CATH chamber can simulate pressure, temperature and humidity in its test space. It is also known as combined altitude, temperature and humidity chamber which is primarily used in R&D and testing of aerospace components. The chamber meets many international standards including MIL and RTCA. The standard range of the CATH chamber includes 540 L , 1000 L and 1500 L while we also offer custom sizes as per customer requirement.
The chamber can simulate altitude range from sea level to 1 mbar which is equivalent to 50km ASL. The temperature range is from -70°C to 180°C and ramp rates starting from 3°C/min up to 25°C/min are available. The humidity range is 10% to 98% RH. Complex test standard such as CATH of MIL-STD-810G or RTCA DO-160 for airborne equipment are programmable using the envicom Graphite. The envicom Graphite is a colour touchscreen using Siemens SIMATIC controllers.
The chamber has mono block construction with epoxy based electrostatic powder coated surface. The test space is made of pre-polished stainless steel ensuring vapour tight enclosure with no conduction between test space & exterior. Inside the test space the specimen is conditioned with laminar air flow for uniform airflow across the work space & test specimen.
The desired level of lower humidity is achieved by using the refrigeration based de-humidification system. High Capacity ultra-low temperature compressor is used with water cooled condenser driven by a co-axial fan. All configuration and monitoring is done through a colour touch screen display controller which has 100 Programs with a maximum of 99 segments nested. Also offer repeat cycles maximum up to 999 times and 5 program links.
Combination of temperature, humidity and pressure in the CATH chamber demands heavy duty construction and yet equipped with advance features.
Test space is made of pre-polished stainless steel. All seams are TIG welded.
Ensures a vapour tight enclosure in test space.
No conduction form the test space to the exterior.
|Exterior Body||The chamber follows mono block construction with epoxy based electrostatic powder coated surface. The chamber is fitted with leveling casters for easy mobility.||Strong rigid construction with heigh wear resistance.|
|Test Space Conditioning|
The test space is conditioned with laminar air flow.
Only the impeller is exposed in the conditioning plenum which is covered with a removable sheet.
Laminar flow ensures uniform airflow across the work space & test specimen.
The conditioning plenum is covered with a removable sheet which provides easy access for maintenance.
The insulation material is of low `k’ factor, high density and non-hygroscopic nature.
Asbestos free mineral fiber insulation
| The multi layered insulation ensures minimum heat loss.|
The test space door has robust hinges on R.H.S with a clamp-on latch. The inner surface is pre-polished stainless steel with double continuous seal rings of silicone rubber material. will be provided as the gasket to ensure complete sealing.
The door also has a micro switch which enables interlock between the conditioning fan and the door opening. A viewing window (400 mm x 400 mm) is also fitted on the door to have a clear view of specimen under testing.
|Silicone seal rings ensure complete sealing and minimum heat loss.|
|Heating System||Stainless steel sheathed air heaters which are placed in the conditioning plenum are used to achieve the desired positive set temperature.||Avoid heat loss and maintains same efficiency during different test cycles.|
|Refrigeration System||High Capacity ultra-low temperature compressor is used with water cooled condenser driven by a co-axial fan. The compressor is kept on anti vibration mounts for safe and efficient performance.|
The heat exchanger coils are Inner grooved copper tubes offering maximum heat transfer.
Eco friendly Non-CFC refrigerants like R-404a & R-23 are used.
The desired level of lower humidity is achieved by using the refrigeration based de-humidification system
|As the output is automatically be activated based on the set point as well as in ramp up mode after a low temperature cycle it offers maximum efficiency.|
A low-pressure droplet free vapor boiler with direct vaporization system is used here.
Reservoir is provided at the side of the chamber with suitable connection. The de-mineralised water (recommended) is connected to the reservoir and is controlled automatically.
|Minimum humidity fluctuations.|
|Cooling Tower||FRP Cooling tower with stand by pump along with water softener unit which can be rechargeable periodically to handle water hardness less than 5PPM.|| |
|Instrumentation & Control|
A high functional dual loop program accessed on a 5.7” LCD monitor.
All configuration and monitoring is done through a color touch screen display controller which has 100 Programs with a maximum of 99 segments nested. Also offer repeat cycles maximum up to 999 times and 5 program links.
Sensing done through a Platinum resistance RTD PT-100
In built option to restart, break or cold start the test chamber after power failure.
|Offer quick and easy mode of chamber operations.|Technical Specification of the Test Chamber
Test Space Dimensions
1500L (1000W x 1500D x 1000H) mm
-70°C to 100°C
0.1°C to 1°C
0.5°C to 1.5°C
Rate of Change (Cooling) / Rate of Change (Heating)
5oC/min with a payload of 50 Kg of Aluminium and thermal load of 1000 watts. 5oC/minlinear in the temperature range from 45oC o -40oC
10 %RH to 95 %RH
Humidity Control Accuracy
+ 3% RH
Dew Point Temperature Range
4oC to 90oC (Corresponding to 10oC to 95oC of chamber)
|Altitude Range|| Ambient to 1 mbar|
|10|| Altitude Resolution|| 1 mbar or better|
| 11||Power Supply||415 V AC, ±10%, 3 Phase, 50 Hz.|