Ludlum Measurements 334A, Руководство по эксплуатации

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Model 334A Operations Manual
Ludlum Measurements, Inc 20 January 2021
In the third step, adjust the flow restriction device until it is completely open, providing
maximum flow. Again, input the LPM indicated on the flowmeter into the
Measured Flow box
on the screen. Continue with the same process as before.
The last step is to validate the calibration. Adjust the flow restriction device until the
flowmeter reads approximately 80% of max flow, or near 5.5 LPM. Input the Measured Flow ,
and then tap Validate . The validation step will check to make sure the formula calculated
by interpolation is correct, and will produce an error percentage, which should be less than 5
percent, and is usually less than 1 percent.
The flow calibration is now completed and this example shows 0.4% error, which is
acceptable. Tap Close and save the calibration settings. Remove the flow calibration aid
from the detector head, which may be difficult because of the suction created. It is
recommended that the pump is turned off temporarily and possibly a second set of hands
are used for leverage. Lastly, replace the filter and close up the detector head.