4 Operation Model 3190
4-2 Teledyne Analytical Instruments
Buttons
When no buttons on the Analyzer are being pressed, the instrument is in
the Analyze mode. It is monitoring the amount of oxygen in the sample gas
that is flowing through the Remote Probe.
When one of the Function Buttons is being pressed, the Analyzer is in
the Setup mode or the Calibration mode.
The 4 Setup Mode buttons on the analyzer are:

• SET HI ALARM

• SET LO ALARM

• SET HI RANGE

• SET LO RANGE

The Calibration Mode button is:

• SPAN

The Data Entry buttons (∆ and ∇) increment the values displayed on
the TRACE OXYGEN meter while one of the Function buttons is being
held down.
•∆ : Increments the displayed value upwards.
•∇ : Increments the displayed value downwards.
Any of the functions can be selected at any time by holding down the
appropriate button.
Each function will be described in the following sections. Although the
operator can use any function at any time, the order chosen in this manual is
appropriate for an initial setup.
4.3 Setting the Analysis Ranges
The two user definable analysis ranges are both capable of being
adjusted for from 0-10 ppm to 0-9,999 ppm oxygen concentration.
Whatever values are selected, the analyzer automatically switches from
the LO range to the HI range when the oxygen concentration reaches the LO
range fullscale value, and it switches back to the LO range when the oxygen
concentration falls below the LO range fullscale value
Note: For proper operation, the HI Range setpoint should be set at a
higher concentration than the LO Range setpoint.