR

Display example

0.2100 A

A2: METER SIZE 50 mm

8.2.6 Normal display unit

A3: EX FREQ

A4: FLOW DIRCTN

A5: PASSWORD

B1: UNIT 1

24 Hz

1:NORMAL

123

m3/h

8.2.7 Custom unit setting

8.2.8

Range type

Span value

Hysteresis

8.2.11 Current output setting for alarm

8.2.12 Display low cut On/Off

8.2.13 Output low limit setting

8.5.1 Still water zero adjustment

Digital output function

Alarm output state

8.2.14

Digital input function

Control signal level setting

8.2.15

Count rate

Pulse width mode

Pulse width

B3: CUSTOM DATA

B4: CUSTOM UNIT

C1: RANGE TYPE

C2: RANGE 1

C6: RANGE HYST

D1: DAMPING

D2: LOW CUT

D3: ALM mA SET

D4: DSP LOW CUT

D5: LOW LIMIT

E1: ZERO ADJUST

F1: DO1 FUNCT

F5: DO1 ALM STS

G1: DI1 FUNCTN

G3: DI1 DET LV

H1: COUNT RATE

H2: PLS MODE

H3: PLS WIDTH

12340.00

TEST123

1:SINGLE

01.000 m3/h

05.0 %

05.0 s

05.0 %

2: 4.0mA

1: ON

1: 4.0mA

0.1 %

1:HIGH ALM

1:NORMAL CLOSE

2:CNT STA/STP

2:H LEVEL

1.00000 m3

1:AUTO

020 ms

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6F8A0917

No.

8.2.16

Setting item

Preset count value

Output function setting

High/Low limit alarm On/Off

High/Low limit alarm value

8.2.17

8.2.20

High high/Low low limit alarm On/Off

High high/Low low limit alarm value

8.2.18 Fluid empty alarm

Self-diagnosis On/Off

8.2.19

Alarm output factor setting

Rate-of-change limit value

Control time

8.4 Fixed value output (Loop check)

Display example

I1: PRESET CNT

I2: PRESET FNC

00009000

1:HOLD

J1: H ALM SET

J2: H ALM VAL

1:ON

+100.0 %

K1: HH ALM SET

K2: HH ALM VAL

L1: EMPTY ALM

L2: SELF CHECK

L3: ALM PRESET

M1: LIMIT RATE

M2: LIMIT TIME

N1: FIXED OUT

N2: FIXED CURR

N3: FIXED PULSE

8.5.2 Zero offset adjustment

O1: MANUAL ZERO

8.2 Parameters Check / Change

1:ON

+110.0 %

1:NORMAL

1:ON

1:WITHOUT EMP

05.5 %

01 s

OFF

20.0 mA

1000 pps

-000.1 %

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

Select A1: EX. CURR. from the setting item selection menu.

The currently set exciting current value appears.

A1: EX. CURR.

Returns to the menu of setting item selection.

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6F8A0917

Changing the exciting current value

To change 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 value 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

A1: EX. CURR.

0.1900A

Description

Select A1:EX. CURR. from the setting item selection menu.

The currently set exciting current value (0.1900A in this example) appears.

A1: EX. CURR.

0.1900A

The cursor appears.

Press further to move the cursor to the desired digit.

A1: EX. CURR.

0.2900A

0.2100A

0.2150A

A1: EX. CURR.

0.2150A

Change the number of the digit.

To change the number of other digit, press to move the 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

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

A1: EX. CURR.

Returns to the menu of setting item selection.

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

•

For small and medium meter size detectors (LF232*A)

For large meter size detectors (LF232*B)

For partially filled pipes detectors (LF232*F)

0.0500A to 0.2300A

0.0500A to 3.000A

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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6F8A0917

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

A2: METER SIZE

50 mm

Select A2: METER SIZE from the setting item selection menu.

The currently set meter size of the detector appears.

A2: METER SIZE

Returns to the menu of setting item selection.

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6F8A0917

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

Select A2: METER SIZE from the setting item selection.

The currently set meter size (50mm in this example) appears.

A2: METER SIZE

50 mm

The cursor appears.

A2: METER SIZE

100 mm

A2: METER SIZE

100 mm

Change the set value for meter size to 100mm.

The set value for meter size can be changed using switch.

(Note 1)

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

Press

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

A2: METER SIZE

Returns to the menu of setting item selection.

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

2.5mm

600mm

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

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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6F8A0917

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

Zero-point stability Good

6Hz 12Hz 24Hz

Response Good

Fluid noise immunity Good

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

Detector combined

LF470

LF150

Meter size

1/10",1/6”,1/4"

(

2.5 to 6 mm)

26” to 120” (500 to 3000 mm)

Corresponding exciting frequency

6Hz 12Hz 24Hz

○

◎

○

−

◎

−

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

◎ Factory setting

○ Combination allowed

−

Combination not allowed

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.

A3: EX. FREQ.

Returns to the menu of setting item selection.

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6F8A0917

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

A3: EX. FREQ.

24 Hz

Description

Select A3: EX FREQ. from the setting item selection menu.

The currently set exciting frequency (24Hz in this example) appears.

A3: EX. FREQ.

24 Hz

The cursor appears.

A3: EX. FREQ.

12 Hz

A3: EX. FREQ.

12 Hz

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.

Press

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

A3: EX. FREQ.

Returns to the menu of setting item selection.

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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The flow direction of fluid can be set.

Normally use the flowmeter under the condition of NORMAL.

Selection item

1: NORMAL

2: SWITCH

Description

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

A4: FLOW DIRCTN

1:NORMAL

Description

Select A4: FLOW DIRCTN from the setting item selection menu.

The currently set flow direction appears.

A4: FLOW DIRCTN

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

A4: FLOW DIRCTN

1:NORMAL

Description

Select A4: FLOW DIRCTN from the setting item selection menu.

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

A4: FLOW DIRCTN

1:NORMAL

The cursor appears.

A4: FLOW DIRCTN

2:SWITCH

Change the flow direction to SWITCH.

A4: FLOW DIRCTN

2:SWITCH

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

Press

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

A4: FLOW DIRCTN

Returns to the menu of setting item selection.

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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

Select A5: PASSWORD from the setting item selection menu.

The currently set password appears.

A5: PASSWORD

123

A5: PASSWORD

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

A5: PASSWORD

123

Description

Select A5: PASSWORD from the setting item selection menu.

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

The cursor appears.

A5: PASSWORD

423

Press to change the number of the 3rd digit of the password from the right to 4.

A5: PASSWORD

423

Move the cursor to the 2nd digit.

A5: PASSWORD

453

A5: PASSWORD

453

Press switch to change the number of the 2nd digit of the password to 5.

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

Press

MENU/ENT again to writer the data. Then the cursor disappears and the display returns to the condition that the setting value is displayed.

A5: PASSWORD

Returns to the menu of setting item selection.

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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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

/s, m

/min, m

3 l/s, l/min, l/h, l/d

/h, m

/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

•

Volumetric flow: m

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

•

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.

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

Select B1: UNIT 1 from the setting item selection menu.

The currently set main indicating unit appears.

B1: UNIT 1

Returns to the menu of setting item selection.

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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

B1: UNIT 1

Description

Select B1: UNIT 1 from the setting item selection menu.

The currently set main indicating unit (% in this example) appears.

B1: UNIT 1

The cursor appears.

B1: UNIT 1

ml B

Change the volumetric unit to ml. (Note 1)

B1: UNIT 1

ml B

Move the cursor to the position of time unit.

B1: UNIT 1

ml/s

Change the time unit to s. (Note 2)

B1: UNIT 1

ml/s

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

Press

MENU/ENT 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

Returns to the menu of setting item selection.

Note 1: Volumetric unit is displayed cyclically as follows:

% m

3 l ml gal bbl qt pt

RANGE COUNT

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

/s /min /h /d ft/s

(Space) 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

B1: UNIT 1

Description

Select B1: UNIT 1 from the setting item selection menu.

The currently set main indicating unit (m

F in this example) appears.

B1: UNIT 1

The cursor appears.

B1: UNIT 1

Move the cursor to the position of time unit.

B1: UNIT 1

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

B1: UNIT 1

m 3 B

B1: UNIT 1

m 3 B

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.

Press

MENU/ENT 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

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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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

/min

Custom coefficient

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.

Alphabetic letters (lower case letters) : a

−

Alphabetic letters (upper case letters) : A

−

Symbol: ( ) ····· Parentheses

··········· Period (dot)

⋅

··········· Point

··········· Colon

·········· Equal

−

·········· Minus (hyphen)

········· Space (blank)

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Checking the coefficient of custom unit

Proceed as follows to check the coefficient of custom unit.

Switch operation Display example

B3: CUSTOM DATA

12340.00

Description

Select B3: CUSTOM DATA from the setting item selection menu.

The currently selected coefficient appears.

B3: CUSTOM DATA

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

B3: CUSTOM DATA

1.000000

Description

Select B3: CUSTOM DATA from the setting item selection menu.

The currently set coefficient appears.

▲

B3: CUSTOM DATA

1.000000

B3: CUSTOM DATA

1.200000

↓

1.250000

B3: CUSTOM DATA

1.250000

The cursor appears.

Press further to move the cursor to the desired digit to change.

Change the number of the digit.

To change other digit, press to move the cursor to that digit 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.

Press

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

B3: CUSTOM DATA

Returns to the menu of setting item selection.

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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

B4: CUSTOM UNIT

AAA/BBB

Description

Select B4: CUSTOM DATA from the setting item selection menu.

The currently set unit appears.

B4: CUSTOM UNIT

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

B4: CUSTOM UNIT

AAA/BBB

Description

Select B4: CUSTOM UNIT from the setting item selection menu.

The currently set unit appears.

B4: CUSTOM UNIT

AAA/BBB

B4: CUSTOM UNIT

XAA/BBB

↓

XXX/ZZZ

B4: CUSTOM UNIT

XXX/ZZZ

The cursor appears.

Press further to move the cursor to the desired digit to change.

Change the character of the digit. (Note 1)

To change other digit, press to move the cursor to that digit 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.

Press

MENU/ENT again to write the data. Then the cursor disappears and the display returns to the condition that the set value is displayed.

B4: CUSTOM UNIT

Returns to the menu of setting item selection.

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

Alphabet letter (lowercase) Alphabet letter (uppercase)

Symbol Number

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Value

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

1:SINGLE

2:4F-0R

3:2F-2R

4:EXT.2F-0R

5:EXT.2F-2R

6:EXT.4F-0R

RANGE TYPE

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 (m

/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

/s, m

/min, m

/h, m

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

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

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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

: Range type setting

C2: RANGE 1

: Range 1 span value and unit setting

C3: RANGE 2

: Range 2 span value

C4: RANGE 3

: Range 3 span value

C5: RANGE 4

: Range 4 span value

C6: RANGE HYST

: 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

Switch operation Display example

C2: RANGE 1

02.000 m/s

Description

Select C2:RANGE 1 from the setting item selection menu.

The currently set Range 1 span value appears.

C2: RANGE 1

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

C1: RANGE TYPE

1:SINGLE

Description

Select C1: RANGE TYPE from the setting item selection menu.

The currently set range type (1:SINGLE) appears.

C1: RANGE TYPE

1:SINGLE

The cursor appears.

C1: RANGE TYPE

3:2F-2R

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

C1: RANGE TYPE

3:2F-2R

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

Press

MENU/ENT again to write the data. Then the cursor disappears and the display returns to the condition that the set value is displayed.

C1: RANGE TYPE

Returns to the menu of setting item selection.

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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

C2: RANGE 1

2.0000 m3/h

Description

Select C2: RANGE 1 from the setting item selection menu.

The currently set span value for Range 1 (2.0 m

/h in this example) appears.

C2: RANGE 1

2.0000 m3/h

C2: RANGE 1

2000.0 l/h

↓

33.333 l/min

The cursor appears.

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.)

C2: RANGE 1

33.333 l/min

Move the cursor to the desired digit to change.

C2: RANGE 1

13.333 l/min

↓

100.00 l/min

C2: RANGE 1

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.

Press

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

C2: RANGE 1

Returns to the menu of setting item selection.

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

Volumetric unit m 3 l qt pt ml ft gal m bbl

Time unit

/min

•

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

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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

C6: RANGE HYST

03.0 %

Description

Select C6: RANGE HYST from the setting item selection menu.

The currently set hysteresis value appears. (Note)

C6: RANGE HYST

03.0 %

The cursor appears.

C6: RANGE HYST

03.0 %

Move the cursor to the desired digit to change.

C6: RANGE HYST

05.0 %

C6: RANGE HYST

05.0 %

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.

Press

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

C6: 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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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

Select D1: DAMPING from the setting item selection menu.

