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
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