TSI Instruments ALNOR EBT720 User manual

Electronic Balancing Tool
Models EBT720 and EBT721
OWNER’S MANUAL
EBT720-Z_ shown
EBT721-Z_ shown

LIMITATION OF WARRANTY AND LIABILITY
Copyright©
TSI Incorporated / March 2004 / All rights reserved.
Address
TSI Incorporated / Alnor Products / 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. This 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 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 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 problems. If any malfunction is discovered,
please contact your nearest sales office or representative, or call Customer Service at [phone] or
[phone].
.

i
CONTENTS
About This Manual.....................................................................................................................iii
Formatting and Typography....................................................................................................iii
Technical Assistance—Help! ..................................................................................................iii
Chapter 1. Introduction .............................................................................................................1
Instrument Description............................................................................................................1
Micromanometer ...............................................................................................................2
Micromanometer.....................................................................................................................2
Standard Tools........................................................................................................................3
Pitot Tube..........................................................................................................................3
Static Pressure Probe.......................................................................................................3
Optional Tools.........................................................................................................................3
Capture Hoods..................................................................................................................3
Velocity Matrix...................................................................................................................3
Air Flow Probe...................................................................................................................3
Temperature Probe...........................................................................................................3
Temperature/Humidity Probe............................................................................................3
Chapter 2. Unpacking and Setting Up......................................................................................5
Unpacking...............................................................................................................................5
Preparing the Instrument for Use............................................................................................6
Power the Micromanometer with the AC Adapter.............................................................6
Power the Micromanometer with Batteries........................................................................6
Connecting the Pitot Tube to the Micromanometer.................................................................8
Connecting the Static Pressure Port to the Micromanometer.................................................8
Attaching the Micromanometer to the Capture Hood Base.....................................................9
Connecting the Velocity Matrix to the Micromanometer....................................................9
Connecting the Air Flow Probe to the Micromanometer .......................................................10
Connecting the Temperature Probe or Temperature and Humidity Probe to the
Micromanometer .............................................................................................................10
Chapter 3. Getting Started ......................................................................................................13
Keypad Operation.................................................................................................................13
Common Terms ....................................................................................................................14
Sample............................................................................................................................14
Logging Interval...............................................................................................................14
Test ID.............................................................................................................................14
Step-By-Step Example Operation.........................................................................................15
Chapter 4. How To ...................................................................................................................17
Select a Tool.........................................................................................................................17
Set the Time and Date..........................................................................................................19
Change the Currently Selected Test ID ................................................................................19
Recall Sample Data ..............................................................................................................19
Delete Sample Data..............................................................................................................20
Delete all Sample Data ...................................................................................................20
Delete the Samples Stored in a Single Test ID...............................................................20
Delete a Single Sample...................................................................................................20
Select/Set a K-factor for a Tool.............................................................................................21

ii
View/Set Standard Pressure and Temperature ....................................................................21
Set Units of Measure for Temperature, Pressure, Velocity/Flow and Humidity....................23
Select the RS232 Output Device (Computer or Printer) .......................................................23
Set the Baud Rate.................................................................................................................24
Set the Format for Date and Decimal....................................................................................24
Set Display Mode for Running Average or Single.................................................................25
Select Discrete or Continuous Logging.................................................................................25
Turn Back Pressure Compensation On and Off....................................................................26
Take Back Pressure Compensated Hood Readings.............................................................26
Calibrate the Micromanometer (User Calibration).................................................................26
Select User Calibration or Factory Calibration......................................................................27
Connect and Download Data to an Optional Printer.............................................................27
Connect and Download Data to a Computer ..................................................................28
Data Acquisition (Polling)......................................................................................................29
Chapter 5. Changing Flow Hoods ..........................................................................................31
Flow Hood Parts Identification ..............................................................................................31
Hood Assembly.....................................................................................................................31
Alternate Hood Installation..............................................................................................32
Chapter 6. Flow Measurements Using the Capture Hood....................................................35
Non-Backpressure Compensated Measurements................................................................35
Single Measurements ...........................................................................................................35
Running Average Measurements..........................................................................................35
Backpressure Compensated Measurements........................................................................36
Error Display .........................................................................................................................36
Chapter 7. Maintenance and Troubleshooting......................................................................37
Fabric Hood...........................................................................................................................37
Micromanometer...................................................................................................................37
Manifold.................................................................................................................................37
Cases..............................................................................................................................37
Calibration.............................................................................................................................38
Error Code.......................................................................................................................39
Appendix A. Back Pressure....................................................................................................43
Verifying Flow Measurements...............................................................................................43
Appendix B. Actual vs. Standard Air Velocity and Flow Measurements............................45

iii
About This Manual
This manual explains how to set up, operate and maintain the Alnor®Electronic Balancing Tools (EBT)
Models EBT720 and EBT721. Read it thoroughly before using the instrument.
Formatting and Typography
Step-by-step instructions are numbered in boldface type: 1,2,3, etc., set flush-left against the
margin.
References to keys on the micromanometer and the instrument's displayed readout are represented by
a typeface called Arial. 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.
Technical Assistance—Help!
For technical assistance or questions about the instrument of this manual, or if the Electronic Balancing
Tool needs repair or recalibration, call Technical Support at [phone] or [phone]. Product
application notes are available to provide more information on the product. These application notes, as
well as other related material, can be obtained by calling Customer Service or by visiting the Alnor web
site at http://www.alnor.com.

