Teledyne OT-3 - Manual (Page 32)

Operation OT-3
Teledyne Analytical Instruments 24
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 amount 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:
• SET 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.
∆ : UP arrow—increments the displayed value upwards.
∇ : DOWN arrow—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 0-9999 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 full-scale value, and it switches back to the LO range when the
oxygen concentration falls below of the LO range full-scale value
Note: The HI Range setpoint MUST be set at a higher
concentration percentage than the LO Range setpoint.