Druck ADTS 403F, Calibration Manual

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Copyright 1996 Baker Hughes Company.
12 | ADTS 403/405 Calibration Manual–English
Chapter 4. Calibration
6. Repeat (2) and (3) for pressure No. 9 to 11 in Table 4 - 3; points 12 and 13 are used on the
1000 knot Pitot range sensors.
Note: A label on the front panel of the ADTS 403/405 shows the full-scale range of the Pitot
sensor.
7. If the recorded difference exceeds the allowable tolerance (
a
) carry out a calibration
adjustment detailed in Section 4.9.
8. Press [END] F4.
9. The display goes back to the channel select menu, select a channel for calibration checking
or exit the calibration menu.
10. Adjust calibration standard to atmospheric pressure. Disconnect calibration standard from
the unit.
11. If there is no further calibration or testing required, switch off the unit.
4.6 Main Calibration
4.6.1 To Operate Calibration Switch
1. Remove the old label.
2. Rotate the screw beneath the label fully counter-clockwise. When calibration is complete,
rotate the screw fully clockwise and fit a new calibration label.
4.6.2 Pressure Source
Select the pressure and vacuum source to be used during the calibration.
•
Internal:
Table 4 - 3: Combined Pitot and Static Calibration Pressure
Pressure No. Pressure (mbar)
Static (Ps)
Tolerance
a
(± mbar)
Pitot (Pt)
Tolerance
a
(± mbar)
a. The tolerance quoted in this table may need to be adjusted to allow for measurement uncertainties of the calibration
standard in use. The limits stated relate to the published, minimum specification for the equipment entering service.
Acceptance limits may vary at the user's discretion for specific applications.
1 27.62 0.1 0.24
2 72.00 0.1 0.24
3 189.00 0.1 0.25
4 466.00 0.1 0.25
5 697.00 0.1 0.26
6 843.00 0.1 0.27
7 1013.00 0.1 0.27
8 1100.00 [END PS] 0.1 0.28
9 (Pitot only) 1655.00 0.1 0.32
10 (Pitot only) 2200.00 0.1 0.36
11 (Pitot only) 2590.00 0.1 0.40
12 (Pitot only) 3000.00 0.1 0.44
b
b. 1000 knot Pitot (Pt) range.
13 (Pitot only) 3500.00 0.1 0.49
b