Bacharach IEQ Chek User manual

Indoor Environment Quality Monitor
Instruction 1509-9001
Operation Manual
Rev. 1 - July 2011
Product Leadership •Training •Service •Reliability

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IMPORTANT NOTE
READ AND UNDERSTAND THIS MANUAL PRIOR TO USING THIS INSTRUMENT.
CAREFULLY READ THE WARRANTY POLICY, SERVICE POLICY, NOTICES,
DISCLAIMERS AND REVISIONS ON THE FOLLOWING PAGES.
THIS INSTRUMENT SHOULD BE INSPECTED AND CALIBRATED REGULARLY BY
A QUALIFIED AND TRAINED TECHNICIAN.
THIS INSTRUMENT HAS NOT BEEN DESIGNED TO BE INTRINSICALLY SAFE IN
HAZARDOUS OR EXPLOSION-RATED ENVIRONMENTS. FOR YOUR SAFETY,
DO NOT USE IT IN AREAS CLASSIFIED AS HAZARDOUS AREAS (E.G.,
EXPLOSION-RATED ENVIRONMENTS).
INSTRUMENT SERIAL NUMBER:
PURCHASE DATE:
PURCHASED FROM:
WARRANTY POLICY
BACHARACH, INC. WARRANTS THIS INSTRUMENT, EXCLUDING SENSORS, TO BE
FREE FROM DEFECTS IN MATERIALS AND WORKMANSHIP FOR A PERIOD OF TWO
YEARS FROM THE DATE OF PURCHASE BY THE ORIGINAL OWNER. THE SENSORS
HAVE A WARRANTY PERIOD OF ONE YEAR FROM THE DATE OF PURCHASE. IF
THE PRODUCT SHOULD BECOME DEFECTIVE WITHIN THIS WARRANTY PERIOD,
WE WILL REPAIR OR REPLACE IT AT OUR DISCRETION.
THE WARRANTY STATUS MAY BE AFFECTED IF THE INSTRUMENT HAS NOT BEEN
USED AND MAINTAINED PER THE INSTRUCTIONS IN THIS MANUAL OR HAS BEEN
ABUSED, DAMAGED, OR MODIFIED IN ANY WAY. THIS INSTRUMENT IS ONLY TO BE
USED FOR PURPOSES STATED HEREIN. THE MANUFACTURER IS NOT LIABLE FOR
AUXILIARY INTERFACED EQUIPMENT OR CONSEQUENTIAL DAMAGE.
DUE TO ONGOING RESEARCH, DEVELOPMENT, AND PRODUCT TESTING, THE
MANUFACTURER RESERVES THE RIGHT TO CHANGE SPECIFICATIONS WITHOUT
NOTICE. THE INFORMATION CONTAINED HEREIN IS BASED ON DATA CONSIDERED
ACCURATE. HOWEVER, NO WARRANTY IS EXPRESSED OR IMPLIED REGARDING
THE ACCURACY OF THIS DATA.
ALL GOODS MUST BE SHIPPED TO THE MANUFACTURER BY PREPAID FREIGHT.
ALL RETURNED GOODS MUST BE PRE-AUTHORIZED BY OBTAINING A RETURN
MERCHANDISE AUTHORIZATION (RMA) NUMBER. CONTACT THE MANUFACTURER
FOR A NUMBER AND PROCEDURES REQUIRED FOR PRODUCT TRANSPORT.

