Bacharach H25-IR Operation & Maintenance Manual

Also see for H25-IR: Product catalog Specifications Instruction

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Bacharach H25-IR Operation & Maintenance Manual Manual pdf 27 page image

H25-IR CalibrationInstruction 3015-5286 213 CalibrationIt is recommended that a calibration be performed after the initial warm up and then once every 2-4 hours ofuse thereafter. During the calibration cycle internal pressures and flow rates are stored which are used todetermine leak rate and detect proper flow. A flow fault indicates a change in pressure since the time of the lastcalibration cycle. This can be due to particulate build up on the probe tip or internal filters as well as swings inatmospheric pressure due to weather changes (if a long time has elapsed since the last calibration cycle). Mostflow faults can be cleared by simply performing a new calibration.When the instrument is supplied with an internal leak source, the operator can choose between two types ofcalibration: Internal or External. Internal calibration uses the instrument’s built-in leak source, while Externalcalibration uses a customer-supplied calibrated leak source.If the instrument is supplied without a leak source, then the option of selecting the calibration type is removedfrom the menu system. The only option for this model of instrument is to calibrate using an external leak source.3.1 Selecting Internal or External CalibrationUse the Main Menu > CAL DATA > CAL TYPE function to select either Internal or External calibration. IfExternal calibration is selected, then also use the EXT RATE and EXT GAS TYPE functions to enter thecharacteristics of the external leak source.Display the Calibration Data menu by first pressing both the ENT and ESC buttons on either the instrument’sfront panel or Smart probe at the same time to display the Main menu. Next, use the Up and Down buttons tohighlight “CAL DATA”, and then press ENT to display the Calibration Data menu.Main Menu:SYSTEMLOGSETUPSCAL DATADIAGNOSTICS3.1.1 Internal Calibration SelectionFrom the Calibration Data menu, use the Up and Down buttons to highlight “CAL TYPE”, and then press ENTto display its setup screen. Use the Up and Down buttons to highlight “INTERNAL”, and press ENT to make theselection and return to the Calibration Data menu. Press ESC as required to return to the Data Display screen.Calibration Data Menu:CAL TYPEEXT RATEEXT GAS TYPECAL FACTORCAL INTERVALENFORCE CAL INTERVALLAST CAL DATERESTORE FACTORY CALCAL TYPE INTERNALEXTERNAL