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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
5.2 Sample Mode
The M200A software has two major operating modes, the SAMPLE mode and the SETUP mode.
The SAMPLE mode is the normal mode when the instrument is taking data. The SETUP mode is
used when the instrument is initially installed, or when problems indicate a need for diagnostics.
One of the features of the SAMPLE mode is TEST functions. The TEST functions can be
examined while the instrument is taking data, and can be used to determine if the instrument is
set up and functioning properly.
Section 5.2.1 defines each TEST function and explains its use.
5.2.1 Test Functions
NOTE
In any of the following TEST functions, if a value of
XXXX is displayed, that indicates an off scale and
therefore meaningless reading.
To use the TEST functions to diagnose instrument faults, refer to Troubleshooting Section 9.1.
Range
The M200A can operate in one of three range modes:
1. In single range mode there is one range for all 3 outputs. This is the default range mode.
2. Independent range mode allows different ranges for each output. When enabled, there are
three range values displayed, NO, NO
x
and NO
2
.
3. Auto range mode allows a low range and high range. The M200A will automatically
switch to the other range dynamically as concentration values require. The TEST values will
show the range the instrument is currently operating in, and will dynamically display the
alternate range as the range changes occur.
NOTE
Each of the range modes Single range, Autorange, and
Independent ranges are mutually exclusive.
5-8
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