PRESSURE/VACUUM INSTRUMENTATION Pressure and Pressure/Vacuum Gauges (Section 6-7.1) Check operation of gauge. Monthly OM OM OM Ensure gauge is indicating pressure of the system. SM SM SM outside of gauge glass. Quarterly Inspect liquid filled gauges for Semi-annually SM SM SM leakage, refill/replace as needed. Pressure and Pressure/ Conduct calibration check by Annually SM SM SM Vacuum comparing readings of the process Gauges gauge with the readings of a certified master calibration gauge which has been calibrated within the last year. The process gauge and the master calibration gauge must be connected to the same pressure source for testing. Verify accuracy of gauge is within ±2% of full scale. Calibrate gauge if required. Differential Pressure Gauges (Section 6-7.2) Verify proper operation of Monthly SM SM SM differential gauge in accordance with gauge manufacturer’s procedures. Clean outside of gauge glass. Quarterly OM OM OM Conduct calibration by Annually SM SM SM Differential comparing readings of the Pressure Gauges differential process gauge with the readings of a certified differential master calibration gauge which has been calibrated within the last year. The differential process gauge and the differential master calibration gauge must be connected to the same pressure source for testing. Verify accuracy
PRESSURE/VACUUM INSTRUMENTATION Pressure and Pressure/Vacuum Gauges (Section 6-7.1) Pressure and Pressure/ Vacuum Gauges Check operation of gauge. Ensure gauge is indicating pressure of the system. Monthly OM OM OM outside of gauge glass. Quarterly SM SM SM Inspect liquid filled gauges for leakage, refill/replace as needed. Semi-annually SM SM SM Conduct calibration check by comparing readings of the process gauge with the readings of a certified master calibration gauge which has been calibrated within the last year. The process gauge and the master calibration gauge must be connected to the same pressure source for testing. Verify accuracy of gauge is within ±2% of full scale. Calibrate gauge if required. Annually SM SM SM Differential Pressure Gauges (Section 6-7.2) Differential Pressure Gauges Verify proper operation of differential gauge in accordance with gauge manufacturer’s procedures. Monthly SM SM SM Clean outside of gauge glass. Quarterly OM OM OM Conduct calibration by comparing readings of the differential process gauge with the readings of a certified differential master calibration gauge which has been calibrated within the last year. The differential process gauge and the differential master calibration gauge must be connected to the same pressure source for testing. Verify accuracy Annually SM SM SM
ufc_3_460_03_appendix_c.docx