Esco Ascent max - Recertification & Calibration; Certification Flowchart

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DuctlessFumeHoods
Chapter6–Recertification&Calibration
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Ductlessfumehoodgenerallyrequirere‐certification,when:
• Thehoodisre‐located
• Hood’sperformanceissuspected
• Afterfilterorblowerreplacement
• Atleastonceayear
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Duringrecertification:
• Cabinetairflowvelocitiesandflowpatternsareverifiedagainstthemanufacturer’sspecificationsand
relevantinternational
standards
• Filtersarescan‐testedtoensuretheydonotleak
• Operatorcomforttestsmaybeperformed
• Ifairflowvelocitiesarefoundtobeoffsetpoint,adjustmentsaremadeaspartofthecertification
processbeforefinalvaluesarerecorded.
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Airflowalarmcalibration,when:
• The
causeoftheairflowalarmcannotbedetermined
• Re‐certificationindicatesthedisplayedairflowdeviatesby>0.02m/s(4fpm)fromactualmeasured
velocities.
6.1CertificationFlowchart
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