Toshiba LF434 User Manual

TOSHIBA	6 F 8 A 0 7 . 7 0

ELECTROMAGNETIC FLOWMETER

MODEL LF434/LF404

INSTRUCTION MANUAL

-TOSHIBA COHRORATION

TOSHIBA	6 F 8 . A 0 7 7 0

NOTICE

Tills M^iuiol is desigiisci to assist in installing, operating, and inainLaining the LF434/lT4()4dt:clromagneric flowmeterFor safety reasons, and to obtain the opti­ mum pcrtormancc from Ihe flowmeter, read this Manual thoroughly before w'orking with the product. Keep the Manual within easy reach for reference whenever needed.

The flowmeter to which this Manual refers is NOT designed for applications in which the functioning of this product is critical to human safety, such as:

♦Main control systems of nuclear power plants; safety systems in nuclear facilities

or other critical control lines directly affecting human safely.

•Control systems of medical equipment, including life support machines.

NOTES

1.The reproduction of Ihe contents of this Manual in any form» w'hether 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.Re sure to follow all ,safeiy, operating and handling precautions described in this Manual and the regulations in force in the country in which this product is to be used,

HART is a registered trademark of the llAR'l’ C’omniumcatioii Foundation. Teflon is a registered trademark of the DuPont Company.

I’hird Edition

October. 2im

© Copyright 1999» 2000 by Toshiba Corporation, All rights rc,scrved.

TOSHIBA	6 F 8 A 0 7 7 0

SAFETY PRECAUTIONS

Siifeiy signs and InhcJs affixed to Ihc product iUid/ur dcscribetl in Ihis manual give imporLaiU

inibrmation for using the produci saldy. I’hcy help prevent damage lo property and obviate

hazards for persons using the product.

Make yourself familiar with signal words and symbols used for safety signs and lab els/Then

read the safely precautions that follow to prevent an accident involving personal injuiy>

death or damage to [>ropcrty,

IvxplaDation of signal words

'flic signal word or words are used to designate a degree or level of hazard seriousness,

I’he sigrial words used for the product described in this manual arc WARNING and

CAUTION,

Indicates a potentially ha/ardous situation A WARNING which, if not avoided, could result in death or

‘icrious injury,

Indicates n potentially iiazardous silualion A CAUTION which, if not avoided, may result in minor to

moderate injuries or in properly damage.

Safety symbols

The following symbols arc used in safely signs and labels affixed to a product and/or in the

manual for giving safely inslniciioiiM.

0	Indicates an action that is prohibilud. Simply [DON’T do this action,
	Thethe circkprohibited action is indicated by a picture or text inside or next to
•	Indicates an action that is mandatory, DO this action.
	The mandatory action is indicated by a picture or text inside or next lo
	the circle.
A	Indicarcs a poieniial hazard, The potentially hazardous situation is
	indicated by a picture or text inside or next to (he triangle.

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TOSHIBA	6 F 8 A 0 7 7 0 ,

SAFETY PRECAUTIONS

Safety Precautions for Installation and Wiring

Zh WARNING

Do not disconnect while circuit \s iive onlcss locution is known to be nonhazardous.

0 Live part of electric circuit OT a high temperature department can cause

explosion.

DONT

I Do not modify or disassemble the enclosure.

Strength degradEilion and defects of enclosure can cause explosion,

DONT

Do not use parts of other products.

0 Protectiveexplosion. pcrformiincc degradation for hazardous location can cause

DONT

Do not live circuits While assembly of all components is not over.

0 explosion.Protective performance degradation for hazardous location can cause

DONT

Install per the National Electrical Code for the UгS (NEC, ANSI/NFPA 70) and the Canadian Electrical code for Canada (CEC, CAN/C5A-C22.1).

	O	Unsuitable conduit connections for hazardous location can cause ex­
		plosion.
	DO
		A CAUTION
	■ Turn off maius power before working		■ Use an appropriate device to carry
	on pipes«		and install the LF434/LF404.
		A Working on pipes vvhiJc		If this product falls to the
				ground^ injury, or malfunction
		power is applied can cause
				of or damage to the product,
	QQ electric shock.
				can be caused.
	■ Install a switch and fuse to isolate the		■ Do not modify or disassemble the
	LF434/LF404 from mains power.		LF434/LF404 unnecessarily.
	A A Power supply from mains			Modifying or disassembling
			( jy [his product can cause electric
		power can cause electric
				shock, malfunction of or
	DO t>reakdow n.
			nOisf’T	’ damage to this product. |

