GE Druck DPI 610 User Manual

Also see for Druck DPI 615 IS: User manual User manual

Contents

41 K0430 Issue No. 2GeneralThe instrument is supplied by the manufacturer, complete with calibration certificate(s). Acalibration period of 12 months is recommended. The actual calibration intervaldepends on instrument usage and the total measurement uncertainty acceptable for thespecified application.The DPI 610 IS and DPI 615 IS are very precise measuring instruments and the testequipment and conditions of test must be suitable for the type of work. A Class Acompensated deadweight tester must be used. The calibration check and calibrationadjustment should be carried out in a controlled environment by a calibrationtechnician*.The manufacturer offers a comprehensive and, if required, UKAS accredited calibrationservice.* A calibration technician must have the necessary technical knowledge,documentation, special test equipment and tools to carry out the calibration workon this equipment.Calibration CheckAt the chosen calibration interval, the instrument readings should be compared with aknown pressure standard.The recommended method starts at 0, increasing in 20% steps to 100% full-scale andthen decreasing in 20% steps to 0.Note any deviations between the instrument and the pressure standard and considertraceability (accuracy to a National Standard).If, after a calibration check, the results exceed the tolerance in the specification (or othersuitable performance standard), carry out a calibration adjustment.Calibration AdjustmentIf the instrument is operating correctly, only zero and full-scale calibration will vary. Anyexcessive non-linearity or temperature effects indicate a fault. The instrument should bereturned to a qualified service agent.Guide to Calibration Procedures• Use high quality Repeatable and Linear pressure sources and allow adequatethermal stabilization time before calibration (minimum 1 hour).• Conduct the calibration in a temperature controlled and preferably, humiditycontrolled environment. Recommended temperature is 21°C, ±2°C (70°F, ±4°F).• Use deadweight testers carefully and away from draughts.• Review and become familiar with the whole calibration procedure beforecommencing the calibration process.• The calibration routines cannot be accessed when the instrument is in BASIC mode.Use the TASK key to select another mode (e.g.) ADVANCED before accessing theCALIBRATION mode.Calibration