TSI Instruments AIRFLOW Instruments ProHood PH720 Manuale utente

OWNER’S MANUAL

Alnor®Electronic Balancing Tool

Models EBT720/EBT721

and

AIRFLOW™Instruments ProHood™

Capture Hood Models PH720/PH721

EBT720/PH720 Shown with all

accessory options

EBT721/PH721 Shown with

all accessory options

LIMITATION OF WARRANTY AND LIABILITY

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 department at

+44 (0) 149 4 459200 (UK), (800) 874-2811 (USA), or (1) 651-490-2811 (International).

Trademarks

TSI®, TSI logo, Alnor®, AIRFLOW™ Instruments, LogDat1, and ProHood™ are trademarks of TSI

Incorporated.

CONTENTS

About This Manual.....................................................................................................................iii

Formatting and Typography....................................................................................................iii

Technical Assistance—Help! ..................................................................................................iii

Chapter 1. Introduction ..............................................................................................................1

Instrument Description............................................................................................................1

Micromanometer ...............................................................................................................2

Micromanometer.....................................................................................................................3

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

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

Set Deadband On and Off.....................................................................................................27

Calibrate the Micromanometer (User Calibration).................................................................27

Select User Calibration or Factory Calibration......................................................................28

Connect and Download Data to an Optional Printer.............................................................28

Connect and Download Data to a Computer ..................................................................29

Data Acquisition (Polling)......................................................................................................30

Chapter 5. Changing Flow Hoods ...........................................................................................31

Flow Hood Parts Identification ..............................................................................................31

Hood Assembly.....................................................................................................................31

Alternate Hood Installation..............................................................................................32

Direct Inflow Measurement Hood for Biological Safety Cabinets....................................37

Chapter 6. Flow Measurements Using the Capture Hood.....................................................43

Non-Backpressure Compensated Measurements................................................................43

Single Measurements ...........................................................................................................43

Running Average Measurements..........................................................................................44

Backpressure Compensated Measurements........................................................................44

Error Display .........................................................................................................................45

Chapter 7. Maintenance and Troubleshooting.......................................................................47

Fabric Hood...........................................................................................................................47

Micromanometer...................................................................................................................47

Manifold.................................................................................................................................47

Cases..............................................................................................................................47

Calibration.............................................................................................................................48

Error Code.......................................................................................................................48

Appendix A. Back Pressure.....................................................................................................53

Verifying Flow Measurements...............................................................................................53

Appendix B. Actual vs. Standard Air Velocity and Flow Measurements.............................55

iii

About This Manual

This manual explains how to set up, operate and maintain the Alnor EBT720/EBT721 and AIRFLOW™

Instruments PH720/PH721. Read it thoroughly before using the instrument.

Caution

CAUTION

WHILE USING THE BALOMETER

AIR BALANCING INSTRUMENT TO TEST AIR

FLOW IN DUCTS,YOU MAY COME INTO CONTACT WITH OR BE EXPOSED TO

DUST,POLLEN,MOLD,FUNGUS,OR OTHER AIRBORNE CONTAMINANTS.IF YOU

ARE OR MAY BE SENSITIVE TO DUST,POLLEN,MOLD,FUNGUS,OR OTHER

AIRBORNE CONTAMINANTS,ALWAYS USE AN APPROPRIATE MASK OR

RESPIRATOR WHILE EMPLOYING THE BALOMETER®AIR BALANCING

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, or if the instrument needs repair or

recalibration, call Customer Service at +44 (0) 149 4 459200 (UK), (800) 874-2811 (USA), or (1) 651-

490-2811 (International). 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 web site at www.alnor.com or www.airflowinstruments.co.uk.

(This page intentionally left blank)

Chapter 1. Introduction

The Electronic Balancing Tools EBT720/EBT721 and ProHood™PH720/PH721 capture hoods 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

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

CAUTION

WHILE USING THE BALOMETER

AIR BALANCING INSTRUMENT TO TEST AIR

FLOW IN DUCTS,YOU MAY COME INTO CONTACT WITH OR BE EXPOSED TO

DUST,POLLEN,MOLD,FUNGUS,OR OTHER AIRBORNE CONTAMINANTS.IF YOU

ARE OR MAY BE SENSITIVE TO DUST,POLLEN,MOLD,FUNGUS,OR OTHER

AIRBORNE CONTAMINANTS,ALWAYS USE AN APPROPRIATE MASK OR

RESPIRATOR WHILE EMPLOYING THE BALOMETER®AIR BALANCING

INSTRUMENT.

Instrument Description

The basic EBT720/PH720 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, LogDat1™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.

®Norprene is a registered trademark of Norton Performance Plastics, Akron, Ohio, USA.

2 Electronic Balancing Tool EBT720/EBT721 and ProHood PH720/PH721

The basic EBT721/PH721 contains all of the EBT720/PH720 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/PH. Refer to Chapters 3and 4for more detailed information on using

the micromanometer and taking measurements with various sensors and probes.

Micromanometer

Figures 1 and 2 show the features of the micromanometer used in the EBT720/EBT721 and

PH720/PH721.

Figure 1: Features of the EBT720/EBT721 and PH720/PH721 Micromanometer, Front View

Figure 2: Features of the EBT720/EBT721 and PH720/PH721 Micromanometer, Back View

Display

Keypad

AC Adapter

Connection

RS232 Port

For Future Use

Probe Connector

Headphone

Connection

Battery

Compartment

Airflow

Inlet/Outlet

Chapter 1: Introduction 3

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.

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).

4 Electronic Balancing Tool EBT720/EBT721 and ProHood PH720/PH721

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