SETUP
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ADTS 405 R/F Mk2 Instruction Manual-English | 87
Note:
For safety, the output valves can only be closed when the ADTS 405 Mk2 is at
ground.
7.3.9 SETUP, [MORE], [OPEN OUTPUT VALVES]
This function opens the Ps and Pt output valves after using the [CLOSE OUTPUT VALVES]
function.
Note:
For safety, the output valves can only be opened when the ADTS 405 Mk2 is at
ground.
7.3.10 SETUP, [MORE], [SYSTEM SELF TEST]
This function starts a self-test, the system pressures must be at ground pressure and the
system in Leak Measure mode. The self-test is the same test routine as in the power-up
sequence. At the end of the self-test the output valves open.
7.3.11 SETUP, ALT
This function allows the altitude correction value to be changed. If altitude correction is in use
the display shows, after warm-up, “A/C” in the lower right hand corner.
The altitude correction facility corrects for the pressure difference when the ADTS 405 Mk2
and the aircraft system are at different heights.
The ADTS 405R Mk2 altitude reference level is marked on the front panel just to the left of the
Status LED (assumes front panel is vertical). The ADTS 405F Mk2 altitude reference level is
marked on the side product label of the flight-line case (assumes front panel is horizontal). If
the ADTS is below the aircraft system, enter the correction value as a positive number. See
Section 2.4, “Positioning of the ADTS,” on page 10.
a.
Enter the height difference between the aircraft system and the ADTS 405 Mk2
altitude reference level. The units of entry are the current units or default
aeronautical units, see Section 7.4.3, “CONFIG, [UNITS],” on page 92.
7.3.12 SETUP, SPEED, [AUTO ZERO]
This function enables or disables the auto zero function. When enabled, this optimizes
airspeed accuracy at low airspeeds.
1.
When enabled the ADTS 405 Mk2 performs an auto zero when the following
conditions are met:
• Ps and Pt pressures are stable.
• If in control mode, a zero airspeed or Qc aim has been achieved.
• If in leak measure mode, the airspeed is less than 20 kts (or Qc equivalent).
2.
The auto zero will be initiated within 1 minute of achieving a new aim value and
thereafter, every 5 minutes.
3.
The auto zero sequence can be interrupted at any time by entering a new command
over the keypad or option interface.
4.
The controllers must be in measure mode when enabling or disabling auto zero.
