Bacharach Portable Combustion Analyzer 24-9351 Operating & Maintenance Instructions

Also see for PCA 20: Product catalog Instruction

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Bacharach Portable Combustion Analyzer 24-9351 Operating & Maintenance Instructions Manual pdf 56 page image

PCAInstruction 24-93515.8 Calibrate NX(For PCA Models 30, 35, 60 & 65)The Nitric Oxide sensor needs to be spanned at regular intervals todetermine that it still meets its accuracy specification. Because of thetoxicity of Nitric Oxide gas, however, unless your facility has the neces-sary gas cylinders and personnel trained in the handling of toxic gases,we recommend that the Nitric Oxide sensor be spanned by an authorizedBacharach Service Center.Material Required:• Calibration Gas Fixture (Section 5.2)• Gas Cylinder, 50 to 150 ppm Nitric Oxide with an analytical accuracy of±1% (customer supplied)Procedure:1. Enter the Calibrate Menu Screen per Section 5.3. Then choose tocalibrate the NX sensor.2. At the conclusion of Step 1 the pump should start running.3. Using the Gas Fixture shown in Figure 5-1, attach the Nitric Oxidecalibration-gas cylinder to the analyzer’s GAS inlet.4. Adjust the regulator of the calibration fixture for a flowmeter indica-tion of approximately 2 SCFH.5. Wait until the MEASURED reading on the screen stabilizes (approxi-mately 3 minutes). Then use the st and keys to enter anAPPLIED value* that equals the concentration that is stamped on theNX calibration-gas cylinder.Typical Calibrate NX Screen During Calibration,Using 100 ppm Nitric Oxide Calibration Gas:CALIBRATE NXMEASURED 092 PPMAPPLIED 0100 PPM6. Press the key to calibrate the analyzer’s MEASURED value tothat of the APPLIED value. At this time the Calibrate Menu Screen isredisplayed.* The calibration range for this screen is 50 – 150 ppm. Any attempt tocalibrate outside range will cause the analyzer to display an errormessage.Calibration5-8