Centech CEN-TECH 92340 User manual

CARBON MONOXIDE METER
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit ourWeb site at http://www.harborfreight.com
Copyright © 2004 by Harbor Freight Tools®. All rights reserved. No portion of
this manual or any artwork contained herein may be reproduced in any shape or
form without the express written consent of Harbor FreightTools.
For technical questions and replacement parts, please call 1-800-444-3353
92340

Page 2SKU 92340 For technical questions, please call 1-800-444-3353
Specifications
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front cover. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING:When using tool, basic safety precautions should always be followed to re-
duce the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use battery powered tools in damp or wet
locations. Don’texposetorain. Keepwork areawelllighted. Do notuse batterypowered
tools in the presence of flammable gases or liquids.
3. Keep children away. Children must never be allowed in the work area. Do not let them
handle the Carbon Monoxide Meter.
4. Store idle equipment. When not in use, the Carbon Monoxide Meter must be stored in
a dry location. Always lock up the Carbon Monoxide Meter and keep it out of reach of
children.
5. Use the right tool for the job.Do notattempt toforceasmalltoolor attachmenttodo the
work of a larger industrial tool. There are certain applications for which this tool was
designed.It willdo thejob betterand more safely at therate forwhich itwas intended.Do
not modify this tool and do not use this tool for a purpose for which it was not intended.
6. Dress properly. Protective, electrically nonconductive clothes and nonskid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
7. Use eye protection. Always wear ANSI approved impact safety goggles.
8. Maintain tools with care. Keep the Carbon Monoxide Meter clean for better and safer
performance.The unit must be kept clean, dry, and free from oil and grease at all times.
9 . Disconnect power.Turn off the power switch when not in use. When not in use for over
a week, remove the battery to save power.
MeasurementRange 0-1000PPM (Parts PerMillion)
MeasurementResolution 1 PPM
Accuracy 5% + or - 10 PPM
Warm-upPeriod LessThan 2 Seconds
PowerSource 9VoltBattery (included)
OverallDimensions 2-1/2”W x 6-3/8” L x 1-3/8”Thick
Weight 1/2Lb.
Features: Auto Power Off after 15 min.of no activity, Audible Alarm
begins at 35 PPM and continues beeping until 200 PPM, Continuous
tone after 200 PPM, Max. Hold and Data Hold feature.
REV 11/04

Page 3SKU 92340 For technical questions, please call 1-800-444-3353
10. Stay alert. Watch whatyouaredoing,use commonsense.Do notoperate anytool when
you are tired.
11. Check for damaged parts. Beforeusing anytool,anypartthatappearsdamaged should
be carefully checked to determine that it will operate properly and perform its intended
function.Check for alignmentand binding ofmoving parts;any brokenparts or mounting
fixtures;and anyotherconditionthatmayaffectproperoperation.Anypartthatisdamaged
should be properly repaired or replaced by a qualified technician. Do not use the tool if
any switch does not turn On and Off properly.
12. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
13. Do not operate tool if under the influence of alcohol or drugs. Read warning labels
if taking prescription medicine to determine if your judgment or reflexes are impaired
while taking drugs. If there is any doubt, do not operate the tool.
14. Maintenance. For your safety, service and maintenance should be performed regularly
by a qualified technician. The batteries must be changed regularly.
This is not a personal safety device. This Carbon Monoxide Meter is not
designed to take the place of a home Carbon Monoxide detector.
Warning:The warnings,cautions,and instructions discussed in this instruction manual
cannot cover all possible conditions and situations that may occur. It must be under-
stood by the operator that common sense and caution are factors which cannot be
built into this product,but must be supplied by the operator.
Operation
Refer to the Assembly Drawings on page 6.
Battery Replacement
Note: If the battery becomes weak, the LCD will display the following:
1. Remove the Protective Cover.
2. Use a screwdriver(notincluded) toremovethe screwon thelowerportionof thebattery
compartment.
3. Take out the old battery and replace it with a new 9Volt battery. Make sure the battery
polarity marks (+ and -) match up with those in the battery compartment.
4. Replace the back cover and secure it with the screw. Replace the protective case.
Unpacking
When unpacking, check to make sure the parts shown on page 6 are included. If any
partsare missingor broken,please callHarbor FreightTools atthe number on the cover of this
manual as soon as possible.

