Cobra CPI 850 User manual

Customer Assistance
A1 English
Our Thanks to You
Introduction
Thank you for purchasing the Cobra CPI 850
inverter. Properly used, this Cobra product will give
you many years of reliable service.
How Your 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
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 riday
(except holidays) 773-889-3087 (phone).
Questions English and Spanish.
axes can be received at 773-622-2269 (fax).
echnical Assistance English only.
www.cobra.com (on-line: requently Asked Questions).
English and Spanish. [e-mail] (e-mail).
For Assistance Outside the U.S.A.
Contact Your Local Dealer
©2005 Cobra®Elec ronics Corpora ion
6500 Wes Cor land S ree
Chicago, Illinois 60707 USA
www.cobra.com
Operating Instructions
Nothing comes close to a Cobra®English
800 WATT POWER INVERTER
CPI 850
Printed in China
Part No. 480-198-P
Version A
Nothing comes close to a Cobra®English
or more information or to
order any of our products,
please visit our website:
www.cobra.com
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Accessories
The Cobra line of quality
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Cooling Fan
A3 English
A2 English
Product Features
Introduction Introduction
On/Off
Power Switch
AC Outlets
Negative Battery
Cable Terminal
(Black)
Positive Battery
Cable Terminal
(Red)
Features
•wo AC Receptacles
•Automatic hermal
Protection/Shutdown
•Reverse Polarity Protection
•Low Battery Alarm
•Low Battery Shutdown
Contents
Introduction
Our Thanks to You . . . . . . . . . . . . . . . . . . A1
Customer Assistance . . . . . . . . . . . . . . . . A1
Product eatures . . . . . . . . . . . . . . . . . . . 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
OperatingLimits ....................13
Troubleshooting Guide . . . . . . . . . . . . . . . 14
Specifications ......................15
Warranty
Warranty..........................16
Customer Assistance
Maintenance .......................17
ProductService ....................17
Accessories and Order orm . . . . . . . . . . 18
Protection &
Power Indicators

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Introduction Important Safety Information
Im ortant 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 CAU ION and WARNING
statements in the manual.
CAU ION Statements specify conditions which
could cause damage to 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 compartment where 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 user-
serviceable parts. Attempting to service unit
could cause electrical shock.
NO E 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.
CAU ION This inverter should be used in
negative ground applications only.

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Important Safety Information
Introduction
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 ignition-
protected 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
particular types of equipment are prone to this problem:
1. Small battery-operated
appliances such as flashlights,
razors, and night lights that
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.
Quick Evaluation
Before Installation
Introduction
Plug In Directly
Dangerous Voltages
Power Supply
Cable
Test Load

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Installation
Requirements
Cobra 800 Watt Output Waveform
Some very sensitive electronic equipment may not operate
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
AC loads (including linear and switching power suppliers
used in electronic equipment, transformers and motors).
Quick Evaluation Before Installation
•
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).
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.
The provided two foot direct-to-battery 12 gauge cable.
Only use the cable provided with
your inverter.
A test load that can be plugged into the AC receptacle on
the inverter for short term testing at a low power level.
o check your inverter’s performance before installation:
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.
Installation
Quick Evaluation
Before Installation
Introduction
On/Off Switch to Off
Connect Terminals
Connect Power Source
On/Off Switch to On
Connect Test Load

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Installation Requirements
•
The inverter must be installed in an area that meets
all of the following requirements:
A. Dry
Do not place in an area where water can drip
or splash on the inverter.
B. Cool
Ambient air temperature should be between 30°
and 105° (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.
D. Safe
Do not install the inverter in the same compartment
as a battery or in any compartment that contains
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).
CAU ION To avoid fire, do not cover or obstruct
ventilation openings. Do not install inverter in a zero-
clearance compartment. Overheating may result.
CAU ION 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.
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
which requires ignition protected equipment.
Mounting
•
o mount your inverter:
1. Place the inverter on a flat surface with the
mounting bracket against the mounting surface.
2. Mount to secure surface using mounting hardware
that is corrosion resistant (not included).
The inverter can be mounted horizontally or vertically.
ounting Connecting Cables
Installation Installation
On/Off Switch to Off
ounting Brackets
ounting Hardware
Connect Cables

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Connecting Cables Connecting Cables
Installation Installation
Connect Power Source
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.
o connect the 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.
2. Connect cable to the Power Input erminals 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.

3. Connect cable to the power source:
a. Connect the cable from the Negative (Black)
erminal of inverter to the Negative erminal of
the power source. Make a secure connection.
b. Connect the cable from the Positive (Red) erminal
of the inverter to the Positive erminal of the power
source (the battery’s main fuse or the battery selector
switch, if you are using one). Make a secure connection.
You might observe a spark when you make this connection
since current can flow to charge capacitors in the inverter.
All power connections to your Cobra inverter must
be Positive to Positive and Negative to Negative.
CAU ION 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.
CAU ION Do not connect the inverter to an AC
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branch circuit that has high-power consumption loads.
It will not operate electric heaters, air conditioners,
stoves, and other electrical appliances that consume
more than 800 watts.
CAU ION Loose connectors result in excessive
voltage drop and may cause over heated wires
and melted insulation.
Power Consumption
Installation Power On and Off Operation
Laptop
50 watts x 2 hours
= 100 watt-hours
TV/VCR (up to 25")
115 watts x 3 hours
= 345 watt-hours
Blender
300 watts x 15 minutes
= 75 watt-hours
On/Off Switch to On
On/Off Switch to Off

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CAU ION 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.
CAU ION 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.
Power and
Protection Indicators
Operation Operating Limits Operation
Power Consum tion
•
or 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.
o 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 ime = 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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Troubleshooting Guide
Operation Specifications Operation
S ecifications
•
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° – 104° )
Storage temperature range . . . . . . . . . . . . -40°C – 85°C
(-40° – 185° )
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.
Problem/Symptom
Low output voltage
No output voltage
No output voltage
after prolonged use
No output voltage,
“Protect” indicator
lighted
No output voltage
No output voltage
Low battery alarm
on all the time
Possible Causes
Overload
Low input voltage
Thermal
shutdown
High input
voltage
Short circuit
Inverter
switched off
No power
to inverter
Reverse
DC polarity
Poor DC wiring
Poor battery
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;
Make sure 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.
Troubleshooting Guide
•

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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 actory 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.
Cobra Electronics Corporation™ is a trademark of Cobra
Electronics Corporation, USA.
Warranty and Trademark
Acknowledgement
Warranty
aintenance and
Product Service
Customer Assistance