Airflow Systems IAQ50 manual

Indoor Air Quality Meter Model IAQ50 OWNER’S MANUAL[...]

ii LI MI T A T I ON OF W AR R AN T Y AN D L I AB I L IT Y Seller warrants th e goods sold hereu nder, under norm al use and service as described in the operator's manual, shall be f ree from defects in wor kmanship and mater ial for twenty-four (24) m onths, or the length of time specified in t he operator's m anual, from the date of ship[...]

3 Table of Contents LIMITATION OF WARRANTY AND LIABILITY ................................................................... ii SECTION 1 General Descript ion ................................. 5 SECTION 2 Sa fety ........................................................... 6 SECTION 3 Setting-U p .................................................. 7 [...]

4 SECTION 5 Maintena nce ............................................ 2 6 Probe Tip ..................................................................... 26 Cases ............................................................................ 27 Storage ......................................................................... 27 SECTION 6 Service and [...]

5 SECTION 1 General Description The Model IAQ50 measures Carbon Dioxide (CO 2 ) level, t emperature an d relative humidity, and calculates dew point and wet bulb. It also calcul ates the percentage of outside (make up) air in a given indoor space, using CO 2 levels, or temperature. The instrument will deter- mine statistic s and recall individual d[...]

6 SECTION 2 Safety When using the IAQ50 to check for CO 2 , temperature or humi dity values, make certain that y ou can safely raise and hol d the instrument while m aking measure- ments. Be especially careful when wo rking on a ladder. Observe all necessary prec autions so that the unit does not become caught in moving machinery or touch any expos[...]

7 SECTION 3 Setting-Up Supplying Po wer to the Model IAQ50 The Model IAQ50 can be powered in one of two ways: four AA-size batteries or an optional AC ad apter. 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 bat[...]

8 Start up Sequence for the Model IAQ50 When the instrument is turned on, all segments of the display wi ll light up and then the meter goes through a start-up sequence. Battery Percentage This shows the remainin g amount of battery power. Log Percentage This shows how much of t he datalog- ging memory is sti ll availa ble. Baud Rate The Model IAQ5[...]

9 and time stamping of recorded data w ill 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 opportu- nity to view and/or change the minutes (min), hours, year, month and date in sequence. Use the 5 o[...]

10 sequence , press and ho ld the ENTER key at any point of the start-up sequence, until the meter b eeps. 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 CO 2 and it [...]

11 ON/OFF Key Press the ON/OF F key to turn the in- strument on and off. When the instru- ment is first turned on, it g oes through a preprogrammed power-up sequence that includes an internal se lf-check (when all display able items ar e shown). The Model IAQ50 begins by displaying percentage of battery life remaining (accurate for alkaline bat ter[...]

12 rameter, press the CO 2 key. Then, place the probe in the location you w ant to measure gas concentration. TEMP Key The meter will always d isplay tempera- ture readings from the permanent sensor on the lower line of the display. When you wish to take an external tempera- ture reading using an RTD probe, plug any three-pronged RTD probe into the[...]

13 HUMID Key Press HUMID to toggle between %RH, dew point or wet bulb, (as display ed on the top line of the display). Dew point and wet bulb are disp layed in the same units chosen for temperature measure- ment. READ/ENTER Key This is a dual function key. It reads measurement samples and it can be used to accept a value or condition or to return t[...]

14 TIME LOG Key To set up the instrument so it automati- cally takes measurements, use the TIME LOG key. This allows you t o program a logging time and i nterval, and the meter will read and store measur ements that can be viewed later. Press the TIME LOG key. Use the 5 or 6 keys to select “ On ”. Press the ENTER key. “ LOG ” will light up [...]

15 sen, the instrument will sample continu- ously until it is either stopped manually, runs out of memory, or the batteries run out. If a number between 1 and 9999 is chosen, the instrument will take that number of samples and then stop stor- ing readings. The instrument will then return to a normal measuring mode. Press ENTER to start the automati[...]

16 NEXT TEST Key Press NEXT TEST to advance to the next test ID. If the current test ID does not have anything stored, it will not advance to the next test ID. The Model IAQ50 w ill automatically increment the test ID number under the following conditions: • turning off the Model IAQ5 0 (if there is stored data) • setting any data logging sampl[...]