Page 4SKU 92340 For technical questions, please call 1-800-444-3353
Note: When operating the unit, make sure the Sensor on the back of the unit is free and clear
of any obstructions.
Operating the Carbon Monoxide Meter
1. Press the On/Off button to activate the unit and it will begin measuring as you carry it,
while walking around the test area. The results will be displayed on the LCD in PPM
(Parts Per Million).
2. When finished, press the On/Off button to turn off the unit.
Note: For use in dark environments, the LCD will light up. Press the Back Light button (see
page 6) to turn on the light, and press it again to turn it off.
Special Features:
1. To freeze the Carbon Monoxide Meter at a specific reference for later use, press the
HOLD button. The word HOLD will appear on the LCD along with the saved measure-
ment. To return to normal operation, press the HOLD button again.
2. If you want to keep track of the highest reading you take, press the MAX button. The
LCD readout will not change as the unit takes in new readings. It will only show the
highest reading encountered since you pressed the MAX button. To return it to normal
operation, press the MAX button again.
Operation (continued)
Important Carbon Monoxide Information
Carbon monoxide is DEADLY in a closed environment. Early signs of
Carbon Monoxide poisoning resemble the flu, with headaches, dizziness,
or nausea.If you have any of these signs,GET FRESH AIR IMMEDIATELY,
whether the meter has a high reading or not.
Carbon Monoxide (CO), a colorless, odorless gas, is produced in dangerous levels
from internal combustion engines (in enclosed areas) such as automobiles, lawnmowers, and
any other small engine appliance. Gas, oil, and kerosene appliances that are not properly
maintained will also produce this deadly gas. In the house, plugged chimneys, dirty flues, gas
heaters,fireplaces, and furnacesare alsocapableof producingquantities of this silent killer. If
high readings are found, immediately open a window and ventilate the room, if possible shut
off the appliance, evacuate the area, and call your gas supplier or a qualified technician for
analysis of the problem and service.
US Department of Labor, Occupational Safety & Health Administration (OSHA) regula-
tion 1917.24: The CO content in any enclosed space shall be maintained at not more than 50
PPM (0.005%). Remove employees from enclosed space if the CO concentration exceeds
100 PPM (0.01%).

Page 5SKU 92340 For technical questions, please call 1-800-444-3353
Important Carbon Monoxide Information (continued)
Selected problems and the fuels and appliances that cause them.
WARNING: These problems should only be diagnosed and remedied only
by a qualified technician. Carbon Monoxide is very hazardous,
and fuels are explosive. Proper,safe,professional maintenance
techniques are essential to reduce the risk of FIRE, EXPLOSION,
and exposure to Carbon Monoxide, which may cause DEATH.
Stove and Fireplaces that burn gas, wood, and coal produce to much Car-
bon Monoxide if these problems are present:
1. Cracked firebox.
2. Cracked Heat Exchanger.
3. Green or treated wood.
4. Defective/Blocked flue.
5. Insufficient air.
Ranges and Ovens that burn natural gas or LPG (Liquefied Petroleum Gas)
produce too much Carbon Monoxide if these problems are present:
1. Improper venting.
2. Misused as a heater.
3. Maladjusted burner.
4 Insufficientair.
Water heaters that burn natural gas or LPG produce too much Carbon
Monoxide if these problems are present:
1. Insufficient air.
2. Blocked/defective flue.
3. Maladjusted burner.
Room/Central Heaters that burn kerosene produce too much Carbon Mon-
oxide if these problems are present:
1. Improper venting.
2. Insufficient air.
3. Wrong wick or wick height.
4. Wrong fuel. (Only use K-1 fuel.)
5. Improperadjustment.
Central Heating Furnaces that burn coal and kerosene produce too much
Carbon Monoxide if these problems are present:
1. Cracked Heat Exchanger.
2. Insufficient air.
3. Defective grate.
Gas Furnaces and room heaters that burn natural gas, LPG, or oil produce
too much Carbon Monoxide if these problems are present:
1. Cracked Heat Exchanger.
2. Insufficient air.
3. Blocked/defective flue.
4. Maladjusted burner.

Page 6SKU 92340 For technical questions, please call 1-800-444-3353
NOTE:Some parts are listed and shown for illustration purposes only and are not available indi-
vidually as replacement parts.
Assembly Drawings
LCD
MAX Hold Button
DATAHoldButton
On/Off Button
CarbonMonoxideSensor
ProtectiveCase
(Battery Compartment
hidden from view
underneath)
Back Light Button
FRONT
BACK
Maintenance
1. After each use, wipe the unit down with a lint free cloth.
2. Keep the Sensor clear of all foreign debris.
3. Do not allow the unit to freeze, or to sit in direct sunlight for extended periods.
No replacement parts available for this unit.
PLEASE READTHE FOLLOWING CAREFULLY
THEMANUFACTURERAND/ORDISTRIBUTORHAS PROVIDEDTHEPARTSDIAGRAMINTHIS
MANUALASAREFERENCETOOLONLY. NEITHERTHEMANUFACTURERNORDISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KINDTOTHE BUYERTHAT HE OR
SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER
AND/ORDISTRIBUTOREXPRESSLYSTATESTHATALLREPAIRSANDPARTSREPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECHNICIANS AND NOT BYTHE
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING
OUTOF HISOR HER INSTALLATIONOF REPLACEMENTPARTSTHERETO.