To design a Standard Operating Procedure that describes the procedure for operation, maintenance, and calibration of the Magnehelic Gauge.
2.0 SCOPE
This Standard Operating Procedure (SOP) is applicable for monitoring and recording the positive pressure, negative pressure, and differential pressure in the controlled area.
3.0 RESPONSIBILITY
3.1 All personnel in the laboratory shall be responsible for the implementation and compliance with the SOP.
3.2 Head/Designees/Scientists/Study Directors of the laboratory departments shall be responsible to ensure the implementation and compliance with the SOP.
4.0 DISTRIBUTION
4.1 The Quality Assurance department is responsible for keeping SOP ‘Master Copy’ approved through Quality Assurance Head.
4.2 The copy of ‘Control Copy’ of SOP is being distributed in all departments and placed near related Equipment/ Instrument as ‘Display Copy’.
5.0 DEFINITION(S)
5.1 Definition(s)
5.1.1 Magnehelic is the industry standard to measure fan and blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, liquid levels with bubbler systems, and pressures in fluid amplifier or fluidic systems.
6.0 ABBREVIATION(S)
6.1 Abbreviation(s)
6.1.1 SOP : Standard Operating Procedure
6.1.2 PPEs : Personal Protective Equipment
7.0 PROCEDURE
7.1 Positive pressure measurements
7.1.1 Connect tubing from the source of pressure to either of the two high-pressure ports. Plug the port not used. Vent one or both low-pressure ports to the atmosphere.
7.2 Negative pressure measurements
7.2.1 Connect tubing from the source of vacuum or negative pressure to either of the two low-pressure ports. Plug the port not used. Vent one or both high-pressure ports to the atmosphere.
7.3 Differential pressure measurements
7.3.1 Connect tubing from the greater of two pressure sources to either high-pressure port and the lower to either low-pressure port. Plug both unused ports.
7.4 Maintenance
7.4.1 No lubrication or periodic servicing shall be required.
7.4.2 Keep the case exterior and cover clean.
7.4.3 Occasionally disconnect pressure lines to vent both sides of the gage to the atmosphere and re-zero. Optional vent valves, (bulletin S-101), shall be used in permanent installations.
7.4.4 Calibration check
7.4.4.1 Select a second gauge or manometer of known accuracy and in an appropriate range.
7.4.4.2 Using short lengths of rubber or vinyl tubing connect the high-pressure side of the Magnehelic gage and the test gage to two legs of a tee.
7.4.4.3 Apply pressure through the third leg very slowly. Allow a few seconds for pressure to equalize, fluid to drain, etc., and compare readings.
7.4.4.4 If accuracy is unacceptable, the gauge may be returned to the factory for recalibration.
7.4.5 Calibration
7.4.5.1 With gage case, held firmly, loosen bezel, by turning counterclockwise. To avoid damage, a canvas strap wrench or similar tool shall be used.
7.4.5.2 Lift out plastic cover and “O” ring.
7.4.5.3 Remove scale screws and scale assembly. Be careful not to damage the pointer.
7.4.5.4 The calibration shall be changed by moving the clamp. Loosen the clamp screw(s) and move slightly toward the helix if the gage shall read high and away if reading low. Tighten clamp screw and install scale assembly.
7.4.5.5 Place cover and O-ring in position. Make sure the hex shaft on the inside of the cover shall properly be engaged in zero adjust screw.
7.4.5.6 Secure cover in place by screwing bezel down snug. Note that the area under the cover shall be pressurized in operation and therefore gauge shall leak if not properly tightened.
7.4.5.7 Zero gage and compare to test instrument. Make further adjustments as necessary.
8.0 PRECAUTIONS
8.1 All personal protective equipment like aprons, gloves, masks, head caps, and shoe covers should be worn before using the instrument.