1
Chapter 1. Introduction
The Electronic Balancing Tools (EBT) Models EBT720 and EBT721 are lightweight and easy-to-use
instruments packaged with a variety of accessories for measuring pressure, temperature, humidity, air
velocity, and air volume. Features of the micromanometer include:
Single-function keys for ease of use
Auto-zero for pressure measurements, auto-density correction, and back-pressure compensation when
used with a capture hood
User-selectable English and metric units
Conversions between actual and standard flow
Discrete or continuous display and data logging capabilities
Output port for downloading to a printer or a PC
Powered by AC adapter or batteries (rechargeable NiMH or alkaline)
Full field calibration
The Electronic Balancing Tool is designed for:
Test and balance professionals
Mechanical contractors
Industrial hygienists
Plant engineers and facilities maintenance personnel
Applications include:
Test, balance, or commission HVAC systems
Test clean rooms and biological safety cabinets
Measure fume hood or filter face velocity
Measure pressure, temperature, relative humidity, air velocity, or air flow
Instrument Description
The basic EBT720 includes a micromanometer, carrying case, 18 in. (46 cm) pitot tube, (2) static pressure
probes, (2) 8 ft (2.4 m) Norprene®tubing, user manual, CompuDat™ for Windows®data downloading
software and RS232 interface cable, neck strap, internal NiMH battery charger, (4) AA NiMH batteries,
AC adapter, and NIST traceable certificate.
The basic EBT721 contains all of the EBT720 components plus 2 ft ×2 ft (610 mm ×610 mm) air
capture hood, frame, and base. A variety of optional tools (see below) are also available to meet your
measurement needs.
The following paragraphs provide brief descriptions of the micromanometer and the various standard and
optional tools for use with the EBT. Refer to Chapters 3 and 4 for more detailed information on using the
micromanometer and taking measurements with various sensors and probes.
®Norprene is a registered trademark of Norton Performance Plastics, Akron, Ohio, USA.

2 Electronic Balancing Tool Models EBT720 and EBT721
Micromanometer
Figures 1 and 2 show the features of the micromanometer used in the Models EBT720 and EBT721.
Figure 1: Features of the Alnor Models EBT720 and EBT721 Micromanometer, Front View
Figure 2: Features of the Alnor Models EBT720 and EBT721 Micromanometer, Back View
Micromanometer
The micromanometer is a multifunction instrument useful in obtaining air velocity, air flow, absolute and
differential pressure, temperature, and humidity measurements when used with the tools listed below. The
lightweight micromanometer incorporates auto-zeroing for high-accuracy, low-end pressure
measurements.
Display
Keypad
AC Adapter
Connection
RS232 Port
For Future Use
Probe Connector
Headphone
Connection
Battery
Compartment
Airflow
Inlet/Outlet

Chapter 1: Introduction 3
Standard Tools
This section gives a brief description of standard tools for the micromanometer.
Pitot Tube
The pitot tube is primarily used to obtain air velocity, air volume, and velocity pressure measurements
within ductwork.
Static Pressure Probe
The static pressure probe is primarily used to obtain static pressure measurements within ductwork.
Optional Tools
This section gives a brief description of optional tools for the micromanometer.
Capture Hoods
Capture hoods are primarily used to obtain volumetric air flow measurements through diffusers, registers
and grilles. Capture hoods are available in a kit with one 2 ft ×2 ft (610 mm ×610 mm) fabric hood,
frame, and base assembly. Alternate hood sizes are available and descriptions and part numbers can be
found in Table 2 of Chapter 2 in this manual.
Velocity Matrix
The velocity matrix is primarily used to obtain area-averaged multi-point air velocity measurements
useful in laboratory hood face velocity testing, filter face velocity testing, and other applications.
Air Flow Probe
The air flow probe is primarily used to obtain single point air velocity or air volume measurements in
ductwork.
Temperature Probe
The temperature probe is used to obtain temperature measurements over the range of -40 to 250°F (-40 to
121°C).
Temperature/Humidity Probe
The temperature/humidity probe is used to obtain temperature measurements over the range of 14 to
140°F (-10 to 60°C), humidity measurements over the range of 0 to 95% RH, along with calculated wet
bulb temperature of 40 to 140°F (4 to 60°C) and dewpoint temperature of 5 to 120°F (-15 to 49°C).