TSI IAQ-Calc™ Indoor Air Quality Meter

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Copyright and Legal Information

Copyright

Copyright© TSI Incorporated / 2007–2022 / All rights reserved.

Address

TSI Incorporated / 500 Cardigan Road / Shoreview, MN 55126 / USA

Fax No.

(651) 490-3824

Limitation of Warranty and Liability (effective February 2016)

Seller warrants the goods, excluding software, sold hereunder, under normal use and service as described in the operator's manual, to be free from defects in workmanship and material for twenty-four (24) months, or the length of time specified in the operator's manual, from the date of shipment to the customer. This warranty period is inclusive of any statutory warranty. This limited warranty is subject to the following exclusions:

• 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.
• 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.
• 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.
• This warranty does not cover calibration requirements, and seller warrants only that the instrument or product is properly calibrated at the time of its manufacture. Instruments returned for calibration are not covered by this warranty.
• This warranty is VOID if the instrument is opened by anyone other than a factory authorized service center with the one exception where requirements set forth in the manual allow an operator to replace consumables or perform recommended cleaning.
• This warranty is VOID if the product has been misused, neglected, subjected to accidental or intentional damage, or is not properly installed, maintained, or cleaned according to the requirements of the manual. 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 modified by 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 THE CASE OF SOFTWARE, SELLER WILL REPAIR OR REPLACE DEFECTIVE SOFTWARE OR IF UNABLE TO DO SO, WILL REFUND THE PURCHASE PRICE OF THE SOFTWARE. IN NO EVENT SHALL SELLER BE LIABLE FOR LOST PROFITS, BUSINESS INTERRUPTION, OR ANY SPECIAL, INDIRECT, 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 (800) 874-2811 (USA) or (1) 651-490-2811 (International).

Trademarks

TSI and TSI logo are registered trademarks of TSI Incorporated in the United States and may be protected under other country's trademark registrations. LogDat2 is a trademark of TSI Incorporated.

Chapter 1: Unpacking and Parts Identification

Carefully unpack the instrument and accessories from the shipping container. Check the individual parts against the list of components below. If anything is missing or damaged, notify TSI® immediately.

Components:

• Carrying case
• Instrument
• USB cable
• CD-ROM with downloading software (also available for download from tsi.com website)
• Calibration collar
• AC adapter

Chapter 2: Setting-up

Supplying Power to the Model 7525 IAQ-Calc™ Indoor Air Quality Meter

The Model 7525 can be powered in one of two ways: four size AA batteries or the 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 7525 is designed to operate with either alkaline or NiMH rechargeable batteries, although it will not recharge NiMH batteries. Battery life will be shorter if NiMH batteries are used. Carbon-zinc batteries are not recommended because of the danger of battery acid leakage.

Using the Optional AC Adapter

When using the AC adapter, the batteries (if installed) will be bypassed. Be sure to provide the correct voltage and frequency, which is marked on the back of the AC adapter. The AC adapter is not a battery charger.

Using the 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. Humans exhale CO2 levels exceeding 10,000 ppm and it may take time for the probe to re-stabilize. Use the probe holder to support the probe when in continuous data logging mode.

Connecting to a Computer

Use the USB Cable provided with the Model 7525 to connect the instrument to a computer. For more information on how to download stored data see Chapter 3 section titled LogDat2™ Downloading Software.

Chapter 3: Operation

Keypad Functions

Common Terms

In this manual there are several terms that are used in different places. The following is a brief explanation of the meanings of those terms.

Menus

DISPLAY SETUP

Display setup menu is where you will setup the desired parameters to be displayed on the running screen. With a parameter highlighted you can then use the ON soft key to have it show up on the running screen or select the OFF soft key to turn off the parameter. Use PRIMARY soft key to have a parameter show up on the running screen in a larger display. Only one parameter can be selected as a primary, and up to 2 secondary parameters can be selected at one time.

SETTINGS

Settings menu is where you can set the general settings. These include Language, Beeper, Select Units, Time Constant, Contrast, Set Time, Set Date, Time Format, Date Format, Number Format, Backlight and Auto Off. Use the ◄ or ➤ soft keys to scroll through the settings for each option and use the ↵ key to accept settings.

BAROMETRIC PRESSURE

Barometric Pressure menu is where you set the barometric pressure, which can affect the CO2 measurement.

DATA LOGGING

Measurements

Measurements to be logged are independent of measurements on the display, and must therefore be selected under DATA LOGGING → Measurements.

Log Mode/Log Settings

You can set Log Mode to Manual, Auto-save, or Cont-key.

• Manual mode does not automatically save data, but instead prompts the user to save a sample.
• In Auto-save mode, the user manually takes samples that are automatically logged.

• In Cont-key mode, the user starts taking readings and logging by pressing the ↵ key. The instrument will continue taking measurements until the ↵ key is pressed again.
• Auto-save and Cont-Key modes have the following additional Log Settings:

  Mode	Log Settings
  Auto-save	Log Interval
  Cont-key	Log Interval

• Pressing the ▲▼ keys simultaneously will lock the keypad to prevent unauthorized adjustments to the instruments. To unlock the keypad, press the ▲▼ keys simultaneously.