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TOSHIBA	6 F 8 A 0 7 7 0 :

SAFETY PRECAUTIONS (contiaued)

Safety Precautions for Maintenance and Inspection

âs CAUTION

■ Turn off mains power before		■ Ground (he LF434/LF404 indepen­
conducting wiring work.		dently from power equipment.
Wiring while power is ap-		Operating this product without
		grounding can cause electric
plied can cause electric shock,		PQ shock or malfunction.
DO
■ Do not conduct wiring work with bare		■ Use compression terminal lugs with
hands.		insulation sleeve for the terminal
Rcma i n i n g cJ cetr ic charge		block and GND terminal.
		1.0QSC connections can cause
( even if pov-'cr is turned off		electric shock, fire from
^ can still cause electric shock.		excessive current or system
DONT		malfunction.
■ Do not work on piping and wiring with		The label shown left is placed
wet hands.		near the terminal board for
Wet hands may result in		power input.
f electric shock,		/ i \ (A black border and symbol on
DON'T		yellow triangle)
		Be alert to electric shock.
■ Do not touch the flowmeter main		■ Do not conduct wiring work when
body when high temperature fluid is		power is applied.
being measured.
The fluid raises the main		Wiring while power is applied
i body temperature and can		I can cause electric shock,
^ cause bums when touched.		DONT
DON’T
■ Do not conduct wiring work with wet		1 be label shown left is placed
hands.		* near the terminal board for
1^0 Wet hands may result in		power inp ut.
		\ (A black border and symbol on
elccrric shock.		yellow triangle)
DONT		Be alert to electric shock.
■ Do not use a fuse other than the one		Use a rated fuse as follows:
specified.		Fuse rating:
Using a fuse other than the		^ lA/^.'inV for lilt) to 240Vac or 1 liiVdc
j one specified can cause		* 2A/2.^0V for 24 Vdc
j/ system failure, damage or		Dimensions:
malfunction,		Diameter 5.2 mm x 20 mm
DONT		Melting time characteristic:
		Normal blow j

Disclaimer

Toshiba does not accept liability for jny damage or loss, material or personal, caused as a direct or indirect result of the operation of this product jii connection with, or duo to, llie occurrence of any event of force majenre (including fire or earthquake) or the misuse of this product, whether inicnclonal or accidentaL

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TOSHIBA	. 6 . F 8 A 0 7 7 0

Handling Precautions

■Jo obtain the oplimum performance from the LF434/LF404 flowmeter for years of coniinLous operation, observe the following precautions.

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

•places w here there is direct sunlight. If this is unavoidable, use ait appropriate sunshade.

•places where excessive vibration or mechanical shock occurs,

•places where high temperature or high humidity conditions obtain.

•places where corrosive atmospheres obtain.

•places submerged under water,

To put the flowmeter temporarily on the floor, place it carefully wnth something to support it so that the flowmeter will not topple over.

(2) Execute wiring securely and correctly.

Ground the flowmeter with 100 ohm or less ground resistance. Avoid a common ground used with other equipment where earth current may How. An independent ground is preferable

(3)Seal the cable thoroughly at the cable gland so that the cable is kept airtiglit. 1 he apparatus should not be provided with the cable gland. Please prepare yourself for the cable glands w'hicb could be used in Division 2 hazardous locations.

(4)Make sure the fluid to be measured will not freeze in the detector pipe. This can cause damage to the detector pipe.

(5)Select apprupriate welted materials suited for the process fluid to he measured. Otherwise, fluid leakage due to corrosion can be caused.

(6)The converter housing covers are tightened securely at the time of shipment. Do not remove these awers or glands unless it is necessary to wire new cables or re­ place old ones. Otherwise, gradual deterioration of circuit isolation or damage to this product can be caused. Tighten the covers securely again if they have been re- [iioved.

L

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TOSHIBA	, 6 F 8 A 0 7 7 0

Handling Precautions (continued)

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

•Do not open the cover in .he open air unprotected ngninst rain or wind, J his cun cause electric shock or cause damage to the ilowmetcr elccironics.

*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 dec ironies,

(B)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 thi.s interference.

(9) Radio Iransmiilers such as tran.sceivers or cellular phones may cause interference

to the ñowmcter if they are used near the installation site. Observe the following

precautions when using them:

•Do not use a radio transmitter while the cover of flowmeter converter is open.

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

•Move the antenna of a ratio transmitter at least 50 cm away from the flowmeter and signal cables when using it.

•Do not use a radio traiismitler near the ñowmeler while it is operating online. The transmitter's output impulse noise may interfere with the flowmeter.

