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If the unit has a flow reading of 200ml/min then the corrected flow reading (for CO2) would be:
Corrected Flow = 200 X 0.88 = 176 ml/min
CAUTION:. The use of correction factors can be subject to inaccuracy and errors of up to ±10%. Please contact the Omega Engineering Service Department if accurate, certified recalibration is required.
Calculating a correction factor for a gas enables the calibration of the unit to be adjusted for that gas. This is accomplished by:
i)Calculate the corrected flow reading or VDC output at 100% of flow using the above formulas.
ii)Adjust the flow of (the new) gas to give this flow reading
iii)Maintain this flow and ensure a stable reading.
iv)Adjust the gain potentiometer on the unit so that a 5VDC output is obtained. The unit is now calibrated for the new gas.
For example: A 2.0
It should be noted that the maximum output voltage for the units is approximately 5.9VDC. It is not possible to adjust units if an output of greater than 5.9 VDC is required.
Adjusting the Gain Potentiometer Using a Flat Head Screwdriver
(FLR 1000 shown, other models similar)
pg. 15 of 29