Teledyne 2120XL, Operating Instructions Manual, Page: 14 / 85

Introduction Model 2120XL
Teledyne Analytical Instruments 2

Quality Control for Truck Fills & Gas Cylinders

Process Control

New Line Certification

Chemical Plants

Welding Gas Management

Semiconductor Manufacturing
1.3 Features
The Model 2120XL comes equipped with the following standard
features:

A 2-line alphanumeric vacuum fluorescent display (VFD)
screen, driven by microprocessor electronics that
continuously prompts and informs the operator.

High resolution, accurate readings of nitrogen content from
low ppm levels through 100 ppm in argon. Large, bright,
meter readout.

Advanced high frequency plasma generator produces stable
electroluminescent discharge with minimal heating yielding a
spectral emission characteristic of the gas mixture.

Custom low-noise optical filter for precise narrow band
selection and low optical interference.

Amplified optics circuit for stable nitrogen detection at low
ppb level.

Microprocessor based electronics: 8-bit CMOS
microprocessor with 32 kB RAM and 128 kB ROM.

Three user definable output ranges (from 0-1 ppm through 0-
100 ppm) allow best match to users process and equipment.

Auto Ranging allows analyzer to automatically select the
proper preset range for a given measurement. Manual
override allows the user to lock onto a specific range of
interest.

Two adjustable concentration alarms and a system failure
alarm.