•Do not install a radio transmitter antenna near the flow'meier converter and signal cables.

(10)For reasons of flowmeter failure, inappropriate parameters, unsuitable cable con­ nections or pCHjr 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 iitstallcd on the flowmeter signal re­ ceiving side.

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TOSHIBA

Table of Contents

SAFETY PRECAETfONS

Handimg Precautions ........................................................

1, Product Inspection and Storage ...............................

1.1Product Inspection

1.2Storage ........................................................................................................................

2, Overvie>v ....................................................................

3, Names of Parts ...........................................................

4, Installation ..................................................................

4.1Location ...................................................................

4.2Mounting Procedure.................................................

4.3Piping Connections .................................................

5, Wiring .........................................................................

5A Cables .....................................................................

5.2External Device Conncc.ions and Grounding

5.3Digital I/O Connections ......................

5.4 Wiring Procedure .........................	‘ '
6 , Operation ................................................

6.1Preparatory Check

6.2Zero Adjustment ...............................................................

7, LCD Display and Controls ...................

7.1Outline ................................................

7.2Display Formal ...................................................

7.3Basic Operations .................................................

7.4Configuralion Items Selection Table ' ■

7.5Password Input ...................................................

8» Configuration Parameter Setting ..........................

8.1Configuration Items ............................................

8.2Checking or Changing Parameters .....................

9.Calibration .............................................................

9.1Calibration Items ................................................

9.2Calibration Using Converter Signal Source

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■ 2

-■5

9

g ■ 9

10

11

14

15 ' 16

' 20

‘ 25 ■27 ■ 27 29 ’ 30 ■ 32 ' 32 33 ‘ 34 34 ■36 ■ 38 ‘ 44 ■45 ^ 46 ■46 ■ 46 103 103 104

-

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10, Digital I/O Functions ...................

10.1 Digilai I'O Spccjficaiians '

L0,2 Totalizer and Pulse Output

10.3Multi-range Functions ■ ■ ’

10.4High and Lou Limit Alarms

10.5Empty Pipe Alarm

10.6Preset Point Output

10.7Remote Zero Adjustment ................................

10.8Remote Selection of Fixed Value Output

10.9Converter Failure Alarms ................................

tl. Communications Function

11.1Communications with the AFIOO Terminal

11.2Communications Procedure .................................

1 L3 Cautionary Notes on Communications ‘ '

12, Self-Diagnostics and Alarms ...................................

12J Self-Diagnostics .............. ......................................

12.2 Output Status for Errors and Alarms ...................

13, Maintenance and Troubleshooting ................................

13.1 Maintenance ...................... ..................................

13.2 Troubleshooting ...................

14, Principle of Operation ....................

15, Specifications ..............................

15.1Flowmeter Specifications

15.2Type Specification Code

16, Outline Dimensions . .................

Appendi\ 1. Electromagnetic Compatibility and Low Voltage Safety ’

Electromagnetic Compatibility

Low Voltage Safety ^ ^ ■ ■ ■ ■ ►

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1, Product Inspection and Storage

i;pon arrival of The product piickfige» open [lie package and check the items contained inside, If you do not intend to install the product soon after opening llie package, store the product and other related items in a place such as described in 1.2 below,

IJ Product Inspection

The LE^34/LF404 electromagnetic flowmeter is shipped in a cardboard cnniaincr filled with shock-ahsorbing materials. Open the package carefully and check as follows:

■Make sure the following items are included in the package.

(1)Model LF434/LF404 Electromagnetic Flowmeter,.,.,, i

(2)Instruction Miitiual .............................................................. j

■Inspect the flowmeter for indications of damage that may have occurred during shipment.

■Make sure the type and spedficalions of the flowiiieter arc in accordance with the ordered specifications,

If you cannot find the items listed above or any problem e?(ists, contact your nearest

I’oshiba representative,

1,2 Storage

To store the LF434/LF404 flowmeter after opening the package, select a

storing place as follows and keep it under the conditions described below;

(1)Avoid places where there is direct sunlight, rain or wind.

(2)Store the product in a wcll-veniilated place. Avoid places of extremely high humidity or extremely high or low temperature. The following cnvlroiitucnt is recommended;

« Humidity range: 10 to 9i)% RH [no candensation)

• Storage temperature: -15 to +65* C

(2)Avoid places where vihralions or mechanical shock occur.

