Operating Instructions - Snap-on Equipment

Pocket PCMaintenance2GThis section discusses several maintenance tasks.• Gas Calibration, page 2G-1• Leak Check, page 2G-7• Zero Calibration, page 2G-9• Station Information, page 2G-10• Setup, page 2G-11— General Setup, page 2G-11— Standards, page 2G-17— New NOx Sensor, page 2G-18— Diagnostics, page 2G-20• Pocket PC Maintenance, page 2G-26— Water Trap / Filter Maintenance Warnings, page 2G-26— Pocket PC Error and Status Messages, page 2G-28Gas CalibrationDuring normal operation, a gas analyzer should be calibrated periodically toensure accurate gas measurement. The gas bench is calibrated using a specialcomposition of gases that have been certified for concentration. Calibrationintervals may vary depending on the application and use, but quarterly as part ofroutine maintenance is recommended, more frequently with heavy use.The two gases recommended for calibration are Bar97 Mid 2 Gas and Bar97 HighGas, composition as follows:Bar97 Mid 2 Gas Bar97 High GasPropane 1920 ppm 3200 ppmCO 4.80% 8.00%CO 2 7.20% 11.00%NO 1800 ppm 3000 ppmTo begin Gas Calibration,1. Press the Maintenance button on the main menu.— The Maintenance menu displays.2. Choose Calibration from the Maintenance menu.— The initial Gas Calibration window opens.2G-1