TSI Incorporated 8372, 8373, ACCUBALANCE Plus 8372, ACCUBALANCE Plus 8373 Operation And Service Manual

Ventilation Testing/Balancin

g

Model 8372/73

A

CCUBALANCE

Air Capture Hood

Operation and Service Manual

®

Plus

1980336, Revision C

October 2002

A

CCUBALANCE

Air Capture Hood

Operation and Service Manual

U.S.
Sales and Customer Service:

1-[phone] USA/
001-[phone]

Fax:

001-[phone]

Model 8372/73

®

Plus

1980336, Revision C

October 2002

MAIL TO:

TSI Incorporated

500 Cardigan Road

Shoreview, MN 55126-3996

USA

E-mail address:

[e-mail]

Website:

http://www.tsi.com

Copyright
TSI Incorporated / October 2002 / All rights reserved.

Address

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

Fax No.

[phone]

LIMITATION OF WARRANTY AND LIABILITY (effective July 2000)

Seller warrants the goods sold hereunder, under normal use and service as described in the
operator's manual, shall 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. T his limited warranty is
subject to the following exclusions:
a. Hot-wire or hot-film sensors used with research anemometers, and certain other

components when indicated in specifications, are warranted for 90 days from the date of
shipment.

b. Parts repaired or replaced as a result of repair services are warranted to be free from

defects in workmanship and material, under normal use, for 90 days from the date of
shipment.

c. Seller does not provide any warranty on finished goods manufactured by others or on any

fuses, batteries or other consumable materials. Only the original manufacturer's warranty
applies.

d. Unless specifically authorized in a separate writing by Seller, Seller m a kes 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 NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL,
CONSEQUENTIAL OR INCIDENTAL DAMAGES. SELLER SHALL NOT BE
RESPONSIBLE FOR INSTALLATION, DISMANTLING OR REINSTALLATION COSTS
OR CHARGES. No Action, regardless of form, may be brought against Seller more than 12
months after a cause of action has accrued. The goods returned under warranty to Seller's
factory shall be at Buyer's risk of loss, and will be returned, if at all, at Seller's risk of loss.

Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND
LIABILITY, which contains the complete and exclusive limited warranty of Seller. This
LIMITATION OF WARRANTY AND LIABILITY may not be amended, modified or its terms
waived, except by writing signed by an Officer of Seller.

Service Policy

Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our
customers, our service policy is designed to give prompt attention to any pr oblems. If any
malfunction is discovered, please contact your nearest sales office or representative, or call TSI's
Customer Service department at [phone] or ( 800) 874-2811

.

CONTENTS

ABOUT THIS MANUAL .............................................................III

INTRODUCTION ........................................................................IV

Chapters

1. SET UP..................................................................................1

Unpacking..............................................................................1

Parts Identification.................................................................3

Display...................................................................................3

Display Units..........................................................................5

Keypad ..................................................................................5

Changing the Real-Time Clock .............................................6

Compliance Statement for Y2K.............................................7

Changing the Baud Rate....................................................... 7

Preparing the Instrument for Use..........................................7

Installing the Batteries.....................................................7

Hood Assembly...............................................................8

Basic Operation.....................................................................9

Start-Up...........................................................................9

Selecting Flow Direction ................................................. 9

Taking a Flow Measurement ........................................10

Turning the A

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 ............................................30

Switch Number....................................................................31

Connecting the Optional Printer..........................................31

Connecting to a Computer ..................................................33

Downloading Data to a Computer.......................................33

Data Acquisition (Polling)....................................................33

CCUBALANCE Plus Off ..............................10

3. MAINTENANCE..................................................................35

Fabric Hood.........................................................................35

Meter ...................................................................................36

Manifold...............................................................................36

Cases ..................................................................................36

Calibration ...........................................................................36

4. TROUBLESHOOTING........................................................37

Appendixes

A. BACK PRESSURE .............................................................41

B. SPECIFICATIONS...............................................................43

ii

About this manual

This manual explains how to set up, operate and maintain the
Model 8372/8373 A
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.

References to the front panel keys on the A
the instrument's displayed readout, are represented in this manual by the
typeface called Arial Narrow. In addition to the different typeface, displayed
messages appear in quotes.

When reference is made to other sections of the manual, the section title is
italicized.

Example: The “SAMPLE” message will appear along with a flow value after
you have activated the SAMPLE key (from Display in Chapter 1).

HELP!

If you need technical assistance with this instrument, have questions about
the manual, or your air capture hood needs repair or recalibration please call
TSI's Environmental Measurements and Control Division at [phone]
or [phone]. Product application notes are designed to provide more
information on the product to the user. Application notes, as well as other
related material, can be obtained by calling TSI or by visiting the TSI web
site at http://www.tsi.com.

