Model 8550/8551 Q-TRAK ™ IAQ Monitor Operation and

Model 8550/8551
Q-TRAK ™ IAQ Monitor
Operation and Service
Manual
April 1999
P/N 1980197 Rev. H
®
TSI Incorporated
Model 8550/8551
Q-TRAK ™ IAQ Monitor
Operation and Service
Manual
April 1999
P/N 1980197 Rev. H
SHIP TO:
TSI Incorporated
500 Cardigan Road
Shoreview, MN 55126-3996
USA
U.S.
Sales & Customer Service:
(800) 926-8378/(651) 490-2760
Fax:
(651) 490-2704
MAIL TO:
TSI Incorporated
P.O. Box 64394
St. Paul, MN 55164-0394
USA
E-mail address:
Health.safety@tsi.com
Web site:
http://www.tsi.com
INTERNATIONAL
Sales & Customer Service:
(001 651) 490-2760
Fax:
(001 651) 490-2704
Copyright ©
TSI Incorporated/July 1997–1999/All rights reserved.
Address
TSI Incorporated/P.O. Box 64394/St. Paul, MN 55164/USA
Fax No.
(651) 490-2704
Limitation of Warranty and Liability
Seller warrants that this product, under normal use and service as described in the operator's manual, shall be free
from defects in workmanship and material for a period of twelve (12) months, or the length of time specified in
operator's manual, from the date of shipment to the customer. This limited warranty is subject to the following
exclusions:
a.
Batteries, hot wire or hot film sensors and certain other components when indicated in specifications are
warranted for a period of 90 days from the date of shipment to the customer.
b.
With respect to any repair services rendered, Seller warrants that the parts repaired or replaced will be free
from defects in workmanship and material, under normal use, for a period of 90 days from the date of
shipment to the customer.
c.
Seller does not provide any warranty on finished goods manufactured by others. 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, any goods which are incorporated into other products or equipment
by the Buyer. All goods returned under warranty shall be at the Buyer’s risk of loss, Seller’s factory prepaid,
and will be returned at Seller’s risk of loss, Buyer’s factory prepaid.
The foregoing is IN LIEU OF all other warranties and is subject to the conditions and LIMITATIONS stated
herein. NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE
OR MERCHANTABILITY IS MADE.
THE EXCLUSIVE REMEDY OF THE USER OR PURCHASER, AND THE LIMIT OF THE LIABILITY OF
SELLER FOR ANY AND ALL LOSSES, INJURIES, OR DAMAGES IN CONNECTION WITH THIS
PRODUCT (INCLUDING CLAIMS BASED ON CONTRACT, NEGLIGENCE, STRICT LIABILITY,
OTHER TORT, OR OTHERWISE) SHALL BE THE RETURN OF THE PRODUCT TO THE FACTORY OR
DESIGNATED LOCATION AND THE REFUND OF THE PURCHASE PRICE, OR, AT THE OPTION OF
SELLER, THE REPAIR OR REPLACEMENT OF THE PRODUCT. IN NO EVENT SHALL SELLER BE
LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES. SELLER SHALL NOT
BE RESPONSIBLE FOR INSTALLATION, DISMANTLING, REASSEMBLY OR REINSTALLATION
COSTS OR CHARGES. NO ACTION, REGARDLESS OF FORM, MAY BE BROUGHT AGAINST THE
SELLER MORE THAN ONE YEAR AFTER THE CAUSE OF ACTION HAS ACCRUED.
The purchaser and all users are deemed to have accepted the terms of 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 or modified nor may any of its terms be waived except by
a writing signed by an authorized representative 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 TSI's Customer Service department at (800) 926-8378
(USA) or (001 651) 490-2760 (International).
CONTENTS
1. UNPACKING AND PARTS IDENTIFICATION............................1
Unpacking the Q-TRAK ................................................................1
Parts Identification for the Q-TRAK ..............................................2
2. SETTING-UP..............................................................................3
Supplying Power to the Q-TRAK ..................................................3
Installing the Batteries ..........................................................3
Using the AC Adapter ...........................................................3
Instrument Setup ........................................................................3
Setting-up TRAKPRO Data Analysis Software .........................3
Connecting the Q-TRAK to a Computer .................................3
Set-Up the Communications Port..........................................4
Setting the Real-Time Clock .................................................5
Programming the Date/Time Using TrakPro .........................5
Manually Setting the Real-Time Clock ..................................6
Using the Probe Stand..........................................................6
Connecting the Optional Model 8925 Portable Printer...........6
3. OPERATION ..............................................................................7
Overview ....................................................................................7
Keypad Functions .......................................................................7
ON/OFF Key...............................................................................7
CO2 Key......................................................................................8
TEMP Key ..................................................................................8
HUMIDITY Key ...........................................................................9
CO Key (Model 8551 Only) .........................................................9
SAMPLE Key..............................................................................9
TIME CONSTANT Key ...............................................................9
Programming the Available Time Constants .............................10
STATISTICS Key......................................................................10
PRINT Key................................................................................11
SAMPLING MODE Key ............................................................11
Survey Mode: .....................................................................11
LOG Modes: .......................................................................12
CLEAR MEMORY Key..............................................................12
LOGGING INTERVAL Key........................................................13
Programming the Logging Intervals Using TRAKPRO...............13
é and ê Keys ..........................................................................14
Display/Keypad Lockout Switch ................................................14
Programming Advanced Modes: LOG 2 and LOG 3..................14
Sample Protocol for LOG 2 and LOG 3 Modes .........................18
i
Things You Should Know About Taking Pre-Programmed
Samples ................................................................................19
Memory Considerations ............................................................20
4. CALIBRATION AND MAINTENANCE ......................................21
Calibrating the CO2 Concentration Measurement ......................21
Calibrating the Temperature or Relative Humidity
Measurement.........................................................................23
Calibrating the CO Concentration Measurement
(Model 8551 only) ..................................................................24
Replacing the CO Sensor..........................................................26
Storage Precautions..................................................................27
5. TROUBLESHOOTING .............................................................29
APPENDIX A: SPECIFICATIONS...................................................31
APPENDIX B: INTERNAL DIP SWITCH SETTINGS......................35
ii
Chapter 1
Unpacking and Parts Identification
Carefully unpack the Q-TRAK IAQ Monitor from the shipping container.
Use the tables and illustrations below to make certain that there are no
missing components. Contact TSI immediately if anything is missing or
damaged.
