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USB

Installation and Programming Guide

MONITOR UNIT

SENDER

SENSOR

USB CABLE

6 X AA BATTERIES

INSTALLATION GUIDE

CD SOFTWARE APPLICATION

TROUBLESHOOTING

ISSUE

POSSIBLE CAUSE 

TRY THIS

Display is blank

Batteries

Check they are correctly installed or 
replace batteries

“0” is displayed

No current detected

1. Check Sensor is correctly 

attached to and closed properly
over Live cable (

SEE STEP 5

)

2. Check Sensor is connected 

to Sender

“•”“----”  are 
displayed

Batteries or lost synchronisation

Check batteries are correctly 
installed or replace batteries or
start full reset process.

Readings appear high

Tariff or voltage settings may be 
incorrect

Check your tariff and voltage 
settings (see overleaf) and reset if 
necessary

“----” in display

Monitor Unit & Sender have lost 
radio link and repeating 

STEP 2

synchronise units has failed

Tip:

 After resetting the Display Unit, it 

can take up to 2 minutes to establish a 
link with the Transmitter. Press and hold 
the

CHECK

 button on the Transmitter 

until the red LED flashes. 
This will then transmit every 2 seconds.

If you wish to review any of the programmed settings at any time, press and hold the 

SET

 key until the 

SET

 icon 

appears and you hear a short beep.

CLOCK

 will appear in the lower right hand screen. 

Press 

MODE

 key to scroll between the different program settings, 

DATE, TAR 1, TAR 2, TAR 3, TAR 4, TAR 5, TAR 

6, ALARM, CURR, VOLT, TEMP, GHG, END

 until you reach the one you wish to change. 

Press 

SET

 key to confirm. 

Refer to 

Programming Your OWL

 again and follow the instructions in this guide to change the settings.

HOW TO READ YOUR DATA:

Your Display unit will show 

COST

 in the main screen. 

To view 

ENERGY

 consumption, press 

MODE

 key once. 

To view 

GREEN HOUSE GAS

 Emissions, press 

MODE

 key again.

To return to the main screen, press 

MODE

 key again.

HOW TO READ YOUR AVERAGE DATA:

Press and hold the 

ADJUST

 key and 

AVERAGE

 data will appear in the bottom right-hand corner. 

AVERAGE 

DAY

 (based on 30 days rolling) will appear first. Press adjust again and 

AVERAGE WEEK

 (based on 30 days 

rolling) will appear, press 

ADJUST

 key again and 

AVERAGE MONTH

 (based on 30 days rolling) will appear.

To return to the real time data display press 

MODE

 key and hold for 2 seconds until you hear a short beep.

HISTORICAL DATA:

The data displayed in the lower right hand screen of your Display Unit will always show the cumulative 
energy/emissions consumption and the total cost to date, or since your last reset.The 

OWL

 can store and show 

accumulated historical data for up to 2 years.
At any time, you can choose to view historical data for comparative purposes. You can choose to view this data from a 
specific day, week, month or 3 month period.
To set the start date for your historical data, press 

MODE

 key and hold for 2 seconds. 

HIST

 will be 

displayed in the main screen and 

YEAR

 in the lower right hand screen. The year in the lower left hand 

screen will flash. Press  

MODE

 key to reduce the Year or 

ADJUST

 key to increase the year that you wish the data to be 

reviewed from. Press 

SET

 key to confirm.

MONTH

 will be displayed in the lower right hand screen and the month will flash in the lower left hand screen. 

Press 

MODE

 key to reduce the month or 

ADJUST

 key to increase the month. Press 

SET

 key to confirm.

DAY

 will be displayed in the lower right hand screen and the date will flash in the lower left hand screen. Press 

MODE

 key to reduce the day or 

ADJUST

 key to increase the day. Press 

SET

 key to confirm. You now have your 

start date set. 
You can now choose your review period. Choose between this day, one week, one month or three months from 
this date. Press 

ADJUST

 to scroll between these options. The data in the lower right hand screen will change ac-

cording to your selection.

HOW TO READ YOUR HISTORICAL DATA:

Your Display unit will show 

HIST

 in the main screen and 

COST

in the top right hand corner of the main screen.

