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The Cobra line of quality
products includes:
CB Radios
microTALK®Radios
Radar/Laser Detectors
Safety Alert®TrafficWarning Systems
Handheld GPS Receivers
Mobile GPS Navigation Systems
HighGear®Accessories
CobraMarine
Power Inverters
Accessories
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™
VHF Radios
For more information or to
order any of our products,
please visit our website:
®
www.cobra.com
English
800 WATT POWER INVERTER
CPI 850
Nothingcomes close to aCobra
®
Operating Instructions
Printed in China
Part No. 480-198-P
Version A
English
Introduction
Our Thanks to You
Thank you for purchasing the Cobra CPI 850
inverter.Properly used, this Cobra product will give
you many years of reliable service.
HowYour Cobra Power Inverter Works
The Cobra power inverter is an electronic product that
has been designed and built to take low voltage DC (Direct
Current) power from your automobile or other low voltage
power supplies and convert it to standard 115 Volt AC
(Alternating Current) power like the current you have in
your home. This conversion process thereby allows you
to use many of your household appliances and electronic
products in automobiles, RVs, boats, tractors, trucks and
virtually anywhere else.
Customer Assistance
Customer Assistance
Should you encounter any problems with this product,
or not understand its many features, please refer to this
owner’s manual. If you require further assistance after
reading this manual, Cobra Electronics offers the
following customer assistance services:
For Assistance in the U.S.A.
Automated Help Desk English only.
24 hours a day, 7 days a week 773-889-3087 (phone).
Customer Assistance Operators English and Spanish.
8:00 a.m. to 6:00 p.m. CT, Monday through Friday
(except holidays) 773-889-3087 (phone).
Questions English and Spanish.
Faxes can be received at 773-622-2269 (fax).
Technical Assistance English only.
www.cobra.com (on-line: Frequently Asked Questions).
English and Spanish. productinfo
@cobra.com (e-mail).
For Assistance Outside the U.S.A.
Contact Your Local Dealer
©2005 Cobra®Electronics Corporation
6500 West Cortland Street
A1
English
Chicago, Illinois 60707 USA
www.cobra.com
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Introduction Introduction
Product Features
Contents
Features
• Two AC Receptacles
• Automatic Thermal
Protection/Shutdown
AC Outlets
Cooling Fan
• Reverse Polarity Protection
• Low Battery Alarm
• Low Battery Shutdown
Protection &
Power Indicators
Positive Battery
Cable Terminal
(Red)
On/Off
Power Switch
Negative Battery
Cable Terminal
(Black)
Introduction
Our Thanks to You . . . . . . . . . . . . . . . . . . A1
Customer Assistance . . . . . . . . . . . . . . . . A1
Product Features . . . . . . . . . . . . . . . . . . . A2
Important Safety Information . . . . . . . . . . . 1
Quick Evaluation Before Installation . . . . . . 3
Installation
Installation Requirements . . . . . . . . . . . . . . 5
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Connecting Cables . . . . . . . . . . . . . . . . . . . 7
Power Consumption . . . . . . . . . . . . . . . . . 10
Operation
Turning Your Inverter On or Off . . . . . . . . 11
Power and Protection Indicators . . . . . . . 12
Operating Limits . . . . . . . . . . . . . . . . . . . . 13
Troubleshooting Guide . . . . . . . . . . . . . . . 14
Specifications . . . . . . . . . . . . . . . . . . . . . . 15
Warranty
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Customer Assistance
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 17
Product Service . . . . . . . . . . . . . . . . . . . . 17
Accessories and Order Form . . . . . . . . . . 18
A2
English
A3
English
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Introduction
Important Safety Information
Important Safety Information
•
Before installing and using your Cobra power inverter,
please read these general precautions and warnings.
Caution and Warning Statements
To make the most of this inverter, it must be installed and
used properly. Please read the installation and operating
instructions carefully before installing and using it. Special
attention must be paid to the CAUTION and WARNING
statements in the manual.
CAUTION Statements specify conditions which
could cause damageto the unit or other equipment.
WARNING Statements identify conditions that
could result in personal injury or loss of life.
General Precautions
1. Never install the inverter in a boat’s
engine compartmentwhere gas and
battery fumes are present.
2. Do not operate the inverter if it has
been dropped or damaged in any way.
3. Do not open the inverter; it contains no userserviceable parts. Attempting to service unit
could cause electrical shock.
NOTE Internal components remain charged
after all power is disconnected.
4. Do not expose the inverter to rain, snow,
bilge water or spray.
5. Do not obstruct the ventilation openings.
6. Do not install the inverter in zero-clearance
compartment.
CAUTION This inverter should be used in
negative ground applications only.
