5
Druck ADTS 2XX Calibration Manual
K0425 Issue No. 2
2.2 Calibration Check of the Pitot Channel
•
Before starting this procedure carry out a leak test.
•
Set the unit to Leak/Measure mode, set operating limits to MAX and disable Auto Leak,
refer to the User manual for further details.
•
Connect the pressure standard to pitot channel Pt.
(1)
Connect calibration standard to the pitot output.
(2)
Set the calibration pressure to the first pressure value in Table 2-2.
(3)
Compare the pressure value on the calibration standard to the value displayed and
record the difference.
(4)
Repeat (2) and (3) for pressure No. 2 to 7 in Table 2-2.
(5)
If the recorded difference exceeds the allowable tolerance (*) repeat steps (2) to (4). If,
on the second calibration check, the recorded difference exceeds the allowable
tolerance (*) carry out a calibration adjustment.
(6)
The display goes back to the channel select menu, select another channel for calibration
checking or exit the calibration menu.
(7)
Set the calibration standard to atmospheric pressure. Disconnect calibration standard
from the pitot output.
(8)
If there is no further calibration or testing required, switch off the unit.
T
ABLE
2-2 P
ITOT
C
HANNEL
C
ALIBRATION
P
RESSURES
*
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.
Pressure
No.
Pressure
mbar
Tolerance*
mbar
1
35
±0.35
2
500
±0.35
3
1000
±0.35
4
1500
±0.35
5
2000
±0.35
6
2500
±0.35
7
3000
±0.35