According to the start date and time period you have set you can now view historical cost data.
To view historical energy consumption during this period, press 

MODE

 key once. 

To view historical green house gas emissions during this period, press 

MODE

 key again.

To return to the main historical cost screen, pressand hold the 

MODE

 key again.

REVIEWING YOUR SETTINGS AND READING YOUR DATA

INSTALLING OWL IN A 3-PHASE SUPPLY

If you have a 3-phase supply you will need two additional Sensors and possibly larger sensors 
depending on the size of your cables. Fitting the sensors is the same process as above but you will 
need to identify the correct cables using the information below:

3-PHASE WIRING CODES

L1

L2

L3

Neutral

Earth

UK until April 2006

Red

Yellow Blue

Black

Green/yellow 

striped

 

 

 

 

(green on old installations)

Europe (inc UK)
from April 2006

Brown Black

Grey  Blue

Green/yellow 

striped

If you are unsure about installation please consult a qualified electrician or visit 

www.theowl.com

 for more information

WHAT IS THE ALARM FUNCTION?

The alarm function is designed to warn you when your pre-determined electricity usage peaks 
above a specified rate. This is useful if your household is running on a budget and you need to 
monitor costs closely.

UNDERSTANDING TARIFFS AND TIERED TARIFFS

Electricity suppliers sell electricity at different rates to different people across the country. Rates 
may also vary at different times of the night or day. The rate you pay for your electrity is called a 
“tariff” and is clearly identified on your electrity bill.
Some electricity users will have primary/secondary rates based on usage. To make use of this data 
you will need to calculate an average based on usage and enter this figure into tariff 1.

CAN I MONITOR APPLIANCE LEVEL?

The Sensor is unable to detect current flow when clipped an appliance lead with earth, neutral and 
live cables. The sensor will only work when clipped over a live phase cable as per 

STEP 4.

HOW MUCH DATA CAN BE STORED ON MY OWL+USB?

Data is stored for the last 720 days as a daily value of electricity used, cost of electricity used 
based on Tariff rates entered for that day, and amount of CO2 emissions based on conversion 
factor for that day.  This data is accessible through the History function of the Monitor (see below).
Data is also stored every minute for the last 30 days and this is accessed using the automatic 
download function of the software application supplied with the Monitor.

INSTALLING THE SOFTWARE APPLICATION TO DOWNLOAD THE DATA TO PC?

Please read the User Manual on the Software Application CD supplied with OWL+USB Electricity 
Monitor.  Install the software following the installation guide in the user manual. 
Follow the Getting Started section of the User Manual, to get the New Hardware installed, and to 
add the USB as a “Connected To” device in the software. 

HOW DO I DOWNLOAD THE DATA TO MY PC?

-

Simply connect the mini-USB port of the monitor to the PC, and the last 30 days data (or num
ber days data stored if less than 30 days) will automatically download to the OWL USB Connect2 
database.

DOWNLOAD

HOW OFTEN DO I NEED TO

THE DATA TO MY PC?

Data should be downloaded every 30days since last data download or sooner. 
If 30 days is exceeded since last download, then the data for the days between the last 30 days 
and last download of data will be overwritten in the monitor, hence there will be no data saved for 
those days in the database.

BEFORE YOU START

CHECK YOUR BOX CONTENTS

If something is missing, please contact us: 

[email protected]

Thank you for choosing the OWL

+USB

.

Follow these simple steps to set up your 

OWL

+USB

and you will be able to:

Calculate the amount of power being used, the cost of that power, the amount of associated green 
house gas emissions and download recorded data to your PC.
Before setting up your 

OWL

+USB

, please ensure you carefully read the Safety Precautions.

Before you start installation please ensure you have:

1. An electricity bill with details of your tariff and rates
2. A small cross head or flat bladed screwdriver

Turn over for full

installation instructions

SAFETY INFORMATION

Keep the equipment out of the reach of children, especially infants.
Installation of this product must be carried out by adults only and if there is any doubt, a qualified 
electrician.