Packing List for the Model 8550/8551 Q-T RAK IAQ Monitor
Quantity
1
1
4
1
1
1
1
1
1
1
1
1
1
1
Item Description
Q-TRAK IAQ Monitor
Carrying Case
AA Alkaline Batteries
AC Adapter
115 V, NEMA-5
230 V, Eur., CEE 7/16
230 V, Great Britain
240 V, Australian
TRAKPRO Data Analysis Software on
3.5 inch diskette*
CO2 Calibration Collar
CO Calibration Adapter (Model 8551
only)
CO Sensor (Model 8551 only)
Probe Stand
Computer Interface Cable (RS-232)
25-Pin to 9-Pin Serial Cable Adapter
Q-TRAK IAQ Monitor Operation and
Service Manual
TRAKPRO Data Analysis
Software User’s Manual
Certificate of Calibration
Part/Model
8550/8551
800680
1206013
2613033
2613078
800169
2613105
800700
800678
800696
800695
800679
800560
1302690
1980197
1980200
-
*The software is provided on 3.5” high-density diskettes. If you require 5.25” 360k
diskettes, please contact your local distributor or TSI. Free 5.25” diskettes will be
provided promptly.
1
Parts Identification for the Q-TRAK
Figures 1–1 and 1–2 identify the parts of the Q-TRAK IAQ Monitor. Please
become familiar with these components before proceeding.
11
7 8
1
12
Model 8550
2
5
13
Model 8551
6
3
9
4
1.
2.
3.
4.
5.
6.
10
Figure 1–1: Q-TRAK
Display
7. Location of Humidity Sensor
Keypad
8. Location of Temperature Sensor
External Power Socket
9. Location of CO2 Sensor
Data Port RS-232
10. Probe Handle
Probe Mounting Clips
11. Battery Access Cover
Display/Keypad Lockout
12. Wrist Strap
Switch
13. Location of CO Sensor
(model 8551 only)
1
2
3
6
5
4
Figure 1–2: Q-TRAK Accessories
1. AC Adapter
4. Computer Interface Cable
2. 25-Pin to 9-Pin Adapter
5. Probe Stand
3. CO2 Calibration Collar
6. CO Calibration adapter
(Model 8551 Only)
2
Chapter 1
Chapter 2
Setting-Up
Supplying Power to the Q-T RAK
The Q-TRAK IAQ Monitor must be powered in one of two ways: four size
AA batteries or the supplied AC Adapter.
Installing the Batteries
Insert four size AA batteries as indicated by the diagram located on the
inside of the battery compartment. TSI ships the Q-TRAK with alkaline
batteries. NiCd rechargeable batteries may also be used.
Using the AC Adapter
The AC Adapter allows you to power the Q-TRAK from an AC wall
outlet. When using the AC adapter, the batteries (if installed) will be
bypassed. The AC adapter is not a battery charger and will not charge
NiCd batteries.
The Q-TRAK has an internal, non-user accessible battery that is used to
keep memory intact when power is turned off. Changing the AA-size
batteries or disconnecting the AC adapter will not cause data to be lost.
This battery is designed to last for years. TSI will install a new battery,
if necessary, when the unit is returned to the factory for service.
Instrument Setup
The Q-TRAK comes with special software called TRAKPRO, which is
designed to provide you with maximum flexibility and power when using
the Q-TRAK. The following sections describe how to install the software and
setup the computer.
Setting-up TRAKPRO Data Analysis Software
TRAKPRO software contains a very comprehensive Help Function. This
utility provides all the necessary information to guide you in all aspects
of software operation.
Connecting the Q-T RAK to a Computer
Each Q-TRAK comes equipped with an RS-232 cable and a 25-pin to
9-pin serial cable adapter. One end of the cable is a 25-pin D
subminiature connector labeled COMPUTER; the other end is an RJ-45
modular connector that mates with the logging instrument. Serial port
connectors always have pins (male) on the computer side.
3
1.
Locate an available serial port on your computer: COM1, COM2,
COM3, or COM4.
2.
If the port has a 25-pin connector, you do not need the adapter. If
the port has a 9-pin connector, plug the 25-pin end of the adapter
into the RS-232 cable.
3.
Connect the RS-232 cable to the available serial port on your
computer.
4.
Connect the RJ-45 connector to the Q-TRAK.
Set-Up the Communications Port
To communicate with the Q-TRAK, the software must be configured for
the proper COM port. TRAKPRO can be manually set to operate on a
specific COM port, or it can automatically find a Q-TRAK that is
attached to any COM port. To set up the COM port, do the following:
1.
Turn on the Q-TRAK and start TRAKPRO.
2.
Select Communications from the Instrument Setup menu. The
following dialog is displayed:
3.
Select the following:
Serial
Port
Baud
Rate
4
Select the name of the serial port to which the
logging device is connected: COM1, COM2, COM3,
or COM4.
Select the baud rate for the port. Higher baud rates
are recommended to transfer data at a faster rate.
Select a lower baud rate only if you are having
trouble communicating at a higher rate.
Chapter 2
4.
Select Test to verify that you have set up the communications port
properly. The system displays an informative message indicating
whether it was able to establish communications.
5.
As an alternate, you may select Find Port, to have TRAKPRO
search the available COM ports, looking for an attached Q-TRAK.
6.
Select OK to accept the setup or Cancel to discard the changes.
Note: Some computers do not communicate reliably at baud rates
above 9600.
Setting the Real-Time Clock
The Q-TRAK has an internal real-time clock that keeps track of the time
of day (the format is HH:MM where HH is the hour in 24-hour format
and the MM is minutes) and the date. It is very important for the
Q-TRAK to have the time and date correctly set; otherwise, date and
time stamping of recorded data and calibrations will not be correct.
There are two ways to set the time and date. The first is to use the
supplied TRAKPRO Data Analysis Software.
Programming the Date/Time Using TrakPro
To program the Q-TRAK date and time:
1.
Make sure the Q-TRAK is connected to the computer and turned on.
2.
Select Parameters, then Clock from the Instrument Setup menu.
TRAKPRO retrieves the current date and time settings from Q-TRAK
and displays them in the following dialog:
3.
The system date and time (from the computer) may be transferred
to the Q-TRAK using the “arrows” keys. Alternately, the date and
time may be manually entered into the dialog box.
5
4.
Select Send to reprogram the Q-TRAK.
Manually Setting the Real-Time Clock
To set the time and date with the keypad, you must press and hold the
SAMPLE key down while the Q-TRAK displays the time of day during
its power-up sequence. Release when the Q-TRAK “beeps.” You will
have an opportunity to view and/or change the hours, minutes, year,
month and day of month in sequence. Use the up and down arrow keys
(éê) to change a setting. Use the SAMPLE key to store each setting
and advance to the next one.
Using the Probe Stand
For your convenience, the Q-TRAK is supplied with a probe stand so
that the probe can be located above a table surface while unattended. To
use it, simply detach the probe from the Q-TRAK mounting clips and
slide it onto the stand.
Connecting the Optional Model 8925 Portable Printer
To connect the Model 8925 printer to the Q-TRAK, locate the Printer
Interface cable (supplied with optional printer) and connect the 9-pin
end labeled “PRINTER” to the printer and the other end to the data
port on the Q-TRAK. Always turn the Q-TRAK on BEFORE the printer.
