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Model 9110TH NOx Analyzer Introduction
Teledyne Analytical Instruments 23
1. INTRODUCTION, FEATURES AND OPTIONS
1.1. OVERVIEW
The Model 9110T Nitrogen Oxides Analyzer uses chemiluminescence detection, coupled with
state-of-the-art microprocessor technology to provide the sensitivity, stability and ease of use
needed for ambient or dilution CEM monitoring requirements of nitric oxide (NO), nitrogen
dioxide (NO
2
) and the total nitrogen oxides (NOx). The instrument:
Calculates the amount of NO present by measuring the amount of chemiluminescence given off
when the sample gas is exposed to ozone (O3).
Uses a catalytic-reactive converter to convert any NO2 in the sample gas to NO, which is then
measured as above (including the original NO in the sample gas) and reported as NOx.
Since the density of the sample gas effects the brightness of the chemiluminescence reaction, the 9110T
software compensates for temperature and pressure changes.
Stability is further enhanced by an Auto-Zero feature which periodically redirects the gas flow through
the analyzer so that no chemiluminescence reaction is present in the sample chamber. The analyzer
measures this “dark” condition and uses the results as an offset, which is subtracted from the sensor
readings recorded while the instrument is measuring NO and NO
X
. The result gives a sensitive, accurate,
and dependable performance under the harshest operating conditions.
The 9110T analyzer’s multi-tasking software gives the ability to track and report a large number of
operational parameters in real time. These readings are compared to diagnostic limits kept in the
analyzers memory and should any fall outside of those limits the analyzer issues automatic warnings.
Built-in data acquisition capability, using the analyzer's internal memory, allows the logging of multiple
parameters including averaged or instantaneous concentration values, calibration data, and operating
parameters such as pressure and flow rate. Stored data are easily retrieved through the rear panel serial
or Ethernet ports via our APICOM software or from the front panel, allowing operators to perform
predictive diagnostics and enhanced data analysis by tracking parameter trends. Multiple averaging
periods of one minute to 365 days are available for over a period of one year.
1.2. FEATURES
Some of the other exceptional features of your 9110T Nitrogen Oxides Analyzer are:
Ranges, 0-50 ppb to 0-20 ppm, user selectable
Independent ranges and auto ranging
Large, vivid, and durable graphics display with touch screen interface
Microprocessor controlled for versatility
Multi-tasking software to allow viewing test variables while operating
Continuous self checking with alarms
Permeation dryer on ozone generator
Bi-directional RS-232, optional USB and RS-485, and 10/100Base-T Ethernet ports for remote
operation
Front panel USB ports for peripheral devices and firmware upgrades
Digital status outputs to provide instrument operating condition
Adaptive signal filtering to optimize response time