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RPM4™ OPERATION AND MAINTENANCE MANUAL
© 2004-2007 DH Instruments, a Fluke Company Page 26
OPERATION
Pressing the [RANGE] function key activates the range viewing and selecting function.
When the [RANGE] function key is first pressed, the active range is displayed. For example:
1. Q-RPT designator.
2. Type of range. DF for the Q-RPT’s default range; AR for a range
created by AutoRange.
3. Q-RPT position designator.
4. Current pressure unit of measure.
5. Full scale pressure in current unit of measure in gauge and/or
absolute measurement mode depending on type of Q-RPT and range.
Active A700K DF Hi
psi 100g/100a
Pressing the [+/-] key or the [RANGE] key again while in the RANGE functions toggles
through displays of the other available ranges, from lowest range to highest range.
To select a range to become the active range, press [ENT] while the range is displayed.
Pressing [ESC] while in the RANGE function returns to the MAIN RUN screen without
making a range change.
Range full scale limits are given in the pressure unit that is currently active for that range.
Pressing [+/-] from the MAIN RUN screen provides a shortcut to a momentary view of the
active range.
Many RPM4 settings and functions are range specific. See Table 4 for identification of
range specific settings.
For best metrological performance, vent the RPM4 Q-RPT before changing ranges.
3.3.2 [UNIT]
PURPOSE
To select the unit of measure in which RPM4 displays pressure values.
For information on selecting the measurement mode (absolute, gauge, negative gauge,
differential), see Section 3.3.3.
PRINCIPLE
RPM4 allows the unit of measure in which pressure values are displayed to be changed.
RPM4 supports 15 standard pressure units of measure as well as user defined units.
To simplify operation, quick access to six units is made available under the [UNIT] key.
The default units available depend on whether the RPM4 was originally configured as an SI
or US version. The [UNIT] key contents can be customized by the user to any configuration
of six units (see Section 3.5.6).