Operating Instructions - CPA2501
67
Air Data Test Indicator
CPA2501
10.6 Calibration Data
The Calibration Data Application is where the calibration data for each transducer is stored and
amended. The Serial number (S/N), Zero offset (Zero) and Span offset (Span) can be seen in this screen.
The date of calibration, the calibration interval and the certificate number can be entered by pressing
the corresponding button, then saved by pressing the Check [
] button. To revert back to the factory
calibration, press the “Restore Factory Cal” button. To view the calibration data for each transducer press
the “Channel” button at the top and choose a transducer from the resulting channel selection menu.
Figure 10.6 - Calibration Data
10.7 One Point Cal Application
A single point calibration (usually a zero point calibration) of each transducer installed can be
accomplished in “One Point Cal” Application. The transducer channel is chosen by pressing the
“Channel” button at the top of this screen, and then selecting from the list of installed transducer
channels. For gauge pressure simply expose the reference and the pressure port of the transducer to
atmospheric pressure and then press the “New Value” button and enter zero (0) using the keypad. For
an absolute transducer apply a known reference pressure to the pressure port of the transducer above
600 mTorr and below 20% of the transducer’s range. Press the “New Value” button and then enter
the reference pressure (known true pressure) using the keypad. If you want to save the value in the
transducer, press Save.
Notice the reference symbol [ ],
this is a reference indication giving
a constant reference point for the
level of the internal transducer.
Figure 10.7 - One Point Cal Application
