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TSI Incorporated 8372 Operation And Service Manual

Air capture hood
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V e n t i l a t i o n T e s t i n g / B a l a n c i n g
Model 8372/73
®
A
B
Plus
CCU
ALANCE
Air Capture Hood
Operation and Service Manual
1980336, Revision C
October 2002

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Summary of Contents for TSI Incorporated 8372

  • Page 1 V e n t i l a t i o n T e s t i n g / B a l a n c i n g Model 8372/73 ® Plus ALANCE Air Capture Hood Operation and Service Manual...
  • Page 3 Model 8372/73 ® Plus ALANCE Air Capture Hood Operation and Service Manual 1980336, Revision C October 2002 U.S. MAIL TO: Sales and Customer Service: TSI Incorporated 500 Cardigan Road 1-(800) 874-2811 USA/ 001-(651) 490-2811 Shoreview, MN 55126-3996 Fax: E-mail address: 001-(651) 490-3824 answers@tsi.com...
  • Page 5 Copyright TSI Incorporated / October 2002 / All rights reserved. Address TSI Incorporated / 500 Cardigan Road / Shoreview, MN 55126 / USA Fax No. (651) 490-3824 LIMITATION OF WARRANTY AND LIABILITY (effective July 2000) Seller warrants the goods sold hereunder, under normal use and service as described in the...

  • Page 7: Table Of Contents

    Automatic Shut-off ............11 2. OPERATIONS IN MORE DETAIL ........13 Keypad Functions..............13 Field Calibration - Model 8372 Only........24 Additional Keypad Functions for the Model 8373 ....24 Field Calibration - Model 8373 Only........25 Changing Hoods..............26 Changing DIP Switch Settings ..........
  • Page 8 4. TROUBLESHOOTING ............37 Appendixes A. BACK PRESSURE .............41 B. SPECIFICATIONS...............43...

  • Page 9: About This Manual

    About this manual This manual explains how to set up, operate and maintain the ® Model 8372/8373 A Plus Air Capture Hood. Read it ALANCE thoroughly before using the instrument. Formatting and Typography Note that step-by-step instructions are numbered in boldface type: 1, 2, 3, etc., set flush-left against the margin.

  • Page 10: Introduction

    Introduction ® The TSI Models 8372/8373 A Plus are instruments designed ALANCE to measure the air flow from diffusers and grilles or the air flow entering exhaust outlets. The A Plus is lightweight and easy to use. ALANCE The instrument can display the measured air flow in four different units:...

  • Page 11: Chapters

    Check the individual parts against the list of components in Tables 1 through 3. If any are missing or damaged, notify TSI immediately. Table 1 List of components Item Part No. Model 8372/8373 base 2 ft x 2 ft (610 mm x 610 mm) hood fabric 1307060 Frame support poles 1081390...
  • Page 12 Item Part No. Battery holder 1081279 C-size batteries 1208018 Battery compartment cover 1081458 Carrying case 1319067 Operation and Service Manual 1980336 Data download RS232 cable 1082798 3½” floppies containing the “Logdat” data 800832 download software *Four of the 2 ft frame tubings and four of the right angle connectors are shipped assembled inside the top of the hood fabric.

  • Page 13: Parts Identification

    Parts Identification Before proceeding with assembly and use of the A Plus, please ALANCE familiarize yourself with the various parts of the instrument. Refer to Tables 1 through 3 for part descriptions and Figure 2 for general location of major items. Figure 2: A components ALANCE...
  • Page 14 Flow direction arrows: Indicates if supply or return air flow calibration is being utilized by the A ALANCE Notice: For Model 8372 - Be sure this arrow points in the direction of flow through the A Plus otherwise the measurements made ALANCE will be inaccurate.

  • Page 15: Display Units

    Keypad Below is a drawing of the key pads, Figure 4, for the Model 8372, Figure 5, for the Model 8373. The keys are referenced in the Basic Operation section of this chapter and in Chapter 2 - Operations in More Detail.

  • Page 16: Changing The Real-Time Clock

    Figure 4: Keypad for the Model 8372 Figure 5: Keypad for the Model 8373 Changing the Real-Time Clock The A Plus has an internal real-time clock that keeps track of ALANCE the time of day (the format is HH.MM where HH is the hour in 24-hour format and MM is minutes) and the date.

  • Page 17: Compliance Statement For Y2K

    Use the ENTER key to store each setting and advance to the next one. Compliance Statement for Y2K The A Plus Models 8372 and 8373 will perform as follows: ALANCE No value for date will cause any interruption in operation.

  • Page 18: Hood Assembly

    Place batteries in the battery holder located inside the battery compartment. Follow the illustration on the battery holder for correct battery orientation. Replace the battery cover. Notice that the battery cover is designed to fit only one way, with the tab pointing toward the fabric.

  • Page 19: Basic Operation

    Rod to pole cup Figure 6: Installing a support pole Insert the second support pole into the pole mount on the opposite side of the A Plus base. ALANCE Repeat step 3 for the second support pole. Repeat steps 4 and 5 for the remaining two support poles. Basic Operation Start-Up Press the ON/OFF key on the meter to turn on the power.

