Teledyne 3300TB - Low cost trace oxygen analyzer - Manual (Page 26)

4 Operation Model 3300 TB
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 anount of oxygen in the sample gas
that is flowing through the sampling system.
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 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 0-10ppm to 0-9999ppm 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 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.