The currently set damping constant appears.

D1: DAMPING

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

D1: DAMPING

00.5 s

Description

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 further to move the cursor to the desired digit to change.

D1: DAMPING

00.5 s

D1: DAMPING

10.5 s

10.0 s

D1: DAMPING

10.0 s

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 these.

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

Press

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

D1: DAMPING

Returns to the menu of setting item selection.

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 %

Select D2: LOW CUT from the setting item selection menu.

The currently set low cutoff value appears.

D2: LOW CUT

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

D2: LOW CUT

01.0 %

Description

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 further to move the cursor to the desired digit to change.

D2: LOW CUT

01.0 %

D2: LOW CUT

03.0%

D2: LOW CUT

03.0 %

Change the number of the digit.

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

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

Press

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

D2: LOW CUT

Returns to the menu of setting item selection.

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

1:UNDER 3.0mA

2:4.0mA

3:HOLD

4:OVER 24.0mA

Current output value when an alarm occurs

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

D3: 4-20 ALM.OUT

2:4.0mA

Description

Select D3: 4

−

20 ALM. OUT from the setting item selection menu.

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

D3: 4-20 ALM.OUT

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

D3: 4-20 ALM.OUT

2:4.0mA

Description

Select D3: 4

−

20 ALM. OUT from the setting item selection menu.

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

D3: 4-20 ALM.OUT

2:4.0mA

The cursor appears.

D3: 4-20 ALM.OUT

4:OVER 24.0mA

Press to select 4: OVER 24.0mA.

D3: 4-20 ALM.OUT

4:OVER 24.0mA

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

Press

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

D3: 4-20 ALM.OUT

Returns to the menu of setting item selection.

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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

1: ON

2: OFF

Display low cutoff

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

D4: DSP LOW CUT

2:OFF

Description

Select D4: DSP LOW CUT from the setting item selection menu.

The currently set display low cut On/Off status appears.

D4: DSP LOW CUT

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

D4: DSP LOW CUT

2:OFF

Description

Select D3: 4

−

20 ALM. OUT from the setting item selection menu.

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

D4: DSP LOW CUT

2:OFF

The cursor appears.

D4: DSP LOW CUT

1:ON

Press to select 1:ON.

D4: DSP LOW CUT

1:ON

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

Press

MENU/ENT again to write the data. Then the cursor disappears and the display returns to the condition that the set value is displayed.

D4: DSP LOW CUT

Returns to the menu of setting item selection.

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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%)

* 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

Select D5: LOW LIMIT from the setting item selection menu.

The currently set output low limit value appears.

D5: LOW LIMIT

1:4.0mA

D5: LOW LIMIT

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

Select D5: LOW LIMIT from the setting item selection menu.

The currently set output low limit value appears.

D5: LOW LIMIT

1:4.0mA

The cursor appears.

D5: LOW LIMIT

2:3.2mA

Press to select 2:3.2mA.

D5: LOW LIMIT

2:3.2mA

D5: LOW LIMIT

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

Press

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

Returns to the menu of setting item selection.

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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

1: NO USE

2: HIGH ALM

3: HH ALM

4: LOW ALM

5: LL ALM

Not used

High limit alarm output

High-high limit alarm output

Low limit alarm output

Low-low limit alarm output

6: RNG SIG 1

7: RNG SIG 2

8: PRESET

9: CONV. ALM

Range output No.1

Range output No.2

Preset counter output

Converter error alarm output (Note 3)

A: EMPTY ALM Fluid empty alarm output

B: PULSE OUT Pulse output (Note 1)

C: PULSE FRD

D: PULSE REV

Forward flow pulse output

Reverse flow pulse output

DO1 DO2

(Note 2)

DO3 to DO4

−

○ : Enabled

−

: Disabled

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.”

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

1: NORMAL CLOSE

2: NORMAL OPEN

Alarm output operation

Normal: Contact closed, When alarm occurs: Contact open

Normal: Contact open, When alarm occur: Contact closed

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Digital Input Function

DI FUNCT.

1: NO USE

2: C STA/STP

3: C RES/STA

4: RANGE SW1

5: ZERO ADJ

6: FIXED OUT

7: RANGE SW2

Digital input function

Not used

Totalizer Start/Stop control

Totalizer Reset/Start control

Multi-range external switching signal 1

Still water zero adjustment start

Fixed-value output mode control

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

1: L LEVEL

2: H LEVEL

Control signal level

Low level active

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

Operation when control signal is input

L LEVEL

H LEVEL

L LEVEL

H LEVEL

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

Digital Output 2

Digital Output 3

Digital Output 4

Digital Output alarm state 1

Digital Output alarm state 2

Digital Output alarm state 3

Digital Output alarm state 4

Digital Input 1

Digital Input 2

Digital Input control signal level 1

Digital Input control signal level 2

F1: DO1 FNCTN

F2: DO2 FNCTN

F3: DO3 FNCTN

F4: DO4 FNCTN

F5: DO1 ALM STS

F6: DO2 ALM STS

F7: DO3 ALM STS

F8: DO4 ALM STS

G1: DI1 FNCTN

G2: DI2 FNCTN

G3: DI1 DET LEV

G4: DI2 DET LEV

Switch operation Display example Description

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.

F1: DO1 FNCTN

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

Digital Output 2

Digital Output 3

Digital Output 4

Digital Output alarm status 1

Digital Output alarm status 2

Digital Output alarm status 3

Digital Output alarm status 4

Digital Input 1

Digital Input 2

Digital Input control signal level 1

Digital Input control signal level 2

F1: DO1 FNCTN

F2: DO2 FNCTN

F3: DO3 FNCTN

F4: DO4 FNCTN

F5: DO1 ALM STS

F6: DO2 ALM STS

F7: DO3 ALM STS

F8: DO4 ALM STS

G1: DI1 FNCTN

G2: DI2 FNCTN

G3: DI1 DET LEV

G4: DI2 DET LEV

Switch operation Display example Description

Select F1: DO1 FNCTN from the setting item selection menu.

The currently set function of Digital Output 1 appears.

F1: DO1 FNCTN

1:HIGH ALM

F1: DO1 FNCTN

1:HIGH ALM

The cursor appears.

F1: DO1 FNCTN

A:EMPTY ALM

Select the output function A:EMPTY ALM.

F1: DO1 FNCTN

A:EMPTY ALM

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

Press

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

F1: DO1 FNCTN

Returns to the menu of setting item selection.

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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 (1m

/s), the settable count rate is as follows:

3,600,000 pulses/h = 0.001m

3.6 pulses/h = 1,000m

= 1 l (liter)

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.

1:AUTO Pulse width automatic setting

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

2:MANUAL Pulse width manual setting

Pulse width set by pulse width setting

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.

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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

/h (1m

Count rate: 0.001m

/s)

Since the count rate is 3,600 m

0.001(m

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

/h (1m

Count rate: 1000m

/s)

Since the pulse count is 3,600m

1000m

= 3.6 pulses/h (0.001 pulse/s), the full-scale period is 1s

0.001 = 1000s.

Therefore, the pulse width becomes 1000s

0.4 = 400s. However, since the maximum value is 500ms, the pulse width becomes 500ms.

Example 3 In the case of the following:

Rage: 3,600m

Count rate: 1m

/h (1m

/s)

Pulse width is set to 0ms

Since the pulse count is 3,600m

3 period is 1s

1 = 1s.

= 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

Pulse width

H2: PLS MODE

H3: PLS WIDTH

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

Returns to the menu of setting item selection.

Changing the count rate

The following is an example to change the count rate from 0.01m

to 200 l (liter).

Switch operation Display example

H1: COUNT RATE

1.00000 m3

Description

Select H1: COUNT RATE from the setting item selection menu.

The currently set count rate appears.

H1: COUNT RATE

1.00000 m3

The cursor appears.

Press further to move the cursor to the digit of unit.

H1: COUNT RATE

1000.00 l

↓

200.000 l

H1: COUNT RATE

200.000 l

Change the unit to l.

Then press to move the cursor to the desired digit to change 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

MENU/ENT again to write the data. Then the cursor disappears and the display returns to the condition that the set value is displayed.

H1: COUNT RATE

Returns to the menu of setting item selection.

Note: The indicting units for count rate are displayed cyclically as shown below. m 3 l ml 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

Select H2: PLS MODE from the setting item selection menu.

The currently set pulse width mode setting appears.

H2: PLS MODE

2:MANUAL

H2: PLS MODE

2:MANUAL

The cursor appears.

H2: PLS MODE

1:AUTO

Press to select 1:AUTO.

H2: PLS MODE

1:AUTO

H2: PLS MODE

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

Press

MENU/ENT again to write the data. Then the cursor disappears and the display returns to the condition that the set value is displayed.

Returns to the menu of setting item selection.

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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

Select H3: PLS WIDTH from the setting item selection menu.

The currently set pulse width appears.

H3: PLS WIDTH

100.0 ms

The cursor appears.

Press further to move the cursor to the desired digit to change.

H3: PLS WIDTH

200.0 ms

↓

250.0 ms

H3: PLS WIDTH

250.0 ms

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.

Press

MENU/ENT again to write the data. Then the cursor disappears and the display returns to the condition that the set value is displayed.

H3: PLS WIDTH

Returns to the menu of setting item selection.

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.

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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

2: 50ms PULSE

Output level is held

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 n

. (If a value not satisfying this condition is set, the preset output timing may be shifted when the totalizer overflows.)

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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

Select H1:PRESET from the setting item select menu.

The currently set preset count value appears.

I1: PRESET CNT

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

I1: PRESET

00000500

Description

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 further to move the cursor to the desire digit to change.

I1: PRESET

00000500

I1: PRESET

00001500

00001000

I1: PRESET

00001000

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

Press

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

I1: PRESET

Returns to the menu of setting item selection.

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Changing the preset output function

The following is an example to show how to change the preset output function from Output state hold (1/HOLD) to One-shot pulse output (2:50ms PULSE).

Switch operation Display example

I2: PRESET FNC

1:HOLD

Description

Select I2:PRESET FNC from the setting item selection menu.

The currently set preset count output function (HOLD in this example) appears.

I2: PRESET FNC

1:HOLD

The cursor appears.

I2: PRESET FNC

2:50ms PULSE

Press to select the setting code 1:50ms PULSE.

I2: PRESET FNC

2:50ms PULSE

The display blinks and the set value is displayed for confirmation

Press

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

I2: PRESET FNC

Returns to the menu of setting item selection.

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8.2.17 Flow Rate High/Low limit Alarm

The flow rate high/low limit alarm is the function to generate an alarm when the instantaneous flow rate exceeds a preset high limit value (or low limit value).

When an alarm is generated, an alarm message is displayed and a signal can be output through DO.

Two outputs are provided each for high limit value and low limit value (4 outputs in total of high limit, high-high limit, low limit and low-low limit) and an alarm output can be sent out separately.

The following parameters can be set here:

(1) High limit alarm On/Off

(2) High limit value

(3) Low limit alarm On/Off

(4) Low limit value

(5) High-high limit alarm On/Off

(6) High-high limit value

(7) Low-low limit alarm value On/Off

(8) Low-low limit value

Note

•

To output a high/low limit alarm through DO, 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.”

High/low limit alarm On/Off

Whether the high/low limit alarm is used or not can be selected

1: ON

2: OFF

Alarm function provided

If the flow rate exceeds a selected high limit value (or low limit value), an alarm is generated.

Alarm function not provided

The selected alarm will not be generated.

High/low limit value

A flow rate value (high/low limit value) to generate an alarm is set in percent of the maximum range (Range 1) flow rate value.

The high/low limit alarm value can be set within the range of

−

10% to 110% in increments of 0.5%.

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Checking the high/low limit alarm setting

Proceed as follows to check the high/low limit alarm setting.

The following is how to check whether the high limit alarm is provided (On) or not (Off).

To check other setting values, select the following function numbers:

High limit value

Low limit alarm On/Off

Low limit value

High-high limit alarm On/Off

High-high limit alarm

Low-low limit alarm On/Off

Low-low limit value

J2: H ALM VAL

J3: L ALM SET

J4: L ALM VAL

K1: HH ALM SET

K2: HH ALM VAL

K3: LL ALM SET

K4: LL ALM VAL

Switch operation Display example Description

J1: H ALM SET

1:ON

Select J1: H ALM SET from the setting item selection menu.

The currently set high limit alarm On/Off setting appears.

J1: H ALM SET

Returns to the menu of setting item selection.

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Changing the high/low limit alarm On/Off

The following is an example to change the high limit alarm setting from OFF to ON.

To change other high/low limit alarm On/Off setting, select the following functions.