(4)Do not leave the converter housing cover open . Open the cover only w-hen you actually start wiring cables. Leaving the cover open catt cause gradual dctcrioraiion of circuit isolation,

(3) To pm the flowmeter temporarily on the floor, place it carefully with something to support it so that the flowmeter will not topple over

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TOSHIBA	6 F 8 A 0 7 7 0

2. Overview

The LF434/1P4U4 elecLromagnetic flowmeter can be use in the following hai:afdoLis (clas­ sified) loc;iLions.

(1) FM Approval

Gass I j Division 2, Groups A, C, C and D, Class II, Division 2, Groups P and G Class in

(2) eSA Ccrtifieation

Class I , Division 2, Groups A. B, C and D,

Class n , Division 2, Groups R, i- and G

GassU

rhe device measures the volumetric flow rates of electrically conductive materials on the basis of Faraday's Law of electromagnetic induction.

The device consists of two units: Ue detector, through which the fluid to be measured flows, and Ihe converter, which receives the elcciromotivc force signals from tiie detector, then converts the signals into the 4—20 mAdc signal.

Features

Model 1F434/LF404 flowmeter has the following features:

(1)Fluid flow is not obstructed and pressure loss is negligible.

(2)Toshiba’s original noise-suppression circuit with signal processing Ccipcibililics ensures a stable outpul.

(3)lias no moving parts and How indication is quick with high accuracy even under low flowrate measurement conditions,

(4)No obstacles in the flow stream ami nowhere remains the fluid along the detector pipe. Thus deterioration or corrosion of fluid does not occur,

(5)High accuracy, ±0.5% of rale is possible for 0,3-10 rrv’s velocity range. (). I to 0.3 m/s range is available optionally.

(6)'I'he flowmeter has various How measurement outpul and control functions as standard specifications and the optional IXD display for convenient parameter settings.

' These funciions can he selected with control keys on the panel.

(8)Intelligent functions

* The widely used HART [protocol communications system is used as a standard feature. HART (Highway Addressable Remote Transducer) is a commtmications protocol for industrial sensors recommended bvHCF (HART Communication Foundalion).

(9)An casy-to-rcad LCD display (2-iine x 16-character display) (optional)

* The backlit LCD display can be read even under poor lighting conditions.

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3. Names of Parts

Tht: oulliEie drawing of ihe LF434/LF404 ilowm&ter is shown in Figure 3,1 and the in-

______________ tcrnal views of the LF4[14 converter are shown in 1 ifiiires 3,2 and 3.3,_______ ________

IMPORTANT

The apparatus should not be provided with the cab'c glands.

Please prepare yourself for the cable glands which could be used in Division2 hazardous locations.

Outline Drawing

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Terminal Board ol'LF404 Converter

interna] gi\>uniJing terminal

Power supply lerminal:^

Figure 3.2 Terminal Board of LF404 Converter

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Control switch or keys of LF404 Converter

LF4M v^ithout LCD Display

LCD display

Control keys

LF4(W wilh TXD Display

Figure 33 Control switch or keys of LF404 Converter

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4. Installation

Safety Precautions for Installation

A WARNING

Do not live circuits under environmeiu of explosive aimosphcrcs.

0	Live part of electric circuit or a high tompcralure department can
	cause explosion.
DON’T
Do not use parts of other products.
DON’T0	Protective performance degradation for hazardous locatinn can
	cause explosion.
l>o not Jive circuits While assembly of all components is not over.
DON’T0	Protective performAnce degradation for haijardous location can
	cause explosion.

Install per the National r.lectricnl Code for the US (NEC, AN\SJ/NFPA 70) and the Canadian Electrical code for Canada (CEC» CAN/CSA-C22»!).

O	Unsuitable conduit connections for hazardous location can cause
	explosion.
	DO

A CAUTION

	■ Install a switch and fuse to isolate	■ Use an appropriate device to carry and
	the LF434/LF404 from main power.	install the LF434/LF404.
	Power supply from main	If his product falls to the
	power can cause electric	ground, injury, or
	shock or ci rcu It	malfunction of or damage to
	DO breakdown.	PQ the product, can he caused.
	■ Do not modify or disassemble the	■ Ground the LF434/LF4M
	LF434/LF404 unnecessarily.	independently from power equipment.
	Modifying or
	disassembling this product	Operaliiig this product without
	1 jjw can cause electric shock,
		grounding can cause electric
	malfunction or damage to
		0 Q sh ock or m a Ifu notion.
	DON’T this product.
	■ Do not work on piping and wiring	1 he label shown left is placed
	with wet hands.	near tile terminal board for
	Wet hands may result in	power input.
		/ J \ (A black border and .symbol on
	V Jy electric shock
		yellow triangle)
	DON’T	be alert to dcctric shock.

