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Chapter 8. Specification
The following are possible:
Channel
Ps
Pt
Qc
Using a single vacuum pump, a rate of 20,000 ft/min can be achieved with a volume of
10 litres (600 cubic inches) connected to the static (Ps) channel and 6.7 litres (400 cubic
inches) connected to the pitot (Pt) channel.
8.4.3 Control Response
The required operating pressure value will be achieved without any overshoot, independent
of the system volume, on either Ps or Pt channels. The system response to input commands
takes place within a 400 millisecond period.
8.4.4 Dynamic Testing
The ADTS 405 Mk2 can generate sinusoidal variations of either the Ps or Pt or both channels.
Frequency and amplitude of the required oscillation can be programmed; external volumes
limit the achievable results. Maximum drift from the mean value during dynamic testing
should be no more than twice that specified for steady state testing.
8.4.5 Control Offset
The displayed value will be within the control stability values for the appropriate channel.
106 | ADTS 405 R/F Mk2 Instruction Manual-English
Table 8-7: Rate Control Capabilities
Rate Control Capabilities
ft/min or metres/min - maximum rate 100,000 ft/min
Absolute pressure units/min
Absolute pressure units/min
kts/min or km/h/min - maximum rate 2,000 kts/min
Differential pressure units/min
© 2017 General Electric Company – All Rights Reserved.
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