Bacharach MGS 400 User Manual

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Bacharach MGS 400 User Manual Manual pdf 37 page image

1100-2294 Rev 1 365.2.2 General Calibration ProcedureWARNING: The MGS-400 Gas Detector MAY NOT be in an alarm or faultcondition during calibration. Acknowledge any alarms or faults BEFOREattempting to begin the calibration process.WARNING: Except for CO2 or O2 sensors, calibration gas must be in a balanceof air, not nitrogen (N2).IMPORTANT: Calibration and / or bump testing requires the MGS-400calibration adapter kit (P/N: 6302-9990).IMPORTANT: At elevations higher than 6,560’ (2,000 m), calibration will result ina lower reading. Above 6,560’, the instrument should be calibrated in theenvironment of operation.1. Fit calibration adapter to the gas detector lid.2. If using a variable flow regulator, adjust the gas flow to approximately 0.3 L/min.5.2.3 Zero AdjustmentAmbient air can be used to zero the sensor instead of synthetic air only if the area is known tobe free of the target gas or any gas to which the sensor may be cross-sensitive. In this case, nocylinder or calibration adapter is needed for the zero adjustment.WARNING: The MGS-450 MAY NOT be in an alarm or fault condition duringcalibration. Acknowledge any alarms or faults BEFORE attempting to begin thecalibration process.WARNING: Except for CO2 or O2 sensors, ambient air may be used instead ofzero gas if the area is know to be free of the target gas or any gases to whichthe sensor may be cross-sensitive.IMPORTANT: Calibration and / or bump testing requires the MGS-400calibration adapter kit (P/N: 6302-9990).1. Begin zero adjustment:a. MGS-400 App: Home Tab  Calibrate  scan barcode on gas cylinder or manuallyenter values for zero gas.b. Manual: hold MAG#1 for >5-seconds. The LED will blink green-green-red whenthe instrument is ready.2. Apply zero gas (or ambient air per warning above).3. Confirm the start of calibration:a. MGS-400 App: press the Start Zero button.