If the printer prints question marks (??????), asterisks (******), or
random characters, reset it by turning it off and then on again. If
necessary, refer to the Model 8925 Portable Printer Operation and
Service Manual.
6
Chapter 2
Chapter 3
Operation
Overview
The Model 8550 and Model 8551 Q-TRAK IAQ monitors measure CO2,
temperature, and relative humidity. In addition the Model 8551 also
measures CO concentration. All parameters are measured simultaneously in
a single probe. The Q-TRAK has four modes of operation, Survey, LOG 1,
LOG 2, and LOG 3. When the Q-TRAK is first turned on it will be in Survey
mode which is used to display real-time readings and to determine statistics
such as average, minimum, and maximum readings. LOG 1 mode is used to
record individual data points for later analysis using a factory set protocol.
LOG 2 and LOG 3 modes have user-defined protocols, set up using
TRAKPRO software. TRAKPRO software is used for analysis of data taken in
any of the three LOG modes, but cannot be used on samples taken in Survey
mode.
Keypad Functions
When pressing the keys on the front panel, the Q-TRAK will beep to confirm
the function. If you press a key and the Q-TRAK does not beep, the Q-TRAK
does not allow that function during the selected sampling mode. To disable
the beep, refer to Appendix B: “Internal DIP Switch Settings.”
ON/OFF Key
Use the ON/OFF key to turn the Q-TRAK on and off. When the instrument
is first turned on it goes through a preprogrammed power-up sequence that
includes an internal self-check. First, all displayable items will appear for a
few seconds. If a problem is detected, the display shows the message
“SERVICE” along with a number to indicate that the Q-TRAK requires
servicing. Refer to Chapter 5: “Troubleshooting” for information regarding
service numbers. If the “SERVICE” message appears, the Q-TRAK pauses
until any key is pressed.
When the Q-TRAK completes its internal self-check, it will display the
approximate percentage of battery life remaining. The Q-TRAK displays the
battery symbol + – when the battery voltage becomes very low. After the
battery symbol appears, the Q-TRAK runs for approximately 60 minutes
before displaying the message “LO” (for a few seconds) and then
automatically turning off. This feature is accurate for alkaline batteries only.
7
The percentage life remaining will not be accurate for NiCd batteries. The
battery symbol appears when battery voltage becomes low, but the Q-TRAK
will run considerably less than 60 minutes before displaying the message
“LO” and turning off.
CO2 SAMPLE
CALIBRATE ZERO RECORDING
HR:MN:SEC TEST ID LOG 123
CO2 SAMPLE
ELAPSED TIME
PPM CONSTANT
°F°C
AVERAGE
%RH
MIN MAX
mg/m3
SERVICE
% MEMORY
Figure 3–1: Q-TRAK Display With All Elements Shown
After displaying the percentage of battery life remaining, the current time
set on the internal real-time clock is displayed. When the self-check is
complete, the Q-TRAK will be in Survey mode.
CO2 Key
Press the CO2 key to display CO2 readings. Carbon dioxide concentration
readings will be displayed in units of parts per million (ppm). Place the
sensor in the location where you want to take the measurement. The probe
must be fully exposed because the CO2 sensor is located between the probe
tip and the handle, not at the tip.
!
Caution
Do not hold the probe close to your breathing zone. Humans
exhale CO2 and this will influence the readings.
TEMP Key
Press the TEMP key to display air temperature readings. The temperature
sensor is located near the tip of the probe. The Q-TRAK displays temperature
readings in either degrees Celsius (°C) or degrees Fahrenheit (°F)
depending on the DIP switch settings (refer to Appendix B).
!
8
Caution
Do not use the Q-TRAK to measure the temperature of liquids.
The sensor is not designed for submersion.
Chapter 3
HUMIDITY Key
Press the HUMIDITY key to display humidity readings. The humidity
sensor is located near the tip of the probe. The readings will be in units of
percent relative humidity (%rh).
!
Caution
The humidity sensor is sensitive to the effects of water. Do not
expose the sensor to liquid water. This will damage the sensor.
Also, the humidity sensor will not function properly while
exposed to intense light, such as direct sunlight. Shade the
probe to avoid false readings.
CO Key (Model 8551 Only)
Press the CO key to display CO readings. Carbon monoxide concentration
readings are displayed in units of parts per million (ppm). The CO sensor is
located at the tip of the probe.
SAMPLE Key
Press the SAMPLE key to start/stop data sampling. The word “SAMPLE”
appears in the upper-right corner of the display while the Q-TRAK is taking
a sample. When sampling is stopped, the Q-TRAK automatically scrolls
through statistics for the sample that just ended.
TIME CONSTANT Key
Momentarily press and release the TIME CONSTANT key to view the
current time-constant. To change the time-constant, press and hold the key
down. The available time-constant choices will sequence on the display.
When the desired value is displayed, immediately release the key.
The time-constant is actually an averaging period. The Q-TRAK display is
always updated every second; however, the reading displayed is the average
reading over the last time-constant period. For example, if the current timeconstant is set to 10 seconds, the display shows readings averaged over the
previous 10 seconds, updated every second. This is also called a 10-second
“moving average.”
As configured at the factory, the available time-constant values are 2, 5, 10,
15, and 20 seconds. The internal list of time-constant values can be altered
using Q-TRAK Data Analysis Software supplied with the Q-TRAK. The
range of time constants allowed is 2–60 seconds. See the following
instructions.
Operation
9
Programming the Available Time Constants
To program the list of time constants using Q-TRAK Data Analysis
Software:
1.
Make sure the Q-TRAK is connected to the computer and turned on.
2.
Select Parameters, then Time Constants from the Instrument Setup
menu. TRAKPRO retrieves the current time constant settings from the
Q-TRAK and displays them in the following dialog:
3.
Enter a value for each of the five available time constants. (The range is
limited to 2–60 seconds.)
4.
Select Send.
The Q-TRAK is reprogrammed to offer the time constants you have
specified.
STATISTICS Key
Use the STATISTICS key to sequentially view the average, minimum, and
maximum readings as well as the elapsed time of the most recently sampled
data. You may view sample statistics while the sample is in-progress;
however, one time-constant must have elapsed first. If one of the LOG
modes is active, a test identification number is displayed also. Press the
STATISTICS key once to display the average reading, again to display the
minimum reading, again to display the maximum reading, and again to
display the elapsed time for that sample (and again for the test ID if in LOG
mode). If you press the STATISTICS key a fifth time (sixth time if in LOG
mode), the Q-TRAK switches back into the currently selected measuring
mode. You must sequence through all four statistic displays (i.e., press the
10
Chapter 3
STATISTICS key five times, six if in LOG mode) before the Q-TRAK goes
back into the currently selected measuring mode. All parameters are
measured simultaneously. The display shows only the data for the current
measurement mode. The measurement mode may be changed at any time to
view statistics for the other measurements.
