18
Chapter 8: Using Sensor Factors for MFC and MFM
Calibration
MFCs (mass flow controllers) and MFMs (mass flow meters) are originally calibrated by the manufacturer with a
specific gas. When you use an MFC or MFM with a different gas than the one used in the last calibration, you
must apply a flow correction factor to account for different gas properties that affect flow. The MFC or MFM
manufacturer can provide the appropriate sensor factor value. The user can also apply this flow correction factor
to the CalTrak SL 800 readings.
To enable your CalTrak SL 800 to scale its actual flow measurements to match the adjusted flow from the MFC
or MFM, input the sensor factor into the CalTrak SL 800 before calibrating the MFC or MFM.
The Sensor Factor is displayed on the run screen of the CalTrak SL 800 as SF X.XXX. The default setting is
1.000. If you input a sensor factor other than 1, red text will display on the Measure screen showing the sensor
factor applied.