  • Page 20: Taking A Flow Measurement

    Model 8372, press the SUPPLY/RETURN key. Model 8373 will automatically detect and indicate the direction of the flow. Taking a Flow Measurement You are now ready to start measuring flow rates. First, turn on the Plus. For the Model 8372, select the appropriate flow ALANCE direction.

  • Page 21: Automatic Shut-Off

    Automatic Shut-off The A Plus will automatically shut itself off if no keys or ALANCE buttons have been pressed for 10 minutes. This feature minimizes accidental loss of battery power. This feature may be disabled by changing the factory settings. This is discussed in the Changing DIP Switch Setting section of the next chapter.

  • Page 23: Operations In More Detail

    Chapter 2 Operations in More Detail This chapter explains how to change fabrics and assemble different hood sizes and presents more detail on the various features of the A ALANCE Plus. Keypad Functions ON/OFF Press to toggle between having the instrument on and off. The power ON/OFF key is located on the meter keypad of the A ALANCE Plus.
  • Page 24 “ACTUAL” will light up on the display (standard is the default). Press and hold to view the barometric pressure and ambient pressure. For Model 8372, press and hold to adjust the barometric pressure and ambient temperature values. When the key is pressed and held, the barometric pressure entered will be displayed.
  • Page 25 Press to print the reading on the display. Press to scroll through choices. To set time and date for both models, and to set barometric pressure and temperature for Model 8372, press either the key when they are displayed during power-up. These keys are also used to adjust the baud rate, which must be performed during the power up of the instrument.
  • Page 26 To change the values for the BALANCE MODE, press and hold to view, enter, or change the desired flow rate. When held, the last target flow rate entered will be displayed and “BAL” will appear on the small display. Release the key to change the flow rate and press ENTER to key.
  • Page 27 There are a few simple rules that govern how an A Plus will ALANCE store data: Rule 1: SUPPLY and RETURN values can not both be stored in the same “TEST ID”. In other words, each “TEST ID” can contain values of RETURN or SUPPLY readings, but not both.
  • Page 28 TEST ID 1 TERM. 2 TEST ID 2 TEST ID 3 TERM. 1 TERM. 1 TERM. 3 TERM. 1 TERM. 2 SUPPLY BRANCH #1 TERM. 4 TERM. 6 TERM. 3 TERM. 2 TERM. 1 TERM. 5 TEST ID 4 BRANCH #1 Figure 9: Building System With 4 Tests and 4 Branches Figure 9 might be used if the AHU in our example served two rooms.
  • Page 29 These examples are provided to illustrate that there are a variety of ways that you can organize the data that is gathered using the A Plus. ALANCE The final structure of the data will depend on individual preference or how to report the data gathered.
  • Page 30 TEST ID (clear) Test ID only Press and release to display the current Test ID. “TEST ID” will be indicated keys to change the Test ID and ENTER to on the display. Press the accept it. The unit returns to measurement mode. For Test ID’s with data in them, the big display has “SUP”...
  • Page 31 To view STATISTICS of the current TEST ID Press STATISTICS to view the TOTAL of the current TEST ID. “TEST ID” and the current number of the TEST ID will flash on the small display. The “TOTAL” value will be displayed on the large display. Press STATISTICS repeatedly to display “MINIMUM”, “MAXIMUM”, “AVERAGE”, and “COUNT”.
  • Page 32 To view STATISTICS of a different TEST ID and the BRANCH STATISTICS Press STATISTICS to view the TOTAL of the current TEST ID. “TEST ID” and the current number of the TEST ID will flash on the small display. The “TOTAL” value will be displayed on the large display. key to move to other available TEST ID.
  • Page 33 supply Test ID. If the Test ID is a return Test ID the big display has “RET” and the ↑ indicated. key to move to other available TEST ID. Press the Press ENTER. The small display will flash “TERMINAL” along with a number and will then flash “BRANCH”...

  • Page 34: Field Calibration - Model 8372 Only

    (model 8373), or using the values the user has entered (model 8372). Press and hold the ACTUAL/STANDARD key to view the measured or entered barometric pressure. Press the ENTER key to view the...

  • Page 35: Field Calibration - Model 8373 Only

    measured or entered temperature. Press the ENTER key again to return to the measuring mode. SAMPLE If the flow direction changes while a sample is being taken, that sample is invalid. A double beep will sound and “DIR” and “↑↓” will flash on the display, “ERR”...

