Seametrics JWAVE Manuel utilisateur

PROUDLY

MADE

IN THE

USA

ISO

9001:2008

jWAVE™

Portable Transit Time Ultrasonic

Flow Meter Instructions

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 2 seametrics.com

General Information

General Information ...................................................................................................................................................Page 3

Specications ................................................................................................................................................................Page 3

Meter Features..............................................................................................................................................................Page 4

App Features .................................................................................................................................................................Page 4

Dimensions ....................................................................................................................................................................Page 5

Technology.....................................................................................................................................................................Page 5

Do’s and Don’ts ............................................................................................................................................................Page 5

App Installation

Getting Started.............................................................................................................................................................Page 6

Location Setup..............................................................................................................................................................Page 6

Parameter Setup ..........................................................................................................................................................Page 7

Flow Meter Installation

Straight Pipe Recommendations...........................................................................................................................Page 8

Full Pipe Recommendations....................................................................................................................................Page 9

Flow Meter Orientation.............................................................................................................................................Page 9

Transducer Spacing.....................................................................................................................................................Page 10

Power Considerations ................................................................................................................................................Page 10

Installing the Flow Meter..........................................................................................................................................Page 11

Operation

Collecting Your Data...................................................................................................................................................Page 12

Data Logging.................................................................................................................................................................Page 12

Troubleshooting

Problems.........................................................................................................................................................................Page 15

Probable Causes...........................................................................................................................................................Page 15

Things to Try..................................................................................................................................................................Page 15

TABLE OF CONTENTS

This device complies with Part 15 of FCC Rules and Industry Canada license-exempt RSS standard(s). Operation is subject to the following two

conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received including interference that

may cause undesired operation. Contains FCC ID: XDULE40-S2, Contains IC: 8456A-LE4S2. CAN ICES-1/NMB-1; CAN ICES-3 (B)/NMB-3(B)

Seametrics jWAVE-01

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 3 seametrics.com

GENERAL INFORMATION

Meet the Seametrics jWAVE. Capture accurate and

reliable ow readings with your mobile device, with less

hassle and in less time—wherever you need a ow or

volume measurement.

No wires. No bulky electronics box to lug around. Your

ultrasonic ow meter hardware installs on the outside of

your pipe in a snap—and senses through the pipe wall.

Your mobile device displays readings and helps you set

up the hardware.

The jWAVE Flow Meter solution starts with the jWAVE App

(downloadable from the app stores) and works on both

iOS and Android devices.

The jWAVE Flow meter is a compact, strap-on transit

time ultrasonic transducer device. The jWAVE operates

by alternately transmitting and receiving a burst of

sound energy between two transducers. It then wirelessly

transmits ow measurements to your mobile device. Use

Specications*

the portable data logger to conveniently record ow for

as long as 14 days or as little as one minute.

The jWAVE is highly portable. Just bring the rechargeable

clamp-on meter in its lightweight, weatherproof case,

along with a tablet or smartphone (iOS or Android).

Bluetooth connectivity replaces wires, and the jWAVE App

guides you through setup.

The convenient cam cleats let you mount the ow

meter on any pipe in seconds—no cumbersome clamps

required.

Bi-directional readings are transmitted to your mobile

device for display and your location’s settings are stored

in the jWAVE App, ready for reuse.

When you are done, simply release the cleats, then take

the compact meter on to your next location.

Pipe Size 2” to 20”

Pressure Drop Zero

Materials Body Anodized aluminum channel, acetal end housings and feet

Mounting Straps EPDM

Temperature Ambient & Fluid -20˚ to 150˚ F (-29˚ to 65˚ C)

Display English and metric units provided on app

Flow Operation

Range

Bidirectional; 0.1 ft/s to 20 ft/s (0.03 m/s to 6 m/s)

Turndown 200:1

Accuracy 1% to 2% of reading (typical)

Repeatability 0.5%

Output Signal Wireless Bluetooth 4.0 (BLE) connectivity to iOS¹ or Android² device

Power Rechargeable battery (up to 12 hours), 1W max, 150mA max current, 5 “AA” NiMH 6V pack with

thermistor, 5 month shelf life

Power Adapter For recharging battery - must use the 12W USB power adapter supplied with the jWAVE

Installation 10 pipe diameters upstream, 5 diameters downstream for optimal performance (typical)

Environmental IP65

*Specications subject to change • Please consult our website for current data (www.seametrics.com).