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4.1 Location

['ey fielect the inslallatioi] site, follow the precautions described below:

■Avoid places where fluid runs in a pulsating form.

■Avoid places within the immediaic proximity of equipment producing declricul inleгf^^rencc (such as motors, transformers, radio irunsmittcrs, electrolytic ceils, or other equipment causing electromagitclic or electrostatic interference),

■Avoid places where excessive pipe vibration occurs.

■Avoid places where there is direct sunlight. !f this is unavoidable, use an appropriate shade

■Avoid places where corrosive atmospheres or high humidity conditions obtain,

■Avoid places of too great an elevation or constricted areas where clearance for installation or maintenance work is not provided,

■Design piping so that the dcicetor pipe is always filled with fluid, whether the Quid is flowing or not,

■The LF434 detector has no adjustable piping mechanism. Install an adjustable short pipe w'here needed.

■Chemical injections should be conducted on the downstream side of the flowmeter.

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4*2 Mounting Procedure

A CAUTION

■Use ati approprìate devìce lo carry and instali thè LF434/LP404*

_ If his product fallii to thè

A & g round, i nj u ry, of malfuiiction of or damage

DO lo thè produci, can be caused.

■Tum off mains power before working on pipes.

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

DONT

4*2,t Pipe checks

Before installing pipes, cheek for iuiy leanitig or misplacement (or eccentricity) as iJlusitratcd in Figure 4.1. An attempt to unreasonably connecting pipes that are inclined may lead to a detector breakdown or fluid leakage. Connecting pipes in an eccentric state may also cause local wears and tears of linings and grounding rings, as well as measurement errors.

Before installing pipes* make sure to flash the interior of the pipes to remove deposited

matters.

(a) Pipe leaning

(b) Pipe axis misplacement (or eccentricity)

Figure 4.1 Pipe leaning and axis misplacement

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4.2.2 Installation Procedure

To mouiu thu LF434/J.F404, plai:c il between Itic upstream and downstream pipe flanges

and tighten it with flange holts and nuts. See f igure 4,2 T Tablc4,1 and follow ihe

procedure below:

1. Place one of the flange packing next to the upstream (or downstream) pipe llattge. Altgi^ the holes of the packing with those of the flange so that the holes arc not obstructed.

2, Insert the Lh’434 detector in pipeline in accordance with the flow direction arrow on the detector.

3, Insert the bolts, one at a time, through the hole in the upstream (or downstream) pipe flange and packing, and then through the hole of the detector flange. Then thread nuts, one at a time, on each end of the bolts, finger-tighten. This will help support the detector on one side.

4, Insert the downstream (or upstream) packing between the detector flange and the down­ stream (or upstream) pipe flange. Align the holes of the packing with those of tlie flanges so that the holes are not obstructed.

5.Inert the bolts, one at a time, through the hole in the downstream (or upstream) pipe flange and packing, and tJien through the hole of the detector flange. Then thread nuts, one at a time, on each end of the holts, finger-tighten. This will help support the detector.

6.While centering Ihe detector with ihe longitudinal axis of the pipeline, tighten the bolts with a wrench diagonally across in even increrr^nis______________________________

IMPORTANr

When high-temperuiure fluid is being measured, radiant heal from the detector pipe surface and adjoining pipes may cause the ambient temperature of the converter to go above 6t)

If the ambient lemperature goes above 60° C, try to lower the temperature by measures such as wrapping heat-insulating materials over the detector pipe and adjoining pipes.

Figure 4,2 LF434/LF4Ü4 flowmeter piping connectinns

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Table 4.1 Bolt length and Nut tightening torque

ANSI class 150

ANSI class 300

Mc(cr size

Machine

Bolts

Clamping

Machine Bolts

c:iamping

Diame­

Length

lorque

Diame­

Length

ttjrquc

P.CS

[N-m]

P.C.S

f^‘m|

ter

linch]

ter

finchl

15mm

1;2”

4

1/2”

2”

5 to 7

4

1/2“

2”

5 hi 7

25irim

1"

4

1/2”

2.25”

10 to 13

4

5.''8”

2.5’'

13 lo 16

40mm

1 L'2"

4

1/2”

2.5’

15 to 18

4

3/4”

2,8"

22 to 28

50mm

r

4

5/K”

2.75”

26 to 32

8

5/8“

2.8”

13 to 16

80mm

T

4

5/8”

3”

33 to 41

8

3/4“

3.4”

20tn25

lOOmm

4"

