5200 Multi Purpose and 5200 Multi Purpose HF Gas Analysers
05230001A / Revision 9
35
6 GENERAL OPERATION
6.1 Calibrating the Multi Purpose
WARNING
This gas analyser may be used with sample and/or calibration gases that
could present a toxic hazard, as the local gas concentrations may exceed
short- or long-term exposure limits (and very high dilution rates may be
needed to safely vent the gases used). You must therefore ensure that
you are fully aware of the potential hazards of the gases used, carry out
your own risk assessment and create suitable safe working practices
based on these hazards, and ensure that these working practices are
complied with whenever the analyser is used. If in doubt about the
potential hazards of the gases to be used with the analyser, seek expert
advice from appropriate specialists/safety consultants.
CAUTION
Sample and calibration gases must be as specified in Sections 2.2 and 2.3. If
your sample or calibration gas pressures and/or flow rates are above those
specified in Sections 2.2 and 2.3, you must regulate the gases externally,
before they enter the Multi Purpose.
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The pressure of your calibration gas supply must be the same as the
pressure of the gases to be sampled. If the pressures are different, sample
gas measurements may not be accurate.
+
For a Multi Purpose HF, the calibration gas flow rate should be as close as
possible to the flow rate of sample gases.
+
If you do not allow calibration gas to pass through the Multi Purpose for 3 to
5 minutes before you start the calibration procedure, the measurement
system in the Multi Purpose may not be fully purged of other residual gases,
and the calibration may not be accurate.
+
Do not knock or move the Multi Purpose during calibration. If you do, the
calibration measurements may be affected.
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For a standard Multi Purpose with a sample pump, the following calibration
procedure assumes that you have selected manual pump operation. If you
have selected timed pump operation, you must ensure that the pump
operation time is set correctly to allow calibration gas to pass through the
Multi Purpose for sufficient time: refer to Section 5.3.5 for more information.
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For a Multi Purpose HF, no calibration ‘T’ piece is supplied and no such T’
piece should be used. You must not switch on the Multi Purpose HF sample
pump at any time during the calibration procedure.
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The calibration procedure in this section is for a Multi Purpose without an
optional flowmeter or sample conditioning panel. If your Multi Purpose has
one of these options, refer to the appropriate Appendix A6 or Appendix A7
for additional information on calibration.
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