Teledyne 3190Z - Zirconium oxide trace oxygen analyzer - Manual (Page 26)

Operation Model 3190Z
Teledyne Analytical Instruments 18
4.2 Using the Function and Data Entry Buttons
When one of the function buttons is being pressed, the analyzer is
in the Setup mode or the Calibration mode.
The four setup function 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 (
Δ and ∇) adjust the value displayed on the
TRACE OXYGEN meter while one of the function buttons is being held
down.
• Δ : Increments the displayed value upwards.
• ∇ : Increments the displayed value downwards.
Any of the functions can be selected at any time by pressing 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 from 0-10 ppm to 0-1,000 ppm oxygen concentration.
The analyzer automatically switches from the LO range to the
HI range when the oxygen concentration reaches the LO range full-
scale value. It will switch back to the LO range when the oxygen
concentration falls below the LO range full-scale value
Note: The HI Range set-point MUST be set at a higher
concentration than the LO Range set-point.