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哪位英语好的兄弟姐妹帮我翻译下,万分感谢!!! Re-calibration Control units are factory calibrated for the supplied probe and should not normally require field recalibration, unless probe length or refrigerant are changed. if recalibration is ever desired, only two points need to be checked ,typically the   0% level and the sight glass % level point(normally at the 50% level point, but also possible at other levels). To check the proper calibration at the 0 % level point, the level column should be completely free of liquid. this can be accomplished by emptying the vessel or by closing the valve in the upper equalizer line while the hand valve in the lower equalizer line is open. it may take several minutes for the column evaporation to push the liquid surface down below the probe. with the level column free of liquid the control unit’s digital display should be at +00%. If not, remove seal on the low level calibration screw and adjust with a small screwdriver until display indicates +00% ;replace seal. To check the sight glass % level point, some basic calculations need to be made .see calibration diagram in the next column. add 9 inches to probe’s stated factory set Active Length(A) measure this distance from the reference line (yellow line around probe body)down. this will be the 0% level point on the outside of the level column. Measure up from this 0% level point to the center of the sight glass and divide by the desired active length (usually the factory stated active length)..this is the level in percentage points at which the sight glass is located (Hansen Level Column standard sight glass location is 50%).raise of lower the liquid inside the level column so that it is centered in the sight glass. the digital display should be the same as the calculated sight glass % level .if not, remove the seal on the high level calibration screw and adjust until digital display equals the calculated sight glass % level; replace seal.
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