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B.  SAFETY CONSIDERATIONS

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

ALWAYS

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.

4

5

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).

721 manual_082208.qxd  11/11/2008  7:09 AM  Page 4

Summary of Contents for 721

Page 1: ...721 Combustible Gas Leak Detector Instruction Manual 721 manual_082208 qxd 11 11 2008 7 09 AM Page 1 ...

Page 2: ...atures 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 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 Spe...

Page 3: ...atures 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 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 Spe...

Page 4: ...ys 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 lif...

Page 5: ...ys 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 lif...

Page 6: ...soline Hexane Hydrogen Methane Naphtha Natural Gas Paint Thinners Propane Solvents Display Type Dual display with backlight Display Modes Real ppm Leak Level stepped ppm LEL Ranges Real ppm 0 to 9999ppm Stepped ppm 0 500 1000 3000 5000 9999ppm LEL 0 to 19 9 Audible Leak Indication Adjustable tic rate via side thumb wheel Alarm Indication Visual and audible User adjustable alarm level Sensor Test a...

Page 7: ...soline Hexane Hydrogen Methane Naphtha Natural Gas Paint Thinners Propane Solvents Display Type Dual display with backlight Display Modes Real ppm Leak Level stepped ppm LEL Ranges Real ppm 0 to 9999ppm Stepped ppm 0 500 1000 3000 5000 9999ppm LEL 0 to 19 9 Audible Leak Indication Adjustable tic rate via side thumb wheel Alarm Indication Visual and audible User adjustable alarm level Sensor Test a...

Page 8: ...he 721 will begin a 30 second countdown and wait will display During this countdown the sensor is being self tested and set to zero 2 After the countdown is complete the 721 will display 0 and a tic rate will begin 3 At this point the display mode can be selected Once the dis play mode is selected the 721 will turn on in the same mode each time unless changed If the display mode does not need to b...

Page 9: ...he 721 will begin a 30 second countdown and wait will display During this countdown the sensor is being self tested and set to zero 2 After the countdown is complete the 721 will display 0 and a tic rate will begin 3 At this point the display mode can be selected Once the dis play mode is selected the 721 will turn on in the same mode each time unless changed If the display mode does not need to b...

Page 10: ...ic rate and move along the pipe fitting etc being tested 11 Continue to nulify any increases in tic rate and move along the item being tested until the leak source is located 12 If the leak concentration is above the alarm level the alarm will sound and LED s located in the front panel and sensor cage will flash 10 11 Step by Step Procedures continued 6 Depending on the last display mode selected ...

Page 11: ...ic rate and move along the pipe fitting etc being tested 11 Continue to nulify any increases in tic rate and move along the item being tested until the leak source is located 12 If the leak concentration is above the alarm level the alarm will sound and LED s located in the front panel and sensor cage will flash 10 11 Step by Step Procedures continued 6 Depending on the last display mode selected ...

Page 12: ...Features continued Auto Power Off The auto power off feature can be enabled or disabled as required 1 After the 721 has been turned on and has gone through the warm up period press and hold the key for approximately 3 seconds to enter menu mode The following will be displayed 2 Press the key to enable ys or disable no the auto power off feature 3 Press the key to proceed to the display mode screen...

Page 13: ...Features continued Auto Power Off The auto power off feature can be enabled or disabled as required 1 After the 721 has been turned on and has gone through the warm up period press and hold the key for approximately 3 seconds to enter menu mode The following will be displayed 2 Press the key to enable ys or disable no the auto power off feature 3 Press the key to proceed to the display mode screen...

Page 14: ...lease return your 721 to TPI Attn Service 9615 SW Allen Blvd Suite 104 Beaverton OR 97005 H Accessories Replacement Sensor A739 Soft Pouch A780 Earphone A710 15 14 Additional Features continued Mute Function When the 721 encounters a gas concentration above the alarm set point the alarm will begin to sound Pressing the key will silence the alarm Zero Function If the 721 fails to auto zero the zero...

Page 15: ...lease return your 721 to TPI Attn Service 9615 SW Allen Blvd Suite 104 Beaverton OR 97005 H Accessories Replacement Sensor A739 Soft Pouch A780 Earphone A710 15 14 Additional Features continued Mute Function When the 721 encounters a gas concentration above the alarm set point the alarm will begin to sound Pressing the key will silence the alarm Zero Function If the 721 fails to auto zero the zero...

Page 16: ...104 Beaverton OR 97005 Tel 503 520 9197 Fax 503 520 1225 www tpi thevalueleader com Test Products International Ltd 342 Bronte Road South Unit 9 Milton Ontario Canada L9T5B7 Tel 905 693 8558 Fax 905 693 0888 721 manual_082208 qxd 11 11 2008 7 09 AM Page 16 ...

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