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SERVICE POLICY
BACHARACH, INC. MAINTAINS AN INSTRUMENT SERVICE FACILITY AT THE
FACTORY. SOME BACHARACH DISTRIBUTORS / AGENTS MAY ALSO HAVE
REPAIR FACILITIES, HOWEVER, BACHARACH ASSUMES NO LIABILITY FOR
SERVICE PERFORMED BY ANYONE OTHER THAN BACHARACH PERSONNEL.
REPAIRS ARE WARRANTED FOR 90 DAYS AFTER DATE OF SHIPMENT
(SENSORS, PUMPS, FILTERS AND BATTERIES HAVE INDIVIDUAL
WARRANTIES). SHOULD YOUR INSTRUMENT REQUIRE NON-WARRANTY
REPAIR, YOU MAY CONTACT THE DISTRIBUTOR FROM WHOM IT WAS
PURCHASED OR YOU MAY CONTACT BACHARACH DIRECTLY.
IF BACHARACH IS TO DO THE REPAIR WORK, SEND THE INSTRUMENT,
PREPAID, TO BACHARACH, INC. AT THE FOLLOWING ADDRESS.
BACHARACH, INC.
621 HUNT VALLEY CIRCLE
NEW KENSINGTON, PA 15068
ATTENTION: SERVICE DEPARTMENT
ALWAYS INCLUDE YOUR RMA #, ADDRESS, TELEPHONE NUMBER, CONTACT
NAME, SHIPPING/BILLING INFORMATION AND A DESCRIPTION OF THE
DEFECT AS YOU PERCEIVE IT. YOU WILL BE CONTACTED WITH A COST
ESTIMATE FOR EXPECTED REPAIRS PRIOR TO THE PERFORMANCE OF ANY
SERVICE WORK. FOR LIABILITY REASONS, BACHARACH HAS A POLICY OF
PERFORMING ALL NEEDED REPAIRS TO RESTORE THE INSTRUMENT TO
FULL OPERATING CONDITION.
PRIOR TO SHIPPING EQUIPMENT TO BACHARACH, CONTACT OUR OFFICE
FOR AN RMA # (RETURNED MERCHANDISE AUTHORIZATION). ALL RETURNED
GOODS MUST BE ACCOMPANIED WITH AN RMA NUMBER.
PACK THE EQUIPMENT WELL (IN ITS ORIGINAL PACKING IF POSSIBLE), AS
BACHARACH CANNOT BE HELD RESPONSIBLE FOR ANY DAMAGE INCURRED
DURING SHIPPING TO OUR FACILITY.
NOTICES
COPYRIGHTS: THIS MANUAL IS SUBJECT TO COPYRIGHT PROTECTION; ALL
RIGHTS ARE RESERVED UNDER INTERNATIONAL AND DOMESTIC
COPYRIGHT LAWS. THIS MANUAL MAY NOT BE COPIED OR TRANSLATED, IN
WHOLE OR IN PART, IN ANY MANNER OR FORMAT, WITHOUT THE WRITTEN
PERMISSION OF BACHARACH, INC.
ALL SOFTWARE WHICH BACHARACH UTILIZES AND/OR DISTRIBUTES, HOLDS
A PROPRIETARY INTEREST AND IS ALSO SUBJECT TO COPYRIGHT
PROTECTION AND ALL RIGHTS ARE RESERVED. NO PARTY MAY USE OR
COPY SUCH SOFTWARE IN ANY MANNER OR FORMAT, EXCEPT TO THE
EXTENT THAT BACHARACH GRANTS THEM A LICENSE TO DO SO. IF THIS
SOFTWARE IS BEING LOADED ONTO MORE THAN ONE COMPUTER, EXTRA
SOFTWARE LICENSES MUST BE PURCHASED.

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DISCLAIMER
UNDER NO CIRCUMSTANCES WILL BACHARACH, INC. BE LIABLE FOR ANY
CLAIMS, LOSSES, OR DAMAGES RESULTING FROM OR ARISING OUT OF THE
REPAIR OR MODIFICATION OF THIS EQUIPMENT BY A PARTY OTHER THAN
BACHARACH SERVICE TECHNICIANS, OR BY OPERATION OR USE OF THE
EQUIPMENT OTHER THAN IN ACCORDANCE WITH THE PRINTED
INSTRUCTIONS CONTAINED WITHIN THIS MANUAL OR IF THE EQUIPMENT
HAS BEEN IMPROPERLY MAINTAINED OR SUBJECTED TO NEGLECT OR
ACCIDENT. ANY OF THE FORGOING WILL VOID THE WARRANTY.
REVISIONS
BACHARACH, INC. MAKES NO WARRANTY OR REPRESENTATION,
EXPRESSED OR IMPLIED INCLUDING ANY WARRANTY OF MERCHANTABILITY
OR FITNESS FOR PURPOSE, WITH RESPECT TO THIS MANUAL. ALL
INFORMATION CONTAINED IN THIS MANUAL IS BELIEVED TO BE TRUE AND
ACCURATE AT THE TIME OF PRINTING. HOWEVER, BACHARACH RESERVES
THE RIGHT TO MAKE CHANGES AT ANY TIME WITHOUT NOTICE. REVISED
COPIES OF THIS MANUAL CAN BE OBTAINED BY CONTACTING BACHARACH,
INC.
SHOULD YOU DETECT ANY ERRORS OR OMISSIONS IN THIS MANUAL,
PLEASE CONTACT THE COMPANY AT THE FOLLOWING ADDRESS.
BACHARACH, INC.
621 HUNT VALLEY CIRCLE
NEW KENSINGTON, PA 15068-7074
USA
TOLL FREE: 1-800-736-4666
FAX: [phone]
E-MAIL: [e-mail]
WEBSITE: www.MyBacharach.com
IN NO EVENT WILL BACHARACH, INC., OR ITS OFFICERS OR EMPLOYEES BE
LIABLE FOR ANY DIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES RESULTING FROM ANY DEFECT IN ANY MANUAL, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGES.

