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TSI Instruments AIRFLOW Instruments ProHood PH721 - User Manual

TSI Instruments AIRFLOW Instruments ProHood PH721
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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

Table of Contents

Questions and Answers

  • P
    Paul SmithSep 3, 2025
    What does Error Code 32 indicate on a TSI Instruments Power Tool?
    • M
      Melinda WarrenSep 3, 2025
      If your TSI Instruments Power Tool displays Error Code 32, it means that while performing user calibration of the accessory temperature/humidity probe, the correct probe was not found. The accessory temperature/humidity probe was either not plugged in or is faulty.
  • M
    Melissa JohnsonSep 2, 2025
    What does Error Code 31 mean on a TSI Instruments Power Tool device?
    • N
      nortonjosephSep 2, 2025
      If your TSI Instruments Power Tool displays Error Code 31, it means the pressure calibration voltage at 5 in. H2O must be less than the pressure calibration voltage at 15 in. H2O. Make sure calibration pressures are correct.
  • T
    Timothy JonesSep 1, 2025
    What does Error Code 30 mean on my TSI Instruments Power Tool?
    • C
      Christian ReynoldsSep 2, 2025
      If your TSI Instruments Power Tool displays Error Code 30, it indicates that the pressure calibration voltage at 1 in. H2O must be less than the pressure calibration voltage at 5 in. H2O. Ensure that the calibration pressures are correct.
  • D
    Donald RodriguezAug 31, 2025
    What does Error Code 36 indicate on a TSI Instruments Power Tool?
    • D
      Daniel SmithAug 31, 2025
      If your TSI Instruments Power Tool displays Error Code 36, it means the flap closed pressure was less than the flap open pressure, or the flap open versus flap closed pressure ratio exceeds allowed limits. Try taking the data again.
  • S
    sharon62Aug 31, 2025
    What does Error Code 35 mean on a TSI Instruments Power Tool?
    • C
      Christy CardenasAug 31, 2025
      If your TSI Instruments Power Tool shows Error Code 35, it indicates that the barometric pressure measured was greater than 40.00 in. Hg. This means the barometric pressure is too high to take a reading.
  • A
    Adrian NormanAug 30, 2025
    What does Error Code 34 signify on a TSI Instruments Power Tool?
    • T
      tthomasAug 30, 2025
      If your TSI Instruments Power Tool displays Error Code 34, it means the barometric pressure measured was less than 15.00 in. Hg. The barometric pressure is too low to take a reading.
  • K
    kevinaustinAug 29, 2025
    What does it mean when my TSI Instruments Power Tool shows '8888' flashing?
    • B
      Brandi ArnoldAug 29, 2025
      If the display on your TSI Instruments Power Tool is flashing “8888”, it means the temperature is too high to measure. Check the specifications page for the maximum temperature.
  • A
    Amanda HamiltonAug 28, 2025
    What does error code 11 mean on my TSI Instruments Power Tool?
    • C
      Christopher AndersonAug 28, 2025
      If your TSI Instruments Power Tool shows Error Code 11, it indicates that the AC adapter voltage is too high. Ensure you are using the correct AC adapter.
  • E
    Elizabeth WellsAug 27, 2025
    What does Error Code 10 mean on a TSI Instruments Power Tool?
    • B
      Brian HardinAug 27, 2025
      If your TSI Instruments Power Tool is showing Error Code 10, it means that the AC adapter voltage is too low. You should use the correct AC adapter.
  • A
    audrey08Aug 27, 2025
    Why is '888888' flashing on the display of my TSI Instruments Power Tool?
    • B
      bankswilliamAug 27, 2025
      If your TSI Instruments Power Tool displays “888888” flashing, it indicates that the pressure is too high to measure, or if measuring velocity or flow, the pressure at that velocity is too high. Refer to the specifications page to check the maximum pressure.

Summary

LIMITATION OF WARRANTY AND LIABILITY

Service Policy

Information on contacting customer service for instrument issues and repairs.

Chapter 1. Introduction

Instrument Description

Provides a detailed overview of the components included with the EBT/PH models.

Chapter 2. Unpacking and Setting Up

Preparing the Instrument for Use

Guides on preparing the instrument before operation, including power source selection.

Power the Micromanometer with the AC Adapter

Instructions on how to power the micromanometer using the AC adapter.

Power the Micromanometer with Batteries

Details on powering the micromanometer using AA-size batteries.

Chapter 3. Getting Started

Keypad Operation

Explains the function of each key on the micromanometer keypad for operation.

Chapter 4. How To

Select a Tool;Probe

Guides on selecting the appropriate measurement device or probe for the task.

Delete Sample Data

Options for deleting all sample data, data for a specific Test ID, or a single sample.

Select;Set a K-factor for a Tool

How to enter or adjust K-factors to calibrate velocity and flow measurements.

Turn Back Pressure Compensation On and Off

Instructions on enabling or disabling back pressure compensation for accurate flow readings.

Take Back Pressure Compensated Hood Readings

Step-by-step procedure for performing back pressure compensated flow measurements.

Calibrate the Micromanometer (User Calibration)

Procedures for performing user calibration of the micromanometer's sensors.

Select User Calibration or Factory Calibration

Option to switch between user-calibrated and factory-calibrated settings.

Connect and Download Data to a Computer

Instructions for connecting to a PC and downloading data using software.

Data Acquisition (Polling)

Details on using the polling command for real-time data acquisition.

Chapter 6. Flow Measurements Using the Capture Hood

Non-Backpressure Compensated Measurements

Procedures for taking flow measurements without back pressure compensation.

Single Measurements

How to initiate and take individual flow measurements.

Running Average Measurements

Steps for taking and holding running average flow measurements.

Backpressure Compensated Measurements

Detailed steps for performing accurate flow measurements with back pressure compensation.

Chapter 7. Maintenance and Troubleshooting

Calibration

Information on annual calibration services and shipping procedures.

Troubleshooting the Instrument

Common symptoms, possible causes, and corrective actions for instrument issues.

Error Codes

Lists specific error codes, their causes, and recommended corrective actions.

Appendix A. Back Pressure

Verifying Flow Measurements

Recommended practices for verifying flow measurements using alternate methods.

Specifications

TSI Instruments AIRFLOW Instruments ProHood PH721 Specifications

General IconGeneral
Data LoggingYes
Storage Temperature14 to 140 °F (-10 to 60 °C)
Battery TypeFour size AA batteries or optional AC adapter
Measurement Range50 to 2500 fpm (0.25 to 12.7 m/s)
Accuracy (Air Velocity)±3% of reading
DisplayLCD

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