Seametrics jWAVE Instructions Manual
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jWAVE™
Portable Transit Time Ultrasonic
Flow Meter Instructions
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TABLE OF CONTENTS
General Information
General Information ...................................................................................................................................................Page 3
Specications ................................................................................................................................................................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
jWAVE INSTRUCTIONS
Operation
Collecting Your Data ...................................................................................................................................................Page 12
Data Logging .................................................................................................................................................................Page 12
Troubleshooting
Problems .........................................................................................................................................................................Page 15
Probable Causes ...........................................................................................................................................................Page 15
Things to Try ..................................................................................................................................................................Page 15
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 • 253.872.0284 Page 2 seametrics.com
Seametrics jWAVE-01
GENERAL INFORMATION
jWAVE INSTRUCTIONS
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
Specications*
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
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
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
*Specications 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 specications for the device to be sure it supports Bluetooth 4.0 (BLE).
Bidirectional; 0.1 ft/s to 20 ft/s (0.03 m/s to 6 m/s)
thermistor, 5 month shelf life
Seametrics • 253.872.0284 Page 3 seametrics.com
GENERAL INFORMATION
Meter Features
jWAVE INSTRUCTIONS
Bi-directional
Flow Sensing
Power Button
App Features
USB External
Power Plug &
Battery Charger
Anodized
Aluminum Channel
Integrated Ruler
Moveable
Acoustic
Transducers
Cam Cleat for
Mounting Strap
Rugged Acetal End
Housing & Foot
Interactive smart phone/tablet control
app—iOS or Android
• Handy built-in pipe
specications—or add your
own
• Save location information
• Drag and drop output
selection
• English or metric units
• Select liner and liquid
types—or dene your own.
• Easy-to-use data logging
Seametrics • 253.872.0284 Page 4 seametrics.com
GENERAL INFORMATION
Dimensions
jWAVE INSTRUCTIONS
28.4” (72.1cm)
2.4” (6.1cm)
28.4” (72.1cm)
3.8”
(9.65cm)
23.5” (59.7cm)
2.4”
(6.1cm)
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 efciency, 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.
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.
Seametrics • 253.872.0284 Page 5 seametrics.com
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.
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