17 Using CO 2 : %OA= (C R –C S ) / (C R –C O ) x 100% where %OA = Percentage of outside air C R = Concentration CO 2 of return air C S = Concentration CO 2 of supply air C O = Concentration CO 2 of outside air Using Temper ature: %OA= (T R -T S ) / (T R -T O ) x 100% where %OA = Percentage of outside air T R = Temperature of return air T S = Te[...]

18 IMPORTANT: Temperature reading s sh ould be taken at the Air Handling Unit only, since there may be components in the system that chang e the temperature that are not evident upon initial examination. Calculating Outside Air measurements by taking reading s at the supply air to a room will not give the correct answer. Reheat coils and chille r c[...]

19 Details on the procedure ar e as follows: Press the %OA key once to begin. To choose a measurement mode ( OA , SUPPLY, RETURN ), use the 5 or 6 keys. You may press TEMP or CO 2 at any tim e to move from calculatin g %OA from TEMP to CO 2 or from CO 2 to TEMP. In return air mode, “ RETURN ” will appear on the di splay. The current va lue will[...]

20 If the measurement is not acceptable or the value is not yet stable, wait a minute and then take another reading to over - write the value on the top line. Once the top line value is acceptable, press the 5 or 6 keys to move the icon to either Supply or %OA, whichever reading you are prepared t o make next. Repeat the procedure with both a Sup- [...]

21 Note: “Err” will display if not enough information is available or a negative % value is calculated. To make changes to one of the other three readings without putting these values to memory yet, press the 5 or 6 keys to review the values and press READ/ENTER to overwrite the value. To exit this procedure completely with- out putting any val[...]

22 to change the value. Press ENTER to return to normal measurin g mode. RECALL Key The RECALL key lets yo u review data from a partic ular test ID . Press the RECALL key. The most curren t test ID number will show on the display. Press ENTER to review me asurements in this test ID, or use the 5 or 6 keys to choose another test ID to review. If das[...]

23 ments, press the desired measurement button. For example, if you wish to see humidity measurements, press HUMID . Press HUMID again to see d ew point readings. For the external RTD, press the TEMP key. If there is no data for that measurement type “- ----” will be dis- played. Press another meas urement key to view more data or press ENTER t[...]

24 them. Use the 5 or 6 key to adj ust the value, and press ENTE R to accept. DEL Key The Model IAQ50 lets yo u clear the last sample stored or the entire contents of memory. To clear only the last sample, hold the DEL key and the disp lay will begin a countdown from 3 to 0. Release the key befor e 0 is display ed. The display wil l beep twice and [...]

25 Printing Data Using the Optional MicroPrinter If the optional MicroPrinter is connected, what is viewed on-screen will be on the paper printout. Note : In order to print, the b aud rate on the Model IAQ50 must be set to the sa me as the printer. The default is 1200. The data will print in a format such as 12,345.67. If you desire, the Model IAQ5[...]

26 printer, please refer to the operation and service manual for the printer to properly set the printer’s DIP switch settings. If the printer prints question marks (??????), asterisks (******), or r andom characters, reset it by turn ing it off an d then on again. If necessary, refer to the Owner’s Manual for the MicroPrinter. SECTION 5 Mainte[...]

27 Cases If the instrument case or storage case needs cleaning, wipe it o ff with a soft cloth. Never submerge the Model IAQ50 in any liquid. Storage When storing the Model IAQ50 for more than a month, TSI recommends removing the batteries. This prevents possible damage due to battery leak age. SECTION 6 Service and Calibration Please return your P[...]

28 calibration, Return Ma terial Authoriza tion (RMA) number, and shipping instructions. Please have th e following informat ion available when you call : • Owner’s name, address, and phone number • Billing address, if different and applicable • Instrument name and model • Serial number • Date of purchase • Where purchased TSI recomme[...]

29 especially important in applications where strict calibration records must be main- tained. Send the instrument to TSI Instruments Ltd. prepaid. Securely pack age your instrument in a strong cont ainer sur- rounded by at least 5 cm of suitable shock- absorbing material. Inc lude a purch ase order that clearly shows the instrument model number an[...]