Nothing comes close to a Cobra
®
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Introduction
Important Safety Information
WARNING Power inverters contain components
that can produce arcs or sparks. To prevent fire
or explosion, do not install the inverter in areas or
compartments containing batteries or flammable
materials or in locations that require ignitionprotected equipment.
WARNING To reduce the risk of fire, do not cover
or obstruct the ventilation openings. Do not install
inverter in zero-clearance compartment.
Warning:Wash Hands After Handling Power Cord
The power cord on this product contains lead, a chemical
known in the state of California to cause birth defects or
other reproductive harm.
Caution: Rechargeable Appliances
Certain chargers for small nickel cadmium batteries can be
damaged if connected to the Cobra 800 watt inverter. Two
Plug In Directly
particular types of equipment are prone to this problem:
1. Small battery-operated
appliances such as flashlights,
razors, and night lights that
Dangerous Voltages
can be plugged directly into
an AC receptacle to recharge.
2. Certain battery chargers for
battery packs used in hand
power tools. These chargers
have a WARNING label stating
that dangerous voltages are
present at the battery terminals.
This problem does not occur with the vast majority of
battery operated equipment. Most use a separate charger
or transformer that is plugged into the AC receptacle and
produces a low voltage output. If the label on the AC
adapter or charger states that it produces a low voltage
AC or DC output (less than 30 volts), the inverter will
have no problem powering the adapter safely.
English
2
Introduction
Power Supply
Cable
Test Load
Quick Evaluation
Before Installation
Nothing comes close to a Cobra
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Quick Evaluation
ntroduction
I
Cobra 800Watt OutputWaveform
Some very sensitive electronic equipment may not operate
On/Off Switchto Off
satisfactory on “square wave” or “modified sine wave.”
The output waveform is referred to as “square wave” or
“modified sine wave.” It is a stepped waveform designed
to have characteristics similar to the sine wave shape of
utility power. A waveform of this nature is suitable for most
ConnectTerminals
AC loads (including linear and switching power suppliers
used in electronic equipment, transformers and motors).
Quick Evaluation Before Installation
Connect Power Source
•
This section provides you with basic information about the
inverter and how to check its performance before installation.
Be Sure to Have on Hand:
A 12 volt DC power source (such as a vehicle battery).
On/Off Switchto On
Connect Test Load
The provided two foot direct-to-battery 12 gauge cable.
Before Installation
The power source must provide
between 11 and 15 volts DC and
be able to supply enough current to
run the test load. As a rough guide,
divide the wattage of the test load by
10 to get the current (in amperes)
the power source must deliver.
Only use the cable provided with
your inverter.
Installation
Installation
To check your inverter’s performance before installation:
Requirements
1.Turn the inverter off (see page 11
for details). If the power source
is a DC power supply, switch it
off as well.
2.Connect cables to power input
terminals (see page 7 for details).
3.Connect cables to power source
(see page 7 for details).
4.Check to make sure all
connections are secure.
5.Turn the inverter on. If the
power source is a DC power
supply, switch it on first.
6. Plug in the test load.
The inverter should supply
power to the load. If the inverter
is not working properly, refer to
the troubleshooting guide on
page 14 or power and protection
indicators section on page 12.
A test load that can be plugged into the AC receptacle on
the inverter for short term testing at a low power level.
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Nothing comes close to a Cobra
®
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Installation Installation
Mounting Connecting Cables
Installation Requirements
•
The inverter must be installed in an area that meets
all of the following requirements:
A. Dry
MountingBrackets
Do not place in an area where water can drip
or splash on the inverter.
Mounting
•
To mount your inverter:
1. Place the inverter on a flat surface with the
mounting bracket against the mounting surface.
B. Cool
Ambient air temperature should be between 30°F
and 105°F (0°C and 40°C). The cooler the better.
C. Ventilate
Allow at least one inch (three cm) of clearance around
the inverter for proper airflow. Make sure that ventilation
openings on the ends of the unit are not obstructed.
MountingHardware
D. Safe
Do not install the inverter in the same compartment
as a battery or in any compartment that contains
On/Off Switchto Off
2. Mount to secure surface using mounting hardware
that is corrosion resistant (not included).
flammable liquids such as gasoline.
E. Close to Battery
Install unit as close to battery as possible (without
being in the same compartment) to minimize the
length of cable required to connect the inverter to
the battery. It is better and cheaper to run longer
AC wires than longer DC wires (cables).
CAUTION To avoid fire, do not cover or obstruct
ventilation openings. Do not install inverter in a zero-
The inverter can be mounted horizontally or vertically.
Connect Cables
clearance compartment. Overheating may result.
CAUTION The inverter must only be connected to
batteries with a nominal output voltage of 12 volts.