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TABLE OF CONTENTS
1. OVERVIEW................................................................................................................ 1
1.1. General Description ............................................................................................ 1
1.2. IEQ Chek™ Shipping Checklist .......................................................................... 2
1.3. Key Features ...................................................................................................... 2
1.4. Sensor Configuration Notes ................................................................................ 2
2SPECIFICATIONS ..................................................................................................... 3
2.1. General............................................................................................................... 3
2.2. IQ Chek™ DataLogging Software (Optional)....................................................... 5
2.3. Available “Plug-and-Play” Sensors...................................................................... 5
3. KEY COMPONENTS.................................................................................................. 6
3.1. Key Components: Front and Bottom Views......................................................... 6
3.2. Key Components: Left Side View........................................................................ 7
3.3. Key Components: Top and Back Views .............................................................. 8
4. INSTRUMENT OPERATION ...................................................................................... 9
4.1. General............................................................................................................... 9
4.2. Switching the Instrument On/Off ........................................................................10
4.3. Battery and Battery Warnings ............................................................................10
4.4. Main Menu Functional Overview........................................................................11
5. MENU FUNCTION DETAILS ................................................................................... 12
5.1. Calibrate Menu ..................................................................................................12
5.2. Settings Menu....................................................................................................13
5.3. Datalog Menu ....................................................................................................15
5.4. Alarm Menu .......................................................................................................17
5.5. Info Menu ..........................................................................................................18
5.6. USB Menu .........................................................................................................19
6. CALIBRATION......................................................................................................... 19
6.1. Overview ...........................................................................................................19
6.2. Requirements and Cautions...............................................................................19
6.3. Calibration Process: Zero .................................................................................20
6.4. Calibration Process: 3-Point Span ....................................................................20
6.5. Calibration Process: 1-Point Span ....................................................................21
7. ADDING OR CHANGING PLUG-AND-PLAY SENSORS......................................... 22
8. MAINTENANCE ....................................................................................................... 25
9. IEQ CHEKTROUBLESHOOTING........................................................................ 25
10. ACCESSORIES ....................................................................................................... 26
10.1. Hard Shell, Foam-Lined Carrying/Transport Case............................................26
10.2. Extended Operation (Short Term) External Battery ..........................................26
10.3. Extended Operation (Long Term) External Battery...........................................26
10.4. Standard Gas Sample Probe ...........................................................................26
10.5. IQ ChekDataLogging Kit...............................................................................26

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11. DUAL PROBE VERSION......................................................................................... 27
11.1. Applications Overview......................................................................................27
11.2. Probes .............................................................................................................28
11.3. Instrument Kits for Dual-Probe Applications .....................................................29
11.4. Application Setup and Configuration ................................................................30
12. MENU ARCHITECTURE .......................................................................................... 31