¹The following iOS devices support Bluetooth 4.0 (BLE): iPhone 4S and later, iPad 3rd generation and later, iPad mini, iPad Air, and iPod Touch 5th generation.

²If you have an Android device, check the settings on the device or specications for the device to be sure it supports Bluetooth 4.0 (BLE).

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 4 seametrics.com

Meter Features

GENERAL INFORMATION

USB External

Power Plug &

Battery Charger

Integrated Ruler

Power Button

Bi-directional

Flow Sensing

Moveable

Acoustic

Transducers

Cam Cleat for

Mounting Strap

Anodized

Aluminum Channel

Rugged Acetal End

Housing & Foot

Interactive smart phone/tablet control

app—iOS or Android

• Handy built-in pipe

specications—or add your

own

• Save location information

• Drag and drop output

selection

• English or metric units

• Select liner and liquid

types—or dene your own.

• Easy-to-use data logging

App Features

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 5 seametrics.com

Dimensions

GENERAL INFORMATION

Technology

The transit time ow meter operates by alternately transmitting and

receiving a burst of sound energy between the two transducers.

The burst is rst transmitted in the direction of uid ow and then

against uid ow.

Since sound energy in a moving liquid is carried faster when it travels

in the direction of uid ow (downstream) than it does when it travels against uid ow (upstream), a differential

in the travel times will occur. The sound’s travel time is accurately measured in both directions and then used to

compute the ow rate.

Sound waves can bounce in many directions as they travel through various materials. The more the sound waves

scatter, the fewer actually reach the second transducer. The jWAVE uses sophisticated methods to maximize

transducer efciency, thus allowing the unit to run on very low power. Focusing of the sound wave is also

important to ensure it reaches the second transducer without degrading. This is accomplished by accurately

spacing the transducers to allow for optimum sound transit between transducers. The jWAVE app computes this

spacing based on the pipe size, pipe material, and type of liquid.

Transit time technology works best in clean or mildly dirty water or uids with minimal turbulence or ow

distortion.

28.4” (72.1cm)

23.5” (59.7cm) 2.4”

(6.1cm)

3.8”

(9.65cm)

28.4” (72.1cm)

2.4” (6.1cm)

Do’s and Don’ts

Do charge your jWAVE at least once a month.

Do store your jWAVE in a dry, inside area when

not in use.

Do store your jWAVE fully charged.

Do keep your jWAVE in its protective case when

transporting to prevent damage.

Do gently clean the transducer pads regularly

with isopropyl alcohol to prevent hardening

and build up of used coupling gel.

Don’t charge with any charger other than the

12W charger supplied. Other chargers may

damage the jWAVE.

Don’t store, transport, or use your jWAVE where

the device may exceed 150˚F (65˚C)—

battery may leak or explode!

Don’t bang or drop the jWAVE on hard objects or

surfaces.

Don’t nick the transducer pads.

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 6 seametrics.com

Getting Started

Begin by downloading the Seametrics jWAVE App to your iPhone™, Android phone, or other Bluetooth enabled

mobile device from the Apple Store™ or Google Play™. (Note: On an iPad, you must select iPhone Only in the app

store.) If you do not have automatic updates enabled on your device, be sure to update your app when notied that

there is a new version available.

NOTE: Be sure your mobile device supports Bluetooth 4.0 (BLE).

The following iOS devices support Bluetooth 4.0: iPhone 4S and later, iPad 3rd generation and

later, iPad mini, iPad Air, and iPod Touch 5th generation.

If you have an Android device, check the settings on the device or specications for the device.

Location Setup

Launching the app lands you on the locations screen. The

app always begins with this screen at launch, making

it easy to access previously saved location settings.

Begin by tapping on the add location (+) button.

