3Stab - Fluke RPM4-AD Operation And Maintenance Manual

RPM4-AD™ OPERATION AND MAINTENANCE MANUAL
The displayed resolution is fixed for altitude units at "1" for 1, 0.1 and 0.01% resolution; 0.1 for
0.001% resolution; 0.01 for 0.0001% resolution.
3.4.3 <3STAB>
PURPOSE
To view and/or adjust the stability test that is the Ready/Not Ready criterion for the active
RPT and range.
See Section 3.2.4 Pressure Ready/Not Ready Indication.
PRINCIPLE
RPM4-AD continuously monitors the rate of change of pressure measured by the active
Q-RPT and compares this rate to the stability limit to make a Ready/Not Ready determination
(see Section 3.2.4 Pressure Ready/Not Ready Indication). The stability function allows the
stability limit to be adjusted by the user to increase or decrease the stability required for a
Ready condition to occur.
Default stability limits are:
RPM4-AD A160K/A160K, all Q-RPTs
Absolute and gauge measurement modes: +/- 3 Pa ( 0.00044 psi) or air data equivalent.
RPM4-AD A350K/A160K, A160K (Lo) Q-RPT
Absolute and gauge measurement modes: +/- 3 Pa ( 0.00044 psi) or air data equivalent.
RPM4-AD A350K/A160K, A350K (Hi) Q-RPT
Absolute, gauge and absolute differential measurement modes: +/- 6 Pa ( 0.00088 psi) or air
data equivalent.
The stability limit is separate and different from the Rate DISPLAY function (see Section
3.3.6.2) which allows the current rate of change of pressure to be displayed.
OPERATION
To access the stability setting adjustment, press [SETUP], <3stab>. The display is:
The stability limit is always displayed in the current
unit of measure if the unit of measure is a pressure
unit. If the unit is an airdata unit, the stability limit is
expressed in Pascal (Pa), the SI unit of pressure.
Edit the desired stability limit setting if desired. [ENT] activates the stability limit for the active
Q-RPT and returns to the MAIN RUN screen Press [ESC] to return to the MAIN RUN screen
with no change to the stability limit.
The default stability limit is + 3 Pa (0.00044 psi) for A160K Q-RPTs in all measurement
modes and + 6 Pa (0.00088 psi) for the A350K Q-RPT in all measurement modes.
The stability setting is Q-RPT specific. A stability setting made for one Q-RPT does NOT
affect other Q-RPTs.
© 2005-2007 DH Instruments, a Fluke Company
Stability:
3 Pa
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