High limit alarm On/Off

Low limit alarm On/Off

High-high limit alarm On/Off

Low-low limit alarm On/Off

J1: H ALM SET

J3: L ALM SET

K1: HH ALM SET

K3: LL ALM SET

Switch operation Display example Description

J1: H ALM SET

2:OFF

Select J1: H ALM SET from the setting item selection menu.

The currently set On/Off setting for high limit alarm appears.

J1: H ALM SET

2:OFF

The cursor appears.

J1: H ALM SET

1:ON

Change the setting.

J1: H ALM SET

1:ON

J1: H ALM SET

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

Press

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

Returns to the menu of setting item selection

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Changing the high/low limit value

The following is an example to change the high limit value from +105% to +103%.

To change other high/low limit value setting, select the following functions.

Low limit value

High-high limit value

Low-low limit value

J4: L ALM SET

K2: HH ALM SET

K4: LL ALM SET

Switch operation Display example Description

J2: H ALM VAL

+105.0%

Select J2: H ALM VAL from the setting item selection menu.

The currently set high limit alarm value appears.

J2: H ALM VAL

+105.0%

The cursor appears.

Press further to move the cursor to the digit to change.

J2: H ALM VAL

+103.0%

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.

J2: H ALM VAL

+103.0%

The display blinks and the set value is displayed for conformation

Press

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

J2: H ALM VAL

Returns to the menu of setting item selection.

Note: If a value of 10% or less, or a value of 110% or more is tried to set, *L. Over SPEC. or *H. OVER SPEC. appears and the value returns to the previously set value.

Try to set a new value again.

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8.2.18 Fluid Empty Alarm

Fluid empty alarm is the function to generate an alarm when a condition is detected in which fluid is not filled or water level is not enough in the measuring pipe of the flowmeter.

If an alarm is generated, an alarm message is displayed and a signal can be output through DO.

Note

•

To output a fluid empty alarm through DO, 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.”

•

In the case of LF232*F; Fluid empty alarm function is not usable. Set this function 'OFF'.

Setting the fluid empty alarm

Whether the fluid empty alarm should be used or not, and its detection sensitivity can be selected.

EMPTY

1: OFF

2: NORMAL

3: SENSITIVE

4: SENSITIVE-H

Fluid empty alarm used

If a fluid empty condition is detected, an alarm will be output.

Fluid empty alarm setting

Fluid empty alarm not used

Fluid empty condition is not detected.

Sensitivity: Standard

Detection sensitivity is set to the standard level.

Sensitivity: High

Detection sensitivity is set to high sensitivity level.

Sensitivity: Higher

Detection sensitivity is set to higher sensitivity level.

* To use the fluid empty alarm, normally select 2:NORMAL (standard detection sensitivity). Select

3:SENSITVE or 4:SENSITIVE-H only when the fluid empty alarm is difficult to detect due to the condition of the fluid to be measured or its piping condition.

Checking the fluid empty alarm On/Off setting

Proceed as follows to check whether the fluid empty alarm is used (On) or not (Off).

Switch operation Display example Description

L1: EMPTY ALM

1:NORMAL

Select L1:EMPTY ALM from the setting item selection menu.

The currently set fluid empty alarm On/Off setting appears.

L1: EMPTY ALM

Returns to the menu of setting item selection.

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Changing the fluid empty alarm On/Off setting.

The following is an example to change the fluid empty alarm setting from Alarm On (1:NORMAL) to Alarm Off (0:OFF).

Switch operation Display example Description

L1: EMPTY ALM

1:NORMAL

Select L1:EMPTY ALM from the setting item selection menu.

Then the fluid empty alarm On/Off setting appears.

L1: EMPTY ALM

1:NORMAL

The cursor appears.

L1: EMPTY ALM

2:OFF

Press to select the fluid empty alarm Off

L1: EMPTY ALM

2:OFF

L1: EMPTY ALM

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

Press

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

Returns to the menu of setting item selection.

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8.2.19 Self-Diagnosis Function

Self-diagnosis function is the function to generate an alarm if an error is found from the result of diagnosis of internal circuits, memory, etc.

If an alarm is generated, an alarm message is displayed and a signal can be output through DO.

The following parameters can be set here:

(1) Self-diagnosis alarm On/Off

(2) DO alarm output factor setting

NOTE

•

To output a self-diagnosis alarm through DO, 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.”

Self-diagnosis function On/Off setting

Whether or not to use the self-diagnosis function can be selected.

Selection Self-diagnosis alarm is used or not

1: ON

Self-diagnosis function is used

An alarm is generated if an error is detected.

2: OFF

Self-diagnosis function is not used

Self-diagnosis will not be carried out.

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Alarm output factor setting

When the diagnosis alarm is output through DO, whether a fluid empty alarm should be added to the condition for alarm output can be selected.

1: WITHOUT EMP

Fluid empty alarm is not included

2: WITH EMP

Fluid empty alarm is included

List of alarm output factors

Diagnosis error items to output as a diagnosis alarm through DO are shown below.

Diagnosis error item

RAM error

ROM error

Exciting current value error

Exciting circuit wire broken

ADC error (flow measurement circuit error)

Parameter error

Fluid empty alarm

Diagnosis alarm output (DO)

WITHOUT EMP WITH EMP

−

: Diagnosis alarm is output through DO when an error is detected.

−

: Diagnosis alarm is not output through DO even if an error is detected.

(However, an error message is displayed)

Checking the self-diagnosis alarm setting

Proceed as follows to check the self-diagnosis function setting.

The following is how to check whether the self-diagnosis alarm is used (On) or not (Off).

To check the alarm output factors, select the function “L3: ALM PRESET.”

Switch operation Display example

L2: SELF CHECK

1:ON

Description

Select L2: SELF CHECK from the setting item selection menu.

Whether the self-diagnosis alarm is used (On) or not (Off) appears.

L2: SELF CHECK

Returns to the menu of setting item selection.

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Changing the self-diagnosis function setting

The following is an example to change the self-diagnosis function from Self-diagnosis function On

(1:ON) to Self-diagnosis function Off (2:OFF).

To change the setting for alarm output factors, select the function “L3: ALM PRESET.”

Switch operation Display example

L2: SELF CHECK

1:ON

Description

Select L2: SELF CHEK from the setting item selection menu.

Whether the self-diagnosis function is used (On) or not (Off) appears.

L2: SELF CHECK

1:ON

The cursor appears.

L2: SELF CHECK

2:OFF

Press to set the self-diagnosis function to OFF.

L2: SELF CHECK

2:OFF

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

Press

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

L2: SELF CHECK

Returns to the menu of setting item selection.

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8.2.20 Rate-of-Change Limit Value and Control Time

The rate-of-change limit is the function to prevent a sudden change in flow indication of the converter when the measurement flow signal contains excessive noise.

Damping constant is also effective to prevent indication variations by increasing its value but the rate of change limit control is effective against a sudden change in flow indication that the damping constant cannot eliminate.

The following parameters can be set here:

(1) Rate-of-change limit value

(2) Rate-of-change control time

Note: To use the rate-of-change limit function, it is necessary to set both (1) and (2).

If either one is set to zero (factory setting value), this function does not work

When not using the rate-of-change limit function, set zero to either one of these items.

Rate-of-change limit value

Indication change is controlled within the limit value* against variations of measurement flow signals.

* Indication variation per approx. 40ms will be controlled to within the limit value (in percent of span).

The rate-of-change limit value can be set within the range of 0 to 30% in increments of 0.1%.

In the case of multi-range setting, the value is indicated in percent of the range in operation.

If 0 is set, the rate-of-change limit function does not work.

Rate-of-change control time

If the time used to control the indication against variations of measurement flow signal exceeds the control time, the rate-of-change control will be turned off. (Flow indication will be output directly without the rate-of-change limit function.)

Control time can be set within the range of 0 to 20s in increments of 1s.

If 0 is set, the rate-of-change limit function does not work.

Checking the rate-of-change limit setting

Proceed as follows to check the rate-of-change limit setting.

How to check the limit value is shown below.

To check the control time, select the function “M2: LIMIT TIME.”

Switch operation Display example Description

M1: LIMIT RATE

05.0 %

Select M1: LIMIT RATE from the setting item selection menu.

The currently set rate-of-change limit value appears.

M1: LIMIT RATE

Returns to the menu of setting item selection.

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Changing the rate-of-change limit setting

The following is an example to change the limit value from 1.0% to 1.5%.

To change the control time, select the function “M2: LIMIT TIME.”

Switch operation Display example Description

M1: LIMIT RATE

1.0 %

Select M1: LIMIT RATE from the setting item selection menu.

The currently set rate-of change limit value appears.

The cursor appears.

Press further to move the cursor to the desired digit to change.

M1: LIMIT RATE

1.0%

M1: LIMIT RATE

1.5 %

M1: LIMIT RATE

1.5 %

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.

Press

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

M1: LIMIT RATE

Returns to the menu of setting item selection.

Note: If a value outside of the settable range is tried to set, *H. OVER SPEC. appears and the value returns to the previously set value. Try to set a new value again.

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8.3 Initial Settings When Shipped from the Factory

Initial settings used when shipped from the factory unless otherwise specified are shown below.

No. Parameter name

A5 Password

B1 Indicating unit setting (main unit)

B2 Indicating unit setting (sub display)

B4 Custom unit

C2 to 4 Ranges 1 to 4

Initial setting values

Adjusted value when shipped from the factory

(described on the detector nameplate)

Specified meter size when ordered

(described in the Test Record)

Recommended value for the detector combined

(See 8.2.3 “Exciting Frequency.”)

NORMAL

000 m

/h (If any range is specified, the same unit as that of the range)

% (If count rate is specified, the same unit as that of the count rate)

“ ” (7 blank spaces)

Range type specified when ordered

(If multi-range is not specified, Single range is set)

Values specified when ordered (described in the Test

Record. If not specified, Range 1 is the Toshiba standard range and Ranges 2 to 4 are zeros)

C5 Hysteresis

D2 Low cutoff value

D3 Output when an alarm occurs

D4 Display low cut

D5 Output low limit setting

F1 Digital Output 1

F2 to 4 Digital Outputs 2 to 4

F5 to 8 Digital Output 1 to 4 states

G1 to 2 Digital Inputs 1 to 2

G3 to 4 Digital inputs 1 to 2 detection levels

Meter size

16”(400mm) or less

Range of 1m/s or more 1.0s

Range of less than 1m/s

3.0s

Meter size 20” (500mm) or more

For partially filled pipes detectors

1.0 %

10s

4mA output

OFF

For partially filled pipes detectors: ON

4mA

PULSE OUT (Pulse Output)

NO USE (Not used)

NORMAL OPEN

NO USE (Not used)

H LEVEL

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No.

Parameter name

H1 Count rate

H2 Pulse width setting mode

Initial setting values

Meter size

1/10" to 1/4"

(

2.5 to 6 mm)

1/2" to 1 1/2”

(

15 to 40 mm)

0.01m

2" to 4” (

50 to 100mm) 0.1m

Meter size 6” to 24” (150 to 600mm)

Meter size 28” to 120” (700 to 3000mm)

10m

AUTO

00000000

Preset output function

High limit alarm setting

High limit alarm value

Low limit alarm setting

HOLD

OFF

0.0 %

OFF

Low limit alarm value 0.0 %

High-high limit alarm setting OFF

High-high limit alarm value

Low-low limit alarm setting

0.0 %

OFF

Low-low limit alarm value

Fluid empty alarm

Alarm output factor setting

0.0 %

ON Detection level: NORMAL

(In the case of LF232*F; OFF)

WITHOUT EMP (fluid empty alarm not included)

0.0 %

For partially filled pipes detectors: 10 %

0 s

For partially filled pipes detectors: 10 s

Fixed value output function

Zero offset

OFF

0.0 %

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8.4 Fixed Value Output

(Loop Check)

The fixed value output is the function to output a fixed current and/or a fixed pulse output independently of the flow rate signal.

The following parameters can be set here:

(1) Fixed value output On/Off setting

(2) Fixed current output value

(3) Fixed pulse output value

Notes

•

Fixed pulse output can be sent out only when DO1 or DO2 is set for pulse output.

•

When the mode is switched to the fixed output mode by DI function, the preset values of items (2) and (3) above will be output.

•

In the fixed output mode, the condition of DO output (other than pulse output) will be maintained.

Fixed value output On/Off setting

Fixed output mode can be selected by the setting as follows.

Selection Mode

1: ON

2: OFF

Fixed value output mode On

Current output and pulse output become fixed output values.

Fixed value output mode Off

Fixed output mode will be turned off and the mode goes to the normal measurement mode.

When the fixed value output is set to ON, the main indicating unit only is displayed and the current output set value is displayed in the lower line in the measurement mode.

