However, a 3% accurate rotameter, suitable for reading 10 Lpm, usually reads 2 to 20
Lpm. That means 9.66 Lpm could actually vary from 9.06 to 10.26 Lpm! Therefore, if a
rotameter must be used with the PQ100, the corrections are pointless and a straight 10
Lpm read from the rotameter should be utilized. The accuracy of the PQ100 is now
degraded to 5%.
7.4 Calibration Notes
1. After a Calibration has been entered, it should be "Run" 15 minutes or so for
verification. If the measured flow appears to be offset, determine the amount of
offset and jot this number down. Next, Re-enter the Calibration mode and this
time, set the calibration high or low depending on the observed offset.
2. If the "Run/Stop" key is pressed to stop the pump for any reason during
calibration, the Target location becomes Un-Calibrated. If the "Setup" key is then
pressed to exit, the location remains Un-Calibrated.
THE ONLY WAY TO "ACCEPT" THE VALUE IS TO PRESS THE "ENTER"
KEY WHILE THE PUMP IS RUNNING.
3. EACH TARGET FLOW RATE THAT IS TO BE USED SHOULD BE
CALIBRATED WITH A FILTER WHOSE PRESSURE DROP IS SIMILAR TO
THE TYPE ACTUALLY INTENDED FOR USE.
Failure to follow this procedure will result in an extended time period for the Flow
Control System to Equilibrate (1-3 min.)
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