PRINT Key
Use the PRINT key to print information on the optional Model 8925
Portable Printer. The information printed will be different depending on
what the Q-TRAK is currently doing.
When the Q-TRAK is displaying real-time readings, pressing the PRINT key
will cause all parameters being measured to be printed along with the time
and date. Each time the PRINT key is pressed, one set of values prints. The
values printed reflect the current time-constant; therefore, they are the same
as would be displayed.
When the Q-TRAK is displaying any statistic, pressing the PRINT key will
cause the current statistics to print. All statistics are printed as a set
regardless of which one is currently displayed.
When the Q-TRAK is in one of the LOG modes and is idle (“%MEMORY”
is displayed), pressing the PRINT key will cause the logging setup for the
current LOG mode to print.
If you press and hold the PRINT key during the power-up sequence, and
you have the optional Model 8925 printer connected, a printout showing
certain system information occurs.
SAMPLING MODE Key
The SAMPLING MODE key allows you to select between the four
sampling modes: Survey, LOG 1, LOG 2, and LOG 3. Each time you press
the SAMPLING MODE key, the Q-TRAK will sequence to the next mode.
When the Q-TRAK is in Survey mode, the current measurement is shown on
the display. When one of the LOG modes is selected, the LOG mode
number, i.e., “LOG 1,” “LOG 2,” or “LOG 3” is displayed along with the
percentage of free memory available.
Survey Mode:
When the Q-TRAK is first turned on, it will always be in Survey mode.
Survey mode allows you to make simultaneous measurements of CO2
concentration, temperature, and relative humidity, and to obtain
statistics for each measurement when a sample is taken. The statistics
include the average, minimum, and maximum values, as well as the
elapsed time for that sample. Individual data points are not recorded
Operation
11
(this can be done in any of the LOG modes). Each new sample taken in
Survey mode clears the previous sample data from memory. Data taken
in Survey mode remains in memory until another sample is made, or
until samples are taken in one of the LOG modes. Turning the Q-TRAK
off will not erase data. Use the SAMPLE key to start and stop a
sample.
LOG Modes:
There are three LOG modes: LOG 1, LOG 2, and LOG 3. When one of
these modes is selected using the SAMPLING MODE key, the LOG
mode number is listed at the top of the display. The LOG modes allow
you to record data points for later retrieval and analysis using the
software provided with the instrument.
Use the SAMPLE key to start and stop recording. The word
“RECORDING” appears at the top of the display when recording is in
progress. Use the CO2, TEMP HUMIDITY, or CO keys to select which
measurement is displayed during recording.
The frequency that data is recorded can be set for LOG 1 mode with the
LOGGING INTERVAL key. Use TRAKPRO software for LOG 2 and
LOG 3 modes.
Data recorded using one of the LOG modes can only be erased by using
the CLEAR MEMORY key. Turning the Q-TRAK off will not erase
data. Recording another sample with one of the LOG modes, without
clearing memory first, causes new data to be added to the existing data
(using a new test ID).
CLEAR MEMORY Key
Use the CLEAR MEMORY key to erase all data. The CLEAR MEMORY
key will not respond unless the Q-TRAK is first put into one of the three
LOG modes by using the SAMPLING MODE key.
Note: You should first download your data to your computer through the
TRAKPRO software. There is only one block of memory in the
Q-TRAK. Clearing the memory for one LOG mode clears memory for
all LOG modes.
To clear memory, press and hold the CLEAR MEMORY key until the
countdown reaches zero, then release quickly. This prevents accidental
erasure of data. Releasing the key too soon or too late prevents memory
from being cleared … try again.
12
Chapter 3
LOGGING INTERVAL Key
Use the LOGGING INTERVAL key to view or set the frequency/averaging
period for recording data in LOG 1 mode or to view the current interval
setting in LOG 2 and LOG 3 mode. Use TRAKPRO software to set the
logging interval for LOG 2 and LOG 3 mode. The LOGGING INTERVAL
key will not respond unless the Q-TRAK is first put into one of the three
logging modes. Press the LOGGING INTERVAL key momentarily to view
the current logging interval. Press and hold the LOGGING INTERVAL
key to sequence through the available choices and release the key when the
desired interval is on the display (LOG 1 mode only).
The logging interval is both a frequency and an averaging period. For
example, when the logging interval is set to 30 minutes, readings will be
recorded at 30-minute intervals. Each reading will be the average value
measured over that 30-minute interval.
As shipped from the factory, the available logging intervals for LOG 1
mode are 1 second, 1 minute, 5 minutes, 15 minutes, and 30 minutes. Use
the TRAKPRO data analysis software to alter these values.
Programming the Logging Intervals Using TRAKPRO
To program the list of logging intervals available for LOG 1 mode:
1.
Make sure the Q-TRAK is connected to the computer and turned on.
2.
Select Parameters, then Logging Intervals from the Instrument
Setup menu. TRAKPRO retrieves the current logging intervals from the
Q-TRAK and displays them in the following dialog:
Operation
13
3.
Enter a value for each of the five available logging intervals (the range
is from 1 second to 59 minutes and 59 seconds).
4.
Select Send.
The Q-TRAK is reprogrammed to offer the logging intervals you have
specified.
é and ê Keys
The two arrow keys are used to adjust readings when calibrating the
Q-TRAK and for adjusting the time and date for the internal real-time clock.
Display/Keypad Lockout Switch
Recording data over extended time periods often requires leaving the
Q-TRAK unattended. To reduce the risk of having an unauthorized person
either intentionally or inadvertently interrupt the measurements, you can
lock the display and keypad.
This switch is located on the side of the Q-TRAK between the probe
mounting brackets. It is a small slide switch and is recessed so that a
pointed instrument must be used to move it.
The instrument case is labeled next to the switch with the symbols “I” and
“0.” With the switch in the “I” or on (up) position, all keypad and display
functions will work normally. There are two ways to use the lockout switch.
You can lock the keypad (move the switch to the “0” position) after
recording starts, or you can put the switch into the lockout position prior to
when recording starts. If you select the second method, you will be able to
operate all functions normally until the SAMPLE key is pressed in one of
the LOG modes. At that time the keypad will automatically lock. When the
display and keypad are locked, the display shows the words “RECORDING
LOG X ê” where “X” is the current LOG mode number.
Programming Advanced Modes: LOG 2 and LOG 3
Use LOG 2 or LOG 3 modes for unattended recording and setting user
protocols. With LOG 2 and LOG 3 modes you can set the start date, start
time, test length, logging interval, number of tests, and the time delay
between tests. All or selected parameters can be set.