Display example:

1.000 m/s

* FIX.OUT 20.0 mA

Flow velocity is displayed in main indicating unit

Fixed current value is displayed

Note: When power is turned off and on again, the fixed output On/Off setting will be turned off.

Fixed current output value

The current value used in the fixed output mode is set.

Fixed current output value can be set in the range of 3 to 24mA in increments of 0.1mA.

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Fixed pulse output value

The pulse frequency is set, which is used to output in the fixed output mode through the DO terminal where the pulse output function is set.

The fixed pulse output value can be set within the range of 0 to 1000pps in increments of 1pps.

Note: When the pulse output is sent out from DO2 terminal, up to 100pps can be output.

Checking the fixed output function setting

Proceed as follows to check the fixed output function.

How to check the fixed value out On/Off setting is shown here.

To check other settings, select the following functions:

Fixed current output value

Fixed pulse output value

N2: FIX CURR

N3: FIX PULSE

Switch operation Display example Description

Select N1: FIXED OUT from the setting item selection menu.

The currently set fixed value output On/Off setting appears.

N1: FIXED OUT

1:ON

N1: FIXED OUT

Returns to the menu of setting item selection.

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Changing the fixed output function

The following is an example to change the fixed output function from Fixed value output OFF to

ON and then go on to set the current output value and the pulse output value. To change the current output value or pulse output value independently, select the following function:

Fixed current output value

Fixed pulse output value

N2: FIX CURR

N3: FIX PULSE

Switch operation Display example Description

Select N1: FIXED OUT from the setting item selection menu.

The currently set fixed value output On/Off setting appears.

N1: FIXED OUT

2:OFF

N1: FIXED OUT

2:OFF

The cursor appears.

N1: FIXED OUT

1:ON

Select the fixed value output: ON.

N2: FIX. CURR.

10.0 mA

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

Press

MENU/ENT again to write the data. The cursor disappears and then the current output set value can be changed.

N2: FIX. CURR.

10.0 mA

Move the cursor to the desired digit to change.

N2: FIX. CURR.

20.0 mA

Change the number of the digit.

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

N3: FIX. PULSE

100 PPS

N3: FIX. PULSE

100 PPS

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

Press

MENU/ENT again to write the data. The cursor disappears and then the pulse output set value can be changed.

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

Press

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

N3: FIX. PULSE

Returns to the menu of setting item selection.

Note. If a value outside of the settable range is tried to set, the upper limit or lower limit value of the settable range will be forcibly set.

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Changing the fixed output constant

The following is an example to change the fixed pulse output value from 50pps to 100pps. To change the fixed current output value, select the function “L2: FIX. CURR.”

Switch operation Display example Description

L3: FIX. PULSE

0050 pps

Select L3: FIX. PULSE from the setting item selection menu.

The currently set fixed pulse output value appears.

L3: FIX. PULSE

0050 pps

The cursor appears.

Press further to move the cursor to the desired digit to change.

L3: FIX. PULSE

0150 pps

↓

0100 pps

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.

L3: FIX. PULSE

0100 pps

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

Pres

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

L3: FIX. PULSE

Returns to the menu of setting item selection.

Note: If you try to set a value outside of the settable range, the value will be forcibly set to the upper limit or the lower limit of the settable range.

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8.5 Zero Adjustment

8.5.1 Still Water Zero Adjustment

Still water zero adjustment must be performed when the fluid in the measuring pipe of the detector stays still.

Switch operation Display example Description

Note2

−

ENTER111

000

ENTER111

111

Pressing

MENU/ENT in the measurement mode for 3 seconds or more, the screen moves to the menu lock cancellation screen.

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

Set the menu lock cancellation cord [111] by pressing and .

* Pressing

CANCEL in the mode selection screen, the mode returns to the measurement mode.

Press

MENU/ENT for 3 seconds or more in the measurement mode and then the mode changes to the mode selection screen.

>1:SET

2:CNT CTRL

A1:EX CURRENT

Select 1:SET in the mode selection screen and then the menu screen appears.

E1: ZERO ADJUST

Press and so that the function number becomes E1:

ZERO ADJUST.

E1: ZERO ADJUST

01.0%

The current flow rate measured value in % unit appears.

(Check that the fluid to be measured stays still.)

ADJUST READY

01.0%

ADJUST READY appears and the system is ready for adjustment. (If “CANCEL” is pressed, Adjustment ready condition will be cancelled.)

About 3 to 6 seconds later, the still water zero adjustment ends and the measured flow value after adjustment appears.

E1: ZERO ADJUST

* ZERO ADJUST

−

10.00 m/s

100.0 %

E1: ZERO ADJUST

00.0%

Measured value being displayed (measurement mode)

Returns to the menu of setting item selection.

E1: ZERO ADJUST

Press and so that the number digit of the function number becomes 0.

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E0: MEAS MODE

Returns to the measurement mode (measured value display screen).

10.00 m/s

100.0 %

Note1: If the flow rate value is outside of the range of

1.25 m/s, the adjustment result will not be reflected on the flow rate measured value.

Note1:If the flow rate value is outside of the range of

1.25 m/s, the adjustment result will not be reflected on the flow rate measured value.

Note2: There is not this screen to the converter before serial No.072320999.

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This function is used to perform zero adjustment simply by comparing the output of the flowmeter with other process value without stopping the process flow.

If zero adjustment can be performed with still water condition, it is not necessary to set this adjustment value.

How to calculate the zero offset value

Zero offset is performed by setting the adjustment value.

The adjustment value can be obtained by the following equation:

Adjustment value (%) = {(Actual flow rate)

−

(LF232 measured value)}

* Calculate the value in percent of the setting range of Range 1.

(See the example below.)

(Example)

Actual flow rate obtained from other process value

LF232 measured value

Zero offset adjustment value

Flow rate

10.0 m

/min

10.5 m

/min

Value in percent of the set span

50.0 %

52.5 %

−

2.5 %

(If zero offset adjustment value is set to

−

2.5 %, the output of LF232 is shifted by

−

2.5% and 50.0 % output can be obtained.)

The zero offset adjustment value can be set within the range of

0.410ft/s (0.125 m/s) (

1.25% of the maximum range 32.8ft/s (10 m/s))

Note: If you perform still water zero adjustment, zero offset adjustment value becomes zero.

Checking the zero offset adjustment value

Proceed as follows to check the zero offset adjustment value.

Switch operation Display example

O1: MANUAL ZERO

+002.5 %

Description

Select O1: MANUAL ZERO from the setting item selection menu.

The currently set zero offset adjustment value appears.

O1: MANUAL ZERO

Returns to the menu of setting item selection.

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Changing the zero offset adjustment value

Changing the zero offset adjustment value from +1.0% to

−

2.5%.

Switch operation Display example Description

O1: MANUAL ZERO

+001.0%

Select O1: MANUAL ZERO from the setting item selection menu.

The currently set zero offset adjustment value appears.

O1: MANUAL ZERO

+001.0%

The cursor appears.

Press further to change the cursor to the desired digit to change.

O1: MANUAL ZERO

-001.0%

↓

-002.5%

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.

O1: MANUAL ZERO

-002.5%

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

Press

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

O1: MANUAL ZERO

Returns to the menu of setting item selection.

Note: If you try to set a value outside of the settable range, an error message of *H. OVER SPEC or *L. OVER

SPEC appears. Try to set a new value again.

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9. Mag-Prover Calibration

9.1 Calibration Items

The calibration mode of the LF232 flowmeter converter is used to check or perform zero and span calibration of the converter and check the exciting current. To change the mode to the calibration mode, select the setting item in accordance with the procedure in 7.3.2 “Setting Mode Operation.”

The procedure on the following pages is used to check or perform zero and span calibration of the converter and check the exciting current.

However, these values are already checked and calibrated when shipped from the factory. Do not change these settings unless it is necessary to calibrate in the field, etc.

No. Setting item Display example

9.2.1 0 % flow rate calibration

P1:FLOW CAL 0

9.2.2 50 % flow rate calibration

P2:FLOW CAL 50

9.2.3 100 % flow rate calibration

P3:FLOW CAL100

9.2.4

Checking the exciting current output value

P4:EX CURR DSP

0.0 %

50.0 %

100.0 %

0.2100 A

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9.2 Converter Check / Calibration

9.2.1 0% Flow Rate Calibration

(Zero Calibration)

Using Mag-Prover internal calibration circuit, 0% flow rate (hereafter called zero point) calibration can be performed.

Checking the zero point

Switch operation Display example Description

Select P1:FLOW CAL 0 from the calibration item selection menu.

Zero point using the simulation input appears.

P1:FLOW CAL 0

0.0 %

P1:FLOW CAL 0

Returns to the menu of calibration item selection.

Calibrating the zero point

Switch operation Display example

P1:FLOW CAL 0

0.1 %

Description

Select P1:FLOW CAL 0 from the calibration item selection menu.

Zero point using the simulation input appears.

ADJUST READY

0.1 %

Press . Then the display shown left appears and the system is ready for zero calibration. (Note 1)

−

P1:FLOW CAL 0%

* CAL. 0% ADJ.

The display shown left appears and zero calibration starts.

P1:FLOW CAL 0

0.0 %

About 3 to 6 seconds later (Note 2), the zero calibration ends and a new zero point appears.

P1:FLOW CAL 0%

Returns to the menu of calibration item selection.

Note 1: To cancel the adjustment from the condition of ADJUST READY, press

CANCEL

. The display returns to the condition where zero point using the simulation input is displayed.

Note 2: Calibration time differs depending on the exciting frequency.

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9.2.2 50% Flow Rate Calibration

50% flow rate value can be checked only.

Checking the 50% flow rate value

Switch operation Display example

P2:FLOW SIG 50

50.1 %

Description

Select P2:FLOW SIG 50 from the calibration item selection menu.

50% flow rate value using the simulation input appears.

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9.2.3 100% Flow Rate Calibration

(Span Calibration)

Using the Mag-Prover internal calibration circuit, 100% flow rate value (hereafter called the span value) calibration can be performed.

Checking the span value

Switch operation Display example

P3:FLOW CAL100

100.1 %

Description

Select P3:FLOW CAL 100 from the calibration item selection menu.

Span value using the simulation input appears.

P3:FLOW CAL100

Calibrating the span value

Returns to the menu of calibration item selection.

Switch operation Display example

P3:FLOW CAL100%

100.1 %

Description

Select P3:FLOW CAL 100 from the calibration item selection menu.

Span value using the simulation input appears.

ADJUST READY

100.1 %

Press . Then the display shown left appears and the system is ready for span calibration. (Note 1)

P3:FLOW CAL100

* CAL. 100% ADJ.

The display shown left appears and the span calibration starts.

−

P3:FLOW SCAL100

100.0 %

About 3 to 6 seconds later (Note 2), the span calibration ends and a new span value appears.

P3:FLOW CAL100

Returns to the menu of calibration item selection.

Note 1: To cancel the adjustment from the condition of ADJUST READY, press

CANCEL

. The display returns to the condition where 100% flow rate value using the simulation input is displayed.

Note 2: Calibration time differs depending on the exciting frequency.

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9.2.4 Checking the Exciting Current Value

The monitor value of the exciting current can be checked.

Checking the exciting current value

Switch operation Display example

P4:EX CURR DSP

0.2100 A

Description

Select P4:EX CURR DSP from the calibration item selection menu.

Span value using the simulation input appears.

P4:EX CURR DSP

Returns to the menu of calibration item selection.

* The exciting current value is adjusted when shipped from the factory. Contact your nearest Toshiba representative if any change is necessary.

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10. Function Description

The LF232 flowmeter converter is equipped with 4 digital outputs and 2 digital inputs (1 digital output as standard), enabling you to use these as various functions such as pulse output and alarm outputs.

Digital I/O functions are described below.

Functions Description

Flow totalization

Multiple ranges

Forward and reverse ranges

Totalizes flow volume in volumetric unit.

For totalized flow, a pulse output per each unit of flow volume can be sent out.

The operation to start, stop and reset the totalizer and pulse output can be controlled with Digital Input.

Measuring ranges can be switched in accordance with flow rate.

Measuring ranges can be switched automatically or by control using

Digital Inputs.

Forward and reverse direction flows can be measured.

Forward and reverse ranges can be combined with multiple ranges.

Flow rate High/Low limit

(High-high limit/Low-low limit) alarms

If the flow rate exceeds or lowers below the preset value, an alarm will be output.

2 high limit alarm outputs and 2 low limit alarm outputs, 4 alarm outputs in total, can be sent out.

Fluid empty alarm

Preset counter If the count of the totalizer exceeds the preset value, a signal is output.

Remote still water zero adjustment Still water zero adjustment can be controlled using Digital Inputs.

Fixed value output (loop output)

If the fluid to be measured flows out from the measuring pipe of the detector, an alarm is output.