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IEQ Chek  Operation Manual
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1. OVERVIEW
1.1. General Description
Thank you for purchasing the IEQ Chek™ indoor environmental quality monitor. The
IEQ Chek™ is an easy-to-use, portable, information-recording device for monitoring
trends that pertain to indoor air quality.
The IEQ Chek™ is a battery-powered, portable, indoor air quality monitor and
information recording (data logging) instrument designed for both intermittent and
continuous operation. Its intended use is for indoor environments. A basic instrument
includes a multi-line LCD alpha numeric display, audible alarm, rechargeable
batteries, temperature and relative humidity sensors, and operation manual.
The IEQ Chek™ is equipped with top-mounted temperature and relative humidity
sensors to aid in verifying readings providing a comprehensive indication of air quality.
Information readings can be written to a plug-in (and removable) flash card to protect
your recorded information. The sample rate can be adjusted using the supplied
software or through the instrument menu. The instrument may be hand held, stood
upright on a flat surface, or fastened to a wall for permanent or semi-permanent use.
The IEQ Chek™ series of instruments are
manufactured with plug-and-play,
interchangeable sensor modules to allow for
the testing of multiple gases. The
specifications listed in this manual indicate a
wide array of supported sensors. These
sensors may be changed in the field and
operated within minutes (accurate readings
will require more time as each sensor type
has different warm-
up/stabilization periods
before they are able to perform to published
specifications).
NOTE: Calibration and repair are available at
our manufacturing facility and through some
of our authorized and trained distributors.
The IEQ Chek™ can reliably record time-
based information, which can be downloaded
via the USB port located on the right side of
the instrument. Any computer running
Microsoft Windows XP or higher (with an
available USB communications port) can
accommodate
the optional IQ Chek™
software.
If after reading the manual you have any
questions, please contact our service
department for technical support.
Figure 1-1. IEQ Chek™
The user can add up to five additional plug-and-play sensors (electrochemical toxic
gas and/or oxygen, infrared CO2, PID or catalytic combustible/flammable gas)
internally for a maximum of seven internal sensors. Currently, a large selection of
sensors is available to choose from. Refer to page 5.

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1.2. IEQ Chek™Shipping Checklist
This checklist ensures that you have received everything required to run your
IEQ Chek. If you do not receive any of the items listed below, contact the factory
immediately.
•IEQ Chek™ instrument
•AC wall adapter (6V @ 850 mA)
•Nickel-metal Hydride rechargeable batteries (3 דAA”)
•Calibration adapter (pump versions only)
•Operation manual
•IQ Chek™ datalogging kit (optional)
•Other specified accessories (see original sales order)
1.3. Key Features
Features of the IEQ Chek™ include the following.
•Light weight, contoured, and comfortable-to-hold enclosure
•Flame rated ABS/Polycarbonate enclosure
•Displays all installed sensors simultaneously on backlit LCD display
•Multi-function, easy-to-use menu
•Operates from nickel metal hydride (NiMH) rechargeable batteries (standard),
alkaline batteries, or continuously from the plug-in power adapter
•Hangs on a wall (rear slot), mounts on a camera tripod, or sits flat on a desk
•Accommodates a standard cable lock for securing the instrument in place
•Samples air with internal sample draw pump (pump version only)
•Accommodates electrochemical, catalytic, PID, or infrared sensor types
•16 different plug-and-play sensor choices
•Logs information and events to flash card (with optional datalogging kit)
•USB data downloading and auxiliary uploading from remote probes
•Optional IQ Checksoftware compatible with Windows XP, Vista, and 7.
1.4. Sensor Configuration Notes
It is important to note that although the IEQ Chek™ will accommodate seven sensors
(and five of those sensor locations are plug and play for gas sensors), there are
sensor placement considerations.
Either of the two front sensor locations will accommodate an infrared CO2sensor, PID
sensor, or catalytic combustible (flammable) gas sensor.
Of the five plug-and-play sensor locations, three are for electrochemical sensors. If
the user selects an oxygen (O2) sensor, it must be fitted to a specific sensor location
(rear center position, determined by looking at the front of the instrument). If the user
selects a nitric oxide (NO), requiring electronic bias within the circuit, it must be fitted
to one specific sensor location (left rear position, determined by looking at the front of
the instrument). Two sensors requiring bias cannot be fitted in the same instrument at
the same time. Reference the photos on pages 23 and 24 for specific sensor
locations.

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2 SPECIFICATIONS
2.1. General
Categories/Subcategories Descriptions
Enclosure
Dimensions L x W x D
7.75” x 3.87” x 3.06” (19.7 cm x 9.8 cm x 7.8 cm)
Weight 20 ounces (567 grams) including batteries
Covers Sensor cover (removable; top of enclosure)
Battery cover (removable; bottom of enclosure)
Mounting
Options
Threaded insert (bottom of enclosure) to
accommodate a camera tripod
Teardrop slot at the upper rear to allow instrument to
hang on a wall
Flat base for sitting on a flat table or desktop
Security Slot for cable lock (lower right side)
Construction Custom molded, rugged, contoured,
ABS/Polycarbonate
Flammability UL94 rating
Power
Standard Three rechargeable NiMH batteries
Option Three user-supplied AA alkaline batteries
Protection In-circuit protection diode (if the batteries are
accidently inserted with reversed polarity)
Continuous Plug-in, 6V DC, class-III, 2A DC max. wall adapter
User
Interface
Display Back-lit, multi-line LCD alphanumeric display
Buttons 3 tactile push-buttons for user access
Audio Openings at front top left for audible sounder
Monitoring
Mode
Internal Automatic sample pump for “active” sampling of target
environment
Option Diffusion monitoring version
Environ-
mental
Temperature Operating: 5° to 50° C (41° to 122° F)
Storage: -20° to 60° C (-4° to 140° F)
Relative
Humidity
Operating: 0 to 99% RH non-condensing
Storage: 0 to 99% RH non-condensing
CE
Certification
Standards
Safety I.S. EN 61010-1:2001 (Ed.2)
Emissions EN 50270:2006
Immunity EN 50270:2006

