TPI 721 Instruction Manual

721

Combustible Gas Leak
Detector Instruction Manual

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TABLE OF CONTENTS

A. INTRODUCTION

1. Congratulations ..........................3

2. Product Description....................3

B. SAFETY CONSIDERATIONS ..............4

C. TECHNICAL DATA

1. Features and Benefits..................5

2. Product Applications ..................5

3. Specifications..............................6

D. MEASUREMENT TECHNIQUES

1. Controls and Functions ..............7

2. Step by Step Procedures: ..........9

E. ADDITIONAL FEATURES

..................12

F. TROUBLE SHOOTING GUIDE ..........15

H. MAINTENANCE ................................15

I. ACCESSORIES ................................15

2

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A. INTRODUCTION

1. Congratulations!!

Thank you for purchasing TPI products. The 721 is easy
to use and is built to last. It is backed by a 3 year limit­ed warranty. Please remember to complete and return

your product warranty registration card.

2. Product Description

The ergonomically designed 721 is a hand-held, com­bustible gas leak detector. It is capable of finding com­bustible gas leaks in pipes, fittings, regulators, etc.
Additional features include the capability to display
%LEL, leak level in ppm, and user adjustable alarm
point.

The 721 comes complete with the following accessories:

Carrying Pouch (A780)
Instruction Manual
Battery & Sensor (Installed & Calibrated)

3

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B. SAFETY CONSIDERATIONS

4

WARNING: Please follow manufacturers test
procedures whenever possible. Do not place the
sensor cage located on the end of the gooseneck on

hot or in hot locations.

GENERAL GUIDELINES

ALW

AYS

• Turn your detector on in a “clean air” environment away
from the test location.

• Inspect the sensor cage to ensure it is securely attached.

NEVER

• Place the detector or sensor cage in or on a hot item.

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C. TECHNICAL DATA

1. Features and Benefits

Auto Zero Automatically sets the sensor to

zero at start up.

%LEL Displays the percentage lower explosive

limit (LEL)

PPM Displays the amount of leakage in

parts per million (ppm)

Mute Mutes the speaker and earphone alarm

Zero Manually sets the sensor to zero

Adjustable Alarm point can be set as required
Alarm

Visual Alarm LED’s located on the front and
Alarm in the sensor cage tip

Auto Off When enabled, the 721 turns off after

approximately 20 minutes to saves battery
life. Can be disabled.

2. Product Applications

Perform the following tests and/or measurements with the 721
leak detector:

• Locate combustible gas leaks in joints and fittings.

• Determine Lower Explosive Limit percentage.

• Determine the combustible gas leak level in ppm (parts per
million).

5

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