CCUBALANCE® Plus Air Capture Hood. Read it

CCUBALANCE Plus, along with

Introduction

The TSI Models 8372/8373 A
to measure the air flow from diffusers and grilles or the air flow entering
exhaust outlets. The A
The instrument can display the measured air flow in four different units:
standard cubic feet per minute (SCFM), standard liters per second (Std l/s),
standard cubic meters per hour (Std m
minute (Std m

3

/min). All readings may also be displayed in actual flow

conditions.

CCUBALANCE Plus consists of a fabric hood, a molded plastic base

The A
which contains an electronic meter, and a flow sensing manifold located
within the base. Air flowing through the hood is measured by a hot-film
sensor located in the central hub of the flow sensing manifold. The twenty­four pairs of flow sensing ports in the manifold are strategically located so
that the A

CCUBALANCE Plus provides the highest degree of measurement

accuracy, even in non-uniform flow conditions.

CCUBALANCE Plus is temperature-compensated to display a standard

The A
flow rate: SCFM, Std l/s, Std m
defined as the volumetric flow rate at standard conditions of 70°F (21.1°C)
and 14.7 pounds per square inch (760 mmHg) barometric pressure.
Standard flow rate is the measurement used most often in ventilation
applications.

CCUBALANCE® Plus are instruments designed

CCUBALANCE Plus is lightweight and easy to use.

3

/hr), and standard cubic meters per

3

/hr, and Std m3/min. Standard flow rate is

iv

Chapter 1

Set Up

This chapter guides you through unpacking, setting up, and getting started
using your A
all operating features.

CCUBALANCE Plus. See Chapter 2 for a detailed description of

Figure 1: The A

Unpacking

Carefully unpack the instrument and accessories from the carrying case.
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

Qty Item Part No.

1 Model 8372/8373 base N/A
1 2 ft x 2 ft (610 mm x 610 mm) hood fabric 1307060
6 Frame support poles 1081390
4 2 ft (610 mm) frame tubing* 1081262
6 Right angle tubing connectors* 1081584

CCUBALANCE Plus

1

Qty Item Part No.

1 Battery holder 1081279
4 C-size batteries 1208018
1 Battery compartment cover 1081458
1 Carrying case 1319067
1 Operation and Service Manual 1980336
1 Data download RS232 cable 1082798
3 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.

Table 2 List of components: -3 Hood Kit (adds 2 hoods to the
base kit)

Qty Item Part No.

1 2 ft x 4 ft (610 mm x 1220 mm) hood fabric 1801065
1 1 ft x 4 ft (305 mm x 1220 mm) hood fabric 1801066
6 2 ft (610 mm) frame tubing 1081262
4 1 ft (305 mm) frame tubing 1081260
6 Right angle tubing connectors 1081584
6 Straight tubing connectors 1302833

Table 3 List of components: -5 Hood Kit (adds 4 hoods to the
base kit)

Qty Item Part No.

1 2 ft x 4 ft (610 mm x 1220 mm) hood fabric 1801065
1 1 ft x 4 ft (305 mm x 1220 mm) hood fabric 1801066
1 1 ft x 5 ft (305 mm x 1525 mm) hood fabric 1801067
1 3 ft x 3 ft (915 mm x 915 mm) hood fabric 1801068
6 2 ft (610 mm) frame tubing 1081262
4 1 ft (305 mm) frame tubing 1081260
6 Right angle tubing connectors 1081584
6 Straight tubing connectors 1302833
2 1x tube connectors 1081580

Included with this product is a registration card. Please complete and mail it
promptly; it allows TSI to inform you of product updates. You may also
register on line by visiting the TSI web site.

2 Chapter 1

Parts Identification

Before proceeding with assembly and use of the A

CCUBALANCE Plus, please

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.

2

1

6

3

4

5

Figure 2: A

CCUBALANCE components

1 Fabric hood - Basic hood assembly is covered later in this chapter,

other hoods are discussed in Chapter 2.

2 Right handle with SAMPLE key - used for capturing information on the

display.

3 Meter base

4 Electronic meter and display - Detailed keypad functions are covered

in Chapter 2.

5 Printer bracket - Allows the Model 8925 to be attached to the

CCUBALANCE base for ease of use and recording of data.

A

6 Left handle with PRINT button - Used to print that which is on the

display value to the portable printer.

Display

Each time the A

CCUBALANCE is turned on, all segments of the display will

be shown momentarily. Below is a list of items that will appear on the
display and their use.

Set Up 3

5 9

3

2

Figure 3: Display of the Model 8372/8373

1 Flow units: CFM (cubic feet per minute), l/s (liters per second), m

(cubic meters per hour), and m

CCUBALANCE indicates flow already corrected to "standard"

A

3

/min (cubic meters per minute). The

conditions. Actual flow conditions can be shown by pressing the
ACTUAL/STANDARD key (see Chapter 2 for more detail operation).

