4.0 OPERATION
4.1 Turning ON the Instrument
Turn ON the instrument by rotating its thumb-wheel switch
(Fig 3) clockwise until a click is heard. Observe the following:
• The Power LED lights.
• The Fail LED will light, but should turn off in a few sec-
onds if the sensor is good and properly seated in its
socket.
• If the Low Bat. LED is on, replace the batteries per Sec-
tion 3.0 Battery Installation.
After the instrument stabilizes, rotate the Gain control in the
direction necessary to cause the bottom Gas Level LED to just
turn off. Be sure to always set this control in the same
environment you intend to test in.
The instrument is now ready for use.
4.2 Taking a Gas Reading
To verify that the instrument is operating, sample a known
combustible gas (e.g., a gas-air mixture from an unlit burner
of a natural-gas range). If no response is observed or heard,
refer to Section 6.0 Troubleshooting.
Important! The sensor becomes less sensitive
after being exposed to an excessive amount of
gas. Therefore, after testing the instrument as
described above, leave it on for several minutes
to restabilize the sensor.
Operation
6
Leakator 10
Instruction 19-9167
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