CM170407AMA
selected area of the screen.
SHIFT: has the same function as a shift key on a computer keyboard. It is used together
with other keys to command alternative key functions (e.g. SHIFT followed by 4 to activate
the “Remote mode”).
A summary of SHIFT key operations is shown in SECTION 13. Please note that the SHIFT
key must be pressed before other keys, and not at the same time. A small arrow appears
in the lower-left corner of the display while the SHIFT key is active.
The ENTER key is used to input desired data the MPS49. The operation is the same as the
“Enter” key on a computer keyboard.
BACKSPACE: is used to delete the last entered digit for correcting mistakes.
LEAK: is used to automatically perform a leak test using the built in timer/stopwatch
function of the MPS49. The HALT, MEAS and CNTR end the leak test.
VENT (activated by pressing SHIFT then LEAK in sequence) is used to vent the pressure in
the static and pitot lines to ambient pressure. This function enables the safe disconnection
of test lines from the aircraft / UUT at the end of testing. The MEAS and CNTR keys are
used to restore the MPS49 to the MEASURE and CONTROL modes respectively, after the
vent function has been activated. The HALT key interrupts the procedure and returns the
MPS49 to CONTROL mode.
The UP and DOWN triangle keys ▲ and ▼ are used:
• to increase or decrease the selected parameters (altitude, airspeed, rate etc.) by a
selected value;
• to navigate inside the menus;
• in the Display Screen, to adjust the display brightness (refer to paragraph 10.2).
Numerical keypad
The keypad is a standard telephone layout ten-number keypad. The numerical keys (0–9)
are used to enter any desired value for the various controlled parameters. After keying in a
number, the Operator must always press ENTER to confirm and commit the value into the
system.
NOTE For some optional operations, number keys may be used in combination with the
SHIFT key, to access additional functions.
The 000 key is a shortcut to enter three consecutive zeros.
The decimal point key (.) is used to input decimal points when required (e.g. airspeed).
The minus key (–) is used to enter negative numbers (e.g. an altitude value below sea
level).
Entering text using the numerical keypad
The numerical keypad is also used to enter text data. Each key can be used to enter the
letters and symbols that are printed on the key itself. Press the key repeatedly to cycle
through all its symbols.
An empty space can be entered by pressing once the key '1'.
D.Marchiori Copyright 17
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