Fluke RPM4 Main run screen measured pressure display, Default Display function, SDS function

RPM4™ OPERATION AND MAINTENANCE MANUAL

The following operating conditions are specific to differential mode:

Main run screen measured pressure display

The display of measured pressure in the main run screen is the difference between the Hi and the Lo Q-RPTs (Hi – Lo) with a differential mode AutoZ correction (see Section 3.3.9.3). The pressure measurement mode indicator is <d>. The Q-RPT position indicator is <Hd>.

Default DISPLAY function	The default display function is RPT with the Lo Q-RPT
	displayed on the bottom display line (see Section
	3.3.6.4). This allows the line pressure (Lo Q-RPT
	indication) to be viewed simultaneously with the
	differential pressure. All other DISPLAY functions
	(average, rate, deviation, HiLo, freeze) apply to
	the differential pressure
SDS function	[SDS] key operation to OPEN SDS opens SDS of
	both the Hi and Lo Q-RPTs simultaneously. (see
	Section 3.3.8). Overpressure is driven by the pressure
	range of the Lo Q-RPT (see Section 3.4.4.1).
AutoZ function	AutoZ manages zeroing of differential mode and is
	intended to “tare” the two Q-RPTs at a common
	line pressure (see Section 3.3.9.3). Switch to a
	mode other than differential for AutoZ functions of
	an individual Q-RPT.
Leak Check function	The leak check function uses the differential mode
	measurement (see Section 3.3.5).
Head function	The head function applies to the differential
	pressure (see Section 3.3.7).
AutoRange function	Differential measurement mode is not available in
	AutoRange (see Section 3.3.4).
UL function	The UL limits apply to positive and negative
	differential pressure (see Section 3.4.4) and the
	default is the maximum value of the differential
	pressure. Both the Lo and Hi RPT base
	measurement mode ULs also remain active. The
	Hi RPT UL provides a upper limit for the maximum
	pressure on the Hi side of the differential pressure.
	Both the differential and base mode Hi RPT UL
	cause the display of differential pressure to flash
	when exceeded. The Lo RPT UL provides an
	upper limit for the line pressure.
AutoTest function	The AutoTest function (see Section 3.3.10) is not
	available in differential measurement mode.

3.3.4 [AU T O RAN GE]

PURPOSE

To automatically set up RPM4 to optimize its measurement characteristics and features for specific, user specified range of operation.

PRINCIPLE

RPM4 is designed to support the calibration and test of a very wide variety of test ranges in various measurement modes.

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