TSI Alnor EBT720, EBT721 Operating Manual

OWNER’S MANUAL

Alnor® Electronic Balancing Tool

Models EBT720/EBT721

and

IRFLOW™ 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 logo, Alnor®, AIRFLOW™ Instruments, and ProHood™ are trademarks of TSI Incorporated.

TSI

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

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

HILE USING THE BALOMETER® AIR BALANCING INSTRUMENT TO TEST AIR

FLOW IN DUCTS

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

DUST ARE OR MAY BE SENSITIVE TO DUST AIRBORNE CONTAMINANTS RESPIRATOR WHILE EMPLOYING 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.

, YOU MAY COME INTO CONTACT WITH OR BE EXPOSED TO

, POLLEN, MOLD, FUNGUS, OR OTHER

, ALWAYS USE AN APPROPRIATE MASK OR

BALOMETER

AIR BALANCING

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) 651490-2811 (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.

iii

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

HILE USING THE BALOMETER® AIR BALANCING INSTRUMENT TO TEST AIR

FLOW IN DUCTS

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

DUST ARE OR MAY BE SENSITIVE TO DUST AIRBORNE CONTAMINANTS RESPIRATOR WHILE EMPLOYING THE INSTRUMENT

, YOU MAY COME INTO CONTACT WITH OR BE EXPOSED TO

, POLLEN, MOLD, FUNGUS, OR OTHER

, ALWAYS USE AN APPROPRIATE MASK OR

BALOMETER

AIR BALANCING

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 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.

tubing, user manual, CompuDat™ for Windows® data

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

3 and 4 for 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.

Keypad

C Adapter

Connection

RS232 Port

For Future Use

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

irflow

Inlet/Outlet

Display

Headphone Connection

Probe Connector

Battery Compartment

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

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

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).

Chapter 1: Introduction 3

Chapter 2. Unpacking and Setting Up

This chapter describes unpacking and setting up (preparing) the Electronic Balancing Tool (EBT) or ProHood matrix measuring the face velocity on a laboratory hood.

Unpacking

™ capture hood for use. Figure 3 shows a picture of the Model EBT720/PH720 with a velocity

Figure 3: Model EBT720/PH720 with Velocity Matrix

As you unpack the instrument and accessories, check the components against your packing list. If any parts are missing or damaged, notify us immediately. Tables 1 and 2 list available standard and optional components.

Table 1: List of Standard and Optional Components

Item Part No.

Models EBT720 and EBT721 Electronic Balancing Tools (Alnor)

Models PH720 and PH721 ProHood™ capture hood (AIRFLOW™ Instruments) PH720

Carrying case, EBT720/PH720 1319378 Carrying case, wheeled hood kit, EBT721 1319379 AA-size NiMH battery, four required 1208048 Operation and Service Manual 1980497 Velocity Matrix Add On Kit 801090 Air Flow Probe 800187 Temperature Probe (AIRFLOW™ Instruments) 800208 Temperature and Humidity Probe (AIRFLOW™ Instruments) 800209 Temperature Probe (Alnor) 800188 Temperature and Humidity Probe (Alnor) 800189

EBT720-XXX EBT721-XXX

PH721

Table 2: List of Optional Hood Components

Item Part No.

1 ft × 4 ft (305 mm × 1220 mm) and 2 ft × 4 ft (610 mm × 1220 mm) fabric hood and frame kit

1 ft × 5 ft (305 mm × 1525 mm) and 3 ft × 3 ft (915 mm × 915 mm) fabric hood and frame kit

1 ft × 4 ft (305 mm × 1220 mm) fabric hood and frame kit 2 ft × 4 ft (610 mm × 1220 mm) fabric hood and frame kit 1 ft × 5 ft (305 mm × 1525 mm) fabric hood and frame kit 3 ft × 3 ft (915 mm × 915 mm) fabric hood and frame kit 8 in. × 21 in. (203 mm × 533 mm) BSC fabric hood, frame, poles, and stand kit 10 in. × 21 in. (254 mm × 533 mm) BSC fabric hood, frame, poles, and stand kit

Please complete the registration card included with this product and mail it promptly. The card allows us to inform you of product updates. If you prefer, register through the

Alnor web site or AIRFLOW web site.

801206

801207

801200 801201 801202 801203 801204 801205

Preparing the Instrument for Use

Before you can use the Electronic Balancing Tool, you must decide on a power source.