(In the case of LF232*F, fluid empty alarm function is not usable.)

Converter error alarm

Fixed value for current output and pulse output can be sent out to perform a loop check for output lines.

The fixed value output mode can also be switched by control using

Digital Inputs.

If an error is detected such as memory error or excitation circuit error, an alarm is output.

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10.1 Digital I/O Specifications

The specifications of the digital I/O terminals of the LF232 converter are as follows:

Digital Outputs:

(DO1) Output type Transistor open collector (standard)

Number of outputs 1

Capacity 30 VDC, 200 mA maximum

(DO2 to DO4) Output type Solid-state contact output (non polarity) (option)

Number of outputs 3

Capacity 150 VDC, 150 mA maximum

150 VAC (peal value), 100 mA maximum

Digital Input (option):

(DI1, DI2) Signal type

Input resistance

Number of inputs 2

Voltage signal of 20 to 30 VDC

•

High input level: 20 to 30 VDC

•

Low input level: 2 VDC maximum

Approx. 2.7 k Ω

•

Each terminal can be set to select each function.

•

Terminal “CO2” is the common terminal of DO2 to DO4 and “CI” is the common terminal of DI1 and DI2.

•

Each terminal is isolated from internal circuit.

(Output terminals are not isolated between them.)

•

In the case of the standard specification (without digital I/O specification), a solid-state contact, photo-coupler and resistor are not provided internally.

Solid-state contact

(option)

Transistor open collector

(standard)

CO1 CO2

Photo-coupler (option)

Resistor

(option)

DI1, DI2

DO2 to

DO4

DO1

Converter inside

Voltage input

Contact output 2 (DO2 to DO4)

Contact output 1 (DO1)

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10.2 Totalizer and Pulse Output

Proceed as follows to use the totalizer and pulse output.

Count Rate and Pulse Width Settings

Follow the procedure in 8.2.15 “Count Rate (Pulse Rate) and Pulse Width” and set the flow rate per 1 count (1 pulse) (count rate), pulse width mode and pulse width.

* Count rate can be set within the range of 3.6 to 3,600,000 pulses/h (1/1000 to

1000 pulses/s) with respect to the set range. (Note 2)

* Pulse width will be set automatically if the pulse width mode is set to AUTO.

If you want to set the pulse width manually, the pulse width can be set between

0.3ms and 500ms. However, the pulse width must be 40% or less of the full-scale period. (Note 3)

For pulse width, check the acceptable signal width of the receiving instruments when you set the pulse width.

If the pulse output is not used, pulse width setting is not needed.

DO Setting

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output 1

(DO1) or Digital Output 2 (DO2) for pulse output.

If the pulse output is not used, DO setting is not needed.

DI Setting

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Input

(DI) function.

In the case of the converter without Digital Input (9th digit of the product code is

“1”), set “NO USE” (factory setting).

Indicating Unit Setting

Follow the procedure in 8.2.6 “Normal Indicating Unit” and set a totalization unit

, l, ml, gal, bbl, pt, qt or COUNT) for indicating unit.

If only the pulse output is used, pulse output can be sent out without setting an indicating unit but it is recommended that you set a totalization unit as indicating unit to check the operating condition.

Switching to the Measurement Mode

Follow the procedure in 7.3.1 “Mode Switching” and put the mode back to the measurement mode.

* To be continued to the next page.

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* Continued from the previous page

Clear (reset) the totalizer. (Note1)

Press switch to clear the count.

If you have changed the count rate, clear (reset) the count before you start the totalizer.

Start the totalizer. (Note1)

•

Press to start the totalizer.

Check that “C” is shown on the display indicating that counting is in progress.

Note 1: The LF232 converter has the function to start/stop the totalizing operation or clear the internal totalizer.

For details of how to operate the totalizer, see 7.3.4 “Totalizer Operation.”

Note 2: Example of count rate setting range

Count rate can be set in the range of minimum value (3,600,000 pulses/h) to maximum value (3.6 pulses/h) with respect to the set range

Example: When the range is 3,600m follows:

Minimum value: 3,600m

Maximum value: 3,600m

3 /h

3,600,000 pulses/h = 0.001m

3 /h (1m 3 /s), settable count rate is as

3.6 pulses/h = 1,000m

3 = 1 l (liter)

Note 3: Example of pulse width setting range (in the case of manual setting)

Pulse width can be set within the range of 0.3ms to 500ms in increments of 0.1ms.

However, the pulse width must be 40% or less of the full-scale period.

Example 1: In the case of the following:

Range: 3600m 3 /h (1m 3

Count rate: 0.001m

/s)

Since the count rate is 3,600 m 3 /h ÷ 0.001(m 3 ) = 3,600,000 pulses/h (1000 pulse/s), the full scale period is 1s ÷ 1000 = 1ms.

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

Example 2: In the case of the following

Range: 3,600m 3 /h (1m

Count rate: 1000m 3

3 /s)

Since the count rate is 3,600m 3 /h

1000m 3 = 3.6 pulses/h (0.001 pulse/s), the full scale period is 1s

0.001 = 1000s.

Therefore, pulse width becomes 1000s

0.4 = 400s.

However, since the maximum value is 500ms, pulse width becomes 500ms.

Example 3: In the case of the following

Range: 3,600m

Count rate: 1m 3

3 /h (1m 3 /s)

Pulse width is set to 0ms

Since the count rate is 3,600m full scale period is 1s ÷ 1 = 1s.

3 /h ÷ 1m 3 = 3600 pulses/h (1 pulse/s), the

Therefore, pulse width becomes 1s × 0.4 = 400ms.

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

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Totalizer operation using digital input signals

Totalizer and pulse output can be operated.

Remote operations of the totalizer and pulse output can be performed using the Digital Input signals.

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Input (DI) functions.

Operation using Digital Input signals

(Standard product, Control signal level: High level)

Digital Input function DI input

Totalizer Start/Stop

Totalizer Reset/Start

Low level

Totalizer, pulse output operation

Stops

High level Outputs

High level Clears (resets) the totalizer and stops

Low level Outputs

It is possible to reverse the DI control signal levels by setting the digital input control signal levels.

•

When high level (1:H LEVEL) is selected: The operation with the signal level is the same as the standard product shown in the above table.

•

When low level (0:L LEVEL) is selected: The operation with the signal level becomes as shown below.

Operation using Digital Input signals

(Control signal level: Low level)

Digital input function DI input

Totalizer Start/stop

Totalizer Reset/Start

Low level

Totalizer and pulse output operation

Outputs

High level Stops

High level Outputs

Low level Clears (resets) the totalizer and stops.

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Five types of multi-range functions can be set using the Range Type:

(1) Single direction, 4 ranges Internal automatic switching

(2) Forward and reverse directions, 2 ranges Internal automatic switching

(3) Single direction, 2 ranges External signal switching

(4) Forward and reverse directions, 2 ranges External signal switching

(5) Single direction, 4 ranges E xternal signal switching

To use the multi-range function, proceed as follows to set.

Range Setting

•

Follow the procedure in 8.2.8 “Span Value (Range)” and set the range in the following order.

1. Select the Range Type.

2. Set the span for Ranges 1 to 4.

3. Set the hysteresis value.

DO/DI Setting

•

Follow the procedure in 8.2.14 “Digital I/O Function” and set the DO for Range output.

•

When using the multi-range switching with external signals, set the DO for external range switching signals.

•

Requirements to combine the range signals (No.1 and No.2) to set the DO and DI differ depending on the Range Type. For details, see the explanations (1) to (5) on the following pages.

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Output performance when multiple ranges are used

(1) Single direction (internal automatic switching), 4 ranges

Output (%)

125

Hysteresis

(0 to 25%)

100

Range 4 Range 3 Range 2

Range 1

20mA

4mA

Reverse direction

Forward direction

Flow rate

Range output No. 1

Range output No. 2

OFF ON

OFF

•

Current output is 4mA as standard when fluid flows in reverse direction.

When the low cutoff function is not used (low cutoff setting is 0), it is possible to output the current output signal in linear scale up to 3.2mA or 2.4mA when fluid flows in reverse direction.

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(2) Forward and reverse directions (internal automatic switching), 2 ranges

Output (%)

125

Range 3 100 Range 1

Range 2

Range 4

Hysteresis

20mA

Range output No. 1

Range output No. 2

OFF

Output when switched from Reverse to

Forward direction

4mA

Reverse direction

Forward direction

ON ON

OFF

Flow rate

Output when switched from Forward to Reverse direction

Output Output

Low cutoff

1.25

Low cutoff

(Low cutoff 1.25)

Reverse direction

Forward direction

Range output

No. 2

4mA

Low cutoff

1.25

4mA

Flow rate

OFF

Range output

No. 2

(Low cutoff 1.25)

Reverse direction

Forward direction

Flow rate

OFF

From reverse direction range to forward direction range

From forward direction range to reverse direction range

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(3) Single direction (external signal switching), 2 ranges

Output (%)

125

100

Range 2 Range 1

Reverse direction

Forward direction

4mA

Flow rate

External range switching signal

(Range output No. 1)

H level input

L level input

OFF

•

Current output is 4mA as standard when fluid flows in reverse direction.

When the low cutoff function is not used (low cutoff setting is 0), it is possible to output the current output signal in linear scale up to 3.2mA or 2.4mA when fluid flows in reverse direction.

•

Works even if the range output is not used.

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(4) Forward and reverse directions (external signal switching), 2 ranges

Range 3 Range 4

Output (%)

125

100

Range 2 Range 1

4mA

Reverse direction 0 Forward direction

Flow rate

External range switching signal

(Range output No. 1)

(Range output No. 2)

L level input

OFF

H level input

•

Works even if the range output is not used.

Output when switched from Reverse to

Forward direction

H level input

OFF

L level input

OFF

Output when switched from Forward to Reverse direction

Output Output

Low cutoff

1.25

Low cutoff

(Low cutoff 1.25)

Reverse direction

Forward direction

Range output

No. 2

4mA

Low cutoff

1.25

4mA

Flow rate

OFF

Range output

No. 2

(Low cutoff 1.25)

Reverse direction

Forward direction

Flow rate

OFF

From reverse direction range to forward direction range

From forward direction range to reverse direction range

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(5) Single direction (external signal switching), 4 ranges

Output (%)

125

100

Range 4 Range 3 Range 2

Range 1

20mA

4mA

Reverse direction

Forward direction Flow rate

External range switching signal No. 1

External range switching signal No. 2

L level input H level input

H level input

H level input L level input

L level input

(Range output No. 1)

(Range output No. 2)

OFF

ON ON

OFF

•

Current output is 4mA as standard when fluid flows in reverse direction.

When the low cutoff function is not used (low cutoff setting is 0), it is possible to output the current output signal in linear scale up to 3.2mA or 2.4mA when fluid flows in reverse direction.

•

Works even if the range output is not used.

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10.4 Flow Rate High/Low Limit Alarm Output

Proceed as follows to use the flow rate high/low limit alarm.

High/Low Limit Alarm

Value Setting

•

Follow the procedure in 8.2.17 “Flow Rate High/Low alarm” and set the high limit alarm, high-high limit alarm, low limit alarm or low-low limit alarm to ON and set the alarm value.

For the alarm not used, set OFF to that alarm setting.

DO Setting

•

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output

(DO) for high limit output, high-high limit alarm output, low limit alarm output or low-low limit alarm output. In addition, for alarm output state, select Normally Open or Normally Closed.

Flow rate high/low limit alarm output performance

•

In the case of Single range

Output (%)

High limit set-point value

Hysteresis

2.5%

Low limit set-point value

Low limit alarm generated

High limit alarm generated

Low limit alarm generated

Time

* The output state when an alarm occurs becomes the state set for alarm output of digital output.

When the power supply of the converter is turned off, the contact is open.

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•

In the case of Multi-range setting

Output (%)

Range 2

High limit setpout value

Range 1 Range 2

Hysteresis

2.5%

Hysteresis

2.5%

Low limit setpoint value

Hysteresis

2.5%

Low limit alarm generated

High limit alarm generated

Low limit alarm generated

Time

* High/low limit alarm set-point value is a value indicated in percent of the Range 1.

* The output state when an alarm occurs becomes the state set for alarm output of digital output.

When the power supply of the converter is turned off, the contact is open.

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•

In the case of 2 high limit alarm points (high limit and high-high limit)

Output (%)

High-high limit setpoint

Hysteresis

2.5%

High limit set-point

High-high limit alarm generated

High limit alarm generated

Time

* The output state when an alarm occurs becomes the state set for alarm output of digital output.

When the power supply of the converter is turned off, the contact is open.

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Proceed as follows to use the fluid empty alarm.

