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Critical Checks• Leak Check, Flow Check, Nozzle Cleaning!• The flow system should be calibrated or verified on aregular basis. Flow errors affect the concentration.• A leak check is performed with every flow check.Leaks cause measurement errors, and the unit cannotautomatically detect a leak.• The nozzle and support vane must be cleaned toprevent leaks and tape damage.• The nozzle and vane may need to be cleaned morefrequently in humid environments.6/9/2009 27