Teledyne 2120XL, Operating Instructions Manual, Page: 16 / 85

Introduction Model 2120XL
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 nitrogen content in an argon
gas mixture.
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:
◄► Select between functions currently displayed on
the VFD screen.
▲▼ 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 also used to abort an entry.
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 0-10,000 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.