(Note: In the case of LF232*F; Fluid empty alarm function is not usable. Set this function 'OFF'.)

Alarm Output Setting

•

Follow the procedure in 8.2.18 “Fluid Empty Alarm” and set the fluid alarm setting to ON (NORMAL, SENTITIVE or SENSITIVE-H).

DO Setting

•

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output

(DO) for fluid empty alarm output.

In addition, for alarm output state, select Normally Open or Normally Closed.

If only the fluid empty detection function is used and external contact output is not used, DO setting is not needed.

Output when an alarm is generated

•

4 to 20mA output: 4mA (standard)

* Current output value when an alarm is generated can be set by referring to 8.2.11 “Current Output Setting Used When an Alarm

Occurs.”

•

Totalizer, pulse output: Totalizing operation and pulse output stopped

•

Measured value display: Instantaneous flow rate is zero.

•

Contact output: When an alarm occurs, output contact closes (standard).

* Contact operation when an alarm occurs can be set according to the alarm output state described in 8.2.14 “Digital I/O Function”

Note: When the power supply of the converter is turned off, the contact is open.

* For how to use the fluid empty alarm, see Precautionary notes in 12. “Diagnosis and Alarms.”

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10.6 Preset Counter Output Function

A contact signal is output when the totalized flow count exceeds the preset value (preset count value).

Proceed as follows to use the preset counter output.

Totalizer Setting

•

Follows the procedure in 10.2 “Totalizer and Pulse Output” and set necessary items to the totalizer.

Preset Count Value, Preset

Output Function Setting

•

Follow the procedure in 8.2.16 “Preset Counter” and set the preset count value and output function.

DO/DI Setting

•

Follow the procedure in 8.2.14 “Digital I/O Function” and set the digital output

(DO) for use as a preset counter output.

In addition, if you want to reset the totalizer by an external signal, set the DI for the totalizer counter Reset/Start signal. (Set F3: DI FUNCTN to 2: C RES/STA.)

* Operation for the totalizer control signal can be set using the control signal level setting described in 8.2.14 “Digital I/O Function.”

When the operation switch in the converter is used to reset the counter, the digital input function (DI) setting is not needed.

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Preset counter output performance

•

Example to reset the totalizer using an external signal input

(When preset output level hold (Contact ON) is set)

H level input

Reset/Start signal

(DI control signal level H)

Totalizer flow count

L level input

Preset count set-point value

Counter reset

Preset output

Counter start

Counter reset

OFF

Input/Output Timing Chart

* When the Reset/Start signal is in H level (DI counter control signal level: H), the totalizer is reset to zero and stops counting. When the Reset/Start signal goes to L level, the totalizer starts counting.

The preset output goes ON when the totalizer count exceeds the preset value, and the output goes

OFF when the totalizer is reset to zero.

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6F8A0917

•

Example to reset the totalizer using an external signal input (When one-shot pulse output is set)

H level input

Reset/Start signal

(DI control signal level L)

L level input

Totalizer flow count

Counter reset

Counter start Counter reset

Preset count set-point

Preset output

OFF

Preset output is OFF because Counter is reset.

Preset output OFF because pulse width is reached.

Input/Output Timing Chart

* When the Reset/Start signal is in L level (DI counter control signal level: L), the totalizer is reset to zero and stops counting. When the Reset/Start signal goes to H level, the totalizer starts counting.

The preset output goes ON when the totalizer count exceeds the preset value, and the output goes

OFF when the pulse width is reached or the totalizer is reset to zero.

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•

Output example of one-shot pulse output

Preset count set-point value: 100

200

100

Totalizer count

Preset output OFF

Preset output OFF because pulse width is reached.

Input/Output Timing Chart

* Preset output goes ON when the count value exceeds the preset value of 100 and the preset output goes OFF when its width reaches the set pulse width.

When the preset value exceeds 100, the preset value is changed to 200 (adding the preset count of

100 to the current preset value of 100).

Then, the preset output goes ON when the count value exceeds the preset value of 200, and the preset output goes OFF when its width reaches the set pulse width.

When the preset value exceeds 200, the preset value is changed to 300 (adding the preset count of

100 to the current preset value of 200).

Note: When the one-shot pulse output function is selected, if its pulse width is large compared with the update interval of the preset value, the output stays ON. To make sure to output a one-shot pulse, set the preset value so that the conditions in the table below are satisfied.

Pulse width setting

50ms

500ms

Preset count value condition

Interval that the preset value reaches

100ms or more

1000ms or more

Example: Count rate: 0.01 l

Flow verosity: 10 l/s

Count-up rate:1ms/COUNT

Preset count value: 100 or more

Preset count value: 1000 or more

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10.7 Remote Still Water Zero Adjustment

Still water zero adjustment can be performed using an external signal.

To use this function, follow the procedure in 8.2.14, “Digital I/O Function” and set the DI as a zero adjustment start signal.

[Signal input condition]

H level signal

Zero adjustment signal L level signal

10 seconds Zero adjustment start

20 seconds

* The signal must be set to H level first and then it must go to L level 10 seconds later but not more than 20 seconds, and then zero adjustment starts at the falling edge of the signal.

If the signal stays in H level less than 10 seconds or more than 20 seconds, the signal will be ignored.

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10.8 Remote Selection of Fixed Value Output

4 to 20mA output and pulse output can be set to a fixed preset value using a remote signal input.

Proceed as follows to use this function.

Fixed Output Value Setting

•

Follow the procedure in 8.4 “Fixed Value Output (Loop Check)” and set the current output value and pulse output value to be used at the time of fixed output.

Set OFF for fixed output switching.

If the pulse output is not used, it is not necessary to set the pulse output value.

DI Setting

•

Follow the procedure in 8.2.14 “Digital I/O Function” to set the Digital Input (DI) to use it as fixed output mode control signal.

Signal input condition

External signal input

L level input

H level input

4 to 20mA and pulse output

Measured value is output.

Fixed preset value is output.

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10.9 Converter Error Alarm Output

If one or more of the following errors occur in a self-diagnosis sequence, an alarm signal will be output using contact signals.

List of Alarm Output Factors

Diagnosis error item

RAM error

ROM error

Exciting current value error

Exciting current wire broken

ADC error (error of flow measurement circuit)

Parameter error

Fluid empty alarm

Diagnosis error alarm output (DO)

WITHOUT EMP WITH EMP

−

○ : If an error is detected, DO diagnosis error alarm is output.

−

: Even if an error is detected, DO diagnosis error alarm will not be output.

(Alarm message is displayed)

Self-Diagnosis Function Setting

•

Follow the procedure in 8.2.19 “Self-Diagnosis Function” and set whether the self-diagnosis function is On or Off and set the alarm output factors.

For alarm output factors, set whether the fluid empty alarm should be included

(WITH EMP) or not included (WITHOUT EMP) for alarm output.

DO Setting

To use the converter error alarm output, follow the procedure in 8.2.14 “Digital

I/O Function” and set the Digital Output (DO) for converter error alarm output.

In addition, for alarm output state, select Normally Open or Normally Closed.

If the self-diagnosis function only is used and external contact output is not used,

DO setting is not needed.

•

Contact output operation

NORMAL OPEN

: If an error occurs, contact closes

NORMAL CLOSE : If an error occurs, contact opens

Note: When power supply is turned off, the contact is OFF (contact opens).

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11. Communications Function

The LF232 Series Converters are equipped with HART

protocol to transmit digital signals over the 4 to 20mA output line. The AF900 hand-held terminal (hereafter called HHT) can be used to check or change various parameters, calibrate the flowmeter or monitor the measured value from a remote place.

For the detailed operation and specification of HHT, refer to the "Hand-held Terminal for Sensor with

Communication Function AF900 Instruction Manual" (6F8A0849).

HART protocol: The “HART protocol”, which stands for Highway Addressable Remote

Transducer, is the name of the communication protocol for industry sensors that is recommended by HCF (HART Communication Foundation).

11.1 Connection with the HHT terminal

Connect the probe cable of the HHT terminal in parallel with the load resistor which is wired from the current output terminals (+ and

−

) of the flowmeter. Since the tip end of the probe cable is a pair of clips, use a junction terminal or a terminal block, etc. to connect with the clips of the probe. To connect the HHT directly to the flowmeter, use the terminals + and

−

of the converter main unit terminal block. Though the current output terminal has polarity, the HHT connection cable has no polarity.

See Figure 11.1 and 11.2 for connection examples.

4 to 20 mADC

(Communication line)

Load resistor

Terminal block or junction terminal

LF232 Converter

HHT

Figure 11.1 Connections to the Current Output Line

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Converter terminal block

HHT

Figure 11.2 Connection to the Converter Main Unit

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6F8A0917

11.2 Procedure for Communication with HHT

This section describes the HHT basic operations for communication between the flowmeter and HHT.

For details, refer to the HHT instruction manual.

* Carrying out the following preparatory operations to a commercially available PDA (OS: Windows

CE), the PDA can be used as a HHT.

Procedure Operation

Prepare a hand-held terminal (1) Install the AF900 application software to a commercially available PDA (OS: Windows CE) main unit. Then insert the serial interface card supplied with AF900 to the card slot of the PDA.

Prepare a hand-held terminal (2) Connect the HART interface cable and serial interface card supplied with AF900 to each other.

Connect the HHT Connect the alligator clips at the end of the HART interface cable to the current output line of the converter via a load resistor.

Start the HHT

Preliminary communication

Check or change the data

Turn on the power supply of the PDA to start the

AF900 application software.

Execute [sensor communication]. The model name of the connected sensor product is automatically identified and the converter menu screen appears.

Press the relevant parameter button and check or change the desired data.

Exit the communication When all of the operations are complete, press the

[Exist Application] in the top screen to turn off the power supply of the PDA.

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11.3 Cautionary Notes on Communications

Observe the following limitations when you communicate with flowmeter using HHT.

Current output load

(1) Load resistance: 240

to 1k

(including communications line resistance)

(2) Load capacitance: 0.25

F maximum (including communications line capacitance)

(3) Load inductance: 4mH maximum (including communications line inductance)

(For maximum cable length, about 2km is a guideline length when CVV-S

1.25mm

is used.)

Wiring cable

Use a shielded cable (CVV-S, etc) for wiring.

Interference on 4 to 20mA current signal

To communicate with the flowmeter, a digital signal (amplitude 0.4 to 0.8 V in the case of 500 Ω load resistance) with a frequency of 1.2 to 2.2 kHz is superimposed on the 4 to 20mA current signal.

If a receiving instrument with fast response time is connected to the analog current output line, the superimposed communications signal may interfere with the output. To prevent this interference, put a low-pass filter with a time constant of about 100 ms into the input circuit of the receiving instrument.

Current output line

Load resistor

Converter Filter

Receiving instrument

Figure 11.3 Filter Connection Example

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12. Diagnosis and Alarms

The LF232 converter is equipped with the function to diagnose such errors as setting errors, I/O errors or internal errors of the instrument and shows the error messages on the LCD display or on the HHT through communications. The diagnostic messages and their corrective actions are described below.

Setting error

If you try to set a constant or a unit exceeding the specified range in the setting mode, an error is displayed to prevent erroneous setting.

LCD display

* H.OVER SPEC.

* L.OVER SPEC.

* H.OVER C RATE

* L.OVER C RATE

* MULTI RNG ERR

Description

Setting value exceeds the settable range.

Setting value is below the settable range.

Count rate exceeds the settable range.

Count rate is below the settable range.

Span value setting does not satisfy the multi-range requirements.

Corrective action

Try to set a value within the settable range again.

Try to set a span value that satisfies the requirements.

High/low limit alarm

An alarm message appears if the flow rate indication goes out of the set range.

If the alarm is set to OFF, this function does not work. For how to set this function, see 8.2

“Parameter Check/Change.”

LCD display

HIGH ALARM

H-HIGH ALARM

L ALARM

L-LOW ALARM

Description

Flow rate is above the high limit set-point value.

Flow rate is above the high-high limit set-point value.

Flow rate is below the low limit set-point value.

Flow rate is below the low-low limit set-point value.

Corrective action

Adjust so that the flow rate stays below the set-point value.

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Process error alarm

LCD display

OVER 125%

UNDER – 125%

Description

The measured value is above the

125% of the span.

The measured value is below the

−

125% of the span

Corrective action

The setting range for measured value is narrow or the flow rate is unexpectedly large. Check whether the set value is correct or not and check that there is no problem in the process.

The setting range of measured value is narrow or the flow rate is unexpectedly large. Check whether the set value is correct or not and check that there is no problem in the process.

Fluid empty alarm

Detects that the fluid in the measuring pipe of the detector is empty and an alarm will be displayed.

If the alarm is set to OFF, this function does not work. For how to set this function, see 8.2

“Parameter Check/Change.”

