Ludlum Measurements 334A, Руководство по эксплуатации

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Model 334A Operations Manual
Ludlum Measurements, Inc 19 January 2021
Performing the Calibration
To begin, make sure the pump is ON ( Monitor–Pump–On… in the menu). Then, open up the
flow calibration dialogue under Calibrate–Flow… The flow calibration is a three-point
calibration, meaning it takes measurements at three different flow rates (low, medium, and
wide open), and the program then uses those measurements to create an equation for a
curve. It can then use the curve to calculate the pump’s flow later on. A fourth flow rate is
used to validate this curve, and reports the measured difference in an error percentage. The
flow calibration dialog instructs the user throughout the process.
NOTE: Any flow rate will work as long as the measured flow entered is the same as
what is
reported by the flowmeter. So if the Flowmeter reports 4.11 then the
Measured Flow is entered at 4.11 even if the instructions ask for 4.0 LPM.
The first step in the flow calibration is to reduce the flow rate by adjusting the flow
restriction device to a low flow rate, at about 4 LPM. Enter the actual value from the
flowmeter in the dialogue under
Measured Flow . Then hit Start Calibration . Each step in the
process will take about 30 seconds as indicated by the progress bar. Repeat this process for
the medium flow rate, at about 5 LPM.