It will not work with a 6 volt battery, and will be
damaged if it is connected to a 16 volt battery.
which requires ignition protected equipment.
WARNING This unit contains components which
can produce arcs or sparks. To prevent fire or
explosion, do not install in compartments containing
a battery or flammable materials, or in a location
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Nothing comes close to a Cobra
®
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Page 7
Installation Installation
Connecting Cables Connecting Cables
Connecting Cables
•
Power wire and wiring are very important to the
performance of the inverter. Because the inverter has a
low voltage, high current input, low resistance wiring is
essential between the battery and inverter. This is so it
can deliver the maximum amount of energy to the load.
Only use the cables provided with your power inverter.
To connectthe cables between the inverter
and the battery:
1. Turn the On/Off Switch on the inverter to the off
position. If the power source is a DC power supply,
switch it off as well.
Connect Power Source
2. Connect cable to the Power Input Terminals on
right side panel of the inverter. The red terminal is
positive (+) and the black terminal is negative (-).
Insert the ends of the cables onto the terminals and
tighten the screws to clamp the cables safely.
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Nothing comes close to a Cobra
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Installation
Power Consumption
3. Connect cable to the power source:
a. Connect the cable from the Negative (Black)
Terminal of inverter to the Negative Terminal of
the power source. Make a secure connection.
b. Connect the cable from the Positive (Red) Terminal
of the inverter to the Positive Terminal of the power
source (the battery’s main fuse or the battery selector
switch, if you are using one). Makea secure connection.
You mightobserve a spark whenyou make thisconnection
sincecurrent can flow to charge capacitors in the inverter.
All power connections to your Cobra inverter must
be Positive to Positive and Negative to Negative.
CAUTION Do not connect the inverter and another
AC source (such as a generator or utility power)
to the AC wiring at the same time. The inverter
will be damaged if its output is connected to
AC voltage from another source. Damage can
even occur if the inverter is switched off.
Operation
Power On and Off
branch circuit that has high-power consumption loads.
It will not operate electric heaters, air conditioners,
stoves, and other electrical appliancesthat consume
more than 800 watts.
On/Off Switchto On
CAUTION Loose connectors result in excessive
voltage drop and may cause over heated wires
and melted insulation.
On/Off Switchto Off
Laptop
50 watts x 2 hours
= 100 watt-hours
TV/VCR (up to 25")
115 wattsx 3 hours
= 345 watt-hours
CAUTION Do not connect the inverter to an AC
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10
Blender
300 watts x 15 minutes
= 75 watt-hours
Nothing comes close to a Cobra
®
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Power and
Operation
Protection Indicators
CAUTION Reverse polarity connections (positive
to negative) will blow internal fuses in the inverter
and may permanently damage the unit. Such
damage is not covered by the warranty.
CAUTION Remove any jewelry (watch, ring, etc.).
Be careful not to short circuit the battery with
any metallic object (wrench, etc.).
WARNING 115 volt AC power is potentially lethal.
Do not work on AC wiring when it is connected to
the inverter (even if it is switched off) unless the
DC power source is physically disconnected from
the inverter. Also, do not work on AC wiring if it is
connected to another AC power source such as
a generator or the utility line.
WARNING You may observe a spark when making
the connection because current can flow to charge
the capacitors in the inverter. Do not make this
connection in the presence of flammable fumes.
Explosion or fire may result. Thoroughly ventilate the
battery compartment before making this connection.
Operation
Operating Limits
Power Consumption
•
For each piece of equipment you will be operating from the
inverter, you must determine the battery’s reserve capacity
(how long the battery can deliver a specific amount of
current – in automotive batteries, usually 25 amperes) or
ampere-hour capacity (a measure of how many amperes
a battery can deliver for a specified length of time).
Example – Reserve capacity: a battery with a reserve
capacity of 180 minutes can deliver 25 amperes for
180 minutes before it is completely discharged.
Example – Ampere-hour capacity: a battery with
an ampere-hour capacity of 100 ampere-hours can
deliver 5 amperes for 20 hours before it is completely
discharged.
To determine the battery ampere-hour
capacity you require:
1. Determine how many watts each piece of equipment
consumes. This can normally be found on the product
label. If only the current draw is given, multiply the
current draw by 115 to get the watt consumption.
2. Estimate the time (in hours) that each piece of equipment
will be running between battery charging cycles.
3. Calculate the total watt-hours of energy consumption
(power x operating time) using the average power
consumption and the total estimated running time
(in hours). Power x Operating Time = Watt-Hours.
4. Divide the watt-hours by 10 to determine how many
power supply’s (12 volt) ampere-hours will be consumed.