2 Flow value: Large digits. See specifications for range and resolution.

3 Message area: Small digits. Simultaneous temperature measurement.

4 Flow direction arrows: Indicates if supply or return air flow

calibration is being utilized by the A

CCUBALANCE.

Notice: For Model 8372 - Be sure this arrow points in the direction of flow

through the ACCUBALANCE Plus, otherwise the measurements made
will be inaccurate. To change the direction of the arrow, press the
SUPPLY/RETURN key. (The Model 8373 senses direction
automatically)

5 ”SAMPLE” will appear every time you press the SAMPLE key or the

button on the top of the right handle.

3

8

4

1

6,7

/hr

6 “%

“ will appear along with a value on the display during power-

up to indicate the percent of battery life remaining.

7 The

symbol will flash when the batteries have only about 10%

life remaining. When the battery is too low for accurate measurements

“LO

“ is displayed momentarily before the instrument is

automatically turned off.

4 Chapter 1

8 “STD” or “ACTUAL” will be displayed at all times. “STD” refers to

readings that are based on standard conditions of 29.92 in. Hg (760
mm Hg) and 70 °F (21.1 °C). “ACTUAL” refers to readings that are
converted to local conditions based on temperature and barometric
pressure.

9 “K

”: K factor symbol to indicate that the readings have an adjustment

f

factored in.

10 “TOTAL”, “MIN”, “MAX”, “AVG”, “COUNT” will be displayed when viewing

STATISTICS.

11 “TEST ID”, “BRANCH”, “TERMINAL” will be displayed when viewing data

for a SAMPLE or when reviewing data.

Display Units

CCUBALANCE Plus is shipped with cubic feet per minute (CFM) as the

The A
default flow unit, °F for temperature, and in. Hg (inches of mercury) for
barometric pressure (unless the metric version was ordered). If you wish to
change the units to l/s (liters per second), m

3

m

/min (cubic meters per minute), °C for temperature, and mm Hg

3

/hr (cubic meters per hour),

(millimeters of mercury) for barometric pressure, see Changing DIP Switch
Settings in Chapter 2. Please note that no units will be shown on the display
for barometric pressure.

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.

Set Up 5

Figure 4: Keypad for the Model 8372

Figure 5: Keypad for the Model 8373

Changing the Real-Time Clock

CCUBALANCE Plus has an internal real-time clock that keeps track of

The A
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. It is very important to set the time
and date correctly, otherwise date and time stamping of recorded data will
not be correct. This information has been set to Central Time (GMT - 6
hours) (Standard or Daylight Savings) at the factory before shipping. The

CCUBALANCE Plus does not self-adjust for Daylight Savings Time.

A

6 Chapter 1

To change the time and date, press and hold either the ▲ or ▼ key during
the power-up sequence when the time is displayed. Release the keys when

CCUBALANCE Plus beeps twice. You will have an opportunity to view

the A
and/or change the hours, minutes, year, month, and day of month in
sequence. Use the up and down arrow keys (▲▼) to change any settings.
Use the ENTER key to store each setting and advance to the next one.

Compliance Statement for Y2K

CCUBALANCE Plus Models 8372 and 8373 will perform as follows:

The A

1 No value for date will cause any interruption in operation.
2 Date-based functionality will behave consistently for all dates prior to,

during and after the year 2000.

3 The instrument does not keep track of century, and all years are output

in 2-digit format. Year 1999 prints as '99' and year 2000 prints as '00'.

4 The leap year for year 2000 will be recognized.

Changing the Baud Rate

The A

CCUBALANCE Plus has a variable baud rate that is used when

downloading or printing data from the instrument. By changing the baud
rate to a higher rate, the data will be downloaded faster. NOTE: The baud
rate must be equal to that of your computer or printer. The baud rate for the
Model 8925 printer is set as 1200.

The instrument baud rate is displayed during the initial power up sequence.
To change the baud rate, press and hold either the ▲ or ▼ key during the
power-up sequence while the baud rate is displayed. Release the keys when

CCUBALANCE Plus beeps twice. Use the ▲ and ▼ keys to scroll

the A
through the available values of 1200, 2400, 4800, 9600, and 19200. Press
ENTER to set the value that is displayed.

Preparing the Instrument for Use

Installing the Batteries

CCUBALANCE Plus requires four C-size batteries to operate. For

The A
your convenience, four alkaline batteries are included with the

CCUBALANCE Plus.

A

To install the batteries, follow these three steps:

1 The battery cover is located behind the electronic meter on the

inner side of the A

CCUBALANCE Plus base. To remove the battery

cover, pull up on the latches located on the top and bottom of the
cover.

Set Up 7