Michell Instruments QMA401, User Manual

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QMA401 User’s Manual
Michell Instruments ix
Calibration (Factory Validation)
Prior to shipment, the instrument undergoes stringent factory calibration to traceable standards.
Due to the inherent stability of the instrument, regular factory calibration is not required under
normal operating conditions. The instrument should perform reliably for many years with just basic
maintenance, housekeeping and regular field calibrations from the internal reference (moisture
generator) or a known external reference.
There are, however some consumables that will require periodic replacement.
• Moisture generator - typical lifetime of around 3 years.
• Desiccant column - typical lifetime of around 2 years, but this strongly
depends on the moisture content of the sample gas. The drier the sample
gas, the longer the lifetime of the desiccant.
Michell Instruments can provide a fully traceable factory calibration service for the instrument and it
is recommended that this is considered at intervals of every year of the analyzer's life. Please contact
your local Michell Instruments' office or representative for further details (www.michell.com).
Repair and Maintenance
Apart from user-replaceable components required for routine operational maintenance described
above, the analyzer must only be maintained either by the manufacturer or an accredited service
agent. Refer to www.michell.com for details of Michell Instruments’ worldwide offices contact
information.