8

5/8”

.3”

20 O’o 25

S

3/4”

3.7”

24 to 30

15Cmm

6"

S

3/4”

3.25”

46 to 57

12

3/4“

4.1“

30 to 38

20f)mm

8"

8

3/4”

3.5"

6010 75

12

4.7“

47 to

25Umm

10’'

12

7/S”

3.^"

67 10 S3

16

1”

5.4”

57 to 71

500mm

12”

12

7/8”

4”

73(0 91

16

1 i.^S"

5.7”

70 to 88

350mm

14”

12

1”

4.5'

105(0 131

20

1 1.'8“

5.9”

71 to 89

400mm

Ifi”

16

1”

4.5"

98 10 123

20

1 i/4”

6 3”

9810 123

DIN.'BS 1(1

I31N/BS 16

Meier

Hotagon head bolts

Clamping

Jiexagon head boll.s

Clamping

size

P.C.S

Diurne-

I,cngih

lorque

P.C.S

Diame­

Lengih

torque

ler

finml

[ N m J

ter

I m m l

[ N m J

15mm

4

M12

55

5 to 7

4

M12

.55

5 10 7

25mm

4

M12

60

12 to J8

4

M12

60

12 to 18

40mm

4

M16

65

19 to 23

4

M16

65

19 to 23

SOmrri

4

M16

65

26 to 33

4

M16

65

26 to 33

80mm

8

M16

70

17 to 21

8

M16

70

17 to 21

100mm

8

M16

75

20 lo25

8

M16

7.5

20 to 25

150mm

8

M20

80

48 to 60

8

M20

80

48 to 60

200mm

8

M20

85

63 to 79

12

M20

90

42 to 53

250mm

12

M20

90

60 to 75

12

M24

95

72 to 90

300mm

12

M20

65 to 82

12

M24

lOO

78 to 98

35 Omm

16

M20

95

62 to 78

16

M24

l i t )

7 4 t o 9 3

4{)0inm

16

M24

105

93 to 116

16

M27

115

105 to !31

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Table 4«1 Bolt length and Nut tightening torque(contjnued)

M«ler			JIS lOK						JiS 20K
	[Icxaeon head ht>Us					Clamping	Hcxagoit head bolts				Clamping
		Diamc-			length	torque		Djantc-		Length	torque
	P.C.S	icr			f m m l	[N^m]	P.C.S	tcr		[mini	[ N i u J
iSmtn	4	M12	50			5 to 7	4	M12		55	5 to 7
Zinmi	4	M16			55	13 to 16	4	M16		60	13 to 16
40mm	A	M16	60			19 to 23	4	M16		65	] 9 to 23
50mm	4	M)6	60			26 to 33	8	VI !6		65	13 to 16
K{)inm	K	M16		65		17 to 21	8	M2U		75	21 to 26
lOOmm	S	M16		70		20 to 25	8	M20		SO	25 to 32
150mm	K	M20			SO	4S to 60	12	M22		9i)	35 to 44
2№mm	12	M20			SO	42 to 53	12	M22		95	46 to 58
250mm	12	M22			S5	66 to H2	12	M24		110	72 lo<X)
300mm	16	M22		85		54 to 67	16	M24		110	59 to 74
350mm	16	M22				68 to 85	16	M30		125	93 to 116
4(J0mm	16	M24		95		93 to ] 16	16	M30		140	116 to 145

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4.3Piping Connections

(t)Required Pipe Length

[f various; joints are used upstream of Itie deiecior outlet^ llie straight pipe length shown in TiibJe 4,2 is required.

I'able 4.2 Required straight pipe length on the upslreinn side

L:Required straight pipe length—straight pipe leiiglh pius half length of the detector.

D:Nominal hore size (diameter)

NOTES

1.The length of a reducer, if connected, can he counted as a part of the straight pipe

length.

2. No straight pipe length is needed on the downstream side, If a butterfly valve is installed dowiLStream of the detector, do not let the valve plate protrude into the pipe of the detector

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(2) Pipe Orientatir>n

The delector may be installed in hori/ontal, vertical or sloping pipe runs as shown in Figure However, except forhorizonlal iiislallatiuii, Quid should flow from lower lo upper directionsSee Figure 4.3.

Figure 4.3 Detector Piping Orientation

I hc cJccirodcs should be posilioned horizonlaJly against the ground surface in any piping installation. See Figure 4.4.

Cmss-scction A - A

Ground surface

Figure 4.4 [nstallatioti position of the detector

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(3) Flow Direction

Inculi the detector in accord<i!tcowilli (he flow directi on arre won the detector. See Figure 4.ò.

