TLV VFM-T2 User manual

172-65256M-00 (VFM-T2) 7 September 2001

Vortex Flowmeter Counter

VFM-T2

ISO 9001/ ISO 14001

Manufacturer

Kakogawa, Japan

is approved by LRQA LTD. to ISO 9001/14001

172-65256M-00 (VFM-T2) 7 Sep 2001

Contents

Introduction.......................................................................2

Safety Considerations .......................................................3

Handling Precautions ........................................................4

Verifying the Nameplate..................................................................................4

Precautions When Transporting the Product..................................................4

Precautions When Storing the Product...........................................................4

General Description...........................................................5

Part Names and Exterior Dimensions................................5

Instructions for Installation.................................................5

Installation Location........................................................................................5

Installation Method..........................................................................................6

Instructions for Wiring Connections...................................6

Wiring Cables .................................................................................................6

Wiring Method.................................................................................................6

Description of the Field Wiring Terminal Block ...............................................7

Input Signal Connection..................................................................................7

Configuration Block Diagram.............................................8

Functions and Operation...................................................9

The LCD Counter Display...............................................................................9

Verifying the Meter Factors.............................................................................9

Calculating Total and Instantaneous Flow Rates..........................................10

Setting and Adjusting Jumpers, Switches and Volumes...............................10

Internal Construction........................................................................................... 11

Removing the Internal Components.................................................................... 11

Waveform Shaping Function............................................................................... 11

Functions to Establish Factors............................................................................ 13

Modifying the Pulse Width Output Signal (Optional)............................................ 14

Operation and Adjustment for Setting and Modifying the Analog Output Circuit

(Optional)............................................................................................................ 15

Operation........................................................................17

Preparations Before Operation.....................................................................17

Operation......................................................................................................17

Troubleshooting ..............................................................17

Standard Specifications...................................................18

Product Warranty............................................................19

172-65256M-00 (VFM-T2) 7 Sep 2001

Introduction

Thank you for purchasing the vortex flowmeter counter.

This product has been thoroughly inspected before being shipped from the

factory. When the product is delivered, before doing anything else, check the

specifications and external appearance to make sure nothing is out of the

ordinary. Also be sure to read this manual carefully before use and follow the

instructions to be sure of using the product properly.

If detailed instructions for special order specifications or options not contained

in this manual are required, please contact for full details.

Please keep this manual in a safe place for future reference.

Please read this manual in conjunction with the VFM Vortex Flowmeter

Transmitter “Instruction Manual”.

172-65256M-00 (VFM-T2) 7 Sep 2001

Safety Considerations

•Read this section carefully before use and be sure to follow the instructions.

•Installation, inspection, maintenance, repairs, disassembly, adjustment and

valve opening/closing should be carried out only by trained maintenance

personnel.

•The precautions listed in this manual are designed to ensure safety and

prevent equipment damage and personal injury. For situations that may

occur as a result of erroneous handling, three different types of cautionary

items are used to indicate the degree of urgency and the scale of potential

damage and danger: DANGER, WARNING and CAUTION.

•The three types of cautionary items above are very important for safety: be

sure to observe all of them as they relate to installation, use, maintenance

and repair. Furthermore, TLV accepts no responsibility for any accidents or

damage occurring as a result of failure to observe these precautions.

Symbols

Indicates a DANGER, WARNING or CAUTION item.

DANGER Indicates an urgent situation which poses a threat of death or

serious injury

WARNING

Indicates that there is a potential threat of death or serious

injury

CAUTION Indicates that there is a possibility of injury or equipment /

product damage

CAUTION

Do not touch the terminals during transmission.

Failure to observe this precaution could result in such hazards as

damage to the product,malfunctions, electric shock or fire.

Make sure the power supply is OFF before carrying out work on

the wiring or inspections involving disassembly.

If such work is carried out with the power on, there is a danger that

equipment may malfunction or electric shock may occur, leading to

injury or other accidents.

Make sure that wiring work requiring a special license is carried

out only by qualified personnel.

If carried out by unqualified personnel, overheating or short circuits

leading to injury, fires, damage or other accidents may occur.

172-65256M-00 (VFM-T2) 7 Sep 2001

Handling Precautions

This product has been thoroughly inspected before being shipped from the factory.

When the product is delivered, check the exterior for any damage.

This section outlines precautions to be taken when handling the product.

Verifying the Nameplate

This product is assembled and adjusted to

meet each specification. The model and rated

specifications are found on the product

nameplate located on the outside of the case.

Verify the number starting with “VT” on the

sticker located on the display panel and the

number starting with “VFM” engraved in the

Tag. No. space on the nameplate of the VFM

transmitter to which the counter is connected.

Location of Nameplate

uu When making inquiries concerning the product, please be prepared to

provide details such as the product name, model, product number and

rated specifications.

Precautions When Transporting the Product

1) To prevent damage from accidents during transport, where at all possible, transport

the product to the installation site in the original packaging in which it was shipped

from TLV.

2) During transport, avoid subjecting the product to strong impacts or shocks.

Precautions When Storing the Product

If the period of time between the when the product is delivered and when it reaches

the installation site is long, special consideration must be given to the possible

occurrence of unexpected accidents. When it is known in advance that the storage

period might be long, be sure to observe the following precautions.

<Caution> After the product has been stored for a long period of no use, it

is likely that an inspection of the internal components is necessary.

Please consult with TLV.

1) Where at all possible, store the product in the original packaging in which it was

shipped from TLV.

2) Select a location for storage that meets the conditions set forth below.

ŸA location in which it will not be exposed to rain or water.