Do not install your equipment in a humid room (bathroom, laundry, kitchen etc) or in close proximity to a 
tap or water source. Do not expose the equipment to moisture, splashes or spray. 
The equipment and all associated components are for indoor use and in normal temperature conditions only. 
Avoid extreme temperatures. Store away from sources of heat, ignition or fire.
Do not attempt to open, disassemble or repair the equipment, other than to change the batteries.

The equipment contains a radio transmitter, which may affect the operation of medical or emergency 
equipment. Before using this equipment in a medical environment, always seek the advice of a qualified 
medical expert.
The LCD screen is made of glass and may break if dropped.
Please take special care when handling a damaged Display screen, as the liquid crystals may be harmful to 
your health.
Do not cover the ventilation holes on the equipment.
Please ensure you read this 

Installation and Programming Guide

 carefully before using the equipment.

WARRANTY INFORMATION

2 Save Energy Limited

 guarantees that the 

OWL +USB

 will work for a minimum period of 12 months 

from date of purchase and that it will be free from defects in materials, workmanship or design. If during 
this limited 1 year period of guarantee, from date of purchase, you find that the equipment is not working 
properly, you may return it to us and we will replace, or, (at our discretion) repair it, free of charge.

2 Save Energy Limited

 will not accept any liability for defects arising from fair wear and tear, accidental 

or wilful damage, misuse or failure to follow product or safety instructions.

If you return any equipment as faulty, 

2 Save Energy Limited

 reserves the right to test the 

equipment and if found to be in perfect working order, to return it to you. In this event, 

2 Save Energy 

Limited

 reserves the right to charge for any testing or postage costs incurred. This does not affect your 

legal rights relating to equipment, which is faulty.

Warranty conditions only apply where Proof of Purchase is provided.

To return your 

OWL +USB

 contact 

[email protected]

 to report the issue and reason for 

returning your product. 

2 Save Energy Limited 

will issue you a form and reference number. Once we have 

received the completed form and proof of purchase we will commence the returns process.

COMPLIANCE

The CE marking certifies that this product meets the main requirements of the European Parliament and 
Council Directive 1999/5/EC. A copy of the signed and dated Declaration of Conformity is available on 
request.

Your 

OWL +USB

 is manufactured under an ISO 9001 Quality Management System.

2 Save Energy Limited

The Annexe, Field House Barn, Chineham Lane, Sherbourne St John, Basingstoke, Hants RG24 9LR

Tel: +44 1256 383 431 

[email protected]

Readings appear low

Sensor not closed properly

1. Press the 

RESET

 button on the

back of Sender Unit (The end
of a paperclip is ok for this)

2. Press and hold the green

CHECK

 button on the Sender

until the RED light starts to flash

3. Press and hold the 

SET

 & 

RESET

buttons of the Monitor at the
same time (Use end of paperclip).

4. Release the 

RESET

 button and

a tone should be heard. 
All the segments should appear 
on the Display.

5. On hearing a second tone the  

 

SET

 button can be released. 

The signal indicator will flash 
meaning that the display is 
searching for the Sender, and
will be fully illuminated when it
has synchronised to the Monitor. 

6. A “0” should now be displayed in 

the middle of the screen.

Please Note:

If you are concerned or confused by the installation process please call customer

services on 

01256 383 431

 or email 

[email protected]

Synchronisation fails 
in

STEP 2

ADDITIONAL INFORMATION

Although the sensor clip maybe 
closed, if it is a tight fit then the core 
may not close properly. Check the 
diameter of your cable (up to 10mm 
cable for standard sensors and 
17mm for large sensor). 
Reposition the clip on a straight 
piece of cable.

In the unlikely event that 
synchronising fails you will need 
to reset your 

OWL

 back to factory 

settings and clear the unit’s memory 
by following these instructions:

USB RATING             

5Vdc    

50mA

OWL Rechargeable Alkaline Batteries

 can be used to operate your OWL Wireless Electricity Monitor.  

Please note the OWL Rechargeable Alkaline Batteries need to be charged using a separate charger 
as the OWL Wireless Electricity Monitor does not have an in-built charging circuit.

If 

OWL+USB

 is used in a manner not specified by 2 Save Energy Ltd, the protection provided by the 

equipment may be impaired.

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