] 11 he act u iit l fi ow mn s opposi te to t h e specif i eci flow d i ree lio it, t ho follo win g d ì spi ay i\lìd

output appears., (For bidirectional multhrange moasurorrient, see 10,3/‘Mulii-rarige

Functions,’*).

' LCD display (optional)i Instantaneous flow rate—indicates negativo values, Totalized flow—no counts added.

■ Output:Current output— 4.0 mA output; Pulse output^—^No pulses

I'or bidirectional range measurement, the flow in opposite direction results in a positive

output value. Sec 10.3, ‘"Multi-range Functions.*’

Flow direction arrow

Figure 45 Flow direction arrow on the detector

(4) Preventing an Empty Pipe Condition

Design an upright pipe run (Figure 4.6) or sufficicni head pressure (Fig. 4,7) at the downstream detector outlet if there is a possibiiity of the detector pipe becoming emptied*

Upright pipe run

Figure 4.6 Detector with an upright pipe run at downstream outlet

Detector

CH

Figure 4.7 Detector with suftldecit head pressure at downstream outlet

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(5) Supporting Pipe

Fix the relevant pipes Installed on both sides; of the detector by attach fittings, etc. to support the pipe, By supporting the pipes, not only the pipe vibration is reduced but also the damage to the pipes by the dectmmagnctic flow'metcr’s weight and the fluid ma5;s. And it protect from fluid leakage at flange face (sec Figures 4.8 and 4.9),

Pipe support fittings

Pipe support fittings

/////^//////////////////////////

Figure Example of Hpe Fixing Procedure

t

K'5-5!

-flii

7777////7/777777777777777777777777777777777777777777777777777777~

Figure 4,9 Moclel Diagram of Unsuppuried Pipes

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(6)Gruunding

The grounding [ermin^l of ihc Ll'434/Lh4t)4 flowmeter ithould be grounded with 100 ohm or less ground resistance. Use a heavy copper braid or wire (cross-sectional area mm" minimum) to ground the terminal anJ make it as shon as possible. The terminal is M4 size and an M4‘sizc crimped ring lug should be used to connect the wire to the terminal. Avoid a common ground where earth current may flow, An independent ground is preferable. Sec Figure 4,li), for a conductive pipeline grounding and non-cjondactive pipeline grounding procedures.

To prevent a two-poinl grounding, ground the shielded cable on the receiving instrument side.

I If connection pipe is conductive: Connect between the grounding terminal and both ends of the mating flanges with a heavy copper braid or wire (cross-section 5,5 mm" minimum).

If connection pipe is non-conductive;

L’se H heavy copper braid or w ire (cross-scction 5.5 minimum) to ground he terminal w'jth 100 ohm or less ground resistance.

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5. Wiring

A WARNING

DO NOT DiSCONNfXT WHILE CIRCUIT IS LIVE UNLESS LOCATION IS KNOWN TO BE NONHAZARDOUS*

0 Live pari of eleciric circuit or a high tempeniiure deparimciit can

cause explosion.

DONT

Do not live circuits While assembly of all componems not over.

0 Protective performance degradalioii fur haiiarduus lucalion can

cause explosion.

DON’T

IJnstail per the National Electrical Code for Che US (NEC, ANSI/NFPA 70) and the Canadian Electrical code for Canada (CEC, CAN/C5A-C22,1)<

O	Unsuiiable conduit connections for hazardous location can cause
	explosion.
	DO

A CAUTION

	■ Do not work OR piping and >viring		■ Ground the LF434/LF404 properly.
	with wet hands.
	0	Wet hands can cause system	o	Operating this product wilhoul
		failure.		a grounding can cause system
	DON’T		DO	malfunction.
	■ Do not modify or disassemble the		■ Prepare yourself for the cable glands
	LF434/LK4fl4 unnecessarily»		which could l>e used in Division 2
		Modifying or disassembling	hazardous locations»
				Tite apparatus should not be
	t this product can cause elec-			provided with the cable glands.
		trie shock, malfunction of or
			DO
	DON’T damage TO ihis product»
	■ Use the proper cables for wiring of		A	The label shown left is placed
	power and I/O <
		Using a cable other lhan the		near the terminal board for
		one specified may cause sys-		power input.
	/ J \ tern failure or damage and			Be alert to electric shock.

mav break, waterproof.

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Howmeter accuracy mfiy be affected by the way wiring isS executed. Proceed witii w-iring taking the following precautions:

(1)Select the cable runs away from electrical equipment (motors, transformers, or radio transmitters) which causes eleciromagnciic or dcctrosiatic interference.