14
Chapter 3
To program a protocol for LOG 2 or LOG 3 mode:
1.
Make sure the Q-TRAK is connected to the computer and turned on.
2.
Select Logging Setup from the Instrument Setup menu. TRAKPRO
retrieves the current settings for LOG 2 and LOG 3 modes from the
Q-TRAK and displays them in the following dialog:
The following table summarizes the information displayed in the
Advanced Logging Modes dialog box:
Serial Number
Number of tests
logged
Available
Memory (%)
Operation
Displays the serial number of the logging
instrument.
Displays the number of tests currently logged
and stored in the logging instrument.
Displays the percent of available memory in
the logging instrument.
15
LOG 2 and LOG 3 Mode Protocols
Channels
Start Date
Start Time
Log interval
Test length
Number of tests
Time between
tests
Percent
memory
required.
16
Displays the channels selected for sampling in
LOG 2 and LOG 3 modes.
Displays the start date for LOG 2 and LOG 3
modes.
Displays the start time for LOG 2 and LOG 3
modes.
Displays the log interval for LOG 2 and LOG
3 modes.
Displays the test length for LOG 2 and LOG 3
modes.
Displays the number of tests for LOG 2 and
LOG 3 modes.
Displays the time between tests for LOG 2
and LOG 3 modes.
Displays the percent of logger memory
required to perform a LOG 2 or a LOG 3
mode sample. To store the results of a LOG 2
or LOG 3 mode sample, the Available
Memory must be equal to or greater than the
Percent memory required.
Chapter 3
3.
Enter the following for LOG 2 and LOG 3 modes:
Channels
Start Date
Start Time
Select the channels for which you want to log
data. In the case of the Q-TRAK, there are four
channels to select: CO2, Temp, rh, and CO.
Enter the date and time to begin the sample:
•
If you enter a blank for a start date, the
sample begins whenever the specified
start time occurs.
•
Log interval
Test length
If you enter a blank for the start time, both
start date and start time are ignored, and
the sample begins when the operator
manually starts the sample.
Enter the log interval to use for the test.
Enter the length for the sample:
•
If you enter a value, the instrument
automatically turns off when the last test
is complete.
•
Number of tests
Time between
tests
If you enter a blank, the operator must
manually stop the sample.
Enter the number of tests to perform.
If you have specified more than one Number
of tests, enter the time between tests. If you
enter 0 or blank, the next test is started
immediately after the last test is complete.
While you are entering values for LOG 2 and LOG 3 modes, the
Percent Memory Required is dynamically updated to show the
amount of logger memory required to take the programmed sample. If
the protocol you have defined requires more than 100% of memory, you
can decrease the amount of memory required by manipulating the
following protocol parameters:
• Increase the logging interval.
• Decrease the length for the test.
• Decrease the number of tests.
• Decrease the number of channels.
The settings for each LOG mode must not require more than 100% of
the logger memory. Note also that if the Percent memory required is
greater than the Available memory, the logging instrument
automatically stops the test when memory is full.
Operation
17
4.
When you have finished defining the parameters for LOG 2 and LOG 3
modes, select Send.
5.
You can now disconnect the Q-TRAK and cable from the computer.
Sample Protocol for LOG 2 and LOG 3 Modes
The following steps describe how to program a sample protocol for LOG 2
or LOG 3 mode.
The sample protocol for LOG 2 is set to take unattended readings for one
day, 3/23/98. The logging sample begins at 8:00 a.m. and continues for
8 hours.
The sample protocol for LOG 3 is set up to take unattended readings for two
days, beginning on 3/24/98. The logging sample begins at 8:00 a.m. and
continues for 8 hours. The instrument is off for 16 hours, and then repeats
the 8 hours test on the following day.
The following graphic gives the appearance of the dialog box displayed in
TRAKPRO, with these particular logging parameters.
To program this logging example, do the following:
1.
18
Make sure the Q-TRAK is connected to the computer and turned on.
Chapter 3
2.
Select Logging Setup from the Instrument Setup menu. TRAKPRO
retrieves the current settings for LOG 2 and LOG 3 modes from the
Q-TRAK and displays them in the previous dialog.
3.
Enter the following for LOG 2 and LOG 3:
Setting
Channels
Start Date
Start Time
Log interval
Test length
Number of tests
Time between
tests
LOG 2
CO2, Temp, rh, CO
03/23/1998
08:00
01:00
00:08:00
1
00:00:00
LOG 3
CO2, Temp, rh, CO
03/24/1998
08:00
05:00
00:08:00
2
00:16:00
4.
Select Send. The logging instrument is programmed for the mode 2
and mode 3 protocols.
5.
Note that the LOG 2 test requires 3% of the available memory and
LOG 3 requires 1% of the memory. A total of 98% of the memory is
available for use.
6.
You can now disconnect your Q-TRAK from the computer. Refer to
other sections of this Operation and Service Manual for details on
making measurements using LOG 2 and LOG 3 modes.
After programming the Q-TRAK with the TRAKPRO Data Analysis Software,
take the Q-TRAK to the desired location and turn it on. Put it into LOG 2 or
LOG 3 mode (whichever you programmed) using the SAMPLING MODE
key. Press the SAMPLE key to initiate the program.
If you have set a start time and/or date, the display toggles between the next
“TEST ID” and the “ELAPSED TIME 0” message. If the test start time is
greater than one minute away, the Q-TRAK shuts off until one minute before
the test start time. This indicates that the Q-TRAK is waiting until the
programmed start time and dates occur. You may want to lockout the
display and keypad at this time to prevent tampering.
Things You Should Know About Taking Pre-Programmed
Samples
If you press the SAMPLE key during programmed recording, the
program terminates (unless the keypad is locked).
If the programmed start time and date has already passed, pressing the
SAMPLE key has no effect. The program never executes.
Operation
19
Setting the start time but no start date causes the Q-TRAK to start at the
specified time regardless of the date.
If no start time is set, the Q-TRAK waits for you to press the SAMPLE key
and starts sampling immediately.
If no test length is set, the Q-TRAK samples continuously until the
SAMPLE key is pressed to stop sampling or until the memory is full.
When a pre-programmed test ends, the Q-TRAK automatically shuts off.
When it is turned on again, it will be in Survey mode.
Memory Considerations
The Q-TRAK has a great deal of memory and you will not normally have to
be concerned with running out. The Q-TRAK has 128,000 bytes of internal
memory. This should be considered when selecting a logging interval.
Shorter logging intervals use memory more quickly than longer intervals.