30 3. Turn the IAQ50 on. It will flash “CAL” on the top row and beep intermit- tently. 4. Press and hold the CO 2 key to begin the calibration procedure. The display will begin a co untdown from 5 to 0. Release the key when the display reads 0. If the key is released too soon or too late, the instrument will go back to beeping and flashing “C[...]

31 the display indicates “SPAN” and the span concentration. 9. Install the regulator on the span calibration cylinder and co nnect tub- ing from the regulator to the inlet fit- ting on the calibration collar. 10. Use 5 and 6 keys to adjust the concentration displa yed on the IAQ50 to match the concentration on the span gas cylinder. 11. Press a[...]

32 Temperature and Humidity Calibrations Adjustment Procedure The temperature adjustme nt can add or subtract a number of degr ees. The range is ±9.99ºF (±5. 55°C). Calib ration can be done in either ºF or ºC mode. H umidity adjust- ment adds or subtract s a constant percent- age. The range is ±12. 0% relative humidity. The procedure for fie[...]

33 it. When finished, turn the instrument o ff and flip DIP sw itch #7 to “off.” On the Model IAQ50, press and hold the TEMP or HUMIDITY key to enter the calibration m ode for that p arameter. To enter the calibration mode for the RTD, make sure the RTD is plugged in. Press the TEMP key until “Prb” shows on the display, then press and hold [...]

34 SECTION 7 Troubleshooting Table 7-1 lists the symptoms, possible causes, and recommended solutions for common problems encountered with the Model IAQ50. If your symptom is not listed, or if none of the corrective a ctions solve your problem, plea se contact TSI Instruments Ltd. Table 7-1: Troubleshooting the Model IAQ50 Symptom Possible Causes C[...]

35 Symptom Possible Causes Correcti ve Action Display reads "LO" Wrong AC adapter Replace with the correct AC adapter. Low AC line voltage Correct the AC line voltage or use batteries. Dirty battery contacts Clean the battery contacts. Display reads “CAL” The Model IAQ50 has detected an internal fault Return to factory for service. Di[...]

36 Symptom Possible Causes Correcti ve Action Display reads “LOG FULL” You are trying to enter more readings than memory can handle Read or record the average; clear the sample register and proceed. Display flashes “Libatt” Low lithium battery power Return to factory for replacement. SECTION 8 DIP Switch Settings To access the DIP switches,[...]

37 Table 8-1: DIP Switch Settings Switch OFF ON 1-3 Must be OFF ------- 4 Not assigned ------- 5 °F °C 6 Buzzer OFF Buzzer ON 7 Normal Mode Calibrate Mode 8 American Date Format and 12,345.67 European Date Format and 12.345,67 The ON position is away from the batteries and OFF is towards the bat teries. Always leave DIP switch #1– 4 in the OFF [...]

38 Specifications Specifications are subject to change w ithout notice. CO 2 Range: 0 to 5000 ppm Accuracy: 1 ±3% of reading at 25 o C or ± 50 ppm, whichever is greater Resolution: 1 ppm Sensor Type Dual wavelength NDIR (Non-dispersive Infrared) Temperature: Range: 0 to 60 ° C Accuracy: ± 0.6 ° C Resolution: 0.1 ° C Secondary Tempera ture Pro[...]

39 Wet Bulb: Range: 5 to 60°C Resolution: 0.1 ° C % Outside Air: Range: 0 to 100% Resolution: 0.1% Logging Capability: Up to 14,000 meas ure- ments in 1000 test ID’s Intervals: 5,6,7, 8,9,10,15,20, 25, 30 sec. 1,2,3,4, 5,6,7,8,9,10,15, 20,25,30,60 m in. Meter Dimensions: 89 mm × 168 mm × 41 mm Weight (with ba tteries): 0.53 kg Probe length: 1[...]

TSI Instruments Ltd . October 2005 Lancaster Road Printed in USA Cressex Business Park Part No. 1980533, Rev. A High Wycombe Buckinghamshire Tel: +44 (0) 149 4 459200 HP12 3QP England Fax: +44 (0) 149 4 459700 E-mail: info@airflow inst ruments.co.u k Copyright © 2005 Web: w ww.airflowinstr uments.co .uk TSI Incorporated[...]