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Vacuum:
F.S.
:
Step 6. Ensure that the pressure generated by the Standard on the Static port is still 38.000
inHg. Select item '4' using the keypad on the remote unit and then enter the value 38.000 in
item 4. This indicates the full scale point for the calibration. It is the "As Left" Full Scale Test
Point for Ps1 and Ps2 in Fig. 6.1.
If you make an error while entering data, press "CLR". Do not press "CANCEL". You may
re-enter the value any number of times.
Step 7. Now generate a pressure of 1.000 inHg with the Standard. Allow the pressure to
stabilize for 2 minutes, select item '3' using the keypad on the remote unit and then enter the
value 1.000 in item 3. This indicates the vacuum point for the calibration. It is the "As Left"
Vacuum Test Point for Ps1 and Ps2 in Fig. 6.1.
If you make an error while entering data, press "CLR". Do not press "CANCEL". You may
re-enter the value any number of times.
Step 8. On the keypad of the remote unit, press "PREV SCREEN". The display will return to
the Main Screen.
WARNING: If you press "CANCEL" the calibration adjustment will become void.
Step 9. The calibration adjustment is now complete for the Ps1 and Ps2 outputs. Proceed to
the next step to verify the calibration.
Step 10. Verify the calibration by generating pressures in approximately 10% increments and
noting the actual values for Ps1 and Ps2 at each pressure point. Your calibration sheet will
appear as shown in Figure 6.1.
6.4
Pt CALIBRATION:
Step 1. Connect the output of the Pressure Standard to the Pitot port on the 6600. The
pressure and vacuum sources are to be connected to the control mechanism of the Pressure
Standard.
Step 2. Turn on the 6600 and allow it to warm up for about 30 minutes. The main screen
may be either in the 2-output or 3-output format. Change the Pt unit to "PtinHg" (Ptin).
CALIBRATION
Pt inHg
1. ________
3. ________
2. ________
4. ________
Ps inHg
60
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