Introduction 3000ZA
Teledyne Analytical Instruments 4
Function Keys:
Six touch-sensitive membrane switches are used to change the specific
function performed by the analyzer:
• Analyze Perform analysis for oxygen content of a sample
gas.
• System Perform system-related tasks (described in detail
in chapter 4, Operation.).
• Span Span calibrate the analyzer.
• Zero Zero calibrate the analyzer.
• Alarms Set the alarm setpoints and attributes.
• Range Set up the 3 user definable ranges for the
instrument.
Data Entry Keys:
Six touch-sensitive membrane switches are used to input data to the
instrument via the alphanumeric VFD display:
• Left & Right Arrows Select between functions currently
displayed on the VFD screen.
• Up & Down Arrows Increment or decrement values of
functions currently displayed.
• Enter Advances VFD display to the next screen in a series
or returns to the Analyze screen if none remain.
• Escape Backs VFD display to the previous screen in a series
or returns to the Analyze screen if none remain.
Digital Meter Display:
The meter display is a Light Emitting Diode (LED) device that produces
large, bright, 7-segment numbers that are legible in any lighting. It
produces a continuous readout from 0-250 ppm. It is accurate across all
analysis ranges without the discontinuity inherent in analog range
switching.
Alphanumeric Interface Screen:
The VFD screen is an easy-to-use interface from operator to analyzer. It
displays values, options, and messages that give the operator immediate
feedback.
Flowmeter:
Monitors the flow of gas past the sensor. Readout is 0.2 to 2.4 standard