Delete Data

Use this to delete all data, delete test or delete sample.

% Memory

This option displays the memory available. Delete All, under Delete Data, will clear memory and reset the memory available.

APPLICATIONS

You can choose % Outside Air in the Applications menu. After choosing this application, take measurements or enter data for each line.

LogDat2™ Downloading Software

The Model 7525 comes with special software called LogDat2™ Downloading Software, which is designed to provide you with maximum flexibility and power. To install this software on your computer, follow the instructions on the label of the LogDat2™ CD-ROM.

You can also download LogDat2™ software from the tsi.com website in the Service/Support page under Software. Once downloaded onto your PC, click the application file to begin installation. Follow the on-screen instructions to install the software.

To download data from the Model 7525, connect the supplied computer interface USB cable to the Model 7525 and to a computer USB port. Then run the LogDat2™ downloading software. Within the LogDat2™ software, either select the tests to be downloaded or double-click on a test to open it.

Chapter 4: Maintenance

The Model 7525 requires very little maintenance to keep it performing well.

Recalibration

To maintain a high degree of accuracy in your measurements, TSI® recommends that you return your Model 7525 to TSI® for annual recalibration. Please contact one of TSI's offices or your local distributor to make service arrangements and to receive a Service Request number. To fill out an online “Service Request" form, visit TSI® Incorporated's website at tsi.com/service.

U.S. & International Contact Information:

TSI Incorporated
500 Cardigan Road
Shoreview MN 55126-3996
Tel: (800) 680-1220
(651) 490-2860
Fax: (651) 490-3824

The Model 7525 can also be recalibrated in the field using the CALIBRATION menu. These field adjustments are intended to make minor changes in calibration to match a user's calibration standards. The field adjustment IS NOT intended as a complete calibration capability. For complete, multiple-point calibration and certification, the instrument must be returned to the factory.

Cases

If the instrument case or storage case needs cleaning, wipe it off with a soft cloth and isopropyl alcohol or a mild detergent. Never immerse the Model 7525. If the enclosure of the Model 7525 or the AC adapter becomes broken, it must be replaced immediately to prevent access to hazardous voltage.

Storage

Remove the batteries when storing the unit for more than one month to prevent damage due to battery leakage.

Chapter 5: Troubleshooting

Table 5-1 lists the symptoms, possible causes, and recommended solutions for common problems encountered with the Model 7525. If your symptom is not listed, or if none of the solutions solves your problem, please contact TSI®.

Table 5-1: Troubleshooting the Model 7525

WARNING! Remove the probe from excessive temperature immediately: excessive heat can damage the sensor. Operating temperature limits can be found in Appendix A, Specifications.

Appendix A: Specifications

Specifications are subject to change without notice.

CO2:

• Range: 0 to 5000 ppm
• Accuracy¹: ±3% of reading or ± 50 ppm, whichever is greater
• Resolution: 1 ppm
• Sensor type: Non-Dispersive Infrared (NDIR)

Temperature:

• Range: 32 to 140°F (0 to 60°C)
• Accuracy²: ±1.0°F (±0.6°C)
• Resolution: 0.1°F (0.1°C)
• Response time: 30 seconds (90% of final value, air velocity at 2 m/s)
• Display units: °F or °C (user selectable)
• Type: Thermistor

Humidity:

• Range: 5 to 95% RH
• Accuracy³: ±3% RH (includes ±1% hysteresis)
• Resolution: 0.1% RH
• Response time: 20 seconds (for 63% of final value)
• Sensor type: Thin-film capacitive

Instrument Temperature Range:

• Operating (Electronics): 40 to 113°F (5 to 45°C)
• Storage: -4 to 140°F (-20 to 60°C)

Instrument Operating Conditions:

• Altitude up to 4000 meters
• Relative humidity up to 80% RH, non-condensing
• Pollution degree 1 in accordance with IEC 664
• Transient over voltage category II

Data Storage Capabilities:

• Range: 30,300 data points with key (3) measured parameters enabled

Logging Interval:

• Intervals: 1 second up to 1 hour (user selectable)

Time Constant:

• Intervals: User selectable

External Meter Dimensions:

3.3 in. x 7.0 in. × 1.8 in. (8.4 cm x 17.8 cm × 4.4 cm)

Meter Probe Dimensions:

• Probe Length: 7.0 in. (17.8 cm)
• Probe Diameter of Tip: 0.75 in. (1.9 mm)

Meter Weight:

• Weight With Batteries: 0.6 lbs (0.27 kg)

Power Requirements:

Four AA-size batteries (included) or AC adapter (optional) 9 VDC, 300 mA, 4-18 watts (input voltage and frequency vary depending on which adapter is used)

¹ Add ±0.2%/°F (±0.2%/°C) away from calibration temperature.

² At 77°F (25°C). Add uncertainty of ±0.2%/°F (±0.2%/°C) away from calibrated temperature.

³ At 77°F (25°C). Add uncertainty of ±0.03% RH/°F (±0.03% RH/°C) away from calibrated temperature.