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Figure 2-1. IEQ Chek™ Dimensions
3.06
7.75
3.87″ (9.8 cm)

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2.2. IQ Chek™ DataLogging Software (Optional)
Minimum system requirements to operate the optional IQ ChekDataLogging
Software are listed in the table below.
Categories Descriptions
Microprocessor Personal computer with Pentium III class processor or better
RAM 512MB RAM (minimum)
Operating System Windows XP, Vista, or 7
Disk Space At least 1 MB of available disk space. Additional space is
required to store logger files and graph files.
Interface An available USB port
2.3. Available “Plug-and-Play” Sensors
Sensor
Standard
Measurement
Range
Sensor
Standard
Measurement
Range
Carbon Dioxide
(CO2)
0 - 5000 ppm Combustible
Gases/Vapors 0 - 100% LEL
0 - 10,000 ppm Oxygen (O2) 0 - 25.0% volume
0 - 5% volume Ammonia (NH3) 0 - 50 ppm
0 - 20% volume Hydrogen Sulfide
(H2S) 0 - 50 ppm
0 - 100% volume Sulfur Dioxide (SO2) 0 - 20 ppm
Carbon Monoxide
(CO) 0 - 50 ppm Formaldehyde (HCHO) 0 - 10 ppm
Nitrogen Dioxide
(NO2) 0 - 5.0 ppm Total Volatile
Organic Compounds
(TVOC)
0 - 50 ppm
Nitric Oxide (NO) 0 - 100 ppm 0 - 300 ppm
NOTE: Not all of the above sensors are available from stock. Delivery time for
sensors ordered will vary depending on which sensors are ordered, how many are
ordered and measurement range desired.
NOTE: Other measurement ranges are available for some sensors. Contact
Bacharach with desired range to confirm availability.
NOTE: Some of the these sensors must be calibrated with correlation gases because
they are more readily available. If the customer wishes them to be calibrated with the
exact target gas, extra charges will apply to acquire the specific gas if and when
available. In these cases, customer will be required to take delivery of the special
cylinder of span gas and dangerous goods and shipping costs will apply.
NOTE: Some of the above sensors have cross sensitivities to other gases (interfering
gases). Please refer to the sensor specification chart before ordering a specific sensor
if your application may have some of the interfering gases present.

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3. KEY COMPONENTS
3.1. Key Components: Front and Bottom Views
Figure 3-1. IEQ Chek™ Key Components (Front and Bottom Views)
BOTTOM VIEW
BRASS
THREAD FOR
TRIPOD
MOUNTING
BATTERY DOOR
SPEAKER
MULTI-LINE, MANUAL
BACK-LIT, LCD,
ALPHA-NUMERIC,
DIGITAL DISPLAY
WALL ADAPTER
PLUG (ON SIDE)
NOTE: 6VDC ONLY
TEMPERATURE & RH SENSORS ARE
INSTALLED IN A PLASTIC SINTER THAT
ATTACHES TO THE TOP OF THE
SENSOR COVER
SENSOR
COVER
LEXAN
LABEL
3-BUTTON
MEMBRANE
KEYPAD

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3.2. Key Components: Left Side View
Figure 3-2. IEQ Chek™ Key Components (Side View)
PUMP INLET FITTING
NOTE: ATTACHING FLOW
ADAPTER REQUIRES ONLY A
COUPLE TURNS OF THE FITTING.
SLOT FOR SECURING
CABLE LOCK (SIMILAR TO
THOSE USED FOR LAPTOP
COMPUTERS)
RUBBER COVER FOR USB
SLOT, AUXILIARY SLOT, AND
SD FLASH CARD SLOT
SLOT
FOR SD
FLASH
CARD
AUXILIARY PORT FOR
REMOTE PROBES
AIR VENTS FOR VENTING
BUILT-UP HEAT FROM
INTERNAL SENSORS
RUBBER COVER
REMOVED
USB PORT FOR
DOWNLOADING
TO PC

