Airflow Systems IAQ50 User Manual

OWNER’S MANUAL
Indoor Air Quality
Meter
Model IAQ50

LIMI TATIO N OF WARRANTY AND LIABILITY

a. Hot-wire or hot-film sensors used with research anemometers, and certain other
components when indicated in specifications, are warranted for 90 days from the date of shipment.
b. Parts repaired or replaced as a result of repair services are warranted to be free
from defects in workmanship and material, under normal use, for 90 days from the date of shipment.
c. Seller does not provide any warranty on finished goods manufactured by others or
on any fuses, batteries or other consumable materials. Only the original manufacturer's warranty applies.
d. Unless specifically authorized in a separate writing by Seller, Seller makes no
warranty with respect to, and shall have no liability in connection with, goods which are incorporated into other products or equipment, or which are m odif ied b y any person other than Seller.
The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein. NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE.
TO THE EXTENT PERMITTED BY LAW, THE EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE LIMIT OF SELLER'S LIABILITY FOR ANY AND ALL LOSSES, INJURIES, OR DAMAGES CONCERNING THE GOODS (INCLUDING CLAIMS BASED ON CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE, OR, AT THE OPTION OF SELLER, THE REPAIR OR REPLACEMENT OF THE GOODS. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES. SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION, DISMANTLING OR REINSTALLATION COSTS OR CHARGES. No Action, regardless of form, may be brought against Seller more than 12 months after a cause of action has accrued. The goods returned under warranty to Seller's factory shall be at Buyer's risk of loss, and will be returned, if at all, at Seller's risk of loss.
Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms waived, except by writing signed by an Officer of Seller.
Service Policy
Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers, our service policy is designed to give prompt attention to any problems. If any malfunction is discovered, please contact your nearest sales office or representative, or call Customer Service department at +44 (0) 149 4 459200 (UK), (800) 874-2811 (USA), or (1) 651-490-2811 (International).
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Table of Contents

LIMITATION OF WARRANTY AND
LIABILITY................................................................... ii
SECTION 1 General Description .................................5
SECTION 2 Safety...........................................................6
SECTION 3 Setting-Up ..................................................7
Supplying Power to the Model IAQ50 .....................7
Installing the Batteries................................................. 7
Using the Optional AC Adapter ................................7
Start up Sequence for the Model IAQ50...................8
Battery Percentage...................................................8
Log Percentage......................................................... 8
Baud Rate..................................................................8
Setting the Real-Time Clock...................................8
Barometric Pressure ................................................9
Using the Sensing Probe ...........................................10
SECTION 4 Detailed Operation.................................10
Keypad Functions ......................................................10
ON/OFF Key .........................................................11
CO
Key ...................................................................11
2
TEMP Key...............................................................12
HUMID Key ...........................................................13
READ/ENTER Key...............................................13
TIME LOG Key ......................................................14
NEXT TEST Key.....................................................16
%OA (Percent Outside Air) Key .........................16
BP Key .....................................................................21
RECALL Key ..........................................................22
Arrow Keys (56).................................................23
DEL Key ..................................................................24
Printing Data Using the Optional MicroPrinter ...25
Connecting the Optional MicroPrinter...................25
3
SECTION 5 Maintenance ............................................ 26
Probe Tip..................................................................... 26
Cases ............................................................................ 27
Storage......................................................................... 27
SECTION 6 Service and Calibration ........................ 27
Factory Calibration.................................................... 28
Field Calibration ........................................................ 29
Field Calibration Procedure ............................ 29
CO
2
Temperature and Humidity Calibrations
Adjustment Procedure.............................................. 32
SECTION 7 Troubleshooting ..................................... 34
SECTION 8 DIP Switch Settings............................... 36
Specifications................................................................. 38
4
SECTION 1
General Description
The Model IAQ50 measures Carbon Dioxide (CO relative humidity, and calculates dew point and wet bulb. It also calculates the percentage of outside (make up) air in a given indoor space, using CO temperature. The instrument will deter­mine statistics and recall individual data points for up to 255 test IDs. The Model IAQ50 will retain data even after it is turned off.
The IAQ50 ships in a soft-sided carrying case that holds the meter and probe, a probe stand, and calibration collar. There is space in the case for an optional Micro­Printer and charger. The instrument ships with batteries (which are not installed), a calibration sheet, and this Owner’s Manual.
) level, temperature and
2
levels, or
2
5
SECTION 2
Safety
When using the IAQ50 to check for CO temperature or humidity values, make certain that you can safely raise and hold the instrument while making measure­ments. Be especially careful when working on a ladder.
Observe all necessary precautions so that the unit does not become caught in moving machinery or touch any exposed electrical wiring.
DANGER! Use with corrosive or other dangerous or explosive gas mixtures is not recom­mended.
WARNING! Do not expose the sensing probe to excessive heat—it can damage the sensors and probe.
2,
6
SECTION 3
Setting-Up

Supplying Power to the Model IAQ50

The Model IAQ50 can be powered in one of two ways: four AA-size batteries or an optional AC adapter.