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Nothing comes close to a Cobra
®
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Operation
Troubleshooting Guide
Troubleshooting Guide
Problem/Symptom
•
Low output voltage
No output voltage
No output voltage
after prolongeduse
No output voltage,
“Protect” indicator
Possible Causes
Overload
Low input voltage
Thermal
shutdown
High input
voltage
lighted
No output voltage
No output voltage
Short circuit
Inverter
switched off
No power
to inverter
Reverse
DC polarity
Low battery alarm
Poor DC wiring
on all the time
Poor battery
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condition
Solution
Reduce the load.
Recharge battery.
Check connections
and cable.
Allow inverter
to cool off.
Reduce load,
continuous
operation input
current required.
Improve ventilation;
Makesure ventilation
openings in the
inverter are not
obstructed.
Reduce ambient
temperature.
Make sure
the inverter is
connected to
12V battery.
Check regulation
of charging system.
Check load for
proper operation.
Turn inverter on.
Check wiring
to inverter.
Observe
correct polarity.
Check
connections.
Make sure battery
is fully charged.
Operation
Specifications
Specifications
•
Continuous output power (1 hour) . . . . . . . . . . . . 800W
Surge rating (0.1 second) . . . . . . . . . . . . . . . . . . 1600W
Peak efficiency (12V – 1⁄2 load) . . . . . . . . . . . . . . > 88%
Efficiency (full load, 12V) . . . . . . . . . . . . . . . . . . . > 83%
No load current draw . . . . . . . . . . . . . . . < 0.5A (12.6V)
Output waveform (resistive load) . . . Modified sine wave
Output frequency . . . . . . . . . . . . . . . . . . . . 58HZ – 62HZ
Output voltage . . . . . . . . . . . . . . . . . . . . . . 109V – 120V
Input voltage . . . . . . . . . . . . . . . . . . 10.4VDC – 14.4VDC
Alarm voltage (unload) . . . . . . . . . . . . . . .10.2V – 10.8V
Shutdown voltage (unload) . . . . . . . . . . . . . 9.2V – 9.8V
Operating temperature range . . . . . . . . . . . . 0°C – 40°C
(32°F – 104°F)
Storage temperature range . . . . . . . . . . . . -40°C – 85°C
(-40°F – 185°F)
Protection . . . . . . . . . .Overload, short-circuit, overtemp,
reverse polarity, under/over voltage
Notes
All protection is automatically recovered.
To protect the battery, if the unit needs to be restarted
after low voltage protection, the voltage of DC input
should be above 12V.
To extend the life of the fan, it will stop when there is no
load. The speed of the fan increases as the load increases.
The unit is completely insulated in input and output for
added safety.
Nothing comes close to a Cobra
®
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Warranty and Trademark
Warranty
Limited Two-Year Warranty
•
For Products Purchased in the U.S.A.
Cobra Electronics Corporation warrants that its Cobra power
inverter, and the component parts thereof, will be free of defects in
workmanship and materials for a period of two years from the date
of first consumer purchase. This warranty may be enforced by the
first consumer purchaser, provided that the product is utilized
within the U.S.A.
Cobra will, without charge, repair or replace, at its option, defective
power inverters, products or component parts upon delivery to the
Cobra Factory Service department, accompanied by proof of the
date of first consumer purchase, such as a duplicated copy of a
sales receipt.
You must pay any initial shipping charges required to ship the
product for warranty service, but the return charges will be at
Cobra’s expense, if the product is repaired or replaced under
warranty. This warranty gives you specific legal rights, and you
may also have other rights which may vary from state to state.
Exclusions: This limited warranty does not apply.
1. To any product damaged by accident.
2. In the event of misuse or abuse of the product or
as a result of unauthorized alterations or repairs.
3. If the serial number has been altered, defaced, or removed.
4. If the owner of the product resides outside the U.S.A.
All implied warranties, including warranties of merchantability
and fitness for a particular purpose are limited in duration to the
length of this warranty. Cobra shall not be liable for any incidental,
consequential or other damages; including, without limitation, to
damages resulting from loss of use or cost of installation.
Some states do not allow limitations on how long an implied
warranty lasts and/or do not allow the exclusion or limitation
of incidental or consequential damages; so the above limitations
may not apply to you.
For Products Purchased Outside the U.S.A.
Please contact your local dealer for warranty information.
Trademark Acknowledgement
•
Cobra®, Nothing comes close to a Cobra®and the snake design
are registered trademarks of Cobra Electronics Corporation, USA.
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16
Acknowledgement
Maintenance and
Customer Assistance
Cobra Electronics Corporation™ is a trademark of Cobra
Electronics Corporation, USA.
Product Service
Nothing comes close to a Cobra
®
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