Fluke RPM4 manual Premium Class Q-RPTS, Verification of Premium Class Q-RPTs, SPAN1

RPM4™ OPERATION AND MAINTENANCE MANUAL

Table 23. Calibration Point Sequence, Standard Class,

BGxxx Q-RPTs

CALIBRATION	POINT
SEGMENT	NO.
	1
Ascending	2
	3
	4
	5
	6
Descending	7
	8
	9

POINT

[% OF SPAN]1

0%

25%

50%

75%

100%

75%

50%

25%

0%

1.The BG15K span is – 15 to + 15 kPa, 30 kPa total. Therefore, 0 % is – 15 kPa, 25 % is – 7.5 kPa, 100 % is + 15 kPa, etc.

BGxxx (bi-directional gauge) Q-RPTs that will NOT be used in negative gauge measurement mode may be calibrated in gauge (positive pressures) measurement mode only. Use the Standard Class gauge mode (Gxxx) calibration point sequence (see Table 22). BGxxx Q-RPTs calibrated in gauge measurement mode only should not be used in negative gauge mode.

Table 24. Calibration Point Sequence, Standard Class,

BA100K Q-RPT

CALIBRATION	POINT
SEGMENT	NO.
	1
Ascending	2
	3
	4
	5
	6
Descending	7
	8
	9

POINT

[% OF SPAN]1

0%

25%

50%

75%

100%

75%

50%

25%

0%

1.The BA100K span is 70 to 110 kPa absolute.

5.2.4.2PREMIUM 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 5 points up, 2 points down (50%, low point) run is adequate. To verify that the uncertainty turndown with AutoRange (see Sections 3.3.4, 1.2.2.1) is in tolerance, it is recommended that the verification of a Premium Q-RPT include 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).

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