  • Page 36: Changing Hoods

    To return to factory calibration for all values, turn DIP Switch 7 to the OFF position. All adjustment values are retained in memory and can be reinstated by turning DIP Switch 7 ON again. Changing Hoods The A Plus is shipped with a 2 ft x 2 ft hood attached to the ALANCE base.
  • Page 37 Figure 11: Diagram of 2 ft x 4 ft frame Unfold the 2 ft x 4 ft hood fabric. Insert the frame into the fabric and fasten the fabric to the frame using the Velcro surfaces. The fabric stretches around the outside, then up and over the frame structure.
  • Page 38 At this time it is helpful to be near a table or some other thigh-high surface to help hold up the fabric while you install the first support pole. With the base of the A Plus on the floor, lift the fabric ALANCE frame up so that a white mark is directly in front of you.
  • Page 39 Figure 12: Diagram of 1 ft x 4 ft frame Unfold the 1 ft x 4 ft fabric hood. Continue with steps 3 through 10, beginning on page 27. 1 ft x 5 ft Hood To assemble and attach the 1 ft x 5 ft hood, carefully follow these 10 steps: Build the 1 ft x 5 ft frame structure as shown in Figure 13 using four 2 ft aluminum frame tubing pieces, two 1x tube connectors, two 1 ft aluminum frame tubing pieces, and four right-angle tubing connectors.

  • Page 40: Changing Dip Switch Settings

    pieces, four right-angle tubing connectors, and four straight tubing connectors. Remember to construct the frame so that all Velcro surfaces face in (toward the center of the structure). Notice: Make sure that all support pole cups in the aluminum frame tubing pieces are facing downward.

  • Page 41: Switch Number

    Figure 15: Location of DIP Switches You may change the switch settings using the tip of a ballpoint pen, pencil, compass, small screwdriver, or other small, pointed object. Refer to Table 4 for switch settings. Table 4. DIP Switch Settings Switch Number Setting: Function 1 OFF, 2 OFF: Flow units = CFM...
  • Page 42 16 and 17 depict the printout of each unit. Note that on the printout for Model 8373, the symbol “^” is used. This indicates that the flow is RETURN flow. ACCUBALANCE MODEL 8372 ACCUBALANCE MODEL 8373 SERIAL NUMBER 12345678 SERIAL NUMBER 12345678...

  • Page 43: Connecting To A Computer

    Connecting to a Computer Use the Computer Interface Cable provided with the A Plus to ALANCE connect the instrument to a computer for downloading stored data or for remote polling. Connect the 9-pin end of the cable to the computer COM port and the other end to the data port of the A Plus.

  • Page 45: Maintenance

    Chapter 3 Maintenance The A Plus is designed for long-term field use. If the ALANCE Plus is used with reasonable care, it should be able to make ALANCE precise measurements over a long time period. Some of the components can be cleaned periodically.

  • Page 46: Meter

    Meter The A Plus has a built-in electronic flow meter. Do not try to ALANCE detach the meter from the base. The A Plus should be used and ALANCE stored within the specified temperature range, 32–140°F (0-60°C). The meter case, display screen and membrane key can be cleaned using a damp cloth with mild detergent solution.

  • Page 47: Troubleshooting

    Chapter 4 Troubleshooting Table 6 and 7 lists the symptoms, possible causes, and recommended solutions for common problems encountered with the A Plus. ALANCE If your symptom is not listed, or if none of the solutions solves your problem, please contact TSI. Table 6: Troubleshooting the A Plus ALANCE...
  • Page 48 Symptom Possible Causes Corrective Action Flow reading The flow is fluctuating Use a longer time fluctuates badly constant. “ERR” appears in Flow direction changed Make sure flow stays in small letter and “dir while taking sample one direction (supply or ↑↓”...
  • Page 49 Table 7: Further troubleshooting of the Model 8373 Symptom Possible Causes Corrective Action “ERR6” appears Temperature sensor Return to factory for damaged service “ERR7” appears Barometric pressure Return to factory for sensor damaged service “ERR8” appears Flow direction sensor Return to factory for damaged service Troubleshooting...
  • Page 51 Appendix A Back Pressure It is commonly known that an air capture hood may induce a back pressure. In general, back pressures are caused by restrictions in the flow path as well as frictional pressure losses. In order to improve accuracy and sensitivity, all air capture hoods incorporate a contracted flow section.
  • Page 52 C b = ---- where V and V o are the average air velocities in the duct ahead of the diffuser with and without the capture hood in place, respectively. With the known correction factor, the back-pressure corrected flow can be determined using Equation (2): Back-pressure corrected flow = Displayed flow x C b Appendix A...

  • Page 53: B. Specifications

    Appendix B Specifications Flow Range 30-2,000 CFM (15.0-1,000 l/s, 50-3,500 m /hr, 0.84-55.0 /min) ±5% reading ±5 CFM (±5% Accuracy reading ±2.4 l/s, ±5% reading ±8.5 /hr, ±5% reading ±0.015 m /min) Operating Temperature Range 32-140°F (0-60°C) Data Memory 1000 points = sum of systems + branches + terminals Temperature (Model 8373 only) Range...
  • Page 54 Hood Sizes Available 2 ft × 2 ft; (610 mm × 610 mm) Standard: 2 ft × 4 ft; (610 mm × 1220 mm) Optional: 1 ft × 4 ft; (305 mm × 1220 mm) 1 ft × 5 ft; (305 mm × 1525 mm) 3 ft ×...
  • Page 55 TSI Incorporated 500 Cardigan Road, Shoreview, MN 55126 U.S.A. Web: www.tsi.com...

This manual is also suitable for:

8373Accubalance plus 8372Accubalance plus 8373

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