Aircraft Oxygen Control System Testing
The Partial Pressure of Oxygen also defined as pressure exerted by oxygen component of air decreases in direct proportion to air pressure, while the altitude increases it become more difficult for humans to inhale oxygen which unfortunately if prolonged cause hypoxia and eventually death. To avoid hypoxia oxygen monitoring & controlling system in military aircraft maintains minimum Partial Pressure of Oxygen equivalent of sea level. Hence it is very important that reliability of such lifesaving system is uncompromised but how? Well, it’s CME! Time and again our state of art Altitude Chambers have stood on its reputation of the most preferred in defence industry for such sophisticate reliability testing.
The Partial Pressure of Oxygen also defined as pressure exerted by oxygen component of air decreases in direct proportion to air pressure, while the altitude increases it become more difficult for humans to inhale oxygen which unfortunately if prolonged cause hypoxia and eventually death. To avoid hypoxia oxygen monitoring & controlling system in military aircraft maintains minimum Partial Pressure of Oxygen equivalent of sea level. Hence it is very important that reliability of such lifesaving system is uncompromised but how? Well, it’s CME! Time and again our state of art Altitude Chambers have stood on its reputation of the most preferred in defence industry for such sophisticate reliability testing.
Be it Gaseous Oxygen Systems or Liquid Oxygen Systems or even On-Board Oxygen Generation Systems, our chamber is customisable to test such systems. The chamber mentioned here has ability to simulate altitude range from ambient to 10mbar (100,000ft) with varying temperature range between -70 °C to +180 °C and ramp rate of 5°C/min average from -55°C to +85° C with (50 Kg alloy +30 Kg steel) and ≤500W thermal load. It has cascade refrigeration system with brazed plate heat exchanger and semi-hermetically sealed reciprocating compressor which is built on our On-Demand Cooling technology which ensures significant power saving.
| Description | Specification | ||||
| Workspace Dimensions – WxDxH | |||||
| mm | 1000 | x | 1000 | x | 1000 |
| In | 39 | x | 39 | x | 39 |
| Volume | |||||
| Ltr | 1000 | ||||
| Cuft | 35 | ||||
| Temperature Range | |||||
| °C | -70 | To | 180 | ||
| °F | -94 | To | 356 | ||
| Ramp Rates | |||||
| Cooling °C/min | 5 [-55 to +85] | ||||
| Heating °C/min | 5 [-55 to +85] | ||||
| Altitude Range | |||||
| mbar | Atmospheric to 1 | ||||
COMMUNICATION
Ethernet
Ethernet capability to remotely monitor and control the chamber.
USB
USB Type-A host port to connect a keyboard or mouse or download CSV data via pen drive [max 2GB] USB Type-B data port for connection to PC for software upgrade and access memory card storage
Web Server
Built-in web server allows remote view or control from any internet connected PC, tablet or smart phone
NI Lab view
The communication which used is MODBUS RTU protocol, which is an international standard for communication in process instrumentation and automation. Necessary changes to be made in the user’s software to communicate this in MODBUS RTU universal protocol. This feature can be used manual mode only.
Hardware
Hardware
Enhanced with modular controller integrating multi-zone PID control and data acquisition. SIMATIC programmable logic controller. Touch screen controller, PLC and other controller components are of a generic make with an OEM software. Free software upgrades up to one year.
Memory
SD card of 2GB memory will store all the test program data and also the diagnostic data. This card is accessible by USB and Ethernet.
Digital Events
1 digital output for switching test specimen via potential free contacts, load max. 24 VDC, 5A
Programming & Report Generation
Programs
99 independent programs can be stored with name and number. Each of these programs have segments which can be looped to a previous segment and repeated up to 999 cycles, creating almost unlimited number of segments The chamber can be operated in manual mode, where the set point can directly be changed in the home screen The ramp rate can be set as a value in °C/min or ramp time Graphical representation of the temperature program The time is logged only when the set valve is within the band.
Trend Graph
Real time trend graph for temperature set value, temperature process value, humidity set value and humidity process value. Options of zoom in/out, pan and individual plot selection
Safety & Security
Power Resumption Modes
In case of a power failure, option of conditional restart based on temperature/time or continuous
Security
Multi level security of guest, user, admin and factory level users with individual password protection All settings can be reset to factory defaults using admin login
PID
6 zone based PID’s with auto recall of PID based on type of program, segment and zone can be set. Each of these PID’s can be set by using the auto tune feature or manually based on user’s requirements.
Process Mimic
Graphical representation of the working of the chamber, with live status of all the components, including the current temperature/humidity process values, compressor suction/discharge pressures and return gas temperature
Service & Maintenance
Delay Start
Real time clock based, delayed start function
Diagnostics
Event viewer will display a log of all errors/actions with a date and time stamp PLC inputs and outputs status will be indicated
Service Monitor
Log of critical components life cycle with a predefined life cycle time and elapsed time in hours
