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Engine pressure ratio (EPR). EPR is defined as the ratio of Pt to Ps and is unit-less. Any of
these units can be selected by pressing the Pt units key. The choices will appear on line 4 of
the display, four at a time. The cursor is placed under the first choice. The arrow keys can be
used to move the cursor. The UP ARROW key moves the cursor left, the DOWN ARROW
key moves the cursor right. AS the cursor moves past the last selection, the next selection will
be displayed. The sample screen below shows the different Pt units, with the cursor under
“knots”.
Units: knots Feet/min
Feet
Actual: M 101.2
3500
1005 M
Target:
20.0
3000
0
Pt units : knots, Mach, PtinHg, QcinHg, ….
When the cursor is moved past QcinHg , line 4 of the display will look like this:
Pt units : …. Mach, PtinHg, QcinHg, Ptmbar, ….
Each time the cursor is moved right, the displayed units will scroll left. When the cursor is
moved to the last selection, line 4 will look like this:
Pt units : …. Qcmbar, Mph, Kmph, EPR.
Select the desired units by moving the cursor to the unit of choice and then press ENTER. The
new units will be displayed on the screen and will blink. Also, the actual and target values
will get converted into the new units and the target value will blink. This is shown in the
sample screen below where the units of Mach have been selected.
Units: Mach Feet/min
Feet
Actual: M 0.136
3500
1005 M
Target:
0.064
3000
0
The unit selection will not become effective until the GO key is pressed. The 6300 will return
to the old units if the CANCEL key is pressed. .
Static Units:
There are four Ps units to choose from: Feet, Ps inHg (Psin), meters, and
mbar (Psmb). When a particular unit is selected, the units for climb automatically changes to
selected units/minute. Any of these units can be selected by pressing the Ps Units key. Line 4
of the display will show all four units, with the cursor under “Feet”. . The arrow keys can be
used to move the cursor. The UP ARROW key moves the cursor left, the DOWN ARROW
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