3. OPERATION
Page 27
© 2005-2007 DH Instruments, a Fluke Company
THIRD [RANGE] SELECTION: SHORTCUT TO AIRSPEED AT VARYING
ALTITUDE
Selects Hi Q-RPT in absolute, differential
measurement mode (
<Hd>
) with RPT
display in which differential pressure
(Qc) is displayed on top line and Lo
Q-RPT (Ps) on bottom line. Unit of
measure is default or last selected
airspeed and altitude units.
Shortcut to airspeed
& varying altitude
From the third
[RANGE]
display, pressing
[RANGE]
again returns to the first
display.
Q-RPT full scale limits are given in the pressure or air data unit that is currently
active for that range.
Pressing [+/-] from the MAIN RUN screen provides a shortcut to a
momentary view of the active Q-RPT.
Many RPM4-AD settings and functions are Q-RPT specific. See Table 5 for
identification of Q-RPT specific settings.
For best metrological performance, vent the RPM4-AD Q-RPT before
changing active Q-RPT.
3.3.2
[UNIT]
PURPOSE
To select the unit of measure in which RPM4-AD displays measured values.
The units of measure available under the [UNIT] key depend upon the active Q-RPT and
measurement mode. Seen Section for 3.3.1 information on selecting the active-Q-RPT and
Section 3.3.3 for information on setting measurement mode (absolute, gauge, differential)
To change the unit of altitude displayed on the RPM4-AD bottom line with HL, absolute or
Hi, ab differential (Hd) Q-RPT active, select [DISPLAY], <4PRT> to select the
altitude unit for the bottom line display with HL, absolute or Hi, ab differential Q-
RP Tactive. 3.3.6.4.
PRINCIPLE
RPM4-AD allows the unit of measure in which measured values are displayed to be changed.
RPM4-AD supports a variety of standard pressure units of measure, air data scaling factors
and user defined units. To simplify operation, quick access to six units is made available
under the
[UNIT]
key. The default units and the units that are supported depend on which