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3.3. Key Components: Top and Back Views
Figure 3-3. IEQ Chek™ Key Components (Top and Back Views)
MOLDED
SLOT FOR
HANGING
INSTRUMENT
ON WALL
SERIAL
NUMBER
LABEL
ACCESS HOLES TO
THREE SCREWS
HOLDING FRONT AND
REAR ENCLOSURE
HALVES TOGETHER
SECURING SCREW FOR
SENSOR COVER. DO NOT
OVER TIGHTEN.
OUTLET HOLE FOR
SAMPLED AIR. DO NOT
PLUG/BLOCK THIS HOLE.
TEMPERATURE
AND RH SENSORS
(INSIDE SINTER)
PUMP
VERSION
DIFFUSION
VERSION
SECURING SCREW FOR
SENSOR COVER. DO NOT
OVER TIGHTEN.
TEMPERATURE
AND RH SENSORS
(INSIDE SINTER)
NOTE: The
diffusion version is
NOT supplied with
an internal pump.
Sensors “breath”
through openings in the sensor
chamber cap. Response time
is very good for most gases.

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4. INSTRUMENT OPERATION
4.1. General
The IEQ Chek™ has an extensive menu system allowing the user to access a wide
range of features and functionality. All features and functions can be set to meet the
user’s specific requirements.
BUTTON PRESSING: The three membrane push-buttons on the front face of the
instrument should be pressed firmly. They have been designed such that an
accidental light touch does not register and change something unintentionally.
SECURITY CODE: Some functions within the menu system are protected by a
security code to prevent unauthorized or untrained personnel from accessing them
and changing critical values. All IEQ Chek™ instruments are shipped from the factory
with a generic security code of:
1 2 3 4
It is recommended that the user change this to a code known only to authorized
personnel.
DISPLAY ICONS: In addition to menus and sensor readings, the LCD of the IEQ
Chek™ may display icons to inform or alert the operator of certain operating
conditions. A summary of the common icons is provided below.
Icon Name Description
Battery
This icon is displayed when the instrument is being
powered by batteries. The battery icon flashes when the
battery power is low.
DataLogging This icon is displayed when datalogging is enabled.
AC Adapter This icon is displayed when the AC adapter is connected
and the unit is charging.
Lock This icon is displayed when the instrument is locked. To
unlock the instrument, enter the 4-digit security code.
Temperature This icon is displayed next to the current temperature
reading.

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4.2. Switching the Instrument On/Off
NOTE:When using push-buttons on front of instrument enclosure, press firmly and
watch the display for movement. A light finger press may not engage the domed
contact. This is to prevent accidental changes to settings.
SWITCH ON: Press the “MENU” button down momentarily then release. The
multi-line LCD will scroll through each of the information functions
as it warms up.
SWITCH OFF: Hold the “MENU” button down for five to six seconds then release.
The multi-line LCD will indicate Shutting monitor off.
After power up, the display indicates IEQ Chek™, PORTABLE AIR QUALITY
MONITOR,then WARMING UP UNIT PLEASE WAIT… and the inner sample draw
pump (if applicable) starts automatically sampling the environment. A symbol at the
bottom left corner of the display will indicate if the instrument is operating from
batteries or the plug-in wall adapter. After the warm-up period (approximately 3
minutes), the LCD indicates all installed sensors, their current real-time readings, and
a flashing cursor.
NOTE: More accurate real-time readings will occur after the sensors have warmed up
and stabilized.
NOTE: Warm-up mode can be skipped by holding the MENU button for 3-5 seconds.
4.3. Battery and Battery Warnings
The IEQ Chek™ operates from three different power sources: Rechargeable nickel
metal hydride NiMH) batteries (3 ×AA), disposable alkaline batteries (3 ×AA), or
plug-in wall adapter/battery charger. The IEQ Chek™ is supplied with and configured
for rechargeable batteries from the factory.
CAUTION: To change from one type of battery to another (e.g., rechargeable to
alkaline), you must first make the change through the instrument menu.
NOTE: The battery tabs are such that even if batteries are installed incorrectly (with
polarities reversed), no damage will occur. Nevertheless, always take care when
installing any kind of battery.
NOTE: The instrument will not charge the NiMH batteries unless the instrument is
switched off.
CAUTION: A yellow warning label is on the battery door of the IEQ Chek™ to alert
users of the potential risk of damage to the device if alkaline batteries are installed
and the user mistakenly attempts to recharge them with the supplied wall adapter.
Recharging alkaline batteries could cause them to leak, thus creating potential harm
and/or physical damage to the instrument. Damage caused by this type of action is
not covered under warranty and the manufacturer is not responsible.

