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RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 20
The ranges available on the RPM4 are accessed using [RANGE] (see Section 3.3.1) and/or
created using [AutoRange] (see Section 3.3.4).
Most settings made in an RPM4 range, such as unit of measure, measurement mode, display
resolution, and stability setting are specific to the range. Settings selected while one range is
active apply to that range and not to other ranges. The range specific settings are stored with
the range and recalled whenever the range is made active. This makes setting up ranges a
convenient way to store and recall frequently used operating configurations. See Table 2 for a listing
of RPM4 adjustments and settings and whether they are range, Q-RPT or system specific.
Table 2. Settings and what they are specific to
(range, measurement mode, Q-RPT, system)
SETTING PURPOSE SPECIFIC TO SECTION
[UNIT] Set pressure unit of measure Range 3.3.2
[MODE] Set pressure measurement mode
(absolute, gauge)
Range 3.3.3
[DISPLAY] Set bottom line display function System 3.3.6
[HEAD] Set fluid head correction height, fluid, unit
of measure
System 3.3.7
[AutoZ] Run AutoZ Q-RPT and measurement mode 3.3.9
Resolution Set pressure display resolution Range 3.4.2
Stability Set Ready/Not Ready stability test. Range 3.4.3
Upper Limit (UL) Set upper limit alarm Range and measurement mode 3.4.4
AutoZ AutoZ, ON/OFF, set and view values Q-RPT and measurement mode 3.5.1
Screen Saver,
Sound, Time,
ID, Level
Set system user preferences System 3.5.5
Cal Various Q-RPT and barometer calibration
functions, including turning off absolute and
negative gauge modes
Q-RPT or barometer 3.5.8
3.2.4 AUTOMATED TEST AND CALIBRATION SEQUENCES
The RPM4 AutoTest function supports “Quick” and “File” automated calibration sequences.
These automatically AutoRange the RPM4, setting its resolution, stability limit and upper limit
based on the characteristics of the device under test. They also prompt the user through the
increments of the calibration sequence and log calibration data. The AutoTest function
should be used for most common calibration tasks, especially calibration of analog pressure
gauges (see Section 3.3.10).
3.2.5 HPMS (HIGH PRESSURE MOUNTING SYSTEM)
The HPMS (high pressure mounting system) holds the RPM4 at a convenient viewing angle
and includes a valve and visual indicators to isolate and protect the RPM4’s 2 000 psi (A20M)
Q-RPT when using the 10 000 psi (A70M) Q-RPT.
See Figure 10 for an HPMS schematic.
OPERATION
Numerical references in this Section refer to Figure 9.
In normal use, the operator’s only interaction with the HPMS is to operate the isolation valve
knob to connect and disconnect the Lo Q-RPT from the TEST port. The valve’s operation is
prompted by the Valve Position LEDs (2, 4).