(2)Deterioration of llow^meter drcuil insulation occurs if the converter interior or cable ends get wet or Ituniidilied. This in turn causes malfunction of flowmeter or noise problems. Avoid a rainy day if the flow meter is to be installed outdoors. Even indoors^ prevent water from splashing over ihc flowmeter. Try to finish the wiring as quickly as possible

(3)The converter has a surge-absoit>ing barrier installed inside. Therefore, do not conduct a withstand voltage test for the converter. J o check the insulation of the converter, use a voltage of 250 V dc or less.

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5Л Cables

Use the kind of ciibles shown in Tahle lowire the converler.

Table 5.1 Cables

Name	Cable type	Nominal	Overall diameter
		cross-.sectional
		area
Power cable	Three-wire sheathed	2mm^	11 to 13 mm
	cable (Note)
1/0 cable	I'he number of wires for the output cable depends on Ihc
	system spccificiirions. Use a shielded cable with nominal
	cross-scctional area of 1.25 inrii^ and overall diameter of
	n to 13 mm.

Notei Use a four-wire cable if the arresters are to be used. See Figure 5.1 below,

5.2 External Device Connections and Grounding

The terminal board connections of the LF434/LF404 flowmeter arc shown in Figure 5.1.

Proceed with wiring as described in Section 5.4, '‘Wiring Procedure.”

If power supply is specified as DC, use M as positive (+) and 1.2 as negative (-) terminals.

Plown-fceler

[C1 |~1^Трс|51с|[сОы[ ni|oQ^noi| -

Instrument Panel: ordered separately

■; Cument output (4—20 mA dc) - Digital Output I

; ■; r>igilai

2

:Digjiit! Input (20 to 30 V de)

*1	Cixrourided with 1 (X)Q or less

		’ ■ \ .......... ! ground resistance.
IV wire			— > Power Supply
		It “"2	^
5.5тзп"	1/0 cable
or more		R>wer cable	Power Switch

*^1 To use the arresters, ground the ON 13 terminal using the wire shown in broken line.

*2 Locate an external double-pole power switch on the power line near the flowmeter and within easy operation. Mark one the switch as the tlisconnecting device for the flow^meler.

Use an appropriate switch of the rating shown below:

Recommended sw'itch rating; Rating 25D V ac, 6A or more Inrush current 15 Лог more

Figci re 5.1 Term in a t В lock Connection s

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IMPORTANT

(1) The grounding terminal of the LF434/Lr404 ilowmeter should be grounded with 100 ohm or less ground resistance. Use a heavy copper braid or wire (cross-sectional area .S..'? inm' minimLim) to ground the icrminaJ and make it as short as possible, ITie terminal is M4 size and an M4-size crimped ring lug should be used to connect the wire to the lermina!. Avoid a comirion ground where earth current may flow'. An independent ground is preferable. See Figure 5,2. fora

conductive pipeline grounding and non-conductive pipeline grounding procedures.

(2)To prevent a tw'o-point grounding, ground the shielded cable on the receiving instrument side.

I If conneetton pipe is conductive:

Conned between the grounding terminal and both ends of the mating flanges with a heavy copper braid or wire {cross-section 5,5 mm" minimum).

If connection pipe is non-conductive:

Use u heavy copper braid or wdre (cross-section 5.5 mm^ minimum) to ground he terminal with 100 ohm or Jess ground resistance.

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53 Digital I/O ConnecUons

Pigiial li O terminals consist of conti.ct output terminals (standard DOl and optional D02), voltage signal input terminal (1)1, optional), and signal common terminal (COM), Each terminal (DOl, D02 and Dl) is isolated from internal circuits, Terminal (COM) is the signal common for the other three terminals (PC I, D02 and DI).

Functions can he assigned for each terminal with the LCD control keys (option). See Chapter 10, “Digital t/0 Functions.’"

To ciinnect an electromagnetic relay or counter to the contact output terminal (DOl Or D02), put a surge^absorbing diode into the input circuit of the relay or counter. See Figure 5,3 for an example of electromagnetic counter connection.

Solidbtate rchiy

Note 1; Use a surge-absorbing diode of the rating: current rating lA and voltage rating 200 V minimum.

Note 2; The Solidstaic relay, photo-coupler and resistor are not provided fiir the standard model (the one with no digital I/O specifications), Leave the terminals for D02 and Di open.

Figure 53 Electromagnetic Counter Connoction Example

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