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Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 29
4.2 Using the Data Entry and Function Buttons
Data Entry Buttons: The __ arrow buttons select options from the
menu currently being displayed on the VFD screen. The selected option
blinks.
When the selected option includes a modifiable item, the __ arrow
buttons can be used to increment or decrement that modifiable item.
The Enter button is used to accept any new entries on the VFD
screen. The Escape button is used to abort any new entries on the VFD
screen that are not yet accepted by use of the Enter button.
Figure 4-1 shows the hierarchy of functions available to the
operator via the function buttons. The six function buttons on the
analyzer are:
• Analyze. This is the normal operating mode. The analyzer
monitors the oxygen content of the sample, displays the
percent of oxygen, and warns of any alarm conditions.
• System. The system function consists of seven sub functions
that regulate the internal operations of the analyzer:
• Track or hold values during calibration
• Auto-Cal setup
• Password assignment
• Self -test initiation
• Checking software version
• Logging out.
• Show Negative
• Zero. Used to set up a zero calibration.
• Span. Used to set up a span calibration.
• Alarms. Used to set the alarm setpoints and determine
whether each alarm will be active or defeated, HI or LO
acting, latching, and/or failsafe.
• Range. Used to set up three analysis ranges that can be
switched automatically with auto-ranging or used as
individual fixed ranges.