Physical Range Versus Analog Output Reporting Ranges - Teledyne 100E Instruction Manual

Operating Instructions
All three outputs can be configured either at the factory or by the user for full scale
outputs of 0.1 VDC, 1VDC, 5VDC or 10VDC. Additionally A1 and A2 may be equipped
with optional 0-20 mADC current loop drivers and configured for any current output
within that range (e.g. 0-20, 2-20, 4-20, etc.). The user may also adjust the signal level
and scaling of the actual output voltage or current to match the input requirements of
the recorder or datalogger (See Section 6.7.4.3).
The A1 and A2 channels output a signal that is proportional to the O
the Sample Gas. Several operating modes are available which allow them to operate
independently or be slaved together (see Section 6.5.3). The user may also select
between a variety of reporting range spans (see Sections 6.5.2, 6.6.4 and 6.5.5) as well
as
EXAMPLE:
A1 OUTPUT: Output Signal = 0-5 VDC representing 0-1000 ppm concentration
values
A2 OUTPUT: Output Signal = 0 – 10 VDC representing 0-500 ppm concentration
values.
Additionally, these two outputs can be configured.
The output, labeled A4 is special. It can be set by the user (see Section 6.7.10) to
output any one of the parameters accessible through the <TST TST> keys of the units
Sample Display.
Output A3 is not available on the Model 100E Analyzer.

6.5.1. Physical Range versus Analog Output Reporting Ranges

The M100E UV Fluorescence SO
SO concentrations between 0 and 20,000 ppb. The low range is 0 to 2,000 ppb, while
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the high range is 0 to 20,000 ppb. The proper physical range is determined by the
software to include the maximum measurement concentration selected by the user. Once
properly calibrated, the analyzer's front panel will accurately report concentrations along
the entire span of its 0 and 20,000 ppb physical range.
Because, most applications use only a small part of the analyzer's two physical ranges,
the width of the Model 100E's physical range can create data resolution problems for
most analog recording devices. For example, in an application where the expected
concentration of SO
only 0.25% of the instrument's 20,000 ppb physical range. Unmodified, the
corresponding output signal would also be recorded across only 0.25% of the range of
the recording device.
The M200E solves this problem by allowing the user to select a scaled reporting range for
the analog outputs that only includes that portion of the physical range relevant to the
specific application. Only the reporting range of the analog outputs is scaled, the physical
range of the analyzer and the readings displayed on the front panel remain unaltered.
64
Analyzer has two hardware physical range that cover
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is typically less than 500 ppb, the full scale of expected values is
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Model 100E Instruction Manual
concentration of
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