A recorded data set consumes 6 bytes for Model 8550 and 8 bytes for
Model 8551 (2 each for CO2, CO, temperature and humidity.) In addition,
each test (labeled with a TEST ID number) needs 100 bytes for storing
statistics and setup information. (The formulas below ignore this 100 bytes
to keep the calculations simpler.) Based on this information, the Q-TRAK is
capable of storing approximately 21,000 data sets for Model 8550 and
15,750 for Model 8551:
Note: LOG 2 and LOG 3 modes can be programmed to record any of the
measurements separately, i.e., only CO2, or CO2 and temperature
but not humidity, etc. If only one measurement is recorded, up to
63,000 data points could be stored. The discussion below assumes
four measurements are recorded.
Max Data Points ≈
128,000
= 16,000
8
Therefore 1% of memory is about 160 data sets. The maximum possible
duration of a data logging session is determined by the logging interval and
the available memory. The equation below can be used to determine any
memory, recording time or logging interval restraints.
% Memory ≈
[ Elapsed Time ]
[160]×[Logging Interval]
(Note: Elapsed Time and Logging Interval are in units of minutes.)
20
Chapter 3
Chapter 4
Calibration and Maintenance
The Q-TRAK requires very little maintenance to keep it performing well.
The Q-TRAK may be calibrated in the field using the instructions below.
Even so, we recommend that you return your Q-TRAK to TSI for calibration
annually. For a reasonable fee, we will quickly clean and recalibrate the
unit, update software and firmware, and return it to you in “as new”
working condition along with a Certificate of Calibration and NIST
Traceability. The factory calibration is more precise than can be
accomplished with the procedures below. This “annual checkup” helps
ensure that the Q-TRAK is always in good operating condition.
Calibrating the CO2 Concentration Measurement
TSI recommends calibrating the Q-TRAK CO2 measurement monthly to help
ensure accurate readings. The CO2 concentration measurement is affected
by changes in atmospheric pressure. Normal day-to-day variations due to
local weather conditions have little effect. However, changes in altitude can
cause more significant errors. For best accuracy, calibrate the Q-TRAK CO2
measurement for your local conditions or if conditions change.
To calibrate the CO2 sensor, please follow the procedure below. Brief
instructions can also be found on the calibration collar itself. You will need
a cylinder of pure air or nitrogen for the zero calibration and a cylinder of
gas with a known concentration of CO2 for the span calibration. Contact
your local TSI distributor for available CO2 calibration kits.
Note: If using air for calibration, it must be specified to have less than
10 ppm CO2. Ambient room air cannot be used.
If necessary, you can select between the factory CO2 calibration and a user
calibration. Please refer to Appendix B: “Internal DIP Switch Settings.”
The calibration procedure can be aborted at any time by pressing the CO2,
TEMP, or HUMIDITY key.
If an error occurs during the CO2 calibration procedure, the Q-TRAK
displays the message “ERR.” Press the CO2, TEMP, or HUMIDITY key to
abort the calibration. Switching the zero gas with the span gas is an
example of a condition that causes the “ERR” message to come on.
21
1.
Locate the calibration collar and slide it over the sensing probe. Make
sure that the collar completely covers the CO2 diffusion holes. Refer to
Figure 4–1.
Figure 4–1: CO2 Calibration
2.
Install the regulator onto the zero calibration gas cylinder and connect
tubing from the cylinder to the fitting marked “GAS IN” and turn the
gas on (0.3 L/min). Make sure the cylinder is not empty. It should
quietly “hiss” when it is on.
3.
To put the Q-TRAK into CO2 calibration mode, first put the instrument
into Survey mode, and then press and hold the CO2 key. The display
begins to count down from five to zero. When the count reaches zero,
release the CO2 key immediately. The words “CALIBRATE ZERO”
should appear on the display. If not, try again.
Note: DIP switch 2 must be set to the “User Calibration” (ON) position
or the Q-TRAK will not go into CO2 calibration mode. Please refer
to Appendix B: “Internal DIP Switch Settings.”
4.
22
Press the SAMPLE key to take a zero measurement. The Q-TRAK will
display a 60-second count-down. When the count-down is completed,
the display shows the word “CALIBRATE 1,” the next span
concentration (typically 1000 ppm), and the arrow symbols (éê) will
be blinking. Turn off the regulator and disconnect the zero calibration
gas.
Chapter 4
5.
Install the regulator onto the span calibration gas cylinder and attach a
tube from cylinder to the fitting marked “GAS IN.” Make sure the
cylinder is not empty, then turn the gas on (0.3 L/min). A CO2
concentration of between 1000 and 5000 ppm should be used.
6.
Use the arrow (éê) keys on the Q-TRAK keypad to adjust the display
to match the known span gas concentration. Press quickly and release
the arrow key to change the display 1 ppm at a time. Hold the arrow
key down to move more quickly. The span gas concentration value
(ppm) is marked on the gas container.
7.
Press the SAMPLE key to take a span reading. The Q-TRAK will
display a 60-second count-down. When the count-down reaches zero
the Q-TRAK will go into Survey mode. Turn the instrument off.
8.
Turn the instrument on and observe the reading displayed on the
Q-TRAK. It should be very close to the span gas concentration (within
specifications: See Appendix A). If not, repeat the calibration.
9.
If the displayed reading is accurate, turn the gas off and remove the
calibration collar and regulator. The calibration is now completed.
Calibrating the Temperature or Relative Humidity Measurement
To perform a temperature or humidity calibration on the Q-TRAK you will
need a reference temperature or humidity device, preferably one that is more
accurate than the Q-TRAK. To obtain the best accuracy, care must be taken
so that both the Q-TRAK probe and the reference device are able to sense the
same air. Also, it’s best to calibrate at a temperature and humidity that is
near the range you typically measure. In most cases this will be room
temperature.
!
Caution
Never submerge the probe or Q-TRAK in water or any
other liquid. The sensor will be damaged.
If necessary, you can select between the factory calibration and a user
calibration. Please refer to Appendix B: “Internal DIP Switch Settings.”
1.
Locate the Q-TRAK probe and the reference device sensor so that they
“see” the same air conditions.
2.
To put the Q-TRAK into calibration mode, first put the instrument into
Survey mode and then press and hold the key, TEMP or HUMIDITY,
that you wish to calibrate. The display begins to count down from five
to zero. When the count reaches zero, release the key immediately. The
word “CALIBRATE” should appear on the display along with blinking
arrow symbols (éê). If not, try again.
Calibration and Maintenance
23
Note: DIP switch 3 or 4 must be set to the “User Calibration” (ON)
position or the Q-TRAK will not go into calibration mode. Please
refer to Appendix B: “Internal DIP Switch Settings.”
3.
Compare the reading on the Q-TRAK with the reading from the
reference device. If they differ, use the arrow keys (éê) on the
Q-TRAK to adjust the Q-TRAK display as needed so that the displayed
measurement matches the measurement indicated by the reference
device. Press the arrow key briefly to change the display 0.1 degree or
0.1% at a time. Hold the arrow key down to change more quickly.
