CATH Chamber (Combined Altitude, Temperature & Humidity Chamber) 

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.

 

VibationTester-specs

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.

 

 FeaturesBenefits
Test Space

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 BodyThe 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.

Insulation

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.
Door

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 SystemStainless 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 SystemHigh 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.

De-Humidification System

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.
Humidification System

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 TowerFRP 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

S. No

Description

Specification

1

Test Space Dimensions

1500L (1000W x 1500D x 1000H) mm

2

Temperature Range

-70°C to 100°C

3

Temperature Fluctuation

0.1°C to 1°C

4

Temperature Gradient

0.5°C to 1.5°C

5

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

6

Humidity Range

10 %RH to 95 %RH

7

Humidity Control Accuracy

+ 3% RH

8

Dew Point Temperature Range

4oC  to 90oC (Corresponding to 10oC to 95oC of chamber)

9

Altitude Range Ambient to 1 mbar
10 Altitude Resolution 1 mbar or better
 11Power Supply415 V AC,  ±10%, 3 Phase, 50 Hz.

Venue: CTC Complex, Chennai, India | Date: January 10-12, 2018 | Our Booth No.: 2042
Products on Display: All environmental chambers for automotive testing