Teledyne 3300PA - Low cost percent oxygen analyzer - Manual (Page 24)

4 Operation Model 3300 PA
4-2 Teledyne Analytical Instruments
4.2 Using the Function and Data Entry
Buttons
When no buttons on the Analyzer are being pressed, the instrument is in
the Analyze mode. It is monitoring the percent 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 function buttons on the analyzer are:
• SET ALARM 1
• SET ALARM 2
• SET HI RANGE
• SET LO RANGE
The Calibration mode button is:
• SPAN
The Data Entry buttons (
∆
and
∇
) increment the values displayed on
the PERCENT 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 0-1% to 0-25% oxygen concentration. Whatever values are
selected, the analyzer automatically switches from the LO range to the HI
range when the oxygen concentration reaches 100% of the LO range
fullscale value, and it switches back to the LO range when the oxygen
concentration reaches 85% of the LO range fullscale value
Note: The HI Range setpoint MUST be set at a higher concentration percent-
age than the LO Range setpoint.