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4.4. Main Menu Functional Overview
Pressing the MENU button after the main sensor array is displayed allows the user to
enter the extensive menu system. The first menu display includes the following.
PREVIOUS ALARM
CALIBRATE INFO
SETTINGS USB
DATALOG
NOTE: In all cases, use the ARROW DOWN or ARROW UP buttons to scroll through
any displayed menu and use the MENU button to select any highlighted choices.
PREVIOUS: Allows the user to go back to the previous function. Pressing the
MENU button repeatedly at “PREVIOUS” will step the user back
one menu at a time until he finally reaches the main sensor real-
time display. Alternatively, hold down the MENU button for
approximately 6 to 7 seconds and the LCD will jump back to the
main, real-time sensor display.
CALIBRATE: Allows the user to enter the calibration section of the menu. This
section is protected by a security code to prevent unauthorized
people from attempting to calibrate the sensors. Refer to the
calibration section starting on page 19.
SETTINGS: This menu item provides the user with a number of instrument
functions that can be set or modified to suit their personal use.
DATALOG: This menu item allows the user to set up the internal data logger to
suit his specific application. This function can also be achieved
with the instrument connected to a computer. Set up and
programming through a PC is faster, but the IEQ Chek™ data
logging function can be completely set up through the menu in the
instrument.
ALARM: This menu item allows the user to set the alarm levels as well as
which alarms are activated.
INFO: Provides the user with information on the instrument such as serial
number assigned and date of manufacture. It also provides the
user with information on the installed sensors such as sensor
serial number, date code, and calibration date information.
USB: Allows the user to reset the USB chip if the IEQ Chek™ will not
communicate with IQ Chek™ software.

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5. MENU FUNCTION DETAILS
5.1. Calibrate Menu
Pressing the MENU button when CALIBRATE is selected accesses the calibration
menu. The LCD immediately prompts the user to ENTER SECURITY CODE.The
user must input the 4-digit security code to access the calibration menu. This
discourages unauthorized users from accessing and tampering with the calibration
settings. All IEQ Chek™ instruments are shipped from the factory with a generic
security code setting of “1234”. The user can easily change this code setting for extra
security. For additional information on changing the security code, see page 15.
NOTE: If the wrong security code has been entered, the LCD displays INVALID
SECURITY CODE ENTERED and the display returns to the menu list.
The calibration menu provides the user with two main functions to calibrate all gas
sensors: ZERO and SPAN. Both of these functions are required as part of the regular
instrument maintenance to achieve best performance from the sensors. The zero
function must be performed before the span function.
Below are general guidelines for sensor calibration frequency for best performance.
Sensor Types Calibration Frequency
Recommendations
Photo Ionization Detection (PID) sensors for Total
Volatile Organic Compounds (TVOCs) Every 3 months*
Electrochemical toxic gas sensors Every 6 months
O2sensors (use “clean” ambient environment) Every 6 months
Infrared CO2or combustible gas sensors Every 12 months
Temperature sensors (at factory) Every 12 months
Relative humidity sensors (at factory) Every 12 months
* Depends on exposure amount and duration.
NOTE: Total Volatile Organic Compound (TVOC) sensors measure the “total”
response from all VOCs in the target area and cannot identify individual gases or
chemicals.
Both zero and span functions are automated. Before span adjusting the sensor, the
user must first tell the IEQ Chek™ what concentration of span gas is being used to
span each sensor. This does not apply to temperature, RH, or oxygen sensors.
Temperature and RH sensors must be calibrated using a controlled environment such
as a calibration chamber. With oxygen sensors, it is assumed you will use the
environment around you because it contains approximately 20.9% O2.
NOTE: For more information on the calibration function, see page 19 of this manual.