Give your location a name and then set the specic

parameters for that location. Each location’s settings are

stored in the jWAVE App, ready for reuse.

Add

location

Name

your

location

jWAVE jWAVE

for Agriculture

APP INSTALLATION

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 7 seametrics.com

APP INSTALLATION

Parameter Setup

Units

Toggle between

English and metric

units of measure.

Select Flow Rate,

Volume, and

Velocity from our

pre-loaded values.

Display

The main screen

displays two outputs.

Drag and drop the

two outputs that

you rely on most to

display on the main

screen.

Pipe

Select Pipe Type,

Size, and Wall

Classications from

our pre-loaded

values or add custom

values by selecting

Custom under Pipe

Type. When entering

a custom type, you

must supply the

outer diameter, wall

thickness, speed of

sound through the

pipe material, and the

surface roughness—

enter zero if unknown

roughness.

Liner

Switch between liner

and no liner. When

selecting Liner

Enabled, enter

Liner Thickness

and choose Liner

Material from our

pre-loaded list or add

custom values. When

adding a custom

material, you must

enter the speed of

sound through that

material.

Liquid

Select Liquid Type

and Temperature

from our pre-loaded

list of values or add

a custom liquid

type. When adding

a custom liquid, you

will need to enter

the speed of sound

through that liquid,

the viscosity, and the

density.

Use the handy parameter selection screens to set your units of measure and display preferences.

Conveniently select pipe, liner, and liquid specications from lists of pre-loaded values. Don’t see the

right option? Add your custom values!

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 8 seametrics.com

Straight Pipe Recommendations (X = diameter)

5X15X

20X

40X

5X15X

30X

40X

Reduced Pipe

Two Elbows In Plane

Two Elbows, Out Of Plane

Expanded Pipe

Swirling Flow:

Propeller Meter

Partially Open

Buttery Valve

Swirling Flow:

FLOW METER INSTALLATION

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 9 seametrics.com

Full Pipe Recommendations

Not Ideal:

Allows air pockets to form at meter

Recommended:

Keep pipe full at meter for accuracy

Not Ideal:

Air can be trapped

Recommended:

Allows air to bleed off

Not Ideal:

Post-valve cavitation can create air pocket

Recommended:

Keeps pipe full at meter for accuracy

FLOW METER INSTALLATION

Horizontal (3 o’clock or 9 o’clock

position) is the preferred installation

orientation, since it avoids problems

with trapped air and sediment.

Flow meter Orientation

Fair — Unacceptable if pipe

contains air

Best Position

Air bubbles

Sediment

Fair — Unacceptable if pipe

contains sediment

jWAVE INSTRUCTIONS

Seametrics • 253.872.0284 Page 10 seametrics.com

Once you entered your parameters in the previous section, the app

automatically computed the proper transducer spacing. This is shown at the

bottom of the main app screen.

The next step is to adjust the transducer spacing on the ow meter, as

follows:

1. Rotate the black knob to unlock the horizontal motion for each

transducer.

2. Move the transducers to the specied transducer spacing by sliding

them along the integrated ruler. Note: It is not necessary to start at

zero on the ruler, so long as the actual spacing is correct.

3. Lock into place using the black knobs. This is important to prevent the

transducer spacing from moving when mounting the ow meter!

FLOW METER INSTALLATION

Transducer Spacing

Black locking knob

on transducer

Integrated

ruler

Power Considerations

Your jWAVE Flow meter battery has been fully charged at the factory before shipping and is ready to go.* When it’s

time to recharge the battery, the app will let you know.

When using the datalogging function and recording for more than 12 hours, the jWAVE must be connected to a power

source, such as a portable USB power bank or a USB power adapter connected to an external power source.

* On a full charge, the jWAVE will have a shelf life of up to ve months. It is a good idea to charge the unit for a full ve hours if it hasn’t been used for

a month or two. On a full charge the meter should operate for up to 12 hours of continuous use. Note that if the battery is at, the power button LED

will blink rapidly for ve seconds and then the meter will turn off.

To prevent damage, you must use the

supplied 12W charger ONLY.

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