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CALIBRATION PROCEDURES Model 400E Ozone Analyzer
Instruction Manual
164 P/N 04316 Rev: B
NOTE
Throughout this chapter are various diagrams showing pneumatic connections
between the M400E and various other pieces of equipment such as calibrators and
zero air sources. These diagrams are only intended to be schematic
representations of these connections and do not reflect actual physical locations of
equipment and fitting location or orientation. Contact your regional EPA or other
appropriate governing agency for more detailed recommendations.
7.1. Before Calibration
The calibration procedures in this section assumes that the Range Type, Range
Span and units of measure have already been selected for the analyzer. If this has
not been done, please do so before continuing (See Section 6.4 for instructions).
NOTE
If any problems occur while performing the following
calibration procedures, refer to Section 11 of this manual
for troubleshooting tips.
7.1.1.
Required Equipment, Supplies, and Expendables
Calibration of the Model 400E O
3
Analyzer requires certain amount of equipment
and supplies. These include, but are not limited to, the following:
1. Zero-air source.
2. Ozone Span Gas source.
3. Gas lines - All Gas lines should be PTFE (Teflon) or FEP.
4. A recording device such as a strip-chart recorder and/or datalogger
(optional).
7.1.2.
Zero Air and Span Gas
To perform the following calibration you must have sources for Zero Air and Span
Gas available.
Zero Air is similar in chemical composition to the Earth’s atmosphere but scrubbed
of all components that might affect the analyzers readings. For O
3
measuring
devices, Zero air should be devoid of O
3
and Mercury Vapor. It should have a dew
point of -20 ° C.