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Resumen del manual
Materials for Cleaning the High Range Piston Cylinder 1. Prepare a clean work area near a running tap water source. 2. Prepare several sets of folded wipers as shown in Figures 6-2 through 6-4. Two wipers can be folded together for wiping the outside of the piston and cylinder. Prepare several twisted wipers as shown in Figures 6-10 through 6-12 to wipe the bore of the cylinder. 3. Disassemble the piston/cylinder assembly. 4. Insert the retaining clip from the bottom of the piston into the installation tool, rinse with solvent and set aside. Piston / Cylinder Cleaning Instructions Cleaning the High Range Piston/Cylinder Assembly 5. Pre-clean the piston and cylinder using solvent soaked wipers. 6. Prepare additional wipers as necessary for drying the piston and cylinder once they have been washed with soap and water. 7. Scrub the bore of the cylinder using a soft bottle brush, Cashmere Bouquet soap and warm tap water. 8. Rinse thoroughly and dry immediately using the pre-twisted wipers. 9. Set the cylinder aside and cover with a clean dry wiper. 10. Using soft paper wiper, Cashmere Bouquet soap and warm tap water, scrub the outside of the piston. 11. Rinse thoroughly and dry immediately. 12. Set the piston aside and cover with a clean dry wiper. Allow the piston and cylinder to set for about 15 minutes before reassembly. 13. Clean the thrust bearing, cylinder container and upper retaining ring using solvent soaked wipers and set aside. 14. Inspect the o-rings for any sign of damage, replace as necessary. 15. Apply a slight amount of lubricant to the o-rings and wipe off any excess. 16. Place the cylinder upright (narrow neck downward) on the work area. 17. Carefully inset the piston into the top of the cylinder and allow it to sink freely into the cylinder. Do not force the piston into the cylinder or it may be damaged. 18. If lint becomes a problem a clean dry gas source can be used to blow the lint off of the parts prior to assembly. 19. Install the thrust bearing around the bottom o the piston with the flange of the outer race facing the bottom of the cylinder. 20. Install the retaining clip onto the bottom of the piston using the installation tool. The end of the piston must be supported during the retaining clip installation so as not to risk breading the piston. 21. Install the assembly into the instrument base and test according to Chapter 6, Functional Testing of Piston/Cylinder Assemblies. 22. Prior to using the pin vise, be sure it is clean and in good working order. Disassemble the pin vise and clean the components with solvent soaked wipes. RUSKA 2470 Users Manual gmq33.bmp Figure 6-10. Preparing the Kim Wipe for Cleaning the High Range Cylinder - Step 1 gmq34.bmp Figure 6-11. Preparing the Kim Wipe for Cleaning the High Range Cylinder - Step 2 Piston / Cylinder Cleaning Instructions Cleaning the High Range Piston/Cylinder Assembly gmq35.bmp Figure 6-12. Preparing the Kim Wipe for Cleaning the High Range Cylinder - Step 3 gmq36.bmp Figure 6-13. Cleaning the High Range Cylinder RUSKA 2470 Users Manual gmq37.bmp Figure 6-14. Drying the High Range Cylinder Appendix A Explanation of "Pressure Calculation Worksheet" Introduction See Tables at the end of this appendix. These tables may be used with gas and hydraulic piston pressure gauges that are operated with an atmospheric reference or vacuum reference. PA represents the pressure at the piston reference gauge level, PB represents the pressure desired at the device under test, and PH is the head pressure created by the pressure medium and the difference in height between the piston pressure gauge and the device under test. A. A minimum of six significant figures must be used in all calculations involving reported constants, masses, etc. The manufacturer's claims for accuracy assume the local gravity to be known to at least six significant figures B. When the piston pressure gauge is used as a standard of pressure, it is convenient to perform the pressure-to-mass calculations in advance of operating the standard. Since the piston gauge temperature fluctuates while it is operated, a confusing point in the procedure is the necessity for the temperature of the gauge to be predicted prior to operation. This “expected temperature” however is used to allow the pressure calculations to be performed. Once the piston pressure gauge is floating at the intended pressure, a final temperature observation is made and then “trim” masses are loaded onto the piston gauge to correct for any temperature variations that exist between the expected and the actual temperatures. The final column in the worksheet is used to calculate the temperature coefficient, which defines the amount of trim that is required to correct for this temperature change. It is usually prudent to select an expected temperature ( t ), which is lower than any temperature that will be experienced. This is so that the operator can always add mass to correct for the actual temperature. Adding mass is g...