Installing the Batteries

Insert four AA batteries as indicated by the diagram located on the inside of the battery compartment. The Model IAQ50 is designed to operate only with alkaline batteries, which are included. At 15% battery life remaining, the battery indica­tor will show that the batteries need to be changed.

Using the Optional AC Adapter

The optional AC adapter allows you to power the Model IAQ50 from an AC outlet. When using the AC adapter, the batteries (if installed) will be bypassed. The AC adapter is NOT a battery charger.
7

Start up Sequence for the Model IAQ50

When the instrument is turned on, all segments of the display will light up and then the meter goes through a start-up sequence.
Battery Percentage
This shows the remaining amount of battery power.
Log Percentage
This shows how much of the datalog­ging memory is still available.
Baud Rate
The Model IAQ50 has a DEFAULT baud rate of 1200, which allows it to commu­nicate with the optional portable Micro­Printer.
Setting the Real-Time Clock
The Model IAQ50 has an internal clock that keeps track of the time (the format is HH.MM where HH is the hour in 24­hour format and MM is minutes) and the date. It is very important to set the time and date correctly, otherwise date
8
and time stamping of recorded data will not be correct.
To set the time and date, press and hold either 5 or 6 key during the power-up sequence when the time is displayed. Release the keys when the Model IAQ50 beeps twice. You will have an opportu­nity to view and/or change the minutes (min), hours, year, month and date in sequence. Use the 5 or 6 key to change
any settings. Use the ENTER key to store
each setting and advance to the next one.
Barometric Pressure
The default barometric pressure is 29.92. To change this, press the 5 or 6 keys.
Press ENTER to store the new value. Be
sure to use “stations pressure” which may be available at the local airport. “Station pressure” is not corrected to sea level. The barometric pressure is used to correct the CO
readings and to calculate
2
the wet bulb.
The instrument then displays current conditions. To skip the start-up
9
sequence, press and hold the ENTER
key at any point of the start-up sequence, until the meter beeps.

Using the Sensing Probe

The sensing probe relies on the diffusion of air. For best results, try to keep the sensing probe surrounded by moving air.
Do not breathe on the probe, since humans exhale levels well exceeding 10,000 ppm
and it may take time for the probe to
CO
2
re-stabilize.
SECTION 4
Detailed Operation

Keypad Functions

When pressing the keys on the front panel, the Model IAQ50 will beep to confirm the function. If you press a key and it does not beep, the instrument does not allow that function during the selected mode.
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ON/OFF Key
Press the ON/OFF key to turn the in-
strument on and off. When the instru­ment is first turned on, it goes through a preprogrammed power-up sequence that includes an internal self-check (when all displayable items are shown). The Model IAQ50 begins by displaying percentage of battery life remaining (accurate for alkaline batteries only), the percentage of memory available, baud rate, time (HH.MM) and entered baro­metric pressure. At this point, the Model IAQ50 will start measuring CO
2,
tem-
perature and % relative humidity.
If a problem is detected, the display will show “CAL” to indicate that it should be returned for service and/or calibration.
Note: To skip the start-up display, press and
hold ENTER at any time during the power-
up sequence.
CO
Key
2
The Model IAQ50 will automatically start in CO
mode. To return to this
2
mode from another measurement pa-
11
rameter, press the CO
key. Then, place
2
the probe in the location you want to
measure gas concentration.
TEMP Key
The meter will always display tempera­ture readings from the permanent sensor on the lower line of the display. When you wish to take an external tempera­ture reading using an RTD probe, plug any three-pronged RTD probe into the
right side. Then, press the TEMP key to
view the temperature from the resistive temperature detector (RTD). The letters
Prb” will display on the top line of the
display and the actual temperature from the RTD on the bottom line.
To return to reading temperatures from
the permanent probe, press the TEMP
key again.
Note: If the external RTD probe becomes
unplugged while in Prb mode, the display will read “over.” If the RTD probe is not plugged in and the TEMP key is pressed,
nothing will happen.
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