CYCOGS® brand, Test Equipment, the ACC Chamber

Altitude Control Chamber for Simulations  (ACC)

The  Altitude Control Chamber (ACC) series  is an advanced computer-controlled simulator of atmospheric effects of temperature, pressure and relative humidity.  High-performance systems allow very fast changes to the conditions inside its test chamber.  The ACC Chambers are suitable for Aviation and Weather Simulations.  Chamber sizes are generally under 8 cubic feet. 

ACC series Photo.

This test chamber contains numerous sensors and controls for monitoring your testing. 

Such sensors may include temperature, Humidity, Pressure and other sensors. 

Altitude Control Chamber Specifications:

The altitude control chambers are typically customized to order.  Customer needs determine the chamber design, specifications and features.  Test parameters and the chamber specifications are engineered to deliver a quality system. 

ACC Chamber hatch and door photo.

Chamber Sizes Options:
(May not be required for some applications.  Some items available through the CYCOGS Company or your supplier.)
Standard Chamber By special order such as 60.96cm x 60.96cm x 60.96cm. (24" x 24" x 24")
Chamber size ranges S1049cu cm to 1812278.18cu cm. (64cu " to 110592 cu ")
Door Sizes Application will determine the size.
View ports Application will determine the size.
Environmental Range (an example.)
Temperature Maximum 93C. (200F) (Typical)
Temperature Minimum -56C. (-70F) (Typical)
Temperature Change Rate 30C / minute. (both directions) (Typical)
RH Minimum Near 0% RH dependent on temperature and pressure.
RH Maximum Near 100% dependent on temperature and pressure.
RH Change Rate 20% / minute. (both directions) (Typical)
Pressure Maximum 1.15 Bars. (1.136atm) (862.5 torr) (33.96"Hg)
Pressure Minimum 50 mBars. (0.0194 atm) (37.5 torr) (1.476"Hg)
Pressure Change Rate Pressure 800 torr / min. Vacuum 760 torr to 100 torr 1 minute. 100 to 37.5 in 5 minutes.
Chamber Construction Test chamber constructed out of stainless steel. Various finishes are available.
Chamber heat exchange Provided by outer wall (external) or a heat plate (internal).

ACC Chamber Inside the chamber Photo.

Option 1 Air Circulation fans.
Option 2 Electronics feed-throughs.
Option 3 ESD protections.

Relative Humidity: The standard setup is in a 22.8°C (73°F) room. 
Please contact us for details and suggestions.
Option 1 Below 10% operations
Option 2 Above 95% operations  - Condensing water may result in erratic results.

Temperature Control: The standard setup exchanges heat to ambient room conditions using two stage chillers and electric heaters.  Working Fluid:  Dependent on conditions and chamber design. 

Power Typically, 240 VAC 3 phase 50A 60Hz.
Auxiliary inputs Room condition recording.
Vacuum pumps exhaust vent Vented outside required.
Optional House vacuum if available, may be used.
Nitrogen Supply Nitrogen Purge.
Air pressure House Air Pressure may be used.
Distilled water Distilled water systems.
Water drain Water drain systems.
Option 2 Network connections.


Actual placement requires extra room around the units. 
Test unit:  Dependent on requirements. 
Utility cart:  Dependent on requirements. 

System configuration and specifications may change without notice. 

ACC series test system photo.

Altitude Control Chamber  General Description

The ACC is an advanced test chamber used to simulate atmospheric conditions.  Variables include controlling pressure, temperature and relative humidity for testing and evaluating properties of materials, processes and systems. 

An electronics test lab certifying their product.
A research organization testing material properties.
An aerospace company simulating systems performance.
An electronics company testing for moisture effects.

Test Types:

The environmental tests can be conducted using various environmental conditions. 
Relative humidity profiles include steady state, steady state plus steps, square wave with ramp control (trapezoid.) 

Chamber details:

The environmental chambers are barometric pressure compensated, to protect your long duration testing with changes in the weather.  Significant errors can occur if this aspect is overlooked.  RH probe calibrations  can remain an issue, backup measuring systems may be needed if this is a critical parameter. 
Extended duration testing,  depending on cycle rate and amplitude may require pauses for maintenance on systems without redundant vacuum pumps and RH probes.  Some high-performance systems may require the use of exotic  (expensive)  working fluids. 
Distilled water utilized in the RH production will need to be replaced as water vapor is removed from the chamber by the vacuum pumps.  Nitrogen purges may in addition be required for cold dry systems,  as condensation will produce ice in some working fluids. 

ACC Chamber open Inside photo


The ACC has numerous subsystems.  The power is distributed through a high current sub-panel located in the utility cart.  This power is utilized for such systems as the vacuum pumps, chillers and heaters.  Numerous sensors allow the system to interface with the computer.  The computer is a current generation running Microsoft® Windows operating system.  The analog interface electronics uses 16-bit or higher precision. 


The Microsoft® Windows® based HMI  (Human Machine Interface)  software controls the ACC.  Concurrent multithreaded processes ensure superior level of performance and self-monitoring.  The software is custom designed for this machine.  Basic data storage is in the form of an ASCII text comma separated values (CSV) file that can be read by any software that can read a text file. 
One option is to collect the data in a Microsoft® SQL Server® data storage system.  The custom software also semi-automates sensor calibration.  Data can be played back with a second program using a similar screen for review or demonstrations. 

Please note:
The CYCOGS ACC Chamber systems are not waterproof for outside use or in wet or condensation prone environments.  In addition, the ACC systems should not be operated in an excessively dusty or combustible or other hazardous environments.  Personal and property damage may occur if used in an unsafe fashion or unsuitable environment.  Proper end-user design, operation, safeguarding, programming and training, including other safe operation tasks and safety procedures are recommended and remains the end-user’s responsibility.  OEM manufacturers and other purchasers of CYCOGS products and systems, as the purchaser, assumes responsibility and potential liability for safe implementation and use of these CYCOGS products and systems.

Please contact us here at the CYCOGS Company if you encounter additional questions or environmental application needs.

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The CYCOGS® ACC system projects are under development and offered in advance as a customized manufactured system; Standard models may not yet be available at this time.  As the CYCOGS development effort in core technology and key concepts continues, the CYCOGS® Company reserves the right to progressively change some specifications and data or is not available or suitable for widespread dissemination for all products.  Pre-production information is not fully available for some specific products at this time.  Sensors, customizations and other integrations may result in an additional cost.

CYCOGS reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in design of its products.  Components made under military approvals will be in accordance with the approval requirements.  The information included herein is believed to be accurate and reliable.  However, CYCOGS assumes no responsibility for its use;  nor for any infringements of patents or other rights of third parties that may result from its use. 

Liability Disclaimer:

The CYCOGS Company is not liable for the use, installation, performance or fitness of this component or system.  Your purchase properly indicates you fully assume the risk of its proper use and its subsequent installation and end user training and potential liability.  The CYCOGS Company patented intellectual property is strictly enforced and carefully protected.  The CYCOGS Company warranties the systems it sells from component defects or hardware failure for the period of one year after completing the purchase.

Please specify your CYCOGS® brand, Test Equipment, the ACC Chamber, design requirements for quotes and purchase.  Advanced orders may be accepted, please contact CYCOGS sales for more information.

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The CYCOGS® Company is a privately owned, 100% American company and is based in the state of Wisconsin.
The CYCOGS OEM engineered products and systems are carefully designed, made, built and assembled in the state of Wisconsin, USA.
The CYCOGS® Company strives to intentionally use American domestic components whenever possible.  Some of the key components may be sourced from the only available manufacturer, which may be owned, created or delivered from other countries.

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