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Now connect the rubber coupling to the center stem of the burette and connect the other end of the coupling to the hose nipple of the Whitey valve
Shake the instrument a few times to allow absorption of CO2 gas by the caustic solution. This solution may cause severe burns to the operator if not handled with care.
Therefore, it is good practice to bring samples to this temperature prior to testing. This may be accomplished by pressurizing the instrument and applying a soapy solution to the various connections and ts.
While filling the burette, check the plastic connection tubing and work out any air bubbles that may be present 9. Close the Whitey valve and remove the beaker from the piercing needle A 6.
This will cause the water top be drawn upward through the Whitey valve, displacing any trapped air in the system. The volumes of CO2 gas may be determined by taking the maximum pressure reading during the test and then, immediately after the test, inserting a laboratory thermometer into the sample and recording the cnat.
Open the burette cock and allow the water to return to the level bottle. The instrument is now ready for operation but should first be tested for any gas leaks that may occur at various connections. When making the air reading in the burette, the level bottle should be raised so as to Online dating ohio chat lines the liquid in the burette and level phonv to the same level.
The of tests that can be expected from the caustic solution may vary according to the strength of the solution being used. Now connect the rubber coupling to the center stem of the burette and connect the other end of the coupling to the hose nipple of the Whitey valve It is also advisable to invert the instrument and allow the gas that was released into the burette to be absorbed in the larger bottom bulb of the burette.
Contact VuiLen would like to thank all Players who have been with us through all the years. Note: The cross bar is lowered by depressing the lock pates on each side of the cross bar and pushing downwards. Air Readings: If air readings tend to increase after a period of testing, the caustic solution may be diluting and should be replaced with a fresh solution.
Depress the lock plates and push the cross bar rapidly downwards until the container is pierced. Wear goggles and protective clothing while operating this instrument.
Replace the water in the level bottle with caustic solution, filling it approximately half full. Open the Whitey valve and allow gas to flow into the burette, reducing the gauge pressure to 5 psi or less.
Tap the tubing to release air into the burette 5. Open the Whitey valve and repeat the above process again.
Raise the level bottle to fill the burette completely and close the burette cock. To prevent overflow, the caustic trap is furnished for attachment at the top of the burette.
Discard the water. For very accurate work, however, the operation should be continued until a constant air reading is obtained. Shake the instrument with a rapid back and forth motion until maximum gauge pressure has been obtained.
Open the Whitey valve full. Operation: Warning: Caustic Solution is used in the operation of pyong instrument. Chung toi cung xin thong bao ve viec nang cap phien ban moi do trinh duyet web khong con ho tro Flash Player vao cuoi nam The shaking of the instrument allows for more build up of gas in the test container and for the next release of gas into the burette.
Place the bottle or can to be tested on the base pad and lower the cross bar to the point where the rubber seal just touches the top of the container.
Ngay phat hanh : 12 - 30 - Usually eight or ten shakes are enough to remove most of the air in the sample. Cam on su ho tro cua ban, VuiLen. Hold the instrument at the bottom of the base with the right hand while the left hand holds both the guide rod and support rod Note: Wear protective clothing and goggles when using caustic solution. Connect the connection tubing to the side stem of the level bottle The instrument may also be submerged in a glass tank of water, and leaks observed in this manner.
Note: The burette is very fragile and may break if it comes in contact with an object while shaking the instrument.
Place a small beaker of water under the rubber seal and lower the cross bar so as to submerge the rubber seal in the water. When the lock plates are released, the cross bar will remain firmly locked in position. Close the Whitey valveopen the burette cock and put approximately cc's of water in the level bottleelevating the same above the burette so as to allow the water to run down into the burette to the bottom of the calibrations.
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