Pressure Cal - Teledyne T640 User Manual

4.1.1.

PRESSURE CAL

08354A DCN7303
IMPORTANT: Perform this check/calibration prior to any flow calibration.
The pressure measurement of the T640 is for the ambient pressure that the
instrument is operated in. No direct pneumatic connection to the instrument
needs to be made to perform this check/calibration.
1. With the Pressure Standard operating and measuring the ambient pressure
in the same room as the T640, navigate to the Pressure Cal menu.
2. Compare the "Measured Pressure" in this screen to the Pressure Standard.
3. If the two values differ by more than 5%, then press the value button in the
"Actual Pressure" field, enter the value measured by the Pressure Standard,
and press the "Calibrate" button on this screen.
The Measured Pressure value should change to closely match the Actual Pressure
within a few seconds.
Teledyne API Model T640 PM Mass Monitor 49