Operation - Teledyne 3350 Operating Instructions Manual

Alarm Oxygen Monitor
Preliminary—If not already done: Power up the Analyzer and
Procedure:
1. Expose the sensor to ambient air or instrument grade air (20.9%
2. Press the SPAN button once.
3. Immediately (within 5 seconds) press either the Δ or ∇ button
The unit is now calibrated. (also see section 4 operation)
Note: The alarms will be disabled for about 25 seconds after the SPAN
button is released. Disabling the alarms allows air to be cleared from
the sensor without tripping any alarm set below span (20.9%).

3.7 Operation

Once the instrument has been installed, calibrated, and the power turned
on, it will continuously monitor the oxygen level within the environment it is
placed. The oxygen level is displayed on the digital meter. The response
time of the instrument will depend on the actual Micro-Fuel Cell (MFC)
installed. With the class B-3 MFC installed, the response time is less than 15
seconds at 25°C. The table below indicates the response time for some
MFCs typically used in the Model 3350.
ment when calibrated using the monitored atmosphere
or a span gas of unknown composition, will be meaning-
less.
allow the LED reading to stabilize.
oxygen). Allow time for the analyzer to achieve equilibrium.
until the display is stable and reads 20.9%.
Figure 3-6 Front Panel Membrane (Control Unit)
Teledyne Analytical Instruments
Installation 3
3-9