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c) Set full scale absolute pressure.
d) Dwell for five minutes.
Repeat the exercising sequence twice then proceed with the calibration
sequence defined in Table 28 (pressure is already at the first point).
All pressure points are absolute pressure.
A dwell time of at least 60 seconds after setting the pressure is recommended
before taking data at each point.
Table 28. Calibration point sequence, A160K Q-RPT
It is not required that the calibration pressure standard apply precisely the nominal
pressure value of each calibration point as long as the exact value of the applied pressure
is known. Best results are obtained if the actual applied pressure is within 2 % of the
recommended nominal point.
5.2.4.2
A350K Q-RPT CALIBRATION SEQUENCE
The calibration sequence starts with exercising of the Q-RPT:
a) Set full scale absolute pressure.
b) Dwell for five minutes.
c) Apply vacuum (very low absolute pressure)
d) Dwell for five minutes.
Repeat the exercising sequence twice then proceed with the calibration
sequence defined in Table 29.
All pressure points are absolute pressure.
A dwell time of at least 60 seconds after setting the pressure is recommended
before taking data at each point.
Table 29. Calibration point sequence, A350K Q-RPT
1.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
CALIBRATION
POINT
SEGMENT
NO.
1
2
Descending
3
4
5
6
7
Ascending
8
9
CALIBRATION
POINT
SEGMENT
NO.
1
2
Descending
3
4
5
6
7
Ascending
8
9
1 kPa (0.15 psi) or the lowest point that can be set reliably by
the reference piston gauge .
Page 119
© 2005-2007 DH Instruments, a Fluke Company
POINT
[kPA (PSI)]
160 (23.2)
120 (17.4)
80 (11.6)
40 (5.8)
6 (0.9)
40 (5.8)
80 (11.6)
120 (17.4)
160 (23.2)
POINT
[kPA (PSI)]
1
Lowest pressure
87.5 (12.7)
175
(25.4)
262.5 (38.1)
350
(50.8)
262.5 (38.1)
175 (25.4)
87.5 (12.7)
1
Lowest pressure
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