ŸA location in which it is subjected to minimal vibration or impacts.

ŸA location in which it will experience only slight fluctuations in temperature

and humidity (approximately 25°Cand 65%).

Nameplate

172-65256M-00 (VFM-T2) 7 Sep 2001

General Description

Make sure the power supply is OFF before carrying out work on the wiring

or inspections involving disassembly. If such work is carried out with the

power on, there is a danger that equipment may malfunction or electric

shock may occur, leading to injury or other accidents.

Make sure that wiring work requiring a special license is carried out only

by qualified personnel. If carried out by unqualified personnel,

overheating or short circuits leading to injury, fires, damage or other

accidents may occur.

Do not touch the terminals during transmission. Failure to observe this

precaution could result in such hazards as damage to the product,

malfunctions, electric shock or fire.

This vortex flowmeter counter is built around a single-chip microprocessor and is

lightweight and compact in design. It offers four independent functions (cumulative

total flow, instantaneous flow rate, hourly and per-minute total flow and resettable

total) in a single unit. Optional 4 –20mA DC and 1 –5V DC flow rate outputs are

also available.

Part Names and Exterior Dimensions

Instructions for Installation

Installation Location

1) Select a location that has no or extremely slight amounts of mechanical vibration or

corrosive gas.

2) Select a location with low humidity, of typical room temperature and in which only

slight fluctuations in temperature are experienced.

NOTE: Though the acceptable operating temperature range is −10°C to

+50°C, whenever possible select a location that is of typical room

temperature.

3) Secure sufficient space to the rear of the counter for ease of wiring and

maintenance.

8-Digit LCD Display

Analog Output Terminal

Block (Option)

M3.5 ×4P

[RESET]

Button

Panel-mount

Exterior Terminal Block

(M3.5 ×8P)

Units: mm

Select

Switch

[MODE]

Button

172-65256M-00 (VFM-T2) 7 Sep 2001

Installation Method

1) The counter is designed for panel mounting.

2) To install the panel, follow the steps below.

ŸAfter removing the panel-mount fitting from the body, insert the body into

the front of the panel.

ŸUsing the panel-mount fitting, secure it to the panel from the interior of the

panel.

Instructions for Wiring Connections

Make sure the power supply is OFF before carrying out work on the wiring

or inspections involving disassembly. If such work is carried out with the

power on, there is a danger that equipment may malfunction or electric

shock may occur, leading to injury or other accidents.

Make sure that wiring work requiring a special license is carried out only

by qualified personnel. If carried out by unqualified personnel,

overheating or short circuits leading to injury, fires, damage or other

accidents may occur.

Do not touch the terminals during transmission. Failure to observe this

precaution could result in such hazards as damage to the product,

malfunctions, electric shock or fire.

Wiring Cables

Be sure to use electrostatically-

shielded, polyethylene-insulated, vinyl-

sheathed control cables (CEVS 0.75 to

2 mm2, 2-or 3-conductor) or the

equivalent as input and output signal

lines.

Wiring Method

1) It is recommended that cables be routed through conduits.

NOTE: Be sure to route the power cable independent of the input and output

control cables.

2) Keep the cables away from other power cables or power circuits to prevent

inductive interference. If inductive interference is suspected, use devices such as

capacitors or surge suppressors where necessary.

3) Use spade terminals to ensure good electrical connections. The terminals for

connections are located on the rear of the unit.

Terminal Block

(Optional Analog Output

Mounted Here)

Terminal Block

Units: mm

Panel-cut Dimensions

172-65256M-00 (VFM-T2) 7 Sep 2001

Description of the Field Wiring Terminal Block

Before connecting the cables, make sure that the

flowmeter transmitter is compatible with the

counter. Acceptable combinations of these units

can be determined by checking their model number

and instrument number. Connect the wiring

correctly.

NOTE: The upper terminal on the rear of the

counter is found only on models with analog

output.

Exterior Connection Terminal

Block Diagram

<Caution> As incorrect combinations could lead to serious damage to

these units, be sure to check again after connecting the cables.

Description of Field Wiring Terminals

Name Terminal No. Connection and Specifications

Power Supply 6

L1 7

L2 100V, 110/115V, 200V, 220/230V ±10%

50/60Hz

Ground 8Must be grounded

Pulse

Input Current Pulse 1, 21: +(+24 or 12V DC) 2: −

Pulse

OutputsOpen Collector 4, 54: +5: −

Optional Feature

<Caution> If not using

terminal 1 and 2, they

4 –20mA DC 1, 21: +

2: −

Analog

Output

1 –5V DC 3, 4 3: +

4: −

MUST be connected using a

wire link. If they are not linked,

analog voltage does not reach

terminals 3 and 4.

Input Signal Connection

Current Pulse

Empty

Terminal

172-65256M-00 (VFM-T2) 7 Sep 2001

Configuration Block Diagram

lExplanation of Various Circuits (By Block)

•Power Circuit: generates various internal voltages from the power supply

voltage (POWER)

•Doubler Circuit: converts low frequencies* into frequencies that can be

processed by the F/I circuit in the next step

* When the full scale frequency is in the range of 2 –4Hz and the waveform

ratio of the input pulse is 1:1: J1 CLOSE.

•F/I Circuit: converts an input frequency of 4 –20mA or 1 –5V to an analog

signal

Transmitter Power Source

Pulse Input

Schmitt

Voltage Drop

Optional

OPEN: Single

CLOSE: Double

Analog Output

Pulse Output

Power Circuit

Optional

Synchronizes

Input Frequency

Doubler

Filter Factor

Frequency

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