Power the Micromanometer with the AC Adapter

When the AC adapter is plugged into the micromanometer, the unit automatically turns on, runs a brief diagnostic check, and briefly lights all segments of the display. It then displays the type of batteries the unit is set to use (alkaline or rechargeable NiMH) and turns itself OFF.

Whenever the AC adapter is plugged into the micromanometer, the rechargeable batteries are recharged. (Assuming you are using rechargeable batteries and the switch inside the battery compartment is set to NiMH. See below.)

Power the Micromanometer with Batteries

When not using the AC adapter, the Electronic Balancing Tool or ProHood™ capture hood requires four AA-size batteries to operate. These can be either alkaline batteries or rechargeable NiMH batteries. For your convenience, four NiMH batteries are included with the EBT/PH.

To select the type of batteries you are using:

1. Turn the unit off and locate the battery cover on the back of the micromanometer (see Figure 4).

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

Figure 4: Battery Cover Removal

Press down on the compartment cover and slide it down. (The cover slides off.)

3. Remove the battery holder by pulling up on the bottom (to loosen it) and then pulling the battery

holder free.

4. Refer to Figure 5 and set the battery selection switch to indicate the type of batteries you are using.

Battery Selection Switch

Figure 5: Location of Battery Type Selector Switch

5. Reinstall the battery holder and replace the battery compartment cover.

To install replacement batteries:

1. Turn the unit off and locate the battery cover on the back of the micromanometer (see Figure 4).

2. Press down on the compartment cover and slide it down. (The cover slides off.)

3. Remove the battery holder by pulling up on the bottom (to loosen it) and then remove the battery

holder.

Chapter 2: Unpacking and Setting Up 7

4. Remove the old batteries and replace with fresh batteries (alkaline or rechargeable NiMH). Make

certain batteries are correctly oriented.

5. Verify the battery selection switch is correctly set (see Figure 5).

6. Reinstall the battery holder and replace the compartment cover.

Note: Make sure the battery holder is oriented so that its terminals make contact with the spring

contacts in the battery compartment.

If fresh, new alkaline batteries are used, the battery indicator will show 4 bars when first turned on. With NiMH batteries, the indicator may show a lower value even when they are fully charged.

Notes: The percent power remaining will not be accurate for NiMH batteries because their voltage

does not decrease linearly with power use.

Due to the danger of battery leakage, remove batteries from the battery compartment before storage. Never mix battery types.

The NiMH batteries should only be charged at room temperature. Starting with batteries that are too cold or too warm can cause the charge cycle to stop early.

Connecting the Pitot Tube to the Micromanometer

The static pressure port (-) on the pitot tube will be connected to the negative pressure (-) port on the micromanometer, and the total pressure port (+) on the pitot tube will be connected to the positive (+) port on the micromanometer (see

Figure 6).

Total Pressure Port (+)

Static Pressure Port (–)

Figure 6: Pitot Tube

Connecting the Static Pressure Port to the Micromanometer

The static pressure port on the static pressure probe will be connected to the (+) port on the micromanometer. The (-) port on the micromanometer will be open to atmosphere (see

Figure 7).

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

Magnet

Static Pressure Port

Figure 7: Static Pressure Probe

Attaching the Micromanometer to the Capture Hood Base

1. Tilt the meter forward and align the tabs in the base of the meter with the two matching slots in the

bottom of the recessed area at the front of the base (see

2. When the tabs are engaged in the slots, press firmly on the face of the meter above the display until

the tab in the top center of the meter “clicks” into the bent metal retaining clip in the base.

Figure 8).

3. Attach the temperature cable and the back pressure flap switch cable to the right side of the meter.

4. To remove the meter from the base, first disconnect the temperature cable and the back pressure flap

switch cable, then press upward on the metal retaining clip to release the meter from the base.

Figure 8: Attaching the Meter to the Capture Hood Base

Connecting the Velocity Matrix to the Micromanometer

The positive port (+) is located on the side of the Velocity Matrix that is opposite the handle assembly. The positive port (+) on the Velocity Matrix will be connected to the (+) port on the micromanometer, and the negative port (-) on the Velocity Matrix is connected to the (-) port on the micromanometer.

Standoffs can be screwed together to make different lengths and are used to maintain a fixed and level orientation away from a filter. The standoffs are attached to the positive (+) side of the velocity matrix.

Chapter 2: Unpacking and Setting Up 9

The handle assembly is attached to the downstream or negative (-) side in the center of the velocity matrix

Figure 9).

