PPC3™ OPERATION AND MAINTENANCE MANUAL
© 2002-2007 DH Instruments, a Fluke Company Page 126
Table 24. Calibration Point Sequence, Standard Class, BA100K Q-RPT
CALIBRATION
SEGMENT
POINT
NO.
POINT
[% OF SPAN]
1
1 0 %
2 25 %
3 50 %
4 75 %
Ascending
5 100 %
6 75 %
7 50 %
8 25 %
Descending
9 0 %
1. The BA100K span is 70 to 110 kPa absolute.
5.2.4.2 PREMIUM CLASS Q-RPTS
See additional information in Section 5.2.4 concerning exercising the Q-RPT and
dwell time at pressure points.
Verification of Premium Class Q-RPTs
When verifying (as opposed to calibrating) a Premium Q-RPT it is not necessary to
include the higher density of points that is recommended for determination of the
calibration coefficients. A standard ascending/descending 9 or 11 point run is
adequate. To verify that the uncertainty turndown with AutoRange is in tolerance
(see Sections 3.3.4, 1.2.2.1), it is recommended that the verification of a Premium
Q-RPT include a verification of an AutoRanged span of 30 % of the maximum Q-
RPT span. For example, verify an A7M Q-RPT in the default range of 0 to 7 MPa (1
000 psi) and in the AutoRange range of 2.1 MPa (300 psi).
Table 25. Calibration Point Sequence, Premium Class, Axxx and Gxxx Q-RPTs
CALIBRATION
SEGMENT
POINT
NO.
POINT
[% OF SPAN]
1 Lowest Pressure
1
2 5 %
3 10 %
4 15 %
5 20 %
6 30 %
7 40 %
8 50 %
9 60 %
10 80 %
Ascending
11 100 %
12 80 %
13 50 %
14 20 %
Descending
15 Lowest Pressure
1
1 In absolute mode, lowest point that can be set reliably by the
reference piston gauge. Zero (vented) in gauge mode.
Axxx (absolute) Q-RPTs that will NOT be used in absolute or negative gauge
measurement modes may be calibrated in gauge measurement mode with a gauge
pressure standard. Axxx (absolute) Q-RPTs calibrated in gauge measurement mode
by applying gauge reference pressure values should be used in gauge mode only
(see Section 5.2.5).
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