(Note: In the case of LF232*F; Fluid empty alarm function is not usable. Set this function 'OFF'.)

LCD display

EMPTY

Description

Fluid is not filled in the measuring pipe of the detector.

Corrective action

Take measures to fill the pipe with fluid.

Precautionary notes when using the fluid empty alarm

(1) Since the fluid empty alarm is detected using the impedance between the signal wires connected to a pair of electrodes in the detector as well as the input signal level, a false alarm may be detected by the following factors:

•

Signal wire is broken or loose connection exists

•

A large amount of air bubbles are mixed in the fluid

•

Insulating materials are accumulated on the electrode

(2) In an environment where grounding is incomplete or excessive noise enters from the outside, the fluid empty alarm may not work correctly.

In addition, under the condition like this, reliability of flow measurement itself decreases. Take necessary measures to prevent the entry of noise such as making the ground complete

(independent Class D ground with grounding resistance 100

or less) or reviewing the cable wiring route.

(3) If the fluid still remains in the measuring pipe or deposits of conductive materials remain in the measuring pipe, the impedance between the signal wires does not increase and the fluid empty alarm may not work. In this case, use other method (such as a pump stop signal or a signal from valves) to check the fluid empty condition.

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Self-diagnosis error

The converter performs an operation check immediately after power is turned on and if an error is found, a self-diagnosis error is generated.

If more than one error occurs at the same time, the contents of those errors will be displayed cyclically. The diagnosis about excitation is carried out using the internal ADC function. Therefore, if an error of No.6 internal ADC occurs, Excitation wire of No.4 and Excitation circuit of No.5 cannot be diagnosed correctly.

In addition, since the entire checking system is based on the CPU, if the CPU fails, accurate diagnosis and indication cannot be obtained.

* ROM ERROR *

* RAM ERROR *

PARAMETER

FAIL

EX. CURR. OPEN

EX. CURR. ERROR

ADC. ERROR

INVALID TOTAL

Description

ROM error occurred

RAM error occurred

An error occurred in the internal parameters in the memory

Excitation wires are not connected.

An error occurred in the excitation circuit.

An error occurred in the ADC circuit

Totalized data in the memory was destroyed caused by the entry of noise.

(No message appears if the data is not displayed in an indicating unit of totalization.)

Internal parts or printed-circuit board must be repaired or replaced.

Contact your nearest Toshiba representative.

Connect the excitation wires correctly.

Internal parts or printed-circuit board must be repaired or replaced.

Contact your nearest Toshiba representative.

The error message disappears if you press the reset key to clear the totalized data.

Note 1: Diagnosis for No. 1, No.2 and No. 3 is performed only immediately after power is turned on. If any of these errors is indicated, the converter does not start measurement operation. If these errors occur after power is turned on, the converter cannot detect these errors. In addition, if this happen, the indication and output of the converter may become uncertain.

Note 2: Errors No. 4 to No. 6 may not be detected even if those errors cause accuracy problems because of the characteristic variations in components constituting the circuits used for judgment standard to determine these errors.

Note 3: CPU error cannot be detected. If the CPU stops, the watchdog timer resets the hardware and the flowmeter starts again from the initial power-on condition. Depending on the condition of CPU error, the indication and output of the converter may become uncertain.

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12.2 Output When an Error or Alarm Occurs

Error indication

ROM ERROR (Note

RAM ERROR

Measured value display

−

Current output

(4 to 20mA)

Totalizer pulse output

4mA (standard)

Stopped

Remarks

After power-up, measurement does not start.

PARAMETER FAIL

Zero 4mA (standard) Stopped

−

EX.CURR OPEN

EX.CURR ERROR

ADC ERROR

EMPTY

INVALID TOTAL

HIGH ALARM

H-HIGH ALARM

L ALARM

L-LOW ALARM

Zero

4mA (standard)

Stopped

Still water zero adjustment cannot be conducted.

−

Zero 4mA (standard) Stopped

−

Zero 4mA (standard) Stopped Still water zero adjustment cannot be performed.

Measured value Measured value Measured value The error message disappears if you clear (reset) the totalizer.

Measured value Measured value Measured value

−

Note 1: The display and output may be uncertain depending on the nature of the ROM error.

Note 2: If a parameter failure relating to the current output occurs, the current output may not become exactly the set value of the current output used when an alarm occurs.

Note 3: The output becomes the value selected in 8.2.11 “Current Output Setting Used When an Alarm

Occurs.”

Note 4: If the fluid empty alarm not included (WITHOUT EMP) is selected (standard) in the setting for alarm output factors in 8.2.19 “Self-Diagnosis Function,” the output becomes 4mA and if the fluid alarm included (WITH EMP) is selected, the output becomes the same as the above in Note 3.

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6F8A0917

13. Maintenance and Inspection

Do not conduct wiring work when

power is applied

DON’T

Wiring while power is applied can cause

electric shock

Do not touch the LF232 main body when

high temperature fluid

is being measured.

The fluid raises the main body temperature and can cause

burns

when touched.

DON’T

Mag-Prover Calibration / Check

The LF232 converter has a built-in reference signal calibration and verification circuit that allows you to re-verify the original flowmeter flow lab calibration without the need for external devices.

This reference signal can be used to check and adjust the circuit to perform zero and span calibration of the converter itself and for the purpose of maintenance and periodical inspection. See

9. “Mag-Prover Calibration.”

Check / Replacement of fuse

Fuse can be taken out by turning the top of the fuse holder counterclockwise. Check that the fuse is not damaged. In addition, fuse has its own life and it must to be replaced periodically.

(Recommended replacement cycle is about 3 years.)

Type of fuse used: Glass tube fuse (normal blow type)

Rating: In the case of power supply 100 to 240 VAC and 110VDC

1A, 250V 2 pieces

In the case of power supply 24VDC and 100 to 120 VAC for large meter size detector

2A, 250V 2 pieces

In the case of power supply 24VDC for large meter size detector and 24VDC for partially filled pipes detector

3A, 250V 2 pieces

Dimensions: Diameter 5.2 mm × 20 mm

Check / Replacement of display unit

If the characters displayed on the LCD become thin or blots come out, the life of the LCD is reached. Replace the display unit with a new one. In order to use the display unit stably for a long time, it is preferable to replace it early. For inspection and replacement, please contact your nearest

Toshiba representative.

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6F8A0917

Check / Replacement of power supply unit

In general, electronic components deteriorate faster if the ambient temperature is high. The life of the power supply unit is about 10 years if the ambient temperature is 40°C, and 5 to 6 years if the temperature is 50°C or more. To extend the life of the flowmeter, it is recommended that you replace the power supply unit early.

Contact your nearest Toshiba representative for a flowmeter inspection or unit replacement.

Product disposal

The main body or parts of the converter must be disposed of, according to the rules and regulations of your local government.

Especially if you dispose of electrolytic capacitors to replace parts, have it done by an agency which is licensed to handle industry waste materials.

Operative life

The operative life of this flowmeter is 10 years from the date of shipment.

The life of the flowmeter differs depending on the environmental conditions and the way it was used. To extend the life of the flowmeter, inspect the flowmeter periodically and clean or replace components if necessary.

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6F8A0917

If a problem occurs, you may find a cause of the problem by performing the simple inspection.

Before you call repair service personnel, inspect the flowmeter using the flowcharts shown below.

13.2.1 Flow rate is not indicated

START

Is the rated power supplied for each device?

YES

Are cables installed correctly?

YES

Isn't the fuse blown?

Is the velocity range set correctly?

YES

Does the flow direction agree with the arrow mark on the detector?

YES

Contact your nearest Toshiba representative.

YES

Use the rated power supply for each device.

Install the cables correctly according to

5. “Wiring.”

Replace the fuse with a new one.

Set the velocity range correctly according to 8. “Parameter Settings.”

Install the detector correctly according to

4. “Installation.” In addition, set the direction of flow correctly according to 8.

“Parameter Settings.”

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6F8A0917

13.2.2 Flow rate indication is not correct

START

Is the velocity range correctly set?

YES

Is zero point correctly set?

YES

Is the exciting current correct?

YES

Isn't the inside wall of detector pipe or electrode contaminated?

YES

Is the output load resistance 1k or less?

YES

Aren't there two load resistors connected to the output in parallel?

YES

Is accuracy calculated as follows?

(Measured flow rate) (Actual flow rate)

Actual flow rate

100 (%)

YES

Contact your nearest Toshiba representative.

Set it correctly according to 8.

“Parameter Settings/Adjustment.”

Perform zero adjustment according to 6.

“Operation” and 8.5 “Zero Adjustment.”

Set the exciting current correctly according to 8. “Parameter Settings.”

Clean the inside wall of the detector pipe to remove the deposits.

Design the output circuit so that the output load resistance is less than 1 k .

Connect the two load resistors in series, if necessary.

Calculate as shown on the left.

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6F8A0917

13.2.3 Flow rate indication is not stable

START

Is power supply voltage within the specified range?

YES

Aren't the cables slackened?

YES

Are converter and detector grounded with Class D ground

(100 or less ground resistance)?

YES

Is the detector pipe filled with fluid?

YES

Isn't the fluid in the detector pipe carrying bubbles?

Isn't there large-current or highvoltage cable or equipment near the flowmeter?

Contact your nearest Toshiba representative.

YES

Use a power supply within the specified range.

Connect each cable securely to the terminal block.

Ground the converter/detector with

Class D ground (100 or less ground resistance) using IV wire of 5.5 mm² minimum.

Design piping so that the detector pipe is filled with fluid all the time.

Design piping so that the fluid does not carry bubbles.

Install the flowmeter away from the equipment producing electromagnetic or electrostatic interference.

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6F8A0917

13.2.4 When switch operation is unable

START

Does intense light shine on the control panel such as direct sunlight or reflected sunlight by window glass or metal sheet?

YES

Does the brightness change always by

ON/OFF of lighting?

YES

Are you working with unfixed lighting such as a flashlight?

YES

Does the control panel get rained?

Is the control panel attached with dewdrop, snow, ice, mud or oil?

Is the control panel hazed by steam?

YES

Are you wearing dark color gloves?

Or are your finger or gloves stained?

Is there any light reflecting object near the control panel?

YES

Is there any reflecting object such as metal plate placed opposing to the control panel?

YES

Contact your nearest Toshiba representative.

YES

Place a cover to block the light from surroundings, or cover the control panel by hand to block the light.

Operate the EMF converter fixing a light to shine on the control panel as constantly as possible.

Place a cover on the control panel to protect from rain, and operate the EMF converter.

Clean the attached or haze and operate the EMF converter.

Further, place a cover to prevent from attaching.

Clean the stain on fingers or gloves, or wear gloves in light color and operate the

EMF converter.

Secure a space in front of the control panel to allow a person to stand

Operate the EMF converter blocking the light from the reflecting object by standing in-between the control panel and the reflecting object.

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6F8A0917

14. Principle of Operation

The operating principle of the electromagnetic flowmeter is based on Faraday's Law of electromagnetic induction. The principle of operation is that an insulated pipe with inner diameter D is placed vertically to the direction of a magnetic field with flux density B (see Figure 14.1). When an electrically conductive fluid flows in the pipe, an electromotive force signal E is induced between a pair of electrodes placed at right angles to the direction of magnetic field. The electromotive force signal E is directly proportional to the average fluid velocity V and this voltage signal is detected.

The following expression is applicable to the voltage.

E = K × B × D × V [V] ····································· (Eq. 14.1) E: Electromotive force signal [V]

K: Constant

B: Magnetic flux density [T]

D: Meter pipe inner diameter [m]

V: Fluid velocity [m/s]

Volumetric flow rate Q [m

/s] of fluid is:

Q =

π × D

× V ··········································(Eq. 14.2)

Thus, we can obtain the equation below using Eq.14.1 and Eq.14.2,

E = K × B × D

π × D

× Q

E =

4 × K × B

π × D

× Q·····································(Eq. 14.3)

Therefore, the electromotive force signal E proportional to the flow rate can be obtained.

Square-Wave Excitation Method

Figure 14.1 Principle of Operation

The LF232 electromagnetic flowmeter converter uses the square-wave excitation method, which provides long-term stable operations without being affected by electrostatic and electromagnetic interferences.