Note: If the two readings are the same, there is no need to proceed with
the calibration. Press the CO2, TEMP, or HUMIDITY key to
terminate the calibration procedure.
4.
Press the SAMPLE key to take a measurement. The Q-TRAK will
display a 15-second count-down. When the count-down is completed,
the Q-TRAK will go back to survey mode.
5.
Observe the displayed reading on the Q-TRAK, it should agree with the
reference device within specifications (see Appendix A). If not, repeat
the calibration.
6.
If the displayed reading is accurate, the calibration is completed.
Calibrating the CO Concentration Measurement (Model 8551
only)
TSI recommends calibrating the Q-TRAK CO measurement monthly to help
ensure accurate readings. The CO concentration measurement is affected by
changes in temperature and atmospheric pressure. Normal day-to-day
variations due to local weather conditions have little effect. However,
changes in altitude can cause more significant errors. For best accuracy,
calibrate the Q-TRAK CO measurement for your local conditions or if
conditions change.
To calibrate the CO sensor, follow the procedure below. You will need a
cylinder of pure air for the zero calibration and a cylinder of gas with a
known concentration of CO for the span calibration, 35 ppm or 200 ppm is
recommended. Contact your local TSI distributor for available CO
calibration kits.
Note: Calibration with CO gas should always be done in a well-ventilated
area.
If necessary, you can select between the factory CO calibration and a user
calibration. Please refer to Appendix B: “Internal DIP Switch Settings.”
24
Chapter 4
The calibration procedure can be aborted at any time by pressing the CO,
CO2, TEMP, or HUMIDITY key.
If an error occurs during the CO calibration procedure, the Q-TRAK will
display the message “ERR.” Press the CO, CO2, TEMP, or HUMIDITY key
to abort the calibration. Switching the zero gas with the span gas is an
example of a condition that will cause the “ERR” message to come on.
Figure 4–2: CO Calibration
1.
Locate the calibration adapter and slide it over the sensing probe. Make
sure that the adapter completely covers the CO diffusion holes at the tip
of the probe.
2.
Install the regulator onto the zero calibration gas (must contain 02, e.g.,
zero air) cylinder and connect tubing from the cylinder to the inlet of
the calibration adapter and turn the gas on (0.3 L/min). Make sure the
cylinder is not empty.
3.
To put the Q-TRAK into CO calibration mode, first put the instrument
into Survey mode, and then press and hold the CO key. The display
begins to count down from five to zero. When the count reaches zero,
release the CO key immediately. The words “CALIBRATE ZERO”
should appear on the display. If not, try again.
Note: DIP switch 7 must be set to the “User Calibration” (ON) position
or the Q-TRAK will not go into CO calibration mode. Please refer to
Appendix B: “Internal DIP Switch Settings.”
4.
Press the SAMPLE key to take a zero measurement. The Q-TRAK will
display a 90-second count-down. When the count-down is completed,
the display shows the word “CALIBRATE 1” and the arrow symbols
(éê) will be blinking. Turn off the regulator and disconnect the zero
calibration gas.
Calibration and Maintenance
25
5.
Install the regulator onto the span calibration gas cylinder and attach a
tube from cylinder to the inlet fitting of the calibration adapter. Make
sure the cylinder is not empty, then turn the gas on.
6.
Use the arrow (éê) keys on the Q-TRAK keypad to adjust the display
to match the known span gas concentration. Quickly press and release
the arrow key to change the display 1 ppm at a time. Hold the arrow
key down to move more quickly. The span gas concentration value
(ppm) should be marked on the gas container.
7.
Press the SAMPLE key to take a span reading. The Q-TRAK will
display a 90-second count-down. When the count-down reaches zero
the Q-TRAK will go into Survey mode.
8.
Observe the reading displayed on the Q-TRAK. It should be very close to
the span gas concentration (within specifications: see Appendix A). If
not, repeat the calibration.
9.
If the displayed reading is accurate, turn the gas off and remove the
calibration adapter. The calibration is now completed.
Replacing the CO Sensor
The electro-chemical CO sensor will need to be replaced approximately
once a year. Conditions that may indicate a sensor needs to be replaced are:
1) the sensor will not hold calibration, or 2) the response is very unstable.
Caution must be taken when operating at very low or high temperatures.
Exposing the sensor to sub-freezing temperatures can cause permanent
damage to the sensor. Exposing the sensor to high temperature for long
periods of time can cause the sensor to dry out which will shorten the sensor
life. The sensor has a built in filter to eliminate interfering gasses. This
filter will last the life of the sensor under normal background gas levels. To
replace the sensor follow the procedure below.
!
WARNING
The CO sensor contains a corrosive material, avoid
contact with eyes and skin.
1.
Unscrew cap from end of probe.
2.
Carefully bend flex circuit assembly away from old CO sensor.
3.
Remove old sensor by gently pulling sensor straight off the end of the
probe. Do not twist the sensor, this will damage the connector.
4.
Obtain a new sensor, tear open foil pouch, and remove new sensor.
Inspect new sensor for visible signs of damage or leakage. Discard old
sensor.
26
Chapter 4
5.
Line up notch on sensor with connector and gently push sensor onto the
connector.
6.
While holding flex circuit against CO sensor, carefully thread
thermistor through cap and screw cap on probe.
7.
Turn on Q-TRAK. A one-time, 30-minute stabilization period is needed
only after sensor replacement. After the stabilization period, calibrate
the sensor by following the procedure above.
Storage Precautions
When storing the Q-TRAK for more than 30 days, you should remove the
batteries. This prevents damage due to battery leakage.
This instrument must be stored in a location where the temperature remains
between -20 and 60°C (-4 and 140°F) and the relative humidity between
15% and 90%.
Calibration and Maintenance
27
(This page intentionally left blank.)
28
Chapter 4
Chapter 5
Troubleshooting
The table below list the symptoms, possible causes and recommended
solutions for common problems encountered with the Q-TRAK.
Symptom
No Display.
Possible Cause
Unit not switched on.
Corrective Action
Switch unit on.
Low or dead batteries.
Replace the batteries or plug in
the AC adapter.
Disable lockout switch
Lockout switch enabled
Battery
symbol is
displayed
(constant or
blinking).
Display
reads
“MEMORY
0%.”
Humidity
reading near
zero or not
believable.
Cannot enter
calibration
mode.
Incorrect
function
displayed.
Dirty battery contacts.
Low battery charge.
Clean the battery contacts.
Replace batteries or use AC
Adapter.
Incorrect AC Adapter.
Replace with the correct AC
Adapter.
Low AC line Voltage.
Correct the AC line voltage or
use batteries.
Dirty battery contacts.
Memory is full.
Clean the battery contacts.
Download memory to a PC if
desired, then clear memory.
Probe exposed to intense
light.
Shade the probe while taking
samples.
DIP switch(s) set to
factory calibration.