8.2 Clean the equipment with a dry piece of robe or a lightly moistened one, Do not use organic solutions,
8.3 Never use abrasive products or dissolvents.
8.4 Never pour water or liquids on the equipment.
8.5 Once you have finished using the equipment turn it off by using the main switch, clean, and check the equipment so that it is in optimal condition when you use it again.
8.6 If the bezel binds when installing, lubricate threads sparingly with light oil or molybdenum disulfide compound.
9.0 REFERENCES
9.1 Reference
8.1.1 Refer to the manufacturer’s manual for additional information.
6.1 Abbreviation(s)
6.1.1 SOP : Standard Operating Procedure
6.1.2 PPEs : Personal Protective Equipment
7.0 PROCEDURE
7.1 Positive pressure measurements
7.1.1 Connect tubing from the source of pressure to either of the two high-pressure ports. Plug the port not used. Vent one or both low-pressure ports to the atmosphere.
7.2 Negative pressure measurements
7.2.1 Connect tubing from the source of vacuum or negative pressure to either of the two low-pressure ports. Plug the port not used. Vent one or both high-pressure ports to the atmosphere.
7.3 Differential pressure measurements
7.3.1 Connect tubing from the greater of two pressure sources to either high-pressure port and the lower to either low-pressure port. Plug both unused ports.
7.4 Maintenance
7.4.1 No lubrication or periodic servicing shall be required.
7.4.2 Keep the case exterior and cover clean.
7.4.3 Occasionally disconnect pressure lines to vent both sides of the gage to the atmosphere and re-zero. Optional vent valves, (bulletin S-101), shall be used in permanent installations.
7.4.4 Calibration check
7.4.4.1 Select a second gauge or manometer of known accuracy and in an appropriate range.
7.4.4.2 Using short lengths of rubber or vinyl tubing connect the high-pressure side of the Magnehelic gage and the test gage to two legs of a tee.
7.4.4.3 Apply pressure through the third leg very slowly. Allow a few seconds for pressure to equalize, fluid to drain, etc., and compare readings.
7.4.4.4 If accuracy is unacceptable, the gauge may be returned to the factory for recalibration.
7.4.5 Calibration
7.4.5.1 With gage case, held firmly, loosen bezel, by turning counterclockwise. To avoid damage, a canvas strap wrench or similar tool shall be used.
7.4.5.2 Lift out plastic cover and “O” ring.
7.4.5.3 Remove scale screws and scale assembly. Be careful not to damage the pointer.
7.4.5.4 The calibration shall be changed by moving the clamp. Loosen the clamp screw(s) and move slightly toward the helix if the gage shall read high and away if reading low. Tighten clamp screw and install scale assembly.
7.4.5.5 Place cover and O-ring in position. Make sure the hex shaft on the inside of the cover shall properly be engaged in zero adjust screw.
7.4.5.6 Secure cover in place by screwing bezel down snug. Note that the area under the cover shall be pressurized in operation and therefore gauge shall leak if not properly tightened.
7.4.5.7 Zero gage and compare to test instrument. Make further adjustments as necessary.
8.0 PRECAUTIONS
8.1 All personal protective equipment like aprons, gloves, masks, head caps, and shoe covers should be worn before using the instrument.
8.2 Clean the equipment with a dry piece of robe or a lightly moistened one, Do not use organic solutions,
8.3 Never use abrasive products or dissolvents.
8.4 Never pour water or liquids on the equipment.
8.5 Once you have finished using the equipment turn it off by using the main switch, clean, and check the equipment so that it is in optimal condition when you use it again.
8.6 If the bezel binds when installing, lubricate threads sparingly with light oil or molybdenum disulfide compound.
9.0 REFERENCES
9.1 Reference
8.1.1 Refer to the manufacturer’s manual for additional information.
END OF THE DOCUMENT
You may like to read these links:
Hi. I’m Writer of Researchsop.com. ’ ’ Please share these SOPs to all concern pharma people for their development. I like to fullfill the need of curious people. These things inspire me to make things looks better.
0 comments:
Post a Comment