User`s guide

Routine Maintenance
261
3. Attach a bubble flow meter to the vent.
4. Press the Set button on the screen to measure the flow at
that point.
5. In the Actual box you will see the actual flow reading.
At this point you will be able to tell how accurate your
setpoint value is from your actual value. See following
Note.
6. Press OK when completed.
NOTE: Most mass flow controllers are calibrated in sccm
(standard cubic centimeters per minute). This is the same as
mL/min at 0 °C and 760mg Hg.
To convert between the displayed flow rates and the flow
rates that would be observed by connecting a bubble flow
meter to the vent (i.e. the volumetric flow rate) the
following equation should be used: