PV211 - GE Measurement & Control
Contents
1. Note On very high resolutions such as 0 1 in H20 only a small movement of the hose is sufficient to see a pressure change FAULT INVESTIGATION MAINTENANCE f the system appears to lose pressure repeat the above procedure Make sure there is no damage to the seals the adapters are tightened sufficiently the pressure release valve 3 is tightened sufficiently to seal Do not try to tighten the connections between the pump and the fine adjust vernier 2 or between the pump and the quick fit connectors 4 These are factory set and changes can cause damage to the sealed joints During leak tests small air movements in or out are possible around the pressure vacuum selector 3 This is normal f the system has not been used for a period of time it can be difficult to operate on the first stroke It will become free after this For seal replacement refer to the service kit IAS A111 1 instructions 2of2 K408 Issue 12. pressure turn the fine adjust vernier clockwise to increase the pressure or counterclockwise to decrease the pressure IMPORTANT To prevent damage DO NOT use force to turn the fine adjust vernier 2 farther than the red line indicator on the thread PRESSURE VACUUM SELECTOR 3 Before you change the mode make sure that the pressure release valve 1 is open To change the mode use an applicable tool to push the selector 3 to the side specified on the label OVERPRESSURE PROTECTION 8 To adjust the maximum output pressure of the system turn the nuts 8 to increase or decrease the stroke length Sve ant Red line indicator Web www gesensing com Operating instructions for the Druck PV211 Pneumatic pressure and vacuum pump GUIDELINES FOR OPERATION A WARNING HIGH PRESSURE Uncontrolled release of high pressure is dangerous and may cause damage to equipment Because the internal pressure can get very high during operation make sure that all the connections are made correctly DO NOT ignore the maximum operating pressure specified on the pump label Before you connect a pressure component to the PV211 make sure that it is isolated from the pressure supply and release the internal pressure slowly DO NOT connect the pump to an external pressure source Calibration Comparison against an analog gauge 1 1 Connect a reference instrument to the pressure port at the top of the pump 9 1 2 Connect
3. Druck PV211 Pneumatic Sensing pressure and vacuum pump K408 Issue 1 KEY 1 Pressure release valve 2 Fine adjust vernier J O 3 Pressure Vacuum selector D 4 Quick fit connectors i 5 3 ft long x 1 8 diameter flexible nylon hose 6 1 4 female NPT adapter 7 Scissor handles 8 Overpressure protection Adjustable stroke control to adjust the maximum pressure output per stroke 3 9 Pressure Port 1 4 NPT female adapter for connection to a reference instrument Example digital analog gauges 10 Seal SPECIFICATION Pressure 0 to 600 psi Vacuum 0 to 28 in Hg Materials Bright nickel plated brass anodized aluminum phosphor bronze springs nitrile nylon Dimensions 8 5 L x 4 W x 2 5 D Weight 1lb DESCRIPTION This system is a portable source of pressure and vacuum Each pump includes a pressure vacuum selector a volume control for fine adjustment and an adjustable stroke to give overpressure protection Note Because it has a small displacement only use the system to pressurize small volumes HOSE ADAPTERS To attach a hose 5 and adapter 6 to a connector 4 turn the knurled nut on the connector counterclockwise PRESSURE RELEASE VALVE 1 Use this to reduce or release the pressure in the system The amount of turn sets the rate to release the pressure Only minimum force is necessary to seal the system FINE ADJUST VERNIER 2 To make accurate adjustments to the
4. the instrument under test to the connection at the end of the flexible hose 5 Note The maximum torque for the adapters is 11 ft lb 1 3 Set the fine adjust vernier 2 to the midpoint of its travel Turn it fully clockwise then four to six turns counterclockwise 1 4 Close the pressure release valve 1 Turn it fully clockwise and tighten to seal 1 5 Operate the scissor handles 7 until the pressure is almost correct To get the maximum pressure output squeeze the handles fully together on each stroke 1 6 To adjust the pressure to the correct value turn the fine adjust vernier 2 clockwise to increase the pressure or counterclockwise to decrease the pressure Caution To prevent damage DO NOT use force to turn the fine adjust vernier 2 farther than the red line indicator on the thread Note Initially small pressure changes can occur thermodynamic effects the seals settle the hoses expand The pressure will stabilize after a short time 1 7 You can also decrease the pressure by careful operation of the pressure release valve 1 1 8 To get a vacuum set the pressure vacuum selector 3 to the vacuum position as indicated on the pump label then use the same procedure as above Note Before you change the mode release the pressure Operation with a high resolution pressure calibrator Because the resolution is better it is possible you will see more of the small pressure changes identified in step 1 6 above
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