Change DIP switch setting. See
Appendix B.
Not in Survey mode.
Change to Survey mode.
Sample is in progress.
Two keys have been
pressed at the same time.
Stop sample in progress.
Press only one key at a time.
29
Symptom
No keypad
response.
“ERR”
Displayed
during
calibration
procedure.
“SERVICE”
and “1”
displayed.
“SERVICE”
and “2”
displayed.
“SERVICE”
and “3”
displayed.
“SERVICE”
and “4”
displayed.
“SERVICE”
and “5”
displayed.
“SERVICE”
and “6”
displayed.
“SERVICE”
and “7”
displayed.
“SERVICE”
and “8”
displayed.
30
Possible Cause
Display/Lockout switch in
lockout position.
A mistake has been made
such as switching the
zero and span gases.
Corrective Action
Slide lockout switch to normal
position.
Press CO2, TEMP or
HUMIDITY key to abort
calibration. Review instructions
and try again.
Memory has been cleared
due to temporary loss of
power from internal
backup battery.
Calibration memory
error. Internal calibration
data corrupted.
Temperature sensor
malfunction.
Factory service required if
condition persists. Press any
key to bypass.
CO2 sensor malfunction.
Factory service required. Press
any key to bypass.
Humidity sensor
malfunction.
Factory service required. Press
any key to bypass.
Low batteries are the
most common cause of
this error.
Replace batteries or operate
with AC adapter. Press any key
to clear error. Turn instrument
off/on.
If error persists, infrared
light source malfunction
may have occurred.
Backup battery low.
Factory service required to
replace light source. Press any
key to bypass error.
Factory service required . Press
any key to bypass.
CO sensor not detected.
Check that CO sensor is
properly installed.
CO signal out of range.
Recalibrate CO sensor.
CO sensor malfunction.
Replace and recalibrate CO
sensor. Factory service possibly
required. Press any key to
bypass.
Factory service required.
Factory service required. Press
any key to bypass.
Chapter 5
Appendix A
Specifications
Specifications are subject to change without notice.
Specifications in parentheses () indicates English equivalents.
CO2:
Sensor type:............................ Non-Dispersive Infrared (NDIR)
Range: .................................... 0-5000 ppm
Accuracy: ................................ ±3% of reading ±50 ppm at 25°C
(77°F). [Add uncertainty of
±0.36% per °C (±0.2% of reading per
°F) for change in temperature.]
Resolution:.............................. 1 ppm
Response time: ....................... 20 seconds (for 63% of final value
for 500 ppm step change)
Temperature:
Sensor type:............................
Range: ....................................
Accuracy: ................................
Resolution:..............................
Response time: .......................
Thermistor
0 to 50 °C (32 to 122 °F)
±0.6 °C (1.0 °F)
0.1 °C (0.1 °F)
30 seconds (90% of final value, air
velocity at 2 m/s)
Display units:........................... °C or °F (user selectable)
Humidity:
Sensor type:............................
Range: ....................................
Accuracy: ................................
Resolution:..............................
Response time: ......................
Thin-film capacitive
5 to 95 %rh
±3 %rh (includes ±1% hysteresis.)
0.1 %rh
20 seconds (for 63% of final value)
CO (Model 8551 only):
Sensor type:............................ Electro-chemical
Range: .................................... 0–500 ppm
Accuracy: ................................ ± 3% of reading or 3 ppm whichever
is greater [add ±0.5%/°C (0.28%/°F)
away from calibration temperature]
Resolution: .............................. 1 ppm
Repeatability: .......................... ± 2% of reading
Response time: ....................... < 60 seconds to 90% of final value
31
Instrument Temperature Range:
Operating range: ..................... 5 to 45 °C (41 to 113 °F)
Storage range: ........................ -20 to 60 °C (-4 to 140 °F)
Time Constant:
Range: .................................... Adjustable from 2 to 60 seconds
Data Logging:
Data points:............................. 63,000 (14 days of logging
simultaneous CO2, Temperature,
and Humidity at 1-minute intervals).
Logging interval: ..................... User adjustable from 1 second to
1 hour
Power Requirements:
Batteries:................................. Four AA-size Alkaline or NiCd
or
AC adapter:............................. 6 VDC nominal, 300 ma, [Q-TRAK
mates with 5.5 mm OD x 2.1 mm ID
plug, center pin positive(+)]
Approx. battery Life:................ 13.5 hours (Alkaline), 4.75 hours
(NiCd)
Physical:
External dimensions:............... 107 mm x 183 mm x 38 mm
(4.2 in x 7.2 in x 1.5 in)
Probe length:........................... Model 8551: 17.8 cm (7.0 in)
Model 8550: 14.7 cm (5.8 in)
Probe diameter: ...................... 1.9 cm (0.75 in)
Weight: ................................... 0.59 kg (1.3 pounds) (with batteries)
Display:................................... 4-digit LCD, 15 mm (0.6 in) digit
height
Maintenance Schedule:
Factory calibration:.................. Annually
User calibration: ...................... As needed
Serial Interface:
Type: ......................................
BAUD rate: .............................
Data bits:.................................
Stop bits:.................................
Handshaking: ..........................
Data format:............................
32
RS-232
1200
8
1
None
ASCII
Appendix A
Calibration Gas
CO2 zero: ................................
CO2 span: ...............................
CO zero: .................................
CO span:.................................
Gas flow rate:..........................
Specifications
Nitrogen or pure air (<10 ppm CO2)
1000–5000 ppm CO2
Pure air (<0.5 ppm CO)
35–500 ppm CO
0.3 to 0.5 L/min
33
(This page intentionally left blank.)
34
Appendix A
Appendix B
Internal DIP Switch Settings
To access the DIP switches, remove the batteries from the battery
compartment. On the inside of the battery compartment, there is a window
with eight DIP switches The table below shows the functions for each
switch. Please refer to Figure B–1 for switch locations.
!
Caution
Make certain that power is turned off before changing
DIP switch settings.
Switch OFF
ON
1
Degrees Celsius (°C)
Degrees Fahrenheit (°F)
2
Factory CO2 Cal.
User CO2 Cal.*
3
Factory Temp. Cal.
User Temp. Cal.*
4
Factory Humidity Cal.
User Humidity Cal.*
5
Beep Disabled
Beep Enabled
6
Reserved
Reserved
7
Factory CO Cal.
User CO Cal.*
8
Reserved
Reserved
* As shipped the user calibration is identical to the factory calibration
- Factory default settings are indicated with BOLD type.
- The ON position is away from the batteries and OFF is towards the
batteries.
- Switch 1 is towards the display and switch 8 is nearest to the data port.
35
ON
OFF
1
8
DIP SWITCH
Figure B–1: DIP Switch Location
36
Appendix B
®
TSI Incorporated
Download PDF