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3. OPERATION
Page 21 © 2004-2007 DH Instruments, a Fluke Company
Table 4. 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, negative 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
[SDS] Open and close SDS Q-RPT 3.3.8
[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 Set upper and lower pressure 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
Lo vnt
Set status of TEST(-) vent valve, if present
Q-RPT 3.5.7.4
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 PARALLEL MEASUREMENT MODE
RPM4s equipped with two Q-RPT modules of the same type (Axxx, Gxxx, BGxxx) can be set
to operate in parallel measurement mode.
Parallel measurement mode is intended to improve measurement reliability and reduce measurement
uncertainty by using the measurements of two Q-RPTs together. In parallel measurement
mode, the measured pressure is the average of the readings of the two Q-RPTs.
Parallel measurement mode is considered a third Q-RPT designated <HL> (combination of
Hi and Lo). Once it has been set up, the HL Q-RPT can be selected using the [RANGE] key
and operated with all the features of a Hi or Lo Q-RPT. When setting up parallel measurement,
the Hi and Lo Q-RPTs can be suppressed so that only the HL Q-RPT is active. This feature is
used when the RPM4 will always be used in HL mode.
Parallel measurement mode is set up using [SPECIAL], <7internal>, <3RPT2x>
(see Section 3.5.7.3).
3.2.5 USING RPM4 WITH A PPC3 CONTROLLER/CALIBRATOR
RPM4 can be integrated as a reference pressure measuring device in a PPC3 Pressure
Controller/Calibrator System. See the PPC3 Operation and Maintenance Manual for
information on setting up RPM4 to operate as the PPC3’s external device.
Before an RPM4 is used with a PPC3, the following settings should be made:
SDS Close SDS on all Q-RPT modules on which SDS is available (see Section 3.2.7).
Head If the RPM4 TEST port is at a different level than the PPC3’s TEST port AND the
RPM4 will be used in absolute measurement mode, set the RPM4 head height to
the PPC3’s TEST port level so that RPM4 is corrected to indicate the pressure at
the level of the PPC3 TEST port (see Section 3.3.7).