Teledyne 3350 - Microprocessor based control room monitor for personnel safety - Manual (Page 29)

Alarm Oxygen Monitor Operation 4
4-1 Teledyne Analytical Instruments
Operation
4.1 Using the Span 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 that is flowing
around the Probe.
When one of the Function Buttons is being pressed, the Analyzer is in
the Setup mode or the Calibration mode.
The Calibration mode button is:
• SPAN
The Data Entry buttons (
Δ and ∇) increment the values displayed on
the PERCENT OXYGEN meter while one of the Function buttons is being
held down.
•
Δ : Increments the displayed value upwards.
•
∇ : Increments the displayed value downwards.
The Span function can be selected at any time by holding down the
appropriate button.
Figure 4-1 Front Panel Membrane (Control Unit)