Serinus 51 User manual 1.0
Introduction
3
1.2.7 Physical dimensions
Case dimensions:
• Length: 620mm with no handle (24.4” inches)
• Width: 440mm (17.3” inches)
• Height: 178mm/4RU (7” inches)
Weight: 18.1kg
1.3 Nomenclature
Span: A gas sample of known composition and concentration used to
calibrate/check the upper range of the instrument (Sulfur Dioxide).
Zero: Zero calibration uses zero air (SO
2
scrubbed ambient air) to
calibrate/check the lower range of the instrument.
Background: External signals that can be confused with that of the
signal being measured.
Zero drift: the change in instrument response to zero pollutant
concentration over 12hr and 24hr periods of continuous unadjusted
operation.
Automatic zero: The automatic zero performs a zero check at a
specified time through a 24 hour cycle which adjusts the lower limit of
the analyzers.
Zero air: Purified air in which the combined effect of the
concentration of impurities is less than 1% of the relevant midrange of
the analyzer instrument. Sufficient purified air can be obtained by
passing dry ambient air through an activated charcoal filter and a
particulate filter.
External span source: Span gas that is delivered via an external
accredited cylinder (e.g. NATA/NIST).
Sample Air: Sample air is defined as the sample before it has entered
the reaction cell, as distinguished from the exhaust air.
Exhaust air: Exhaust air is the sample air after it has passed through
the reaction/measurement/detection cell and is moving towards being
expelled from the analyzer.
ID and OD: Measurements of tubing, ID is the internal diameter of
tubing, OD is the outer diameter.
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