of gauge is within ±2% of full scale. Calibrate if required. Some differential pressure gauges Annually for SM SM SM inspections and have a small gauge protection maximum 5 filter located at the high pressure years of service inlet of the gauge that must be between filter checked and replaced as needed. replacements. Filters need to be replaced if the indicator is moving slow or sluggishly inside the sight glass or if the sight glass is dirty. Refer to manufacturer’s operation and maintenance manual for filter replacement procedure. Pressure Transmitters (Section 6-7.3) Inspect the exterior of the SM SM SM transmitter enclosure for accumulated oil, dust, and dirt. Clean if required. Check that both enclosure caps are fully threaded onto the enclosure, compressing the O-ring between the cap and the enclosure. The O-ring must not be cracked, broken, or otherwise damaged. Pressure Quarterly Transmitters Inspect the display viewing glass for cleanliness and damage. Replace the enclosure cap assembly if the glass is damaged or missing. No accumulation of dust, dirt, or water (condensate) should be present inside the enclosure. Inspect transmitter and mounting bracket hardware for tightness. Tighten loose hardware as necessary.
of gauge is within ±2% of full scale. Calibrate if required. Some differential pressure gauges have a small gauge protection filter located at the high pressure inlet of the gauge that must be checked and replaced as needed. Filters need to be replaced if the indicator is moving slow or sluggishly inside the sight glass or if the sight glass is dirty. Refer to manufacturer’s operation and maintenance manual for filter replacement procedure. Annually for inspections and maximum 5 years of service between filter replacements. SM SM SM Pressure Transmitters (Section 6-7.3) Pressure Transmitters Inspect the exterior of the transmitter enclosure for accumulated oil, dust, and dirt. Clean if required. Check that both enclosure caps are fully threaded onto the enclosure, compressing the O-ring between the cap and the enclosure. The O-ring must not be cracked, broken, or otherwise damaged. Inspect the display viewing glass for cleanliness and damage. Replace the enclosure cap assembly if the glass is damaged or missing. No accumulation of dust, dirt, or water (condensate) should be present inside the enclosure. Inspect transmitter and mounting bracket hardware for tightness. Tighten loose hardware as necessary. Quarterly SM SM SM
ufc_3_460_03_appendix_c.docx