(see

Standoffs Positive Port (+)

Negative Port (–)

Handle

Figure 9: Velocity Matrix

Connecting the Air Flow Probe to the Micromanometer

The static pressure port (-) on the Air Flow Probe will be connected to the negative pressure (-) port on the micromanometer, and the total pressure port (+) on the Air Flow Probe will be connected to the positive (+) port on the micromanometer (see

Figure 10).

Note: Observe the arrow indicator on the Air Flow Probe when taking air velocity or air volume

measurements.

Total Pressure Port (+)

Static Pressure Port (–)

Figure 10: Air Flow Probe

Connecting the Temperature Probe or Temperature and Humidity Probe to the Micromanometer

The Temperature probe and Temperature/Humidity probe attach to the 8-pin connector located on the right hand side of the micromanometer. When connecting the probe to the meter, the dimple on the connector must be aligned to fit the receptacle indentation on the meter (see

Figure 11).

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

Match key on plug to detent on receptacle

Figure 11: Connector for the Temperature Probe or Temperature/Humidity Probe

Chapter 2: Unpacking and Setting Up 11

Chapter 3. Getting Started

This section provides information to help you quickly become familiar with the Models EBT720/EBT721 and PH720/PH721 Sample readings.

Keypad Operation

The keypad lets you enter information, initiate functions, and change values stored in the micromanometer. It will be helpful before operating the micromanometer to understand more fully what each of the keys do.

W X T andS

The arrow keys let you navigate through menus or select options. Generally only one set of arrow keys (S,T or W,X are operational for any given operation. Use W and X to move through menus; use S and T to increase or decrease a value.

ESC

The ESCAPE key is used to cancel or end an operation or back up to the last screen of displayed information. The ESC key is useful if you press

The ENTER key is used to accept the present value or move to the next level of a menu.

READ

If the display mode is set to SINGLE, pressing the READ key begins a reading, which stops automatically when the reading is done.

Micromanometer functions. It also includes step-by-step instructions for taking

and realize you meant to use one of the other keys.

If the display mode is set to RUNAVG, the micromanometer will measure continuously, and pressing READ will alternately pause or resume the measurement. (See to SINGLE or RUNAVG.)

There is a red button on the capture hood base that has the same function as the READ key.

Note: Pressing the READ key will not store any measurement to memory.

SAVE

The SAVE key is used to save the currently displayed measurement to the data logging memory.

NEXT TEST

The NEXT TEST key is used to select a new unused Test Id for saving Samples when logging data.

The PRINT key downloads data to an optional printer or to a computer. Refer to information on downloading data.

STATS

The STATISTICS key lets you display COUNT, MINimum, MAXimum and AVeraGe for the Test ID currently selected for logging data.

Chapter 4 on how to set the display mode

Chapter 4 for

I/O

The ON/OFF key is used to turn the micromanometer on or off.

The BACKLIGHT key turns the display’s backlighting on and off. Use backlighting only when working in areas where you cannot read the display with existing light. Backlighting has a significant impact on battery life.

Common Terms

In this manual there are several terms that are used in different places. The following is a brief explanation of the meanings of terms.

Sample

A Sample consists of all of the measurement parameters stored each time the SAVE key is pressed, or after each logging interval has passed. The maximum number of Samples is 1000.

Logging Interval

The Logging Interval is the frequency period that the micromanometer will log readings, when logging is set to CONTIN (continuous). For example, if logging is set to CONTIN and the logging interval is set to 60 seconds, a Sample can be taken and saved automatically every 60 seconds. Refer to chapter 4 for more information on continuous data logging.

Test ID

A Test ID consists of a group of Samples. A Test ID can contain up to 1000 Samples. The maximum number of Test IDs is 255.

Any new Sample will be saved to the current Test ID. You can change the current Test ID at any time to keep your data organized, refer to instructions in

The unit does not allow you to store Samples of different character in the same Test ID. If the READ key is pressed after changes have been made to the Tool or display units or some other parameter, TEST ID flashes on the display and a new unused TEST ID is selected.

In addition to the data for each Sample, the statistics that are available to view by TEST ID are:

SUM - The sum of all stored values in that TEST ID. (SUM is only available for hood flow or Diffuser Flow [flow from pressure and K-Factor])

MINIMUM - The lowest value stored in that TEST ID

MAXIMUM - The highest value stored in that TEST ID

AVERAGE - The SUM divided by the number of Samples

COUNT - The number of Samples in that TEST ID

Once you have collected data in a Test ID, you can send it to a printer or a computer. See instructions for downloading data in

Chapter 4.

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

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