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6F8A0917

15. Specifications

Detector Combined Specifications

1. Measuring range: (measuring range in terms of flow velocity)

0 –1.0 ft/s to 0 – 32.8 ft/s (0 – 0.3 m/s to 0 –10 m/s)

For partially filled pipes detectors (Combined detector is LF502)

6” (150mm)

8” (200mm )

10” (250mm )

12” (300mm )

14” (350mm )

16” (400mm )

20” (500mm )

24” (600mm )

0 – 264 GPM(std) to 0 – 1320 GPM

(0 – 60 m

/h to 0 – 300 m

/h )

0 – 484 GPM(std) to 0 – 2420 GPM

(0 – 110 m

/h to 0 – 550 m

/h )

0 – 770 GPM(std) to 0 – 3850 GPM

(0 – 175 m

/h to 0 – 875 m

/h )

0 – 1100 GPM(std) to 0 – 5500 GPM

(0 – 250 m

/h to 0 – 1250 m

/h )

0 – 1540 GPM(std) to 0 – 7700 GPM

(0 – 350 m

/h to 0 – 1750 m

/h )

0 – 1980 GPM(std) to 0 – 9900 GPM

(0 – 450 m

/h to 0 – 2250 m

/h )

0 – 3124 GPM(std) to 0 – 15620 GPM

(0 – 710 m

/h to 0 – 3550 m

/h )

0 – 4400 GPM(std) to 0 – 22000 GPM

(0 – 1000 m

/h to 0 – 5000 m

/h )

(

Above flow rate is almost 0 – 3.28 ft/s (std) to 0 – 16.4 ft/s (0 – 1 m/s to 0 – 5 m/s ) flow velocity.

)

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6F8A0917

2. Measurement accuracy: (Accuracy when combined with detector)

•

Combined detector: LF470 (Meter size 1/10” to 1/4” (2.5 to 6mm))

Range

Flow rate to the range (%)

0 to 50 %

50 to 100 %

1.0-3.3ft/s

(0.3-1.0m/s )

± 0.8 % FS

3.3-32.8ft/s

(1.0-10m/s )

± 0.4 % FS

± 0.8 % of rate

•

Combined detector: LF150 (Meter size 20” to 120” (500 to 3000mm))

±0.5 % of Rate

* This error is pulse output results calibrated under standard operating conditions at Toshiba’s flow calibration facility.

* Individual meter’s measurement error mayvary up to ± 0.8 % of Rate at 3.28 ft/s (1.0 m/s) or more and ± 0.4% of Rate ±0.157 inch/s (4mm/s) at 3.28 ft/s or less.

* Refer to individual calibration data for each meter’s measurement error.

•

For partially filled pipes detectors (Combined detector is LF502)

± 2 % FS

Note: Accuracy is measured when detector and converter are newly combined under the basic operating conditions in the Toshiba calibration facility.

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6F8A0917

3. Other specifications

•

Conductivity:

•

Power supply:

5 μ S/cm or more

(If detector is partially filled pipes type, conductivity is 100 μ S/cm or more)

100 to 240VAC (allowable voltage range: 80 to 264VAC, 50/60Hz)

24VDC (allowable voltage range: 21 to 27VDC)

•

Power consumption: 17W (27VA ) or less (when 7th digit of specification code is “A”)

35W (60VA ) or less (when 7th digit of specification code is “B”)

30W (50VA ) or less (when 7th digit of specification code is “F”)

When the 7th digit of specification code is “B” and “F”, power supply is 100 to 120VAC

(allowable voltage range is 80 to 132VAC, 50/60Hz)

When the 7th digit of specification code is “B” and “F”, 24VDC cannot be selected.

•

For partially filled pipes detectors:

Fluid water level range:

Meter size 6”-12” (150-300mm) : Water level 1 1/4(30mm) to state to be filled with water

Meter size 14”-24” (350-600mm) : 10% of meter size to state to be filled with water

Note) State to be filled with water is water level 100%

Necessary straight pipe length:

Upstream side : 10D or more

Downstream side: 5D or more

Note) D is meter size.

Converter specifications

1. Input signal: Flow rate proportional signal from the detector

2. Output signal: 4 to 20mADC (current signal, load resistance 0 to 1k

)

3 Digital Input/Output

•

Digital Output

Digital Output 1: Output type Transistor open collector

Number of outputs 1

Digital Output 2 (option: added when 9th digit of specification code is “3”) :

Output type Solid-state contact output

Number of outputs 3

150VAC (peak value), 100mA max.

* For digital output function, either of the following functions can be selected.

Digital Output function

•

Totalizer pulse output DO1 or DO2 can be selected

(Forward direction pulse and reverse direction pulse can be assigned independently)

In the case of DO1 Pulse rate 3.6 to 3,600,000 pulses/h

Pulse width Settable within the range of 0.3 to 500ms

In the case of DO2 Pulse rate 3.6 to 360,000 pulses/h

Pulse width Settable within the range of 4 to 500ms

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6F8A0917

•

Range switching output One Digital Output (DO) is used

•

Single direction, 2-range switching signal

•

Forward/reverse direction switching signal

Two Digital Outputs (DO) are used

•

Single direction, 4-range switching signals

•

Forward/reverse 2-range switching signals

•

High/low limit alarm output

An alarm is output when flow rate goes above or below the set-point value

Setting range

−

10 to 110% of the settable maximum range

High limit 2 points, low limit 2 points can be set

At the time of alarm output, Normally Open or Normally Closed contact can be selected

•

Preset counter output

Contact ON when totalizer count exceeds the set value

Setting range 1 to 99999999 count

•

Converter error alarm

An alarm is output when an operation error is detected by self-diagnosis.

At the time of alarm output, Normally Open or Normally Closed contact can be selected

•

Digital Input (option: added when 9th digit of specification code is “3”): 2 Digital Inputs

Signal type: Voltage signal of 20 to 30 VDC (H level: 20 to 30 VDC, L level: 2 VDC : less)

Input resistance: About 2.7 k

* For digital input function, either of the following functions can be selected.

Digital Input function

•

Range switching input One Digital Input is used: switching between large and small ranges of forward/reverse, 2-range measurement

Two Digital Inputs are used: switching between ranges of single direction, 4-range measurement

•

Totalizer control input Totalizer Start/Stop control or Reset/Start

•

Output hold input Fixed with set value for current output and pulse output (loop check)

•

Zero adjustment input Performs still water zero adjustment

4. Communication function

•

Communication signal: Digital signal is superimposed on 4 to 20mA signal line (conforms to

HART

protocol)

•

Load resistance 240

to 1k

•

Load capacitance 0.25

F or less

•

Load inductance 4mH or less

(For maximum cable length, about 2km is a guideline length when CVV-S 1.25mm

is used under standard installation condition.)

*1 HART: “HART” stands for Highway Addressable Remote Transducer and is the name of the communication protocol for industry sensors that is recommended by HCF (HART

Communication Foundation).

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6F8A0917

5. Display/setting items

•

Output display: 16-character

2-line dot-matrix LCD (with back light)

Indicating unit: 2 units can be selected from the flowing units: flow velocity, instantaneous flow rate, total flow (forward/reverse/difference flow), total count, %, custom unit.

•

Setting: Various parameters can be set without opening the converter housing using 4 infrared switches (password can be set)

Settable also with AF900 Handheld terminal

•

Damping: 0.5 to 60 seconds (settable in increments of 1 second)

•

Zero adjustment: Adjustable with infrared switches

•

“Field re-verification”

Mag-Prover

– Toshiba’s Zero span calibration tool :

Allows unit to be re-calibrated and verified using internal software program

(for more information contact Toshiba International Corp.)

•

Operation at power failure: Various setting values are stored in non-volatile memory.

Current output 0mA

Digital Output OFF (contact open)

Display Unlit

6. Other items

•

Mass: Approx. 18 lb (8kg) (including a mounting fitting)

•

Ambient temperature: -4 to 140

°F

(-20 to 60 °C)

(storage temperature: -13 to 149

°F

(-25 to 65 °C))

•

Arrester: Included in the power supply circuit, current signal output circuit and digital I/O circuit.

•

Terminal block structure: 21-pole, screw connection type (M4 screw)

•

Housing material: Aluminum alloy

•

Painting: Acryl resin baked painting with pearl gray color

•

Structure: IP 67

•

Cable ports: G (PF) 1/2 female thread with cable connection

Adaptable cable diameter: φ 0.433 to 0.512 inch ( φ 11 to 13mm)

Material: Nylon 66

•

Vibration resistance: No resonance point exists when the following vibration is applied:

10 to 55Hz with amplitude of 0.07mm,

No problem occurs when vibration of 30Hz, 29.4m/s

2 direction for 4 hours each.

is applied in each

Note: If the flowmeter is intended to be used in a location where vibration is applied constantly, contact Toshiba.

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6F8A0917

15.2 Model Number Table

LF232*A, LF232*B Converter model number table

Model number Specification code

1 2 3 4 5 6 7 8 9 10 11 12

Description

Purpose

A Standard

(Note (Note

A Medium to small size (Meter size: 1/10” to 18”(2.5 to 450mm))

Mounting nuts and bolts

E Pipe

1 Current output

+ Digital outputs points (1 point)

3 Current output

+ Digital outputs points (4 point) + Digital nputs points (2 point)

Power supply

1 100 50/60Hz

A Standard

•

Note 1: For applicable detector code, select one from the following table.

To combine with an existing detector, select one depending on the type of replaceable converters.

For combination with detectors not listed below, contact Toshiba.

Applicable detector code

Applicable detector

(discontinued model)

334,

Replaceable converters

372, LF200, LF220,

LF420, LF230* A type types shown right)

337, 373, 378, LF230* B type types shown right)

•

Note 2: When the 7th digit is “B” and power supply specification code is “1”, power supply specification is 100 to 120VAC.

•

Note 3: 24VDC can be specified only when the 7th digit is “A”.

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6F8A0917

LF232*F (for partially filled pipes detectors) Converter model number table

Model number Specification code

1 2 3 4 5 6 7 8 9 10 11 12

Description

L Separate

Purpose

Standard

Compatible detector

F For pipes

(Meter size : 6” to 24” (150mm to 600mm) )

Mounting nuts and bolts

Digital

1 Current output

+ Digital outputs points (1 point)

3 Current output

+ Digital outputs points (4 point) + Digital nputs points (2 point)

Communication function

1 HART communication

Power supply

1 100

A Standard

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6F8A0917

16. Outline Drawing

Electromagnetic Flowmeter Converter LF232 Type

9.33 (237)

8.74(222)

2.94(74)

Gross mass: approx. 18 lb(8kg)

(including a mounting plate)

0.47(

12) hole (4 places)

6.10(155)

Signal cable connection

Power cable connection

Output cable connection

Ground terminal

Excitation cable connection

2.99 (76)

2.99(76) 2.99(76)

Digital I/O cable connection

Unit : inch (mm)

Figure 16.1 Outline of Electromagnetic Flowmeter Converter 232 Type

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6F8A0917

Write down the address and phone number of the distributor from which you purchased this product, the product code, SER.NO. and so on.

Distributor Address

Name

Phone number ( )

−

Product code LF

SER. NO.

- 172 -

Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

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INSTRUCTION MANUAL

6F8A0917

NOTICE

SAFETY PRECAUTIONS

Explanation of signal words

Safety symbols

Color explanation

SAFETY PRECAUTIONS

(continued)

Safety Precautions for Installation and Wiring

SAFETY PRECAUTIONS

(continued)

Safety Precautions for Maintenance and Inspection

Usage limitation

Warranty and Limitation of Liability

Handling Precautions

Handling Precautions

(continued)

Table of Contents

1. Product Inspection and Storage

2. Overview

3. Names of Parts

4. Installation

5. Wiring

6. Operation

7. Display and Controls

8. Parameter Settings / Adjustment

9. Mag-Prover

10. Function

11. Communications

and

13. Maintenance and Inspection

14. Principle of Operation

15. Specifications

16. Outline

1. Product Inspection and Storage

1.1 Product Inspection

1.2 Storage

2. Overview

Features

3. Names of Parts

Appearance

Internal structure (with converter cover opened)

Terminal block construction

4. Installation

Cautionary notes on installation

4.1 Cautionary Notes on Selecting the Installation

Location

4.2 How to Install the Converter

5. Wiring

Cautionary notes on wiring

5.1 Installation Cables

5.2 External Connections

5.3 Cautionary Notes on Wiring

5.3.1 Cautionary Notes on Wiring between Detector and Converter

5.3.2 Cautionary Notes on Wiring between Instruments and Converter

5.4 Wiring Method

5.4.1 Terminal Treatment of Cables

Excitation cable

Connecting the input signal cable

Cautionary notes on terminal treatment for shields of the signal cable

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

5.4.3 Grounding

5.5 Digital I/O Connections

5.6 Cautionary Notes on Replacing Converter

5.6.1 Replacing the LF230 Converter

Installation

Wiring

5.6.2 Combination with an Existing Detector

5.6.3 Replacement of partially filled pipes type

6. Operation

7. Display and Controls

Observe the following precautions when you open the converter cover:

7.1 Names